/* ==========================================================================
   MISHRA GROUP INSTITUTE - B.TECH CYBER SECURITY (3CYBER7) DESIGN SYSTEM
   ========================================================================== */

:root {
  /* Color Palette - Dark Theme (Default) */
  --bg-main: #0a0e17;
  --bg-card: rgba(18, 24, 38, 0.85);
  --bg-card-hover: rgba(28, 38, 58, 0.95);
  --bg-glass: rgba(15, 23, 42, 0.75);
  --bg-glass-strong: rgba(11, 15, 25, 0.92);
  --bg-input: rgba(15, 23, 42, 0.8);
  --bg-modal: #0d1322;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-hover: rgba(56, 189, 248, 0.3);
  --border-glass: rgba(255, 255, 255, 0.12);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  /* Accent Colors */
  --primary: #2563eb;
  --primary-glow: rgba(37, 99, 235, 0.35);
  --primary-gradient: linear-gradient(135deg, #1d4ed8 0%, #3b82f6 50%, #06b6d4 100%);
  --secondary-gradient: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
  
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-purple: #8b5cf6;

  /* Status Colors */
  --status-present: #10b981;
  --status-absent: #ef4444;
  --status-leave: #f59e0b;
  --status-live: #06b6d4;

  /* Layout Tokens */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 25px rgba(37, 99, 235, 0.3);

  --font-main: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --sidebar-width: 270px;
  --bottom-nav-height: 68px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-main: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --bg-glass-strong: rgba(248, 250, 252, 0.95);
  --bg-input: #f8fafc;
  --bg-modal: #ffffff;

  --border-color: rgba(0, 0, 0, 0.08);
  --border-color-hover: rgba(37, 99, 235, 0.35);
  --border-glass: rgba(0, 0, 0, 0.1);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
}

/* Base & Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  width: 100%;
  height: 100%;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  width: 100%;
  min-height: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-main);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.5;
  font-size: 15px;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button, a, input, select, textarea {
  touch-action: manipulation;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  outline: none;
  border: none;
}

button {
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Utility Containers */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.view-section {
  display: none;
  width: 100%;
  animation: fadeIn 0.3s ease-out;
}

.view-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Glassmorphism card */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.glass-card:hover {
  border-color: var(--border-color-hover);
}

/* ==========================================================================
   AUTH SCREENS (STUDENT & ADMIN LOGIN)
/* ==========================================================================
   AUTH SCREENS (STUDENT & ADMIN LOGIN)
   ========================================================================== */
.auth-wrapper {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 20px;
  background: radial-gradient(circle at 50% 15%, rgba(37, 99, 235, 0.22) 0%, transparent 60%),
              radial-gradient(circle at 85% 85%, rgba(6, 182, 212, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 15% 85%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
              var(--bg-main);
  position: relative;
  overflow-y: auto;
}

.auth-container {
  width: 100%;
  max-width: 460px;
  margin: auto;
  position: relative;
  z-index: 1;
}

@media (min-width: 920px) {
  .auth-container {
    max-width: 980px;
    display: grid;
    grid-template-columns: 1fr 1.15fr;
    background: var(--bg-card);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.7), 0 0 40px rgba(56, 189, 248, 0.15);
    overflow: hidden;
  }

  .auth-hero-panel {
    display: flex !important;
    flex-direction: column;
    justify-content: space-between;
    padding: 44px 38px;
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.7) 0%, rgba(15, 23, 42, 0.85) 100%);
    border-right: 1px solid var(--border-glass);
    position: relative;
  }

  .auth-card {
    border: none !important;
    box-shadow: none !important;
    background: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    max-width: 100% !important;
    padding: 44px 38px !important;
  }

  .auth-card .auth-header {
    display: none !important;
  }

  .auth-card .desktop-card-header {
    display: block !important;
  }
}

.auth-hero-panel {
  display: none;
}

.desktop-card-header {
  display: none;
  margin-bottom: 20px;
}

.auth-card {
  width: 100%;
  padding: 34px 26px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

/* Quick Role Chips */
.role-chips-row {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
  padding: 4px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.role-chip {
  flex: 1;
  padding: 8px 4px;
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.role-chip:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.role-chip.active {
  background: var(--primary-gradient);
  color: #ffffff;
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.4);
}

/* Hero features list */
.hero-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: 10px;
}

.hero-feature-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(56, 189, 248, 0.15);
  font-size: 16px;
  flex-shrink: 0;
}

.hero-feature-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.hero-feature-desc {
  font-size: 11.5px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Server connection badge */
.server-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 600;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
}

.server-status-pill.offline {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.3);
  color: #fbbf24;
}

.server-status-pill.testing {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.3);
  color: #38bdf8;
}

.auth-header {
  text-align: center;
  margin-bottom: 24px;
}

.auth-logo {
  width: 68px;
  height: 68px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: var(--primary-gradient);
  box-shadow: var(--shadow-glow);
}

.auth-logo svg {
  width: 42px;
  height: 42px;
}

.auth-title {
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.auth-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
}

.auth-badge {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 12px;
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #60a5fa;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.auth-toggle-tabs {
  display: flex;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: 20px;
}

.auth-toggle-btn {
  flex: 1;
  padding: 10px 0;
  text-align: center;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
}

.auth-toggle-btn.active {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 7px;
}

.input-container {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
}

.form-control {
  width: 100%;
  padding: 12px 14px 12px 42px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  transition: all 0.2s ease;
}

.form-control:focus {
  border-color: var(--primary);
  background: var(--bg-card-hover);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.form-control.has-action {
  padding-right: 42px;
}

.input-action-btn {
  position: absolute;
  right: 10px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  font-size: 13px;
  line-height: 1;
  user-select: none;
  z-index: 2;
}

.input-action-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
}

/* Browser Autofill Theme Normalization (Prevents Dark Mode crash & flashing) */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 1000px var(--bg-input) inset !important;
  -webkit-text-fill-color: var(--text-primary) !important;
  caret-color: var(--text-primary) !important;
  border-color: var(--border-color) !important;
  transition: background-color 5000s ease-in-out 0s;
}

[data-theme="light"] input:-webkit-autofill,
[data-theme="light"] input:-webkit-autofill:hover,
[data-theme="light"] input:-webkit-autofill:focus,
[data-theme="light"] input:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 1000px #f8fafc inset !important;
  -webkit-text-fill-color: #0f172a !important;
  caret-color: #0f172a !important;
  border-color: #cbd5e1 !important;
}

.live-timer-badge {
  font-variant-numeric: tabular-nums;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.live-timer-badge strong {
  color: #38bdf8;
  font-weight: 800;
}

.btn-primary {
  width: 100%;
  padding: 14px;
  border-radius: var(--radius-md);
  background: var(--primary-gradient);
  color: #ffffff;
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: var(--shadow-glow);
  margin-top: 10px;
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
}

.btn-primary:active {
  transform: translateY(0);
}

.demo-credentials-box,
.demo-btn-fill {
  display: none !important;
}

/* Secondary Buttons & Utilities */
.btn-sec,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  box-sizing: border-box;
}

.btn-sec:hover,
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(56, 189, 248, 0.5);
  color: #38bdf8;
  transform: translateY(-1px);
}

.btn-sec:active,
.btn-secondary:active {
  transform: translateY(0);
}

/* Compact Table Action Buttons */
.btn-table-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
  box-sizing: border-box;
  text-decoration: none;
}

.btn-table-action:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: rgba(56, 189, 248, 0.4);
  color: #38bdf8;
  transform: translateY(-1px);
}

.btn-table-action.btn-action-warning {
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.08);
}

.btn-table-action.btn-action-warning:hover {
  background: rgba(245, 158, 11, 0.2);
  border-color: rgba(245, 158, 11, 0.6);
  color: #f59e0b;
}

.btn-table-action.btn-action-success {
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.08);
}

.btn-table-action.btn-action-success:hover {
  background: rgba(16, 185, 129, 0.2);
  border-color: rgba(16, 185, 129, 0.6);
  color: #10b981;
}

.btn-table-action.btn-action-danger {
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.08);
}

.btn-table-action.btn-action-danger:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.6);
  color: #ef4444;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 13.5px;
  transition: all 0.2s ease;
  box-sizing: border-box;
}

.form-input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.3px;
}

/* ==========================================================================
   STUDENT WEB APP / PWA INTERFACE
   ========================================================================== */
.student-app-layout {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  min-height: 100vh;
  min-height: 100dvh;
  padding-bottom: calc(var(--bottom-nav-height) + var(--safe-bottom) + 24px);
  position: relative;
  box-sizing: border-box;
}

@media (max-width: 768px) {
  .student-app-layout {
    max-width: 100%;
  }
}

/* Top App Bar */
.student-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: max(12px, var(--safe-top)) 16px 12px;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  width: 100%;
  box-sizing: border-box;
}

.student-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.brand-crest {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-text {
  min-width: 0;
  overflow: hidden;
}

.brand-text h1 {
  font-size: 14.5px;
  font-weight: 800;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-text span {
  font-size: 11px;
  color: var(--accent-cyan);
  font-weight: 600;
  display: block;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.icon-btn:hover {
  background: var(--bg-card-hover);
  color: #38bdf8;
}

.badge-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: var(--accent-rose);
  border-radius: 50%;
  border: 2px solid var(--bg-main);
}

/* Main Content Area */
.student-content {
  padding: 18px 18px 24px;
}

/* Greeting Hero Card */
.greeting-hero {
  padding: 22px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.7) 0%, rgba(15, 23, 42, 0.9) 100%);
  border: 1px solid rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-md);
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.greeting-hero::after {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.3) 0%, transparent 70%);
  pointer-events: none;
}

.greeting-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 14px;
}

.greeting-text h2 {
  font-size: 20px;
  font-weight: 800;
}

.greeting-text p {
  font-size: 12px;
  color: #93c5fd;
  margin-top: 2px;
}

.student-tag-badge {
  padding: 4px 10px;
  background: rgba(6, 182, 212, 0.2);
  border: 1px solid rgba(6, 182, 212, 0.4);
  color: #38bdf8;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
}

.student-meta-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.meta-chip {
  padding: 4px 10px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-md);
  font-size: 11px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 5px;
}

.meta-chip strong {
  color: var(--text-primary);
}

/* Next Class Card */
.next-class-card {
  padding: 18px 20px;
  margin-bottom: 20px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12) 0%, rgba(15, 23, 42, 0.85) 100%);
  border: 1px solid rgba(16, 185, 129, 0.3);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.class-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.class-status-badge.live {
  background: rgba(6, 182, 212, 0.2);
  color: #38bdf8;
  border: 1px solid rgba(6, 182, 212, 0.4);
  animation: pulseGlow 2s infinite;
}

.class-status-badge.upcoming {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.4);
}

@keyframes pulseGlow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.next-class-subject {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-primary);
}

.next-class-details {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 3px;
}

/* Quick Action Grid */
.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 22px 0 12px;
}

.section-heading h3 {
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.quick-actions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 12px;
  margin-bottom: 22px;
}

@media (max-width: 480px) {
  .quick-actions-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
  }
}

.action-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 14px 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all 0.2s ease;
}

.action-card:hover {
  transform: translateY(-2px);
  background: var(--bg-card-hover);
  border-color: var(--border-color-hover);
}

.action-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 8px;
}

.action-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-primary);
}

/* Quick Stats Bar */
.quick-stats-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 22px;
}

.stat-box {
  padding: 16px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 14px;
}

.stat-ring {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 13px;
  background: conic-gradient(var(--status-present) calc(var(--percent, 85) * 1%), rgba(255,255,255,0.1) 0);
  position: relative;
}

.stat-ring::before {
  content: '';
  position: absolute;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-card);
}

.stat-ring span {
  position: relative;
  z-index: 1;
}

.stat-info h4 {
  font-size: 18px;
  font-weight: 800;
}

.stat-info p {
  font-size: 11px;
  color: var(--text-muted);
}

/* Today's Schedule Cards List */
.schedule-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 10px;
}

.schedule-item-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  margin-bottom: 10px;
  transition: all 0.2s ease;
}

.schedule-item-card.is-live {
  border-color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.08);
}

.schedule-time-box {
  min-width: 68px;
  text-align: center;
  padding: 6px;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
}

.schedule-info {
  flex: 1;
}

.schedule-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.lab-chip {
  font-size: 10px;
  padding: 2px 6px;
  background: rgba(139, 92, 246, 0.2);
  border: 1px solid rgba(139, 92, 246, 0.4);
  color: #a78bfa;
  border-radius: 4px;
  font-weight: 700;
}

.schedule-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Bottom Navigation Bar */
.bottom-nav-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(var(--bottom-nav-height) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: var(--bg-glass-strong);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-around;
  z-index: 100;
  max-width: 100%;
  margin: 0 auto;
  box-sizing: border-box;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (min-width: 768px) {
  .bottom-nav-bar {
    bottom: 14px;
    left: 50%;
    transform: translateX(-50%);
    width: auto;
    min-width: 520px;
    max-width: 640px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-glass);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
    padding: 6px 16px;
  }
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  background: transparent;
  padding: 4px 6px;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  flex: 1;
  min-width: 0;
  text-align: center;
  touch-action: manipulation;
}

.bottom-nav-item span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.bottom-nav-item svg {
  width: 22px;
  height: 22px;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.bottom-nav-item.active {
  color: #38bdf8;
}

.bottom-nav-item.active svg {
  transform: translateY(-2px);
  stroke: #38bdf8;
}

/* ==========================================================================
   DYNAMIC QR ATTENDANCE SCANNER & GPS VERIFICATION
   ========================================================================== */
.scanner-viewport-card {
  position: relative;
  width: 100%;
  max-width: 380px;
  height: 270px;
  margin: 0 auto 16px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: #040711;
  border: 2px solid rgba(56, 189, 248, 0.45);
  box-shadow: 0 0 25px rgba(6, 182, 212, 0.25), inset 0 0 30px rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
}

#qr-video-feed {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.scanner-laser {
  position: absolute;
  top: 15%;
  left: 8%;
  right: 8%;
  height: 3px;
  background: linear-gradient(90deg, transparent, #06b6d4, #38bdf8, #60a5fa, transparent);
  box-shadow: 0 0 16px #38bdf8, 0 0 8px #06b6d4;
  animation: laserScan 2.2s infinite alternate ease-in-out;
  pointer-events: none;
  z-index: 10;
}

@keyframes laserScan {
  0% { top: 12%; opacity: 0.9; }
  50% { opacity: 1; }
  100% { top: 88%; opacity: 0.9; }
}

.scanner-target-corners {
  position: absolute;
  width: 190px;
  height: 190px;
  border: 2px dashed rgba(56, 189, 248, 0.7);
  border-radius: 20px;
  box-shadow: inset 0 0 20px rgba(56, 189, 248, 0.18), 0 0 15px rgba(56, 189, 248, 0.15);
  pointer-events: none;
  z-index: 5;
}

.scanner-loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(4, 7, 17, 0.94);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  z-index: 20;
  padding: 20px;
  text-align: center;
}

.scanner-controls-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}

.scanner-ctrl-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 14px;
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-lg);
  color: #ffffff;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.scanner-ctrl-btn:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: #38bdf8;
  color: #38bdf8;
  transform: translateY(-1px);
}

.scanner-ctrl-btn.active {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.3), rgba(37, 99, 235, 0.2));
  border-color: #38bdf8;
  color: #38bdf8;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
}

.scanner-manual-toggle-btn {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-lg);
  color: #38bdf8;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.scanner-manual-toggle-btn:hover {
  background: rgba(56, 189, 248, 0.12);
  border-color: #38bdf8;
  border-style: solid;
  color: #ffffff;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
}

.scanner-manual-box {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-lg);
  padding: 14px;
  margin-top: 10px;
  animation: fadeIn 0.2s ease;
}

.gps-permission-banner {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  margin-bottom: 16px;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.gps-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
}

.gps-status-pill.ready {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
}

.gps-status-pill.acquiring {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
}

/* ==========================================================================
   ADMIN WEB PANEL INTERFACE
   ========================================================================== */
.admin-layout {
  display: flex;
  min-height: 100vh;
  background: var(--bg-main);
}

/* Sidebar */
.admin-sidebar {
  width: var(--sidebar-width);
  background: var(--bg-glass-strong);
  backdrop-filter: blur(20px);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: 22px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-menu {
  flex: 1;
  padding: 18px 12px;
  overflow-y: auto;
}

.sidebar-group-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 1px;
  padding: 12px 14px 6px;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 4px;
  transition: all 0.2s ease;
  background: transparent;
  width: 100%;
  text-align: left;
}

.sidebar-item:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.sidebar-item.active {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.sidebar-item svg {
  width: 18px;
  height: 18px;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-color);
}

/* Admin Main Content Wrapper */
.admin-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  min-width: 0;
  max-width: calc(100vw - var(--sidebar-width));
  overflow-x: hidden;
  box-sizing: border-box;
}

.admin-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  box-sizing: border-box;
  width: 100%;
}

.admin-page-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.25;
}

.admin-body,
.admin-content {
  padding: 26px 28px 40px;
  flex: 1;
  width: 100%;
  box-sizing: border-box;
}

/* Dashboard Analytics Cards Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
  margin-bottom: 26px;
}

.metric-card {
  padding: 20px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 16px;
}

.metric-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.metric-info h3 {
  font-size: 24px;
  font-weight: 800;
}

.metric-info p {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Data Tables */
.table-container {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

.data-table th {
  padding: 14px 18px;
  background: var(--bg-input);
  font-weight: 700;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.data-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  white-space: nowrap;
}

.data-table tbody tr:hover {
  background: var(--bg-card-hover);
}

/* Batch Badges */
.batch-badge {
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
}

.batch-badge.batch-1 {
  background: rgba(37, 99, 235, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.batch-badge.batch-2 {
  background: rgba(139, 92, 246, 0.15);
  color: #a78bfa;
  border: 1px solid rgba(139, 92, 246, 0.3);
}

/* Modals */
.modal-backdrop,
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  animation: fadeIn 0.2s ease;
  overflow-y: auto;
}

.modal-card,
.modal-content {
  width: 100%;
  max-width: 520px;
  background: var(--bg-modal);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  margin: auto;
  position: relative;
}

/* ==========================================================================
   ATTENDANCE CONFIRMATION LAYOUT ARCHITECTURE (CENTERED, BALANCED & RESPONSIVE)
   ========================================================================== */
.attendance-confirm-overlay {
  position: fixed !important;
  inset: 0 !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  min-height: 100vh !important;
  min-height: 100dvh !important;
  background: rgba(10, 14, 23, 0.82) !important;
  backdrop-filter: blur(12px) !important;
  -webkit-backdrop-filter: blur(12px) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  z-index: 9999 !important;
  padding: 24px !important;
  overflow-y: auto !important;
  box-sizing: border-box !important;
  animation: fadeIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.attendance-confirm-container {
  width: 100% !important;
  max-width: 600px !important;
  margin: 0 auto !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  justify-content: center !important;
  box-sizing: border-box !important;
}

/* Multi-card grid support (utilizes available desktop width cleanly) */
.attendance-confirm-grid {
  display: grid !important;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)) !important;
  gap: 24px !important;
  width: 100% !important;
  max-width: 1140px !important;
  margin: 0 auto !important;
  justify-content: center !important;
  align-items: start !important;
  box-sizing: border-box !important;
}

.attendance-confirm-card {
  width: 100% !important;
  max-width: 580px !important;
  margin: 0 auto !important;
  background: var(--bg-card, #111827) !important;
  border: 1px solid rgba(56, 189, 248, 0.35) !important;
  border-radius: 20px !important;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 30px rgba(56, 189, 248, 0.15) !important;
  padding: 28px 24px !important;
  text-align: center !important;
  box-sizing: border-box !important;
  position: relative !important;
}

[data-theme="light"] .attendance-confirm-overlay {
  background: rgba(15, 23, 42, 0.6) !important;
}

[data-theme="light"] .attendance-confirm-card {
  background: #ffffff !important;
  border: 1px solid #cbd5e1 !important;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.12), 0 0 25px rgba(56, 189, 248, 0.1) !important;
  color: #0f172a !important;
}

@media (max-width: 768px) {
  .attendance-confirm-overlay {
    padding: 12px !important;
    align-items: flex-end !important;
  }
  .attendance-confirm-card {
    max-width: 100% !important;
    padding: 22px 16px !important;
    border-radius: 18px 18px 0 0 !important;
  }
  .attendance-confirm-grid {
    grid-template-columns: 1fr !important;
  }
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 24px;
  max-height: 80vh;
  overflow-y: auto;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ==========================================================================
   TEACHER & FACULTY PORTAL STYLES (3CYBER7)
   ========================================================================== */
.teacher-layout {
  display: flex;
  min-height: 100vh;
  background: var(--bg-main);
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  box-sizing: border-box;
}

.card:hover {
  border-color: var(--border-color-hover);
}

.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

@media (max-width: 1100px) {
  .admin-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .admin-stats-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

.stat-card {
  position: relative;
  background: linear-gradient(145deg, rgba(18, 24, 38, 0.95) 0%, rgba(11, 16, 28, 0.85) 100%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-sizing: border-box;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: transparent;
  transition: background 0.25s ease;
}

.stat-card.stat-card-cyan::before { background: linear-gradient(90deg, #06b6d4, #3b82f6); }
.stat-card.stat-card-purple::before { background: linear-gradient(90deg, #8b5cf6, #ec4899); }
.stat-card.stat-card-emerald::before { background: linear-gradient(90deg, #10b981, #06b6d4); }
.stat-card.stat-card-amber::before { background: linear-gradient(90deg, #f59e0b, #ef4444); }

.stat-card:hover {
  border-color: rgba(56, 189, 248, 0.35);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35), 0 0 20px rgba(56, 189, 248, 0.12);
}

.stat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.stat-title {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.stat-icon-wrap {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: transform 0.2s ease;
}

.stat-card:hover .stat-icon-wrap {
  transform: scale(1.08);
}

.stat-icon-cyan {
  background: rgba(6, 182, 212, 0.15);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: #38bdf8;
}

.stat-icon-purple {
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: #a78bfa;
}

.stat-icon-emerald {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
}

.stat-icon-amber {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: #fbbf24;
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  font-family: var(--font-heading);
  line-height: 1.1;
  letter-spacing: -0.5px;
}

.stat-desc {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  color: var(--text-primary);
}

.table th {
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
  white-space: nowrap;
}

.table td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  vertical-align: middle;
}

.table tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.btn-status-pill {
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  border: 1px solid var(--border-color);
  background: var(--bg-input);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-status-pill:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.btn-status-pill.active-present {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.5);
}

.btn-status-pill.active-absent {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.5);
}

.btn-status-pill.active-leave {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.5);
}

.marks-score-input {
  width: 75px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-weight: 700;
  text-align: center;
  font-size: 13px;
  transition: border-color 0.2s ease;
}

.marks-score-input:focus {
  border-color: #38bdf8;
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.marks-remarks-input {
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 12px;
  width: 100%;
  box-sizing: border-box;
}

.grade-badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 11px;
  letter-spacing: 0.5px;
}

.grade-badge.grade-A { background: rgba(16, 185, 129, 0.2); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.4); }
.grade-badge.grade-B { background: rgba(56, 189, 248, 0.2); color: #38bdf8; border: 1px solid rgba(56, 189, 248, 0.4); }
.grade-badge.grade-C { background: rgba(245, 158, 11, 0.2); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.4); }
.grade-badge.grade-F { background: rgba(239, 68, 68, 0.2); color: #f87171; border: 1px solid rgba(239, 68, 68, 0.4); }

.teacher-row {
  transition: background 0.2s ease;
}

.teacher-row:hover {
  background: rgba(255, 255, 255, 0.03);
}

.modal-box {
  background: var(--bg-modal);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 560px;
  width: 90%;
  padding: 24px;
  box-sizing: border-box;
}

.manual-remark-input {
  padding: 5px 8px;
  font-size: 11.5px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  width: 100%;
  box-sizing: border-box;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: slideInRight 0.3s ease;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 360px;
}

.toast.success { background: #059669; }
.toast.error { background: #dc2626; }
.toast.info { background: #2563eb; }

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Timetable Day Scroll Carousel */
.day-scroll-wrapper {
  position: relative;
  margin-bottom: 18px;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
}

.scroll-arrow-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
  z-index: 2;
  user-select: none;
}

.scroll-arrow-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  color: #38bdf8;
  transform: scale(1.08);
}

.scroll-arrow-btn:active {
  transform: scale(0.95);
}

.day-scroll-container {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: rgba(56, 189, 248, 0.35) transparent;
  padding: 4px 2px 10px 2px;
  white-space: nowrap;
  touch-action: pan-x;
  flex: 1;
  width: 100%;
  min-width: 0;
  scroll-behavior: smooth;
  cursor: grab;
}

.day-scroll-container:active {
  cursor: grabbing;
}

.day-scroll-container::-webkit-scrollbar {
  height: 4px;
}

.day-scroll-container::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 4px;
}

.day-scroll-container::-webkit-scrollbar-thumb {
  background: rgba(56, 189, 248, 0.35);
  border-radius: 4px;
}

.day-scroll-container::-webkit-scrollbar-thumb:hover {
  background: rgba(56, 189, 248, 0.7);
}

.day-pill-btn {
  flex: 0 0 auto;
  scroll-snap-align: center;
  min-width: 105px;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
}

.day-pill-btn:hover {
  background: var(--bg-card-hover);
  border-color: rgba(56, 189, 248, 0.4);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.day-pill-btn.active {
  background: var(--primary-gradient);
  border-color: rgba(56, 189, 248, 0.6);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.5);
  transform: scale(1.02);
}

/* File Format Badges & Icons */
.format-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.format-badge.pdf {
  background: rgba(239, 68, 68, 0.18);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.35);
}
.format-badge.xlsx, .format-badge.xls {
  background: rgba(16, 185, 129, 0.18);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.35);
}
.format-badge.docx, .format-badge.doc {
  background: rgba(59, 130, 246, 0.18);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.35);
}
.format-badge.pptx, .format-badge.ppt {
  background: rgba(245, 158, 11, 0.18);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.35);
}
.format-badge.txt, .format-badge.csv {
  background: rgba(168, 85, 247, 0.18);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.35);
}
.format-badge.zip, .format-badge.rar {
  background: rgba(236, 72, 153, 0.18);
  color: #f472b6;
  border: 1px solid rgba(236, 72, 153, 0.35);
}

/* ==========================================================================
   SUBJECT-BASED STUDY HUB
   ========================================================================== */
.subject-carousel-wrapper {
  position: relative;
  margin-bottom: 18px;
  width: 100%;
}

.subject-carousel-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 4px 4px 12px 4px;
  white-space: nowrap;
}

.subject-carousel-tabs::-webkit-scrollbar {
  display: none;
}

.subject-filter-pill {
  flex: 0 0 auto;
  padding: 9px 18px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
  transition: all 0.2s ease;
  cursor: pointer;
}

.subject-filter-pill:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
}

.subject-filter-pill.active {
  background: var(--secondary-gradient);
  border-color: rgba(6, 182, 212, 0.5);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.3);
}

.subject-column-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.subject-column-card:hover {
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-md);
}

.subject-header-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
}

.subject-code-tag {
  font-size: 11px;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(37, 99, 235, 0.2);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.subject-title-box h3 {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 4px;
}

.subject-title-box p {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.subject-stats-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.subject-stat-chip {
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.subject-stat-chip strong {
  color: var(--accent-cyan);
}

.subject-inner-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  background: var(--bg-input);
  padding: 4px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  scrollbar-width: none;
}

.subject-inner-tabs::-webkit-scrollbar {
  display: none;
}

.subject-inner-tab-btn {
  flex: 1;
  min-width: 75px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 700;
  text-align: center;
  background: transparent;
  color: var(--text-muted);
  transition: all 0.2s ease;
  white-space: nowrap;
  cursor: pointer;
}

.subject-inner-tab-btn.active {
  background: var(--bg-card);
  color: #38bdf8;
  box-shadow: var(--shadow-sm);
}

.subject-resource-card {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  margin-bottom: 10px;
  transition: all 0.2s ease;
}

.subject-resource-card:hover {
  border-color: rgba(56, 189, 248, 0.3);
}

.empty-resource-box {
  padding: 24px 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  background: rgba(15, 23, 42, 0.4);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-color);
}

/* Responsive Grid Utilities for Admin and Forms */
.admin-grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.admin-grid-1to2col {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 20px;
}

.modal-grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.modal-card-chat {
  max-width: 540px;
  height: 85vh;
  height: 85dvh;
  max-height: calc(100dvh - 24px);
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS (TABLET, MOBILE, COMPACT)
   ========================================================================== */
@media (max-width: 900px) {
  .admin-sidebar {
    transform: translateX(-100%);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.8);
  }
  .admin-sidebar.open {
    transform: translateX(0);
  }
  .admin-sidebar-backdrop,
  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 95;
  }
  .admin-sidebar-backdrop.open,
  .admin-sidebar-backdrop.show,
  .sidebar-backdrop.open,
  .sidebar-backdrop.show {
    display: block;
  }
  .admin-main {
    margin-left: 0;
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
  }
  #btn-toggle-sidebar,
  #teacher-sidebar-toggle {
    display: flex !important;
  }
  .admin-topbar {
    padding: 12px 16px;
  }
  .admin-body,
  .admin-content {
    padding: 16px 14px 40px;
  }
  .admin-grid-2col,
  .admin-grid-1to2col {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (max-width: 768px) {
  /* Prevent iOS Safari viewport shifting caused by auto-zoom on input focus */
  input[type="text"],
  input[type="password"],
  input[type="email"],
  input[type="number"],
  input[type="url"],
  input[type="date"],
  input[type="time"],
  select,
  textarea,
  .form-control,
  .form-input {
    font-size: 16px !important;
  }

  /* Full-width responsive container */
  .student-app-layout {
    max-width: 100%;
    width: 100%;
  }

  /* Tables horizontal scrolling safely contained */
  .table-container,
  .admin-table-wrapper,
  .excel-preview-table-box {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
  }

  .table,
  .data-table {
    min-width: 520px;
  }

  .admin-stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .results-score-banner {
    grid-template-columns: repeat(3, 1fr);
    padding: 12px 10px;
    gap: 8px;
  }

  .card,
  .panel-card {
    padding: 16px;
  }
}

@media (max-width: 600px) {
  .auth-card {
    padding: 24px 18px;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
  }
  .auth-title {
    font-size: 18px;
  }
  .metric-card {
    padding: 16px;
  }
  .metric-icon {
    width: 44px;
    height: 44px;
    font-size: 20px;
  }
  .metric-info h3 {
    font-size: 20px;
  }
}

@media (max-width: 480px) {
  .student-topbar {
    padding: max(10px, var(--safe-top)) 12px 10px;
  }
  .brand-crest {
    width: 34px;
    height: 34px;
  }
  .brand-crest svg {
    width: 18px;
    height: 18px;
  }
  .brand-text h1 {
    font-size: 13px;
  }
  .brand-text span {
    font-size: 10px;
  }
  .topbar-actions {
    gap: 5px;
  }
  .icon-btn {
    width: 34px;
    height: 34px;
  }
  .student-content {
    padding: 12px 12px 28px;
  }
  .greeting-hero {
    padding: 16px;
    border-radius: var(--radius-lg);
  }
  .greeting-text h2 {
    font-size: 16.5px;
  }
  .student-meta-chips {
    gap: 6px;
  }
  .meta-chip {
    padding: 3px 8px;
    font-size: 10.5px;
  }
  .next-class-card {
    padding: 14px 16px;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .quick-actions-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
  }
  .action-card {
    padding: 10px 4px;
  }
  .action-icon {
    width: 34px;
    height: 34px;
    font-size: 16px;
    margin-bottom: 5px;
  }
  .action-label {
    font-size: 9.5px;
  }
  .quick-stats-row {
    gap: 8px;
  }
  .stat-box {
    padding: 12px;
    gap: 10px;
  }
  .stat-ring {
    width: 42px;
    height: 42px;
    font-size: 11px;
  }
  .stat-ring::before {
    width: 32px;
    height: 32px;
  }
  .stat-info h4 {
    font-size: 15px;
  }
  .day-scroll-wrapper {
    gap: 4px;
  }
  .scroll-arrow-btn {
    width: 28px;
    height: 28px;
    font-size: 16px;
  }
  .day-pill-btn {
    min-width: 80px;
    padding: 7px 12px;
    font-size: 11.5px;
  }
  .modal-backdrop {
    padding: 10px;
  }
  .modal-card,
  .modal-box {
    max-width: calc(100vw - 20px) !important;
    width: calc(100vw - 20px) !important;
    max-height: calc(100dvh - 24px) !important;
    border-radius: var(--radius-lg);
    padding: 16px !important;
    box-sizing: border-box;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .modal-header {
    padding: 14px 16px;
  }
  .modal-body {
    padding: 16px;
  }
  .modal-footer {
    padding: 12px 16px;
  }
  .modal-grid-2col {
    grid-template-columns: 1fr;
  }
  .subject-header-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .subject-stats-bar {
    gap: 4px;
  }
  .subject-stat-chip {
    padding: 3px 7px;
    font-size: 10px;
  }
  .toast-container {
    left: 12px;
    right: 12px;
    top: 12px;
  }
  .toast {
    max-width: calc(100vw - 24px);
    font-size: 13px;
  }
  .admin-stats-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .stat-card {
    padding: 14px 16px;
  }
  .stat-value {
    font-size: 22px;
  }
  .results-score-banner {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .admin-topbar {
    padding: 10px 14px;
    flex-wrap: wrap;
    gap: 8px;
  }
  .admin-page-title {
    font-size: 15px;
  }
  .table,
  .data-table {
    min-width: 460px;
  }
}

@media (max-width: 360px) {
  .brand-text span {
    display: none;
  }
  .auth-card {
    padding: 18px 12px;
    border-radius: var(--radius-md);
  }
  .auth-title {
    font-size: 16px;
  }
  .auth-subtitle {
    font-size: 11px;
  }
  .auth-badge {
    font-size: 9.5px;
    padding: 2px 6px;
  }
  .btn-primary,
  .btn-sec,
  .btn-secondary {
    font-size: 12px;
    padding: 8px 12px;
  }
  .quick-actions-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 6px;
  }
  .action-card {
    padding: 8px 4px;
  }
  .action-icon {
    width: 30px;
    height: 30px;
    font-size: 14px;
  }
  .action-label {
    font-size: 9px;
  }
  .bottom-nav-bar {
    padding: 2px 4px;
    height: 60px;
  }
  .bottom-nav-item {
    font-size: 9px;
    padding: 2px 1px;
    gap: 2px;
  }
  .bottom-nav-item svg {
    width: 16px;
    height: 16px;
  }
  .table,
  .data-table {
    min-width: 400px;
  }
}

/* Additional Utility & Toggle Button Styles */
.status-toggle-btn {
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 700;
  background: var(--bg-input);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
  cursor: pointer;
}

.status-toggle-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.status-toggle-btn.active-present {
  background: rgba(16, 185, 129, 0.25);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.5);
}

.status-toggle-btn.active-absent {
  background: rgba(239, 68, 68, 0.25);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.5);
}

.status-toggle-btn.active-leave {
  background: rgba(245, 158, 11, 0.25);
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.5);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn-link {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  display: inline-flex;
  align-items: center;
}

/* ==========================================================================
   RESPONSIVE DATA TABLES & MARKSHEET SYSTEM
   ========================================================================== */
.table-container {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-md);
  margin-top: 8px;
}

.data-table {
  width: 100%;
  min-width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
  color: var(--text-primary);
}

.data-table th {
  padding: 10px 14px;
  background: var(--bg-input);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  vertical-align: middle;
  word-break: break-word;
}

.data-table tbody tr:hover {
  background: var(--bg-card-hover);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* Marksheet Result Cards for Mobile & Web */
.results-score-banner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 16px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.12) 0%, rgba(99, 102, 241, 0.12) 100%);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  text-align: center;
}

.results-score-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.results-score-label {
  font-size: 10.5px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.results-score-val {
  font-size: 20px;
  font-weight: 900;
  color: var(--text-primary);
  margin-top: 2px;
  font-family: var(--font-heading);
}

.subject-mark-card {
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.subject-mark-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-1px);
}

.subject-mark-info {
  flex: 1;
  min-width: 0;
}

.subject-mark-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.subject-mark-exam {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

.subject-mark-score {
  text-align: right;
  white-space: nowrap;
}

.subject-mark-points {
  font-size: 15px;
  font-weight: 800;
  color: #38bdf8;
}

.subject-mark-max {
  font-size: 11px;
  color: var(--text-muted);
}

/* ==========================================================================
   BIOMETRIC FACE SCAN ATTENDANCE STYLES
   ========================================================================== */
.face-scan-viewport {
  position: relative;
  width: 100%;
  max-width: 340px;
  height: 380px;
  margin: 0 auto;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: #000000;
  box-shadow: 0 0 35px rgba(6, 182, 212, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.face-scan-viewport video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1); /* Mirror view for natural selfie camera */
}

.face-scan-overlay-oval {
  position: absolute;
  width: 220px;
  height: 280px;
  border: 3px dashed #38bdf8;
  border-radius: 50% 50% 45% 45% / 60% 60% 40% 40%;
  pointer-events: none;
  box-shadow: 0 0 0 9999px rgba(10, 14, 23, 0.65);
  animation: pulse-oval 2s ease-in-out infinite;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

@keyframes pulse-oval {
  0%, 100% { border-color: #38bdf8; box-shadow: 0 0 0 9999px rgba(10, 14, 23, 0.65), 0 0 15px rgba(56, 189, 248, 0.4); }
  50% { border-color: #34d399; box-shadow: 0 0 0 9999px rgba(10, 14, 23, 0.65), 0 0 25px rgba(52, 211, 153, 0.5); }
}

.face-scan-laser-line {
  position: absolute;
  left: 10%;
  right: 10%;
  height: 3px;
  background: linear-gradient(90deg, transparent, #38bdf8, #34d399, transparent);
  box-shadow: 0 0 12px #38bdf8;
  animation: scan-face-sweep 2.2s cubic-bezier(0.4, 0, 0.2, 1) infinite alternate;
  pointer-events: none;
}

@keyframes scan-face-sweep {
  0% { top: 15%; opacity: 0.8; }
  100% { top: 85%; opacity: 1; }
}

.face-landmarks-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(56, 189, 248, 0.3) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.4;
}

.dual-attendance-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 14px;
}

@media (max-width: 480px) {
  .dual-attendance-grid {
    grid-template-columns: 1fr;
  }
}

.attendance-mode-card {
  padding: 18px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.attendance-mode-card:hover {
  border-color: #38bdf8;
  transform: translateY(-2px);
  background: var(--bg-card-hover);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.2);
}

.attendance-mode-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 4px;
}

/* ==========================================================================
   EXCEL BULK UPLOAD DROPZONE STYLES
   ========================================================================== */
.excel-dropzone {
  border: 2px dashed rgba(56, 189, 248, 0.4);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  background: rgba(15, 23, 42, 0.5);
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
}

.excel-dropzone:hover, .excel-dropzone.dragover {
  border-color: #38bdf8;
  background: rgba(56, 189, 248, 0.08);
  box-shadow: 0 0 25px rgba(6, 182, 212, 0.25);
}

.excel-preview-table-box {
  margin-top: 18px;
  padding: 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  max-height: 380px;
  overflow-y: auto;
}

/* ==========================================================================
   LIGHT THEME DESIGN SYSTEM & HIGH-CONTRAST OVERRIDES
   ========================================================================== */
[data-theme="light"] {
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.9);
  --bg-glass-strong: rgba(255, 255, 255, 0.96);
  --bg-input: #f1f5f9;
  --bg-modal: #ffffff;

  --border-color: #e2e8f0;
  --border-color-hover: #3b82f6;
  --border-glass: #cbd5e1;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
}

/* Light Theme Layout & Navigation */
[data-theme="light"] body {
  background-color: #f8fafc;
  color: #0f172a;
}

[data-theme="light"] .admin-layout {
  background: #f8fafc;
}

[data-theme="light"] .admin-sidebar {
  background: #ffffff;
  border-right: 1px solid #e2e8f0;
  box-shadow: 2px 0 16px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .sidebar-header {
  border-bottom: 1px solid #e2e8f0;
}

[data-theme="light"] .sidebar-header h2 {
  color: #0f172a;
}

[data-theme="light"] .sidebar-footer {
  border-top: 1px solid #e2e8f0;
}

[data-theme="light"] .sidebar-group-title {
  color: #64748b;
}

[data-theme="light"] .sidebar-item {
  color: #475569;
}

[data-theme="light"] .sidebar-item:hover {
  background: #f1f5f9;
  color: #0f172a;
}

[data-theme="light"] .sidebar-item.active {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

[data-theme="light"] .admin-topbar,
[data-theme="light"] .student-topbar {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid #e2e8f0;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] #admin-page-title,
[data-theme="light"] .brand-text h1 {
  color: #0f172a;
}

[data-theme="light"] .brand-text span {
  color: #0284c7;
}

[data-theme="light"] .bottom-nav-bar {
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid #e2e8f0;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .bottom-nav-item {
  color: #64748b;
}

[data-theme="light"] .bottom-nav-item.active {
  color: #2563eb;
}

[data-theme="light"] .bottom-nav-item.active svg {
  stroke: #2563eb;
}

/* Light Theme Greeting Hero & Next Class Card */
[data-theme="light"] .greeting-hero {
  background: linear-gradient(135deg, #1d4ed8 0%, #2563eb 50%, #0284c7 100%);
  border: 1px solid rgba(37, 99, 235, 0.2);
  box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.25);
  color: #ffffff;
}

[data-theme="light"] .greeting-text h2 {
  color: #ffffff;
}

[data-theme="light"] .greeting-text p {
  color: #e0f2fe;
}

[data-theme="light"] .student-tag-badge {
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.45);
  color: #ffffff;
}

[data-theme="light"] .meta-chip {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #f8fafc;
}

[data-theme="light"] .meta-chip strong {
  color: #ffffff;
}

[data-theme="light"] .next-class-card {
  background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
  border: 1px solid #86efac;
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.1);
}

[data-theme="light"] .next-class-subject {
  color: #0f172a;
}

[data-theme="light"] .next-class-details {
  color: #475569;
}

[data-theme="light"] .class-status-badge.live {
  background: #e0f2fe;
  color: #0369a1;
  border: 1px solid #7dd3fc;
}

[data-theme="light"] .class-status-badge.upcoming {
  background: #fef3c7;
  color: #b45309;
  border: 1px solid #fcd34d;
}

/* Light Theme Cards, Stats & Rings */
[data-theme="light"] .stat-box {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .stat-ring {
  background: conic-gradient(var(--status-present) calc(var(--percent, 85) * 1%), #e2e8f0 0);
}

[data-theme="light"] .stat-ring::before {
  background: #ffffff;
}

[data-theme="light"] .stat-ring span {
  color: #0f172a;
}

[data-theme="light"] .stat-info h4 {
  color: #0f172a;
}

[data-theme="light"] .stat-info p {
  color: #64748b;
}

[data-theme="light"] .metric-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .metric-info h3 {
  color: #0f172a;
}

[data-theme="light"] .metric-info p {
  color: #64748b;
}

[data-theme="light"] .action-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .action-card:hover {
  background: #f8fafc;
  border-color: #3b82f6;
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.12);
}

[data-theme="light"] .action-label {
  color: #1e293b;
}

/* Light Theme Schedules & Carousels */
[data-theme="light"] .schedule-item-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .schedule-item-card:hover {
  border-color: #cbd5e1;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .schedule-item-card.is-live {
  background: #f0fdf4;
  border-color: #34d399;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.12);
}

[data-theme="light"] .schedule-time-box {
  background: #f1f5f9;
  color: #334155;
  border: 1px solid #e2e8f0;
}

[data-theme="light"] .schedule-title {
  color: #0f172a;
}

[data-theme="light"] .schedule-meta {
  color: #64748b;
}

[data-theme="light"] .lab-chip {
  background: #ede9fe;
  color: #6d28d9;
  border: 1px solid #c4b5fd;
}

[data-theme="light"] .day-pill-btn {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  color: #475569;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .day-pill-btn:hover {
  background: #f8fafc;
  border-color: #38bdf8;
  color: #0f172a;
}

[data-theme="light"] .day-pill-btn.active {
  background: var(--primary-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

[data-theme="light"] .scroll-arrow-btn {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  color: #334155;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .scroll-arrow-btn:hover {
  background: #f8fafc;
  border-color: #38bdf8;
  color: #0284c7;
}

/* Light Theme Study Hub & Subject Column Cards */
[data-theme="light"] .subject-filter-pill {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  color: #475569;
}

[data-theme="light"] .subject-filter-pill:hover {
  border-color: #38bdf8;
  color: #0f172a;
}

[data-theme="light"] .subject-filter-pill.active {
  background: var(--secondary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.3);
}

[data-theme="light"] .subject-column-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .subject-code-tag {
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
}

[data-theme="light"] .subject-title-box h3 {
  color: #0f172a;
}

[data-theme="light"] .subject-title-box p {
  color: #64748b;
}

[data-theme="light"] .subject-stats-bar {
  border-bottom: 1px solid #e2e8f0;
}

[data-theme="light"] .subject-stat-chip {
  background: #f1f5f9;
  color: #475569;
  border: 1px solid #e2e8f0;
}

[data-theme="light"] .subject-stat-chip strong {
  color: #0284c7;
}

[data-theme="light"] .subject-inner-tabs {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
}

[data-theme="light"] .subject-inner-tab-btn {
  color: #64748b;
}

[data-theme="light"] .subject-inner-tab-btn.active {
  background: #ffffff;
  color: #0284c7;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .subject-resource-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
}

[data-theme="light"] .subject-resource-card:hover {
  background: #ffffff;
  border-color: #93c5fd;
}

[data-theme="light"] .empty-resource-box {
  background: #f8fafc;
  border: 1px dashed #cbd5e1;
  color: #64748b;
}

/* Light Theme Tables & Data Containers */
[data-theme="light"] .table-container {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .data-table {
  color: #1e293b;
}

[data-theme="light"] .data-table th {
  background: #f8fafc;
  color: #475569;
  border-bottom: 1px solid #e2e8f0;
}

[data-theme="light"] .data-table td {
  border-bottom: 1px solid #f1f5f9;
  color: #1e293b;
}

[data-theme="light"] .data-table tbody tr:hover {
  background: #f8fafc;
}

[data-theme="light"] .batch-badge.batch-1 {
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
}

[data-theme="light"] .batch-badge.batch-2 {
  background: #f5f3ff;
  color: #6d28d9;
  border: 1px solid #ddd6fe;
}

/* Light Theme Form Controls, Inputs & Buttons */
[data-theme="light"] .form-control {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  color: #0f172a;
}

[data-theme="light"] .form-control:focus {
  background: #ffffff;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

[data-theme="light"] .input-icon {
  color: #64748b;
}

[data-theme="light"] .form-label {
  color: #334155;
}

[data-theme="light"] .icon-btn {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  color: #334155;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .icon-btn:hover {
  background: #f8fafc;
  color: #2563eb;
  border-color: #cbd5e1;
}

[data-theme="light"] .status-toggle-btn {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  color: #475569;
}

[data-theme="light"] .status-toggle-btn:hover {
  background: #f8fafc;
  color: #0f172a;
}

[data-theme="light"] .status-toggle-btn.active-present {
  background: #dcfce7;
  color: #15803d;
  border-color: #86efac;
}

[data-theme="light"] .status-toggle-btn.active-absent {
  background: #fee2e2;
  color: #b91c1c;
  border-color: #fca5a5;
}

[data-theme="light"] .status-toggle-btn.active-leave {
  background: #fef3c7;
  color: #b45309;
  border-color: #fcd34d;
}

/* Light Theme Modals & Dialogs */
[data-theme="light"] .modal-backdrop,
[data-theme="light"] .modal-overlay {
  background: rgba(15, 23, 42, 0.55);
}

[data-theme="light"] .modal-card,
[data-theme="light"] .modal-content {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.15);
  color: #0f172a;
}

[data-theme="light"] .modal-header {
  border-bottom: 1px solid #e2e8f0;
}

[data-theme="light"] .modal-header h3 {
  color: #0f172a;
}

[data-theme="light"] .modal-body {
  color: #334155;
}

[data-theme="light"] .modal-footer {
  border-top: 1px solid #e2e8f0;
}

/* Light Theme Marksheets & Results */
[data-theme="light"] .results-score-banner {
  background: linear-gradient(135deg, #e0f2fe 0%, #e0e7ff 100%);
  border: 1px solid #bae6fd;
}

[data-theme="light"] .results-score-label {
  color: #0369a1;
}

[data-theme="light"] .results-score-val {
  color: #1e3a8a;
}

[data-theme="light"] .subject-mark-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .subject-mark-card:hover {
  border-color: #93c5fd;
}

[data-theme="light"] .subject-mark-title {
  color: #0f172a;
}

[data-theme="light"] .subject-mark-exam {
  color: #64748b;
}

[data-theme="light"] .subject-mark-points {
  color: #0284c7;
}

[data-theme="light"] .subject-mark-max {
  color: #64748b;
}

/* Light Theme General Utilities & Misc Cards */
[data-theme="light"] .glass-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .attendance-mode-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .attendance-mode-card:hover {
  background: #f8fafc;
  border-color: #3b82f6;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.12);
}

[data-theme="light"] .excel-dropzone {
  background: #f8fafc;
  border: 2px dashed #94a3b8;
}

[data-theme="light"] .excel-dropzone:hover,
[data-theme="light"] .excel-dropzone.dragover {
  background: #eff6ff;
  border-color: #3b82f6;
}

[data-theme="light"] .excel-preview-table-box {
  background: #ffffff;
  border: 1px solid #e2e8f0;
}

[data-theme="light"] .auth-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .auth-toggle-tabs {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
}

[data-theme="light"] .auth-toggle-btn {
  color: #475569;
}

[data-theme="light"] .auth-toggle-btn.active {
  background: var(--primary-gradient);
  color: #ffffff;
}

/* Light Theme Teacher & Custom Controls */
[data-theme="light"] .btn-sec,
[data-theme="light"] .btn-secondary {
  background: #ffffff;
  border-color: #cbd5e1;
  color: #334155;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .btn-sec:hover,
[data-theme="light"] .btn-secondary:hover {
  background: #f1f5f9;
  border-color: #94a3b8;
  color: #0f172a;
}

[data-theme="light"] .card,
[data-theme="light"] .stat-card {
  background: #ffffff;
  border-color: #e2e8f0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .stat-value,
[data-theme="light"] .admin-page-title {
  color: #0f172a;
}

[data-theme="light"] .stat-desc {
  color: #64748b;
}

[data-theme="light"] .marks-score-input,
[data-theme="light"] .marks-remarks-input,
[data-theme="light"] .manual-remark-input,
[data-theme="light"] .form-input {
  background: #ffffff;
  border-color: #cbd5e1;
  color: #0f172a;
}

[data-theme="light"] .btn-status-pill {
  background: #ffffff;
  border-color: #e2e8f0;
  color: #475569;
}

[data-theme="light"] .modal-box {
  background: #ffffff;
  border-color: #e2e8f0;
}

[data-theme="light"] .btn-table-action {
  background: #ffffff;
  border-color: #cbd5e1;
  color: #334155;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .btn-table-action:hover {
  background: #f1f5f9;
  border-color: #94a3b8;
  color: #0f172a;
}

[data-theme="light"] .btn-table-action.btn-action-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.35);
  color: #b45309;
}

[data-theme="light"] .btn-table-action.btn-action-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.35);
  color: #047857;
}

[data-theme="light"] .btn-table-action.btn-action-danger {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.35);
  color: #b91c1c;
}

[data-theme="light"] .stat-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-top: 1px solid #cbd5e1;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .stat-card:hover {
  border-color: #94a3b8;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
}