@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&display=swap');

/* --- DESIGN TOKENS --- */
:root {
  --bg-base: #F5F3FF;
  --bg-base-2: #E2E8F0;
  --bg: #F8FAFC;
  --card-bg: #FFFFFF;
  --card-border: rgba(15, 23, 42, 0.08);
  --border: rgba(15, 23, 42, 0.12);

  --text-primary: #0F172A;
  --text-muted: #64748B;
  --muted: #64748B;
  --navy: #1E293B;

  --violet: #7C6CF0;
  --violet-2: #9F8BFF;
  --teal: #06D6A0;
  --teal-glow: rgba(6, 214, 160, 0.28);
  --accent-glow: rgba(124, 108, 240, 0.30);
  --danger: #EF4444;
  --success: #10B981;

  --shadow: 0 20px 45px -18px rgba(31, 22, 90, 0.22);
  --glass-blur: blur(18px);

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;

  /* Motion tokens — centralized so the whole app eases the same way */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast: 0.15s;
  --dur-med: 0.28s;
  --dur-slow: 0.45s;
}

[data-theme="dark"] {
  --bg-base: #0A0B14;
  --bg-base-2: #15182B;
  --bg: #111424;
  --card-bg: #181B2E;
  --card-border: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.12);

  --text-primary: #FFFFFF;
  --text-muted: #94A3B8;
  --muted: #94A3B8;
  --navy: #E2E8F0;

  --violet: #7C6CF0;
  --violet-2: #9F8BFF;
  --teal: #06D6A0;
  --teal-glow: rgba(6, 214, 160, 0.24);
  --accent-glow: rgba(124, 108, 240, 0.32);
  --danger: #EF4444;
  --success: #10B981;

  --shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.65);
}

/* --- AURORA BACKGROUND MESH (light theme only, very subtle) --- */
body {
  position: relative;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--dur-med) ease, color var(--dur-med) ease;
}

/* GPU-only pseudo-element: two large radial gradients that drift slowly */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 40% at 15% 20%, var(--teal-glow) 0%, transparent 70%),
    radial-gradient(ellipse 50% 35% at 85% 75%, var(--accent-glow) 0%, transparent 70%);
  animation: auroraDrift 18s ease-in-out infinite alternate;
  opacity: 0.6;
}

[data-theme="dark"] body::before {
  opacity: 0.35;
}

@keyframes auroraDrift {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(30px, -25px) scale(1.08); }
}

/* --- RESET & BASE --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
}

html { color-scheme: light; }
[data-theme="dark"] { color-scheme: dark; }

/* --- CUSTOM SCROLLBAR STYLING --- */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-base-2);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--teal), var(--violet));
  border-radius: 10px;
  border: 2px solid var(--bg-base-2);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--violet), var(--teal));
}

::-webkit-scrollbar-thumb:active {
  background: var(--teal);
}

/* Firefox scrollbar styling */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--teal) var(--bg-base-2);
}

/* --- FOCUS-VISIBLE (keyboard navigation) --- */
:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --- ANIMATIONS --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes pulseGlow {
  0%   { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.45); }
  70%  { box-shadow: 0 0 0 14px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

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

@keyframes successPop {
  0%   { opacity: 0; transform: scale(0.3); }
  50%  { opacity: 1; transform: scale(1.15); }
  70%  { transform: scale(0.95); }
  100% { opacity: 1; transform: scale(1); }
}

@keyframes checkmarkDraw {
  from { stroke-dashoffset: 24; }
  to   { stroke-dashoffset: 0; }
}

@keyframes toastSlideIn {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes badgePop {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.15); }
  100% { transform: scale(1); }
}

/* --- REDUCED MOTION (accessibility) --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- STAGGERED CARD ENTRY (course grid reveals one-by-one) --- */
.course-grid .card {
  animation: fadeIn var(--dur-slow) var(--ease-out-expo) both;
}
.course-grid .card:nth-child(1) { animation-delay: 0ms; }
.course-grid .card:nth-child(2) { animation-delay: 60ms; }
.course-grid .card:nth-child(3) { animation-delay: 120ms; }
.course-grid .card:nth-child(4) { animation-delay: 180ms; }
.course-grid .card:nth-child(5) { animation-delay: 240ms; }
.course-grid .card:nth-child(n+6) { animation-delay: 300ms; }

/* Cards outside the grid keep their original animation */
.card:not(.course-grid .card), section {
  animation: fadeIn var(--dur-slow) var(--ease-out-expo) forwards;
}

/* --- NAVBAR --- */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 6%;
  background: var(--card-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 4px 24px rgba(15, 12, 60, 0.06);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.brand-wordmark {
  height: 26px;
  width: auto;
  display: block;
  /* Tames any lingering 1px light fringe from the keyed PNG:
     blend the bitmap edges into the page instead of showing a halo. */
  mix-blend-mode: screen;
}

[data-theme="light"] .brand-wordmark {
  mix-blend-mode: multiply;
}

.brand-text {
  background: linear-gradient(135deg, var(--teal), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- SPLASH SCREEN --- */
#splashScreen {
  position: fixed;
  inset: 0;
  z-index: 999999;
  background: var(--bg-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  transition: opacity 0.6s ease, transform 0.6s ease;
  overflow: hidden;
  cursor: pointer;
}

#splashScreen.splash-fade-out {
  opacity: 0;
  transform: scale(1.04);
  pointer-events: none;
}

/* Splash: calm clean backdrop. No lighting tricks — the artwork
   (V mark orbit ring + breathing lockup) carries the premium feel. */
.splash-glow { display: none; }

/* No vignette overlay — keep the splash backdrop flat and calm. */
#splashScreen::before { content: none; }

[data-theme="light"] #splashScreen::before { content: none; }

/* Brand lockup: mark + wordmark rise together, then settle into a
   barely-there premium "breathing" float (also runs under the hint). */
.splash-brand {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  animation:
    splashBrandIn 1.5s var(--ease-out-expo) both,
    splashBreathe 5.5s 1.9s ease-in-out infinite;
  will-change: transform;
}

.splash-logo {
  width: 120px;
  height: auto;
  /* Clean grounded shadow on a flat backdrop — no top-light shine. */
  filter: drop-shadow(0 18px 28px rgba(2, 4, 12, 0.35));
  animation: splashMarkSheen 1.1s var(--ease-out-expo) both;
}

.splash-wordmark {
  height: 44px;
  width: auto;
  mix-blend-mode: screen;
}

[data-theme="light"] .splash-wordmark {
  mix-blend-mode: multiply;
}

/* Thin premium divider that draws itself under the wordmark. */
.splash-rule {
  width: min(52vw, 220px);
  height: 1px;
  background: var(--card-border);
  overflow: hidden;
}

.splash-rule span {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--teal), var(--violet-2), transparent);
  transform: scaleX(0);
  animation: splashRuleDraw 1s 0.7s var(--ease-out-expo) forwards;
}

.splash-text {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--teal), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.splash-hint {
  font-size: 0.95rem;
  color: var(--text-muted);
  animation: splashHintPulse 2s ease-in-out infinite;
  animation-delay: 1.9s;
  opacity: 0;
}

@keyframes splashGlowIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes splashBrandIn {
  from { opacity: 0; transform: translateY(26px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* Subtle idle float: ±4px / ±0.6deg — noticeable, never seasick. */
@keyframes splashBreathe {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50%      { transform: translateY(-4px) rotate(0.6deg); }
}

@keyframes splashMarkSheen {
  from { opacity: 0; transform: scale(0.82); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes splashRuleDraw {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

@keyframes splashHintPulse {
  0%, 100% { opacity: 0.5; }
  50%      { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .splash-glow,
  .splash-brand,
  .splash-logo,
  .splash-rule span {
    animation: none;
  }
  .splash-brand { opacity: 1; }
  .splash-glow { opacity: 1; }
  .splash-rule span { transform: scaleX(1); }
}

.theme-btn {
  background: var(--card-bg);
  border: 1.5px solid var(--card-border);
  padding: 8px 12px;
  border-radius: 12px;
  cursor: pointer;
  font-size: 1.1rem;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.2s ease, box-shadow 0.25s ease;
  color: var(--text-primary);
}

.theme-btn:hover {
  transform: scale(1.08) rotate(-8deg);
  border-color: var(--teal);
  box-shadow: 0 6px 18px var(--teal-glow);
}

/* --- CONTAINER & GLASS CARDS --- */
.container {
  width: min(92%, 850px);
  margin: 40px auto;
  position: relative;
  z-index: 1;
}

.card {
  background: var(--card-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  padding: 40px 35px;
  border-radius: 22px;
  box-shadow: var(--shadow);
  border: 1.5px solid var(--card-border);
  max-width: 460px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s ease, border-color 0.35s ease;
}

.card::before {
  content: "";
  position: absolute;
  inset: -1.5px;
  border-radius: inherit;
  padding: 1.5px;
  background: conic-gradient(from 0deg, var(--teal), var(--violet), transparent 35%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s ease;
  animation: spinOrbit 6s linear infinite;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 30px 60px -18px var(--accent-glow);
}

.card:hover::before {
  opacity: 1;
}

.card h2 {
  font-family: var(--font-display);
  margin-bottom: 8px;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: var(--text-primary);
}

.card p {
  color: var(--text-muted);
  margin-bottom: 25px;
  font-size: 0.95rem;
  line-height: 1.55;
}

/* --- FORM FIELDS & INPUTS --- */
.field {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-primary);
  letter-spacing: 0.3px;
}

input, select {
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1.5px solid var(--border);
  background: rgba(127, 127, 127, 0.06);
  color: var(--text-primary);
  outline: none;
  font-size: 0.95rem;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  cursor: pointer;
  padding-right: 42px !important;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2316C4D9'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2.5' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-hotspot: no-hotspot;
  background-position: right 14px center;
  background-size: 16px;
}

[data-theme="dark"] select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%232DE0C9'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2.5' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
}

select option, select optgroup {
  background-color: var(--bg-base-2);
  color: var(--text-primary);
  padding: 10px;
  font-weight: 500;
  font-size: 0.9rem;
}

input::placeholder { color: var(--text-muted); opacity: 0.7; }

input:focus, select:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 4px var(--teal-glow);
  background: var(--card-bg);
  outline: none;
  transform: translateY(-1px);
}

input:focus::placeholder {
  color: var(--text-muted);
  opacity: 0.5;
}

/* --- CUSTOM ATTENDANCE DROPDOWN & BADGES --- */
.custom-dropdown {
  border: 1.5px solid var(--border) !important;
  font-weight: 500;
  letter-spacing: 0.2px;
  background: var(--card-bg) !important;
  color: var(--text-primary) !important;
  transition: all 0.3s ease;
}

.custom-dropdown:hover {
  border-color: var(--teal) !important;
  background: var(--bg) !important;
  transform: translateY(-1px);
}

.custom-dropdown:focus {
  border-color: var(--teal) !important;
  box-shadow: 0 0 0 4px var(--teal-glow);
}

.hall-info-chip {
  margin-top: 10px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.78rem;
  line-height: 1.45;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.25s ease;
  border: 1px solid var(--border);
  background: rgba(127, 127, 127, 0.06);
  color: var(--text-muted);
}

.hall-info-chip.badge-hall {
  background: rgba(34, 197, 140, 0.12);
  border-color: rgba(34, 197, 140, 0.35);
  color: var(--success);
}

.hall-info-chip.badge-emergency {
  background: rgba(253, 126, 20, 0.12);
  border-color: rgba(253, 126, 20, 0.35);
  color: #fd7e14;
}

.hall-info-chip.badge-live {
  background: rgba(22, 196, 217, 0.12);
  border-color: rgba(22, 196, 217, 0.35);
  color: var(--teal);
}

/* --- LUCIDE VECTOR ICONS STYLING --- */
.lucide {
  width: 18px;
  height: 18px;
  stroke-width: 2.2px;
  vertical-align: -3px;
  display: inline-block;
  flex-shrink: 0;
}

.btn .lucide {
  vertical-align: -3px;
  margin-right: 6px;
}

.theme-btn .lucide {
  margin: 0;
  vertical-align: middle;
}

.section-title .lucide,
.card h2 .lucide,
.card h3 .lucide,
.dashboard-header h2 .lucide {
  color: var(--teal);
  vertical-align: -3px;
  margin-right: 8px;
}

/* --- AUTOCOMPLETE DROPDOWN --- */
.autocomplete-wrapper {
  position: relative;
}

.suggestions-box {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 30;
  background: var(--card-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1.5px solid var(--card-border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  max-height: 220px;
  overflow-y: auto;
}

.suggestion-item {
  padding: 11px 15px;
  font-size: 0.9rem;
  color: var(--text-primary);
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background-color 0.15s ease;
}

.suggestion-item:last-child {
  border-bottom: none;
}

.suggestion-item:hover,
.suggestion-item:focus {
  background: var(--teal-glow);
}

/* --- BUTTONS --- */
.btn {
  width: 100%;
  padding: 15px;
  border: none;
  border-radius: 14px;
  background: var(--violet);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.2px;
  cursor: pointer;
  box-shadow: 0 10px 24px var(--accent-glow);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease, filter 0.25s ease;
  min-height: 48px; /* Touch-friendly minimum height */
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px var(--accent-glow);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

@media (max-width: 600px) {
  .btn {
    padding: 16px 20px;
    font-size: 1rem;
    border-radius: 16px;
  }

  .btn-outline {
    padding: 14px 18px;
    font-size: 0.9rem;
  }
}

.btn-secondary {
  background: var(--text-primary);
  color: var(--bg-base);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
  margin-bottom: 10px;
}

.btn-secondary:hover {
  background: var(--text-primary);
  filter: brightness(1.15);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text-primary);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--teal-glow);
  border-color: var(--teal);
  transform: translateY(-1px);
}

.hidden { display: none !important; }

/* --- DASHBOARD & GRIDS --- */
.dashboard-header {
  margin-bottom: 30px;
}

.dashboard-header h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.8px;
}

.action-buttons {
  display: flex;
  gap: 15px;
  margin-bottom: 40px;
}

.section-title {
  font-family: var(--font-display);
  margin-bottom: 20px;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.course-grid .card {
  max-width: 100%;
  margin: 0;
  padding: 30px;
}

/* --- LIVE SESSION BANNER PULSE --- */
#sessionBanner {
  animation: pulseGlow 2.2s infinite;
  backdrop-filter: var(--glass-blur);
}

/* --- MODALS --- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(5, 6, 15, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.35s;
  padding: 20px;
  z-index: 100;
}

.modal.show {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background: var(--card-bg);
  backdrop-filter: var(--glass-blur);
  width: 100%;
  max-width: 420px;
  padding: 35px;
  border-radius: 22px;
  border: 1.5px solid var(--card-border);
  box-shadow: var(--shadow);
  transform: scale(0.94) translateY(8px);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal.show .modal-card {
  transform: scale(1) translateY(0);
}

.modal-card h3 {
  font-family: var(--font-display);
  margin-bottom: 20px;
  font-size: 1.5rem;
  font-weight: 700;
}

.modal-actions {
  display: flex;
  gap: 12px;
  margin-top: 25px;
}

/* --- MOBILE HAMBURGER MENU --- */
.hamburger-btn {
  display: none;
  background: var(--card-bg);
  border: 1.5px solid var(--card-border);
  border-radius: 12px;
  padding: 8px 12px;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
  z-index: 60;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.hamburger-btn:hover {
  background: var(--teal-glow);
  border-color: var(--teal);
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  gap: 15px;
  align-items: center;
}

@media (max-width: 768px) {
  .hamburger-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    flex-direction: column;
    padding: 24px 20px;
    gap: 12px;
    border-bottom: 1px solid var(--card-border);
    box-shadow: var(--shadow);
    clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
    transition: clip-path 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .nav-links.show-menu {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  }

  .nav-links button {
    width: 100%;
    text-align: center;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 0.95rem;
    transition: all 0.2s ease;
  }

  .nav-links button:hover {
    background: var(--teal-glow);
    border-color: var(--teal);
    transform: translateY(-2px);
  }
}

/* ============================================================
   TOAST NOTIFICATION SYSTEM
   ============================================================ */
#toast-container {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
  max-width: min(360px, calc(100vw - 32px));
}

@media (max-width: 600px) {
  #toast-container {
    top: 80px;
    bottom: auto;
    right: 16px;
    left: 16px;
    max-width: 100%;
  }
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  border-radius: 16px;
  background: var(--card-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1.5px solid var(--card-border);
  box-shadow: var(--shadow);
  font-size: 0.9rem;
  color: var(--text-primary);
  line-height: 1.45;
  pointer-events: all;
  animation: toastIn 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  will-change: transform, opacity;
}

.toast.toast-exit {
  animation: toastOut 0.28s ease forwards;
}

.toast-icon {
  font-size: 1.15rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.toast-body {
  flex: 1;
}

.toast-title {
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 2px;
  font-family: var(--font-display);
}

.toast-message {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.toast-success { border-left: 3px solid var(--success); }
.toast-error   { border-left: 3px solid var(--danger); }
.toast-warning { border-left: 3px solid #fd7e14; }
.toast-info    { border-left: 3px solid var(--teal); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(24px) scale(0.96); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0) scale(1); }
  to   { opacity: 0; transform: translateX(24px) scale(0.94); }
}

/* --- BUTTON MICRO-INTERACTIONS --- */
.btn, .drawer-item, .hamburger-btn {
  transition: transform 0.1s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.btn:active, .drawer-item:active {
  transform: scale(0.96);
}

/* --- SKELETON SHIMMER (loading states) --- */
.skeleton {
  background: linear-gradient(90deg, var(--bg-base-2) 25%, var(--card-bg) 50%, var(--bg-base-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: 8px;
}

/* --- SUCCESS CELEBRATION (check-in) --- */
.success-overlay {
  position: fixed;
  inset: 0;
  z-index: 9800;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(10, 11, 20, 0.85);
  backdrop-filter: blur(8px);
  animation: fadeIn 0.25s ease forwards;
}

.success-checkmark {
  width: 80px;
  height: 80px;
  animation: successPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.success-checkmark path {
  stroke: var(--success);
  stroke-width: 3;
  stroke-dasharray: 24;
  stroke-dashoffset: 24;
  animation: checkmarkDraw 0.4s 0.2s ease forwards;
}

.success-text {
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-top: 16px;
  opacity: 0;
  animation: fadeIn 0.3s 0.4s ease forwards;
}

/* ============================================================
   CUSTOM CONFIRM DIALOG
   ============================================================ */
#confirm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 6, 15, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s;
}

#confirm-overlay.show {
  opacity: 1;
  visibility: visible;
}

#confirm-box {
  background: var(--card-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1.5px solid var(--card-border);
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: 32px 28px;
  max-width: 400px;
  width: 100%;
  transform: scale(0.94) translateY(8px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

#confirm-overlay.show #confirm-box {
  transform: scale(1) translateY(0);
}

#confirm-icon {
  font-size: 2.2rem;
  text-align: center;
  margin-bottom: 12px;
}

#confirm-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  text-align: center;
}

#confirm-message {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.55;
  margin-bottom: 24px;
}

/* Key/value table shown when showConfirm receives `details`
   (e.g. the signup double-check review). */
#confirm-details {
  margin: -12px 0 16px;
  padding: 4px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  max-height: 200px;
  overflow-y: auto;
  text-align: left;
}

#confirm-details.hidden {
  display: none !important;
}

.confirm-detail-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 7px 0;
  font-size: 0.82rem;
  border-bottom: 1px dashed var(--border);
}

.confirm-detail-row:last-child {
  border-bottom: none;
}

.confirm-detail-label {
  color: var(--text-muted);
  font-weight: 600;
  flex-shrink: 0;
}

.confirm-detail-value {
  color: var(--text-primary);
  font-weight: 700;
  text-align: right;
  word-break: break-word;
}

#confirm-actions {
  display: flex;
  gap: 12px;
}

#confirm-cancel {
  flex: 1;
  padding: 12px;
  border-radius: 12px;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

#confirm-cancel:hover {
  background: var(--teal-glow);
  border-color: var(--teal);
}

#confirm-ok {
  flex: 1;
  padding: 12px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, var(--danger), #c0392b);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: filter 0.2s ease, transform 0.2s ease;
}

#confirm-ok:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

#confirm-ok.ok-safe {
  background: linear-gradient(135deg, var(--violet), var(--teal));
}

/* --- SECURITY OVERLAY STYLING --- */
#securityOverlay {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

#securityOverlay.hidden {
  display: none !important;
}

#securityOverlay.show {
  display: flex !important;
}

/* ============================================================
   RESPONSIVE LAYOUT HELPERS (rep control center + panels)
   ============================================================ */
.hall-actions-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.hall-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.hall-actions button {
  min-height: 36px;
  padding: 6px 8px;
  font-size: 0.8rem;
}

.mode-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
}

.headcount-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.manual-request-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.manual-request-actions [data-approve-uid],
.manual-request-actions [data-reject-uid] {
  flex: 1 1 auto;
}

/* ============================================================
   APP GUIDE MODAL (self-explanatory handbook)
   ============================================================ */
.guide-section {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 14px 12px;
  margin-bottom: 12px;
}

.guide-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(108, 93, 211, 0.12);
  color: var(--violet);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
}

.guide-step {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.guide-step-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--violet);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.guide-check {
  font-weight: 700;
  margin-right: 4px;
}

.network-chip {
  display: inline-flex;
  align-items: center;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  background: var(--card-bg);
  color: var(--text-muted);
  white-space: nowrap;
}

.manage-tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.manage-tool-btn {
  font-size: 0.78rem;
  padding: 10px 8px;
}

.manage-tool-btn.active {
  border: 2px solid var(--teal) !important;
  background: rgba(45, 224, 201, 0.15) !important;
  color: var(--teal) !important;
  box-shadow: none !important;
}

/* Mobile guide tweak: comfortable spacing for the handbook */
@media (max-width: 640px) {
  .guide-section {
    padding: 12px 10px;
  }

  .guide-step {
    gap: 8px;
  }

  .guide-step-num {
    width: 20px;
    height: 20px;
    font-size: 0.7rem;
  }
}

/* ============================================================
   MOBILE / NARROW-SCREEN POLISH
   ============================================================ */
@media (max-width: 640px) {
  /* App shell breathing room */
  .container {
    width: min(96%, 850px);
    margin: 20px auto;
    padding: 0 10px;
  }

  .navbar {
    padding: 12px 4%;
  }

  .brand {
    font-size: 1.25rem;
  }

  .brand-wordmark {
    height: 22px;
  }

  .splash-logo {
    width: 104px;
  }

  .splash-wordmark {
    height: 34px;
    max-width: 78vw;
  }

  .card {
    padding: 26px 20px;
  }

  .dashboard-header h2 {
    font-size: 1.6rem;
  }

  .section-title {
    font-size: 1.1rem;
  }

  .course-grid {
    gap: 16px;
  }

  .action-buttons {
    flex-direction: column;
    gap: 12px;
  }

  /* Course Rep Control Center */
  #repControls {
    padding: 16px 14px !important;
  }

  #repControls h3 {
    font-size: 1.05rem;
  }

  #repControls > div,
  #repControls .hall-info-chip {
    margin-bottom: 14px;
  }

  .hall-actions-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .hall-actions {
    width: 100%;
    justify-content: center;
    gap: 10px;
  }

  .hall-actions button {
    flex: 1 1 100%;
    min-height: 42px;
    font-size: 0.78rem;
  }

  /* Attendance mode cards: single column, room to breathe */
  #modeCardsGrid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  #modeCardsGrid button[data-mode] {
    padding: 12px 12px !important;
    font-size: 0.78rem !important;
  }

  #modeCardsGrid button[data-mode] div {
    margin-bottom: 4px !important;
  }

  /* Headcount: input and button stack full-width */
  .headcount-row {
    flex-direction: column;
    align-items: stretch;
  }

  .headcount-row input {
    flex: 1 1 100%;
  }

  .headcount-row .btn {
    width: 100% !important;
    padding: 10px 14px !important;
    font-size: 0.8rem !important;
  }

  /* Manual verification requests: full-width stacked actions */
  .manual-request-actions {
    flex-direction: column;
  }

  .manual-request-actions [data-approve-uid],
  .manual-request-actions [data-reject-uid] {
    width: 100% !important;
    padding: 10px 12px !important;
    font-size: 0.78rem !important;
  }

  /* Lower sections: slightly tighter padding */
  #assistantManagementSection,
  #exemptionManagementSection,
  #repArchiveSection,
  #studentAnalyticsSection {
    padding: 16px 14px !important;
  }

  /* Modals & confirm dialogs */
  .modal-card {
    padding: 24px 20px;
  }

  .modal-actions {
    flex-direction: column;
    gap: 10px;
  }

  .modal-actions .btn {
    min-height: 46px;
  }

  #confirm-box {
    padding: 24px 20px;
  }

  /* Session banner + PIN display */
  #activePinDisplay {
    padding: 12px 12px;
  }

  #pinCodeText {
    font-size: 1.7rem;
    letter-spacing: 6px;
  }

  /* QR projector overlay: fit narrow screens, never overflow the viewport */
  #qrModeOverlay {
    overflow-y: auto;
  }
  #qrCourseTitle {
    font-size: 1.1rem;
  }
  #qrCanvas {
    max-width: min(86vw, 540px);
    max-height: min(70vh, 540px);
    width: auto;
    height: auto;
  }
  #qrPinText {
    font-size: 1.2rem;
    letter-spacing: 6px;
  }

  #closeQrBtn {
    width: auto;
    padding: 10px 20px;
    font-size: 0.85rem;
  }
}
/* ============================================================
   REP MISSION-CONTROL DRAWER (slide-out panel + draggable tab)
   Staff/assistant-only chrome. One portal view at a time.
   ============================================================ */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9400;
  background: rgba(11, 13, 23, 0.55);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.drawer-backdrop.show {
  opacity: 1;
  pointer-events: auto;
}

.portal-drawer {
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  width: min(84vw, 340px);
  background: var(--bg-base);
  border-left: 1px solid var(--border);
  box-shadow: -18px 0 30px rgba(11, 13, 23, 0.25);
  transform: translateX(102%);
  transition: transform 0.28s cubic-bezier(0.25, 0.7, 0.3, 1);
  z-index: 9450;
  display: flex;
  flex-direction: column;
}
.portal-drawer.show {
  transform: translateX(0);
}

.drawer-header {
  padding: 16px 16px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.drawer-title {
  font-weight: 700;
  color: var(--navy);
  font-size: 0.98rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.drawer-close {
  background: transparent;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--muted);
  line-height: 1;
  padding: 2px 8px;
  border-radius: 8px;
}
.drawer-close:hover {
  color: var(--text-primary);
  background: var(--bg-base-2);
}

.drawer-nav {
  padding: 8px 12px 4px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  flex: 1;
}
.drawer-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  text-align: left;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text-primary);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.drawer-item:hover {
  border-color: var(--violet);
}
.drawer-item.active {
  border-color: var(--violet);
  background: var(--accent-glow);
  color: var(--violet);
}
.drawer-item.hidden {
  display: none;
}
.drawer-badge {
  min-width: 22px;
  height: 22px;
  border-radius: 999px;
  background: var(--danger);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 6px;
  line-height: 1;
}
.drawer-footnote {
  font-size: 0.72rem;
  color: var(--muted);
  padding: 10px 14px;
  border-top: 1px solid var(--border);
}

/* The protruding handle — docked to an edge, dragged to move it. */
.drawer-tab {
  position: fixed;
  z-index: 9500;
  width: 36px;
  height: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  background: var(--violet);
  color: #fff;
  border: none;
  cursor: grab;
  box-shadow: 0 4px 14px rgba(11, 13, 23, 0.35);
  touch-action: none;
  animation: drawerTabPulse 2.4s ease-in-out infinite;
}
@keyframes drawerTabPulse {
  0%,
  100% {
    box-shadow:
      0 4px 14px rgba(11, 13, 23, 0.35),
      0 0 0 0 rgba(139, 92, 246, 0.55);
  }
  50% {
    box-shadow:
      0 4px 14px rgba(11, 13, 23, 0.35),
      0 0 0 9px rgba(139, 92, 246, 0);
  }
}
.drawer-tab .tab-glyph {
  font-size: 1.15rem;
  line-height: 1;
}
.drawer-tab .tab-label {
  font-size: 0.55rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
  line-height: 1;
  opacity: 0.9;
}
.drawer-tab:active {
  cursor: grabbing;
}
.drawer-tab.dragging {
  transition: none;
}
/* --tab-offset on side edges = the tab's TOP edge in px (no centering
   transform), so the default reads as "just below the sticky navbar". */
.drawer-tab[data-edge="right"] {
  right: 0;
  top: var(--tab-offset, 76px);
  border-radius: 12px 0 0 12px;
}
.drawer-tab[data-edge="left"] {
  left: 0;
  top: var(--tab-offset, 76px);
  border-radius: 0 12px 12px 0;
}
.drawer-tab[data-edge="top"] {
  top: 66px; /* below the sticky navbar — flush top hid it behind the bar on mobile */
  left: var(--tab-offset, 40%);
  transform: translateX(-50%);
  border-radius: 0 0 10px 10px;
}
.drawer-tab[data-edge="bottom"] {
  bottom: calc(12px + env(safe-area-inset-bottom, 0px));
  left: var(--tab-offset, 40%);
  transform: translateX(-50%);
  border-radius: 10px 10px 0 0;
}
/* Desktop: same spot, just scaled up for the bigger screen. */
@media (min-width: 768px) {
  .drawer-tab {
    width: 46px;
    height: 104px;
    gap: 5px;
  }
  .drawer-tab .tab-glyph {
    font-size: 1.45rem;
  }
  .drawer-tab .tab-label {
    font-size: 0.68rem;
  }
  .drawer-tab[data-edge="right"],
  .drawer-tab[data-edge="left"] {
    top: var(--tab-offset, 84px);
  }
}
.drawer-tab.hidden {
  display: none;
}
.drawer-tab-badge {
  position: absolute;
  top: -5px;
  right: -7px;
  min-width: 17px;
  height: 17px;
  border-radius: 999px;
  background: var(--danger);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  line-height: 1;
  border: 2px solid #fff;
  animation: badgePop 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  transform-origin: center;
}
/* Right-docked tab: the badge sits on the INNER side (toward the content),
   never under the browser scrollbar that hugs the right screen edge. */
.drawer-tab[data-edge="right"] .drawer-tab-badge {
  right: auto;
  left: -7px;
}

/* 📡 HOTSPOT MODE — a session hotspot's ONLY job is displaying the QR.
   Close Class, headcount, the manual queue, the hotspots picker and the
   pre-class setup card are rep work and never render on their screen. */
#repControls.hotspot-view #sessionSetupCard,
#repControls.hotspot-view #closeClassWrapper,
#repControls.hotspot-view #presenceCheckPanel,
#repControls.hotspot-view #manualRequestsPanel,
#repControls.hotspot-view #hotspotsBtn {
  display: none !important;
}
/* Semester report table. Shares the card look so the rep screen reads as one surface. */
.report-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.report-table th, .report-table td {
  text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--card-border);
}
.report-table th { color: var(--text-muted); font-weight: 700; font-size: 0.72rem;
  text-transform: uppercase; letter-spacing: 0.8px; }
.report-table .num { text-align: right; }
.report-table tbody tr:last-child td { border-bottom: none; }