/* ═══════════════════════════════════════════════════════════════
   КампусПлюс СГУГиТ  •  Design System v3
   Clean dark theme · glassmorphism · gradients · micro-interactions
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=Space+Grotesk:wght@600;700&display=swap');

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  /* Surface */
  --bg:          #06080f;
  --bg-soft:     #0d1422;
  --surface-1:   rgba(18, 24, 38, 0.70);
  --surface-2:   rgba(15, 20, 33, 0.56);
  --surface-3:   rgba(224, 123, 135, 0.05);

  /* Glass */
  --glass:       rgba(14, 20, 35, 0.66);
  --glass-border:rgba(133, 148, 176, 0.20);
  --glass-blur:  16px;

  /* Text */
  --text:        #f2f5fb;
  --text-2:      #aab6cc;
  --text-3:      #75839e;

  /* Accent — muted rose */
  --accent:      #e07b87;
  --accent-bold: #a54f5f;
  --accent-cool: #8da2cf;
  --accent-glow: rgba(224, 123, 135, 0.24);
  --accent-bg:   rgba(224, 123, 135, 0.11);

  /* Semantic */
  --success:     #34d399;
  --success-bg:  rgba(52, 211, 153, 0.12);
  --danger:      #f87171;
  --danger-bg:   rgba(248, 113, 113, 0.12);
  --warn:        #fbbf24;
  --info:        #60a5fa;
  --info-bg:     rgba(96, 165, 250, 0.14);

  /* Spacing */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px;
  --sp-4: 16px; --sp-5: 20px; --sp-6: 24px;
  --sp-8: 32px; --sp-10: 40px;

  /* Radii */
  --r-sm:  8px;  --r-md:  12px;
  --r-lg:  18px; --r-xl:  24px;
  --r-full:999px;

  /* Shadows */
  --shadow-sm:  0 2px 8px rgba(0,0,0,0.20);
  --shadow-md:  0 8px 24px rgba(0,0,0,0.28);
  --shadow-lg:  0 16px 48px rgba(0,0,0,0.35);
  --shadow-glow:0 0 40px var(--accent-glow);

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur:  180ms;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Base ──────────────────────────────────────────────────── */
body {
  font-family: "Manrope", "Segoe UI", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 980px 520px at 12% 0%, rgba(99, 102, 241, 0.14), transparent 62%),
    radial-gradient(ellipse 680px 380px at 88% 4%, rgba(224, 123, 135, 0.12), transparent 58%),
    radial-gradient(ellipse 760px 320px at 50% 100%, rgba(56, 189, 248, 0.08), transparent 58%);
  background-size: 135% 135%, 155% 155%, 150% 150%;
  background-position: 0% 0%, 100% 0%, 50% 100%;
  animation: ambientShift 26s ease-in-out infinite alternate;
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video, canvas { max-width: 100%; height: auto; }

a { color: var(--accent); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: #f2a8b1; }

h1, h2, h3, h4 {
  font-family: "Space Grotesk", "Manrope", system-ui, sans-serif;
  color: var(--text);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(1.65rem, 3vw, 2.2rem); }
h2 { font-size: clamp(1.3rem, 2.5vw, 1.65rem); margin-bottom: var(--sp-4); }
h3 { font-size: 1.1rem; margin-bottom: var(--sp-3); }
h4 { font-size: 1rem; }

p { color: var(--text-2); }

label {
  display: block;
  font-weight: 600;
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: var(--sp-1);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.muted { color: var(--text-3); font-size: 13px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Layout ────────────────────────────────────────────────── */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

main.container {
  padding-top: var(--sp-8);
  padding-bottom: var(--sp-10);
}

main.container > * {
  opacity: 0;
  transform: translateY(14px);
  animation: pageReveal 520ms var(--ease) forwards;
}
main.container > *:nth-child(2) { animation-delay: 90ms; }
main.container > *:nth-child(3) { animation-delay: 150ms; }
main.container > *:nth-child(4) { animation-delay: 220ms; }

/* ── Header ────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 12, 21, 0.84);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--glass-border);
  padding: var(--sp-3) 0;
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(141, 162, 207, 0.42), rgba(224, 123, 135, 0.42), transparent);
  pointer-events: none;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: var(--sp-4);
  position: relative;
}

.header-shell {
  flex-wrap: nowrap;
  row-gap: var(--sp-2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 1 350px;
  min-width: 0;
  max-width: 350px;
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
}
.brand-logo-shell {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  overflow: visible;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.03));
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.26);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.brand-logo {
  width: 28px;
  height: 28px;
  object-fit: contain;
  object-position: center;
  flex-shrink: 0;
  filter: saturate(1.06) contrast(1.03);
}
.brand-copy {
  min-width: 0;
  max-width: 100%;
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}
.brand-name {
  font-family: "Space Grotesk", "Manrope", system-ui, sans-serif;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
  white-space: nowrap;
}
.brand-role {
  font-size: 11px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.03em;
  text-transform: none;
  color: var(--text-3);
  white-space: normal;
  max-width: 100%;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}
.brand:hover .brand-name {
  color: #ffffff;
}
.brand:hover .brand-role {
  color: #c8d2e8;
}

.header-search {
  flex: 1 1 360px;
  max-width: 420px;
  min-width: 220px;
  position: relative;
  margin-left: 0;
}

.header-search::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 50%;
  width: 16px;
  height: 16px;
  transform: translateY(-50%);
  border: 2px solid rgba(189, 200, 222, 0.55);
  border-radius: 50%;
  pointer-events: none;
}

.header-search::after {
  content: "";
  position: absolute;
  left: 25px;
  top: calc(50% + 5px);
  width: 8px;
  height: 2px;
  background: rgba(189, 200, 222, 0.55);
  transform: rotate(45deg);
  border-radius: 999px;
  pointer-events: none;
}

.header-search input {
  margin: 0;
  min-height: 42px;
  padding: 10px 14px 10px 40px;
  border-radius: var(--r-full);
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.01));
  border: 1px solid rgba(139, 154, 183, 0.32);
  color: var(--text);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.header-search input::placeholder {
  color: #8fa1bf;
}

.header-search input:focus {
  border-color: rgba(166, 181, 210, 0.72);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  min-height: 34px;
  margin-left: auto;
  margin-right: 2px;
  padding: 0;
  border-radius: 999px;
  border: none;
  background: transparent;
  color: transparent;
  font-family: inherit;
  font-size: 0;
  font-weight: 400;
  letter-spacing: 0;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform var(--dur) var(--ease);
}
.theme-toggle:hover {
  transform: translateY(-1px);
}

.theme-toggle-track {
  position: relative;
  width: 58px;
  height: 34px;
  border-radius: 999px;
  background: linear-gradient(145deg, rgba(74, 87, 120, 0.64), rgba(38, 48, 74, 0.82));
  border: 1px solid rgba(155, 171, 204, 0.32);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.12),
    0 8px 20px rgba(3, 7, 18, 0.34);
  transition: background-color 180ms var(--ease), border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.theme-toggle-track::before {
  content: "☾";
  position: absolute;
  top: 7px;
  left: 10px;
  font-size: 14px;
  line-height: 1;
  color: rgba(224, 233, 252, 0.92);
  opacity: 0.95;
  transition: opacity 180ms var(--ease);
}

.theme-toggle-dot {
  position: absolute;
  left: 3px;
  top: 3px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, #f7fbff 0%, #dfe9ff 66%, #b9cae9 100%);
  border: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.34);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 180ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 160ms var(--ease);
}

.theme-toggle-dot::before {
  content: "☾";
  font-size: 13px;
  line-height: 1;
  color: rgba(74, 92, 130, 0.94);
  transform: translateY(-0.5px);
}

.theme-toggle[aria-checked="true"] .theme-toggle-track {
  background: linear-gradient(145deg, rgba(166, 101, 122, 0.70), rgba(106, 75, 140, 0.78));
  border-color: rgba(205, 128, 147, 0.56);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.14),
    0 10px 22px rgba(79, 33, 49, 0.34);
}

.theme-toggle[aria-checked="true"] .theme-toggle-dot {
  transform: translateX(26px);
  background: radial-gradient(circle at 34% 30%, #f7f1cf 0%, #e5c478 62%, #bc8a42 100%);
}

.theme-toggle[aria-checked="true"] .theme-toggle-dot::before {
  content: "☀";
  color: #a96e16;
}

.theme-toggle[aria-checked="true"] .theme-toggle-track::before {
  opacity: 0.24;
}

.theme-toggle:active .theme-toggle-dot {
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.32);
}

.theme-toggle-label {
  display: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: nowrap;
  min-width: 0;
  margin-left: 0;
  flex-shrink: 0;
}

.nav a:not(.button),
.nav .link-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  border-radius: var(--r-sm);
  transition: all var(--dur) var(--ease);
  border: none;
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  font-family: inherit;
}

.site-header .nav > * {
  flex-shrink: 0;
}

.nav a:not(.button):hover,
.nav .link-button:hover {
  color: var(--text);
  background: rgba(255,255,255,0.07);
}

.nav .button { color: #fff; }

.nav form.inline { margin: 0; display: inline-flex; }

/* Stable desktop header for admin/teacher pages: logo stays fixed, search goes to row 2 */
@media (min-width: 901px) {
  body.layout-admin .header-shell,
  body.layout-teacher .header-shell,
  body[class*="route-admin-"] .header-shell,
  body[class*="route-v1-admin-"] .header-shell,
  body[class*="route-v2-admin-"] .header-shell,
  body[class*="route-teacher-"] .header-shell,
  body[class*="route-v1-teacher-"] .header-shell,
  body[class*="route-v2-teacher"] .header-shell {
    flex-wrap: wrap;
    align-items: center;
    column-gap: var(--sp-3);
  }

  body.layout-admin .brand,
  body.layout-teacher .brand,
  body[class*="route-admin-"] .brand,
  body[class*="route-v1-admin-"] .brand,
  body[class*="route-v2-admin-"] .brand,
  body[class*="route-teacher-"] .brand,
  body[class*="route-v1-teacher-"] .brand,
  body[class*="route-v2-teacher"] .brand {
    order: 1;
    flex: 0 1 auto;
    max-width: 340px;
  }

  body.layout-admin .nav,
  body.layout-teacher .nav,
  body[class*="route-admin-"] .nav,
  body[class*="route-v1-admin-"] .nav,
  body[class*="route-v2-admin-"] .nav,
  body[class*="route-teacher-"] .nav,
  body[class*="route-v1-teacher-"] .nav,
  body[class*="route-v2-teacher"] .nav {
    order: 2;
    flex: 1 1 0;
    min-width: 0;
    margin-left: 0;
    justify-content: flex-end;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
  }

  body.layout-admin .nav::-webkit-scrollbar,
  body.layout-teacher .nav::-webkit-scrollbar,
  body[class*="route-admin-"] .nav::-webkit-scrollbar,
  body[class*="route-v1-admin-"] .nav::-webkit-scrollbar,
  body[class*="route-v2-admin-"] .nav::-webkit-scrollbar,
  body[class*="route-teacher-"] .nav::-webkit-scrollbar,
  body[class*="route-v1-teacher-"] .nav::-webkit-scrollbar,
  body[class*="route-v2-teacher"] .nav::-webkit-scrollbar {
    display: none;
  }

  body.layout-admin .theme-toggle,
  body.layout-teacher .theme-toggle,
  body[class*="route-admin-"] .theme-toggle,
  body[class*="route-v1-admin-"] .theme-toggle,
  body[class*="route-v2-admin-"] .theme-toggle,
  body[class*="route-teacher-"] .theme-toggle,
  body[class*="route-v1-teacher-"] .theme-toggle,
  body[class*="route-v2-teacher"] .theme-toggle {
    order: 3;
    margin-left: 0;
  }

  body.layout-admin .header-search,
  body.layout-teacher .header-search,
  body[class*="route-admin-"] .header-search,
  body[class*="route-v1-admin-"] .header-search,
  body[class*="route-v2-admin-"] .header-search,
  body[class*="route-teacher-"] .header-search,
  body[class*="route-v1-teacher-"] .header-search,
  body[class*="route-v2-teacher"] .header-search {
    order: 4;
    flex: 1 1 100%;
    max-width: none;
    min-width: 0;
  }
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 11px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}
.nav-toggle:hover { background: rgba(255,255,255,0.08); }
.nav-toggle-line {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--text);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

body.nav-open .nav-toggle-line:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.nav-open .nav-toggle-line:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle-line:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Nav icons */
.nav-link { display: inline-flex; align-items: center; gap: 8px; }
.nav-link::before {
  font-size: 14px;
  width: 24px; height: 24px; min-width: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-full);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
}
.icon-home::before        { content: "\1F3E0"; }
.icon-teacher::before     { content: "\1F468\200D\1F3EB"; }
.icon-students::before    { content: "\1F9D1\200D\1F393"; }
.icon-teachers::before    { content: "\1F469\200D\1F3EB"; }
.icon-groups::before      { content: "\1F465"; }
.icon-disciplines::before { content: "\1F4DA"; }
.icon-dashboard::before   { content: "\1F4CA"; }
.icon-login::before       { content: "\1F510"; }
.icon-register::before    { content: "\1F4DD"; }
.icon-logout::before      { content: "\21A9"; }

/* ── Buttons ───────────────────────────────────────────────── */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-height: 40px;
  padding: 8px 22px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-bold) 0%, #cd7583 100%);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--r-md);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  text-wrap: balance;
  box-shadow: 0 4px 14px var(--accent-glow);
  transition: all var(--dur) var(--ease);
  line-height: 1;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.button::after {
  content: "";
  position: absolute;
  top: -8px;
  left: -62%;
  width: 42%;
  height: calc(100% + 16px);
  background: linear-gradient(110deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: skewX(-18deg);
  transition: transform 560ms var(--ease);
  pointer-events: none;
}
.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px var(--accent-glow);
  color: #fff;
}
.button:hover::after {
  transform: translateX(260%) skewX(-18deg);
}
.button:active { transform: translateY(0); }

.button.secondary {
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: none;
}
.button.secondary::after { display: none; }
.button.secondary:hover {
  background: rgba(255,255,255,0.10);
  border-color: rgba(255,255,255,0.18);
  box-shadow: none;
}

.button.danger {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  box-shadow: 0 4px 14px rgba(239,68,68,0.25);
}
.button.danger::after { display: none; }
.button.danger:hover {
  box-shadow: 0 8px 24px rgba(239,68,68,0.3);
}

.link-button {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 7px 14px;
  border-radius: var(--r-sm);
  color: var(--text-2);
  font-weight: 600;
  font-size: 13px;
  font-family: inherit;
  transition: all var(--dur) var(--ease);
}
.link-button:hover {
  color: var(--text);
  background: rgba(255,255,255,0.06);
}

/* ── Cards ─────────────────────────────────────────────────── */
.card {
  background: var(--glass);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.2);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.2);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  color: var(--text);
  box-shadow: var(--shadow-md);
  transition: all 240ms var(--ease);
  position: relative;
  overflow: hidden;
}
.card::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.36), transparent);
  opacity: 0.58;
  pointer-events: none;
}

.card:hover {
  border-color: rgba(204, 143, 158, 0.32);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(204, 143, 158, 0.10);
}

.card.narrow {
  max-width: 440px;
  margin: 0 auto;
}

.register-card {
  overflow: visible;
}

.card .card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--sp-2);
}

.card .card-desc,
.card p { color: var(--text-2); font-size: 14px; }

.card-head {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
}

.card-icon {
  width: 44px; height: 44px;
  border-radius: var(--r-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-bg);
  border: 1px solid rgba(224, 123, 135, 0.24);
  font-weight: 700;
  font-size: 16px;
  color: var(--accent);
  flex-shrink: 0;
}
.card-icon svg { width: 20px; height: 20px; fill: var(--accent); }

.card-body {
  color: var(--text-2);
  font-size: 13px;
  margin: var(--sp-2) 0 var(--sp-3);
}

.card-footer {
  margin-top: auto;
  display: flex;
  gap: var(--sp-2);
  align-items: center;
  flex-wrap: wrap;
}
.card-footer > * { flex: 0 0 auto; }
.card-footer form { display: inline-flex; align-items: center; gap: var(--sp-2); margin: 0; }

/* Clickable link-cards */
.link-card {
  text-decoration: none;
  color: inherit;
  display: block;
}
.link-card:hover,
.link-card:focus-visible,
.link-card:active {
  color: inherit;
}
.link-card.card {
  display: flex;
  flex-direction: column;
}
.link-card .card {
  height: 100%;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  will-change: transform;
}
.link-card.card {
  height: 100%;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  will-change: transform;
}
.link-card .card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(224, 123, 135, 0.10), transparent 62%);
  opacity: 0;
  transition: opacity 300ms var(--ease);
  pointer-events: none;
}
.link-card.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(224, 123, 135, 0.10), transparent 62%);
  opacity: 0;
  transition: opacity 300ms var(--ease);
  pointer-events: none;
}
.link-card:hover .card::before { opacity: 1; }
.link-card.card:hover::before { opacity: 1; }
.link-card:hover .card {
  transform: translateY(-5px) scale(1.01);
  border-color: rgba(204, 143, 158, 0.44);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}
.link-card.card:hover {
  transform: translateY(-5px) scale(1.01);
  border-color: rgba(204, 143, 158, 0.44);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* Admin card tweaks */
.admin-card {
  padding: var(--sp-5);
  display: flex;
  flex-direction: column;
}

.user-card .card-head { margin-bottom: var(--sp-2); }
.student-management-card .card-body {
  display: grid;
  gap: 6px;
}

/* ── Hero ──────────────────────────────────────────────────── */
.hero {
  padding: var(--sp-8) var(--sp-6);
  background: var(--glass);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--sp-6);
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  top: -80px; right: -60px;
  width: 340px; height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(199, 120, 139, 0.20), transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -100px; left: -40px;
  width: 260px; height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.16), transparent 70%);
  pointer-events: none;
}

.hero h1 {
  margin-bottom: var(--sp-3);
  background: linear-gradient(135deg, #f3f6ff 30%, #cfd8ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-grid {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: var(--sp-8);
  align-items: center;
}

.hero-left {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-right { position: relative; }

.hero-subtitle {
  color: var(--text-2);
  font-size: 15px;
  max-width: 600px;
  line-height: 1.6;
  margin-bottom: var(--sp-5);
}

.logo-full {
  width: 100%;
  max-width: 400px;
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
}

/* Hero insight card */
.hero-insight-card {
  width: 100%;
  max-width: 440px;
  padding: var(--sp-5);
  border-radius: var(--r-lg);
  border: 1px solid var(--glass-border);
  background:
    radial-gradient(200px 110px at 15% 10%, rgba(166, 103, 124, 0.2), transparent 68%),
    radial-gradient(220px 130px at 90% 0%, rgba(125, 150, 214, 0.16), transparent 66%),
    var(--surface-1);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
}

.hero-insight-card::after {
  content: "";
  position: absolute;
  top: -28px; right: -18px;
  width: 100px; height: 100px;
  border-radius: 50%;
  border: 1px dashed rgba(255,255,255,0.10);
  opacity: 0.5;
  pointer-events: none;
}

.hero-insight-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-bottom: var(--sp-3);
}

.hero-insight-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

.hero-insight-chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--r-full);
  font-size: 12px;
  font-weight: 700;
  color: var(--success);
  background: var(--success-bg);
  border: 1px solid rgba(52,211,153,0.25);
}

.hero-insight-chart {
  border-radius: var(--r-md);
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.02);
  padding: var(--sp-1);
  margin-bottom: var(--sp-3);
}
.hero-insight-chart svg { width: 100%; height: 160px; display: block; }

.hero-line {
  stroke-dasharray: 820;
  stroke-dashoffset: 820;
  animation: heroLineIn 1.8s var(--ease) forwards;
}
.hero-area { opacity: 0; animation: heroFadeIn 1.2s var(--ease) 0.25s forwards; }
.hero-point { fill: var(--accent); opacity: 0; animation: heroPointIn 0.45s var(--ease) forwards; }
.hero-point-final {
  fill: var(--info);
  filter: drop-shadow(0 0 8px rgba(96, 165, 250, 0.4));
  animation: heroPointIn 0.45s var(--ease) forwards, heroPulse 2.3s ease-in-out 1.2s infinite;
}

.hero-insight-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-2);
}

.metric-pill {
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-sm);
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.03);
}
.metric-name  { font-size: 11px; color: var(--text-3); display: block; }
.metric-value { font-size: 14px; font-weight: 700; color: var(--text); }
.metric-up      { color: var(--success); }
.metric-down    { color: var(--danger); }
.metric-neutral { color: var(--text-2); }

@keyframes heroLineIn  { to { stroke-dashoffset: 0; } }
@keyframes heroFadeIn  { to { opacity: 1; } }
@keyframes heroPointIn { to { opacity: 1; } }
@keyframes heroPulse   { 0%,100% { transform: scale(1); } 50% { transform: scale(1.25); } }

@keyframes ambientShift {
  0% {
    background-position: 0% 0%, 100% 0%, 50% 100%;
  }
  50% {
    background-position: 14% 6%, 88% 8%, 52% 88%;
  }
  100% {
    background-position: 6% 14%, 94% 3%, 46% 94%;
  }
}

@keyframes pageReveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spotlightDrift {
  0% {
    background-position: 0% 0%, 100% 0%, 0 0;
  }
  100% {
    background-position: 8% 10%, 92% 12%, 0 0;
  }
}

/* ── Spotlight (Home) ─────────────────────────────────────── */
.spotlight {
  margin-bottom: var(--sp-6);
}

.spotlight-stage {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(240px, 320px);
  gap: var(--sp-6);
  padding: clamp(22px, 3vw, 36px);
  border-radius: var(--r-xl);
  border: 1px solid rgba(210, 144, 158, 0.30);
  background:
    linear-gradient(115deg, rgba(122, 56, 73, 0.24) 0%, rgba(26, 31, 48, 0.93) 44%, rgba(12, 16, 30, 0.93) 100%),
    radial-gradient(480px 220px at 88% 12%, rgba(162, 109, 136, 0.18), transparent 72%),
    var(--glass);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(210, 144, 158, 0.10);
  overflow: hidden;
  background-size: 120% 120%, 150% 150%, auto;
  background-position: 0% 0%, 100% 0%, 0 0;
  animation: spotlightDrift 18s ease-in-out infinite alternate;
}

.spotlight-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(95deg, rgba(193, 126, 146, 0.16), transparent 34%),
    radial-gradient(circle at 76% 50%, rgba(151, 166, 214, 0.12), transparent 38%);
  pointer-events: none;
}

.spotlight-stage::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -140px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  border: 1px solid rgba(173, 136, 157, 0.20);
  background: radial-gradient(circle, rgba(173, 136, 157, 0.18), transparent 68%);
  pointer-events: none;
}

.spotlight-content,
.spotlight-panel {
  position: relative;
  z-index: 1;
}

.spotlight-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--r-full);
  border: 1px solid rgba(206, 152, 166, 0.32);
  background: rgba(122, 56, 73, 0.18);
  color: #f1d6dc;
  font-weight: 700;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--sp-3);
}

.spotlight-content h1 {
  margin-bottom: var(--sp-3);
  font-size: clamp(2rem, 4.2vw, 3.25rem);
  letter-spacing: -0.03em;
  line-height: 1.02;
  text-wrap: balance;
  background: linear-gradient(125deg, #f3f7ff 12%, #f0d6de 56%, #c9d7ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.spotlight-text {
  max-width: 680px;
  font-size: 15px;
  color: #c4cede;
  margin-bottom: var(--sp-4);
}

.spotlight-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
}

.spotlight-meta span {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--r-full);
  border: 1px solid rgba(176, 153, 177, 0.22);
  background: rgba(255, 255, 255, 0.03);
  font-size: 12px;
  font-weight: 600;
  color: #d6dced;
}

.spotlight-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.spotlight-panel {
  border: 1px solid rgba(186, 157, 177, 0.24);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015));
  backdrop-filter: blur(10px);
  overflow: hidden;
}
.spotlight-panel::before {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(231, 213, 224, 0.55), transparent);
  pointer-events: none;
}
.spotlight-panel::after {
  content: "";
  position: absolute;
  right: -38px;
  bottom: -38px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  border: 1px solid rgba(193, 171, 190, 0.2);
  background: radial-gradient(circle, rgba(193, 171, 190, 0.16), transparent 72%);
  pointer-events: none;
}

.spotlight-panel-title {
  text-transform: uppercase;
  font-size: 11px;
  font-weight: 700;
  color: #bac5d8;
  letter-spacing: 0.12em;
  margin-bottom: var(--sp-2);
}

.spotlight-panel-value {
  font-size: clamp(2rem, 4vw, 2.5rem);
  line-height: 1;
  font-weight: 800;
  margin-bottom: var(--sp-1);
  color: #e9edf8;
}

.spotlight-panel-hint {
  color: #9aabc8;
  font-size: 13px;
  margin-bottom: var(--sp-3);
}

.spotlight-mini-chart {
  width: 100%;
  height: auto;
  margin-bottom: var(--sp-3);
}

.spotlight-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.spotlight-badge {
  display: inline-flex;
  align-items: center;
  border-radius: var(--r-full);
  padding: 6px 12px;
  border: 1px solid rgba(206, 152, 166, 0.28);
  background: rgba(122, 56, 73, 0.16);
  color: #f0d9de;
  font-size: 12px;
  font-weight: 700;
}

.spotlight-badge.muted {
  background: rgba(255, 255, 255, 0.03);
  color: #b8c3d7;
  border-color: rgba(186, 157, 177, 0.22);
}

.route-home .grid .link-card:nth-child(1) .card-icon {
  background: rgba(96, 165, 250, 0.18);
  border-color: rgba(96, 165, 250, 0.28);
  color: #93c5fd;
}
.route-home .grid .link-card:nth-child(1) .card-icon svg { fill: #93c5fd; }

.route-home .grid .link-card:nth-child(2) .card-icon {
  background: rgba(224, 123, 135, 0.18);
  border-color: rgba(224, 123, 135, 0.28);
  color: #f1b6c0;
}
.route-home .grid .link-card:nth-child(2) .card-icon svg { fill: #f1b6c0; }

.route-home .grid .link-card:nth-child(3) .card-icon {
  background: rgba(52, 211, 153, 0.16);
  border-color: rgba(52, 211, 153, 0.28);
  color: #6ee7b7;
}
.route-home .grid .link-card:nth-child(3) .card-icon svg { fill: #6ee7b7; }

/* ── Grids ─────────────────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--sp-5);
  margin-top: var(--sp-5);
}

.list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-4);
}

.grid > .card, .list > .card,
.grid > .link-card, .list > .link-card { height: 100%; }

.grid > .card,
.list > .card {
  display: flex;
  flex-direction: column;
}

.grid > .link-card > .card,
.list > .link-card > .card {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.grid > .card > .actions-inline:last-child,
.list > .card > .actions-inline:last-child {
  margin-top: auto;
  padding-top: var(--sp-2);
}

/* ── Groups Grid ───────────────────────────────────────────── */
.groups-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-4);
}

.group-column { padding: 0; overflow: hidden; }
.group-column .group-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  background: transparent;
  border: none;
  color: var(--text);
  font-weight: 700;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
}
.group-column .group-arrow {
  display: inline-block;
  width: 18px;
  text-align: center;
  transition: transform var(--dur) var(--ease);
  color: var(--text-3);
}
.group-column .group-members { display: none; padding: var(--sp-3); }
.group-column.open .group-arrow { transform: rotate(90deg); }
.group-column.open .group-members { display: grid; gap: var(--sp-3); }
.group-column.card { border-radius: var(--r-lg); }
.group-column .card { box-shadow: none; }

.groups-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-3);
}

.group-link-card {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 110px;
  padding: 8px 16px;
  border-radius: var(--r-md);
  text-decoration: none;
  color: var(--text-2);
  border: 1px solid var(--glass-border);
  background: var(--surface-3);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--dur) var(--ease);
}
.group-link-card:hover {
  border-color: rgba(204, 143, 158, 0.40);
  color: var(--text);
  background: var(--accent-bg);
  transform: translateY(-1px);
}

/* ── Teacher Chips & Tabs ──────────────────────────────────── */
.teachers-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.teacher-chip {
  padding: 6px 14px;
  border-radius: var(--r-full);
  border: 1px solid rgba(204, 143, 158, 0.30);
  background: var(--accent-bg);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--dur) var(--ease);
}
.teacher-chip:hover {
  background: rgba(224, 123, 135, 0.18);
  border-color: rgba(204, 143, 158, 0.44);
  color: #f3dbe0;
}

.teacher-v2-tabs {
  display: flex;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
  flex-wrap: wrap;
  padding: var(--sp-1);
  background: rgba(255,255,255,0.03);
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
}

.tab-link {
  text-decoration: none;
  color: var(--text-3);
  padding: 8px 18px;
  border-radius: var(--r-sm);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--dur) var(--ease);
  border: 1px solid transparent;
}
.tab-link:hover {
  color: var(--text);
  background: rgba(255,255,255,0.05);
}
.tab-link.active {
  color: var(--text);
  background: var(--accent-bg);
  border-color: rgba(204, 143, 158, 0.38);
}

/* Admin section nav */
.admin-section-nav {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
  padding: var(--sp-1);
  background: rgba(255,255,255,0.03);
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
  margin-bottom: var(--sp-4);
}

/* ── Stats ─────────────────────────────────────────────────── */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(155px, 1fr));
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
}

.stat {
  background: var(--glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 240ms var(--ease);
}
.stat:hover {
  border-color: rgba(204, 143, 158, 0.32);
  transform: translateY(-2px);
}
.stat::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-bold), #c794a0);
  border-radius: var(--r-lg) var(--r-lg) 0 0;
}
.stat-label {
  display: block;
  color: var(--text-3);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--sp-1);
}
.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text) 40%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Tables ────────────────────────────────────────────────── */
.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.table th,
.table td {
  padding: var(--sp-3) var(--sp-4);
  text-align: left;
  color: var(--text);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 14px;
}
.table thead th {
  background: rgba(123, 137, 178, 0.14);
  color: var(--text-2);
  font-weight: 700;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.table tbody tr { transition: background var(--dur) var(--ease); }
.table tbody tr:nth-child(even) { background: rgba(255,255,255,0.015); }
.table tbody tr:hover { background: rgba(123, 137, 178, 0.12); }
.table a { color: var(--accent); font-weight: 500; }
.table a:hover { color: #cfd8ff; }

/* ── Forms ─────────────────────────────────────────────────── */
input,
select,
textarea {
  width: 100%;
  padding: 10px 14px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--r-md);
  margin-bottom: var(--sp-4);
  min-height: 42px;
  transition: all var(--dur) var(--ease);
}
input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: rgba(255,255,255,0.07);
}
input::placeholder,
textarea::placeholder {
  color: var(--text-3);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
  cursor: pointer;
}
select option {
  background: #0f172a;
  color: var(--text);
}

input[type="file"] {
  padding: 8px;
  cursor: pointer;
}
input[type="file"]::file-selector-button {
  margin-right: 10px;
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: var(--r-sm);
  padding: 8px 12px;
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
}

/* Auth forms */
.auth-form input,
.auth-form select,
.auth-form textarea {
  background: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.12);
}

.auth-role-select { cursor: pointer; }

.card.narrow h2 {
  text-align: center;
  margin-bottom: var(--sp-5);
  background: linear-gradient(135deg, var(--text) 30%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Custom select */
.custom-select { position: relative; margin-bottom: var(--sp-4); }
.custom-select-trigger {
  width: 100%;
  min-height: 42px;
  padding: 10px 14px;
  border-radius: var(--r-md);
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.05);
  color: var(--text);
  text-align: left;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}
.custom-select-trigger:hover { border-color: rgba(255,255,255,0.20); }

.custom-select-menu {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0; right: 0;
  z-index: 50;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--r-md);
  overflow: hidden;
  background: #0f172a;
  box-shadow: var(--shadow-lg);
  max-height: 240px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  touch-action: pan-y;
}
.custom-select.open .custom-select-menu { display: block; }

.custom-select-option {
  width: 100%;
  border: 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  background: transparent;
  color: var(--text-2);
  padding: 10px 14px;
  text-align: left;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}
.custom-select-option:last-child { border-bottom: 0; }
.custom-select-option:hover,
.custom-select-option.is-selected {
  background: var(--accent-bg);
  color: var(--text);
}
.custom-select.is-disabled .custom-select-trigger { opacity: 0.5; cursor: not-allowed; }

/* ── Actions / toolbars ────────────────────────────────────── */
.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-3);
  margin-top: var(--sp-5);
}

.actions-inline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
}

.card .actions-inline,
.card .card-footer {
  align-items: stretch;
  gap: var(--sp-2);
}

.card .actions-inline > .button,
.card .actions-inline > a.button,
.card .card-footer > .button,
.card .card-footer > a.button {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.card .actions-inline form,
.card .card-footer form {
  display: inline-flex;
  align-items: stretch;
}

.card .actions-inline form .button,
.card .card-footer form .button {
  min-height: 40px;
}

.student-card-group-form {
  margin: var(--sp-2) 0 0;
}

.student-card-group-form select,
.student-card-group-form .button {
  min-width: 0;
}

.student-card-actions {
  margin-top: auto;
  padding-top: var(--sp-2);
}

.student-card-actions > .button,
.student-card-actions > a.button,
.student-card-actions > form {
  flex: 1 1 0;
  min-width: 0;
}

.student-card-actions .button,
.student-card-actions form .button {
  width: 100%;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.table-wrap .table { margin-bottom: 0; }
.actions-inline form {
  display: inline-flex;
  align-items: center;
  margin: 0;
}

.review-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 5px 11px;
  border-radius: var(--r-full);
  border: 1px solid transparent;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.review-link-default {
  color: var(--accent);
}

.review-link-default:hover {
  color: #f2a8b1;
}

.review-link-success {
  color: #86efac;
  background: var(--success-bg);
  border-color: rgba(52, 211, 153, 0.26);
}

.review-link-success:hover {
  color: #bbf7d0;
  background: rgba(52, 211, 153, 0.18);
}

.tests-create-card .card-desc {
  margin-bottom: var(--sp-2);
}

.tests-create-actions {
  margin-top: var(--sp-2);
  row-gap: var(--sp-2);
}

.tests-create-actions .button {
  flex: 0 0 auto;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}
.toolbar h2 { margin-bottom: 0; }

/* Inline forms */
.inline { display: inline; }

.inline-group-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)) auto;
  gap: var(--sp-3);
  align-items: stretch;
}
.inline-group-form > * { margin: 0; }
.inline-group-form input,
.inline-group-form select,
.inline-group-form .button { margin-bottom: 0; }

.create-user-form    { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)) auto; }
.create-group-form   { grid-template-columns: minmax(200px, 1.2fr) minmax(200px, 1fr) auto; }
.assign-group-form   { grid-template-columns: minmax(240px, 1.2fr) minmax(200px, 1fr) auto; }
.create-teacher-form { grid-template-columns: repeat(3, minmax(180px, 1fr)) auto auto; }
.profile-name-form   { grid-template-columns: minmax(220px, 1fr) auto; }
.profile-password-form { grid-template-columns: repeat(3, minmax(180px, 1fr)) auto; }

.group-change-row { margin: var(--sp-2) 0 var(--sp-3); }

/* User search */
.user-search {
  display: grid !important;
  grid-template-columns: 1fr auto;
  gap: var(--sp-2);
  align-items: stretch;
}
.user-search input,
.user-search .button { margin: 0; }

.admin-student-groups {
  display: grid;
  gap: var(--sp-4);
}
.admin-student-group {
  padding: 0;
  overflow: hidden;
}
.admin-student-group-title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}
.admin-student-group .group-toggle {
  width: 100%;
}
.admin-student-group.open .group-toggle {
  border-bottom: 1px solid var(--glass-border);
}
.admin-student-group-members {
  padding: var(--sp-3);
}
.admin-student-group-list {
  margin-top: 0;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

/* ── Flashes / Alerts ──────────────────────────────────────── */
.flash {
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-md);
  margin: var(--sp-3) 0;
  font-weight: 600;
  font-size: 14px;
  border: 1px solid var(--glass-border);
  border-left-width: 4px;
  backdrop-filter: blur(8px);
}
.flash-success { background: var(--success-bg); border-left-color: var(--success); color: #a7f3d0; }
.flash-error   { background: var(--danger-bg);  border-left-color: var(--danger);  color: #fecaca; }
.flash-info    { background: var(--info-bg);     border-left-color: var(--info);    color: #dbeafe; }

.alert {
  background: var(--danger-bg);
  color: #fecaca;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-md);
  margin-bottom: var(--sp-4);
  border: 1px solid rgba(248,113,113,0.20);
  font-size: 14px;
}

/* ── Questions / Test UI ───────────────────────────────────── */
.question {
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-5);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.question:last-child { border-bottom: none; }

.question-text,
.question h3,
.question p,
.question .option-text,
.attempt-option-text {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.question-text { font-size: 15px; margin-bottom: var(--sp-3); color: var(--text); }

.options .option-row {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
  margin-bottom: var(--sp-2);
  width: 100%;
}

.options .option-row input[type="radio"] {
  width: 20px !important;
  min-width: 20px !important;
  max-width: 20px !important;
  height: 20px !important;
  min-height: 20px !important;
  padding: 0 !important;
  margin: 0 !important;
  flex: 0 0 20px !important;
  appearance: auto;
  accent-color: var(--accent);
}

.options .option-row input[type="text"] {
  flex: 1 1 0% !important;
  width: auto !important;
  min-width: 0 !important;
  margin-bottom: 0 !important;
}

.radio {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  margin-bottom: var(--sp-3);
  cursor: pointer;
  padding: var(--sp-3);
  border-radius: var(--r-md);
  border: 1px solid transparent;
  transition: all var(--dur) var(--ease);
}
.radio:hover {
  background: rgba(255,255,255,0.03);
  border-color: rgba(255,255,255,0.08);
}

.radio input[type="radio"] {
  width: 18px; min-width: 18px;
  height: 18px; min-height: 18px;
  margin: 2px 0 0;
  padding: 0;
  border: 0;
  border-radius: 50%;
  box-shadow: none;
  background: transparent;
  appearance: auto;
  flex: 0 0 auto;
  accent-color: var(--accent);
}

.radio .option-text {
  display: inline-block;
  min-width: 0;
  max-width: 100%;
  line-height: 1.5;
  font-size: 14px;
}

/* ── Attempt Review ────────────────────────────────────────── */
.attempt-review-list { margin-top: var(--sp-4); }

.attempt-review-item { border-width: 1px; }
.attempt-review-item.attempt-ok    { border-color: rgba(52,211,153,0.30); }
.attempt-review-item.attempt-wrong { border-color: rgba(248,113,113,0.30); }

.attempt-options { display: grid; gap: var(--sp-3); margin-top: var(--sp-3); }

.attempt-option {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--sp-3);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-md);
  padding: var(--sp-3) var(--sp-4);
  transition: all var(--dur) var(--ease);
}
.attempt-option.is-correct        { border-color: rgba(52,211,153,0.40); background: var(--success-bg); }
.attempt-option.is-selected-wrong { border-color: rgba(248,113,113,0.40); background: var(--danger-bg); }
.attempt-option.is-selected-correct { border-width: 2px; }

.attempt-option-text {
  color: var(--text);
  min-width: 0;
  max-width: 100%;
  flex: 1 1 auto;
  padding-right: var(--sp-2);
}

.attempt-badge {
  display: inline-flex;
  align-items: center;
  border-radius: var(--r-full);
  padding: 3px 12px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  margin-left: auto;
  flex-shrink: 0;
}
.badge-correct, .badge-right { background: var(--success-bg); color: #a7f3d0; border: 1px solid rgba(52,211,153,0.25); }
.badge-wrong { background: var(--danger-bg); color: #fecaca; border: 1px solid rgba(248,113,113,0.25); }

/* ── Charts / Sparklines ───────────────────────────────────── */
.chart-card { margin-bottom: var(--sp-5); }

.sparkline { width: 100%; height: 80px; }
.sparkline polyline {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.sparkline-labels {
  display: flex;
  justify-content: space-between;
  color: var(--text-3);
  font-size: 12px;
  margin-top: var(--sp-1);
}

/* Bar charts */
.chart-bars { display: grid; gap: var(--sp-2); }
.bar-row {
  display: grid;
  grid-template-columns: 160px 1fr 50px;
  gap: var(--sp-3);
  align-items: center;
}
.bar-track {
  height: 8px;
  border-radius: var(--r-full);
  background: rgba(255,255,255,0.06);
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  border-radius: var(--r-full);
  background: linear-gradient(90deg, var(--accent-bold), var(--accent));
  transition: width 0.6s var(--ease);
}
.bar-label { font-size: 13px; color: var(--text-2); }
.bar-value { font-size: 13px; color: var(--text); font-weight: 600; text-align: right; }

/* Teacher trend chart */
.teacher-trend-chart svg { border-radius: var(--r-md); }

/* ── Growth Topics ─────────────────────────────────────────── */
.growth-topics-list { margin-top: var(--sp-4); }
.growth-topic-card p { margin-bottom: var(--sp-3); }
.growth-mistakes-card { margin-top: var(--sp-4); }
.growth-mistakes-list { display: grid; gap: var(--sp-3); }

.growth-mistake-item {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-md);
  padding: var(--sp-4);
  background: rgba(255,255,255,0.02);
  transition: all var(--dur) var(--ease);
}
.growth-mistake-item:hover { border-color: rgba(255,255,255,0.14); }

.growth-mistake-head {
  display: flex;
  justify-content: space-between;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
}
.growth-label   { color: var(--text-3); }
.growth-wrong   { color: #fca5a5; }
.growth-correct { color: #86efac; }

/* ── Lecture Detail ─────────────────────────────────────────── */
.lecture-body-wrap { margin-bottom: var(--sp-4); }
.lecture-body {
  margin: 0 0 var(--sp-3);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  color: var(--text-2);
  line-height: 1.7;
}
.lecture-body.is-collapsed { max-height: 220px; overflow: hidden; }
.lecture-body-toggle { margin-left: 0; }

/* ── Generate / Import Status ──────────────────────────────── */
.generate-loading {
  margin-top: var(--sp-3);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-md);
  border: 1px solid rgba(204, 143, 158, 0.34);
  background: var(--accent-bg);
  color: #f0d8de;
  font-weight: 600;
  font-size: 14px;
}
.generate-loading[hidden] { display: none !important; }
.generate-loading-spinner {
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(240, 216, 222, 0.32);
  border-top-color: #f0d8de;
  animation: spin 0.9s linear infinite;
}

.import-status {
  margin-top: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-md);
  border: 1px solid rgba(204, 143, 158, 0.34);
  background: var(--accent-bg);
  color: #f0d8de;
  font-weight: 600;
  font-size: 14px;
}
.import-status.is-loading { border-color: rgba(96, 165, 250, 0.36); background: var(--info-bg); color: #dbeafe; }
.import-status.is-success { border-color: rgba(52,211,153,0.35); background: var(--success-bg); color: #a7f3d0; }
.import-status.is-error   { border-color: rgba(248,113,113,0.35); background: var(--danger-bg); color: #fecaca; }

#generate-test-form.is-generating #generate-test-submit { cursor: not-allowed; opacity: 0.6; }

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

/* ── QR code ───────────────────────────────────────────────── */
.qr-code-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-4);
}
.qr-code-container img {
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
}

/* ── Focus States ──────────────────────────────────────────── */
.button:focus-visible,
.link-button:focus-visible,
a:focus-visible,
.theme-toggle:focus-visible,
.custom-select-trigger:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ── Light Theme ───────────────────────────────────────────── */
html[data-theme="light"] {
  --bg:          #f3f6fb;
  --bg-soft:     #e7edf7;
  --surface-1:   rgba(255, 255, 255, 0.88);
  --surface-2:   rgba(248, 251, 255, 0.82);
  --surface-3:   rgba(15, 23, 42, 0.04);

  --glass:       rgba(255, 255, 255, 0.78);
  --glass-border:rgba(120, 138, 170, 0.24);

  --text:        #1f2a3d;
  --text-2:      #4f5f79;
  --text-3:      #73839f;

  --accent:      #b95d6d;
  --accent-bold: #995062;
  --accent-cool: #5b7dbf;
  --accent-glow: rgba(185, 93, 109, 0.20);
  --accent-bg:   rgba(185, 93, 109, 0.12);

  --shadow-sm:   0 2px 10px rgba(27, 39, 61, 0.08);
  --shadow-md:   0 10px 28px rgba(27, 39, 61, 0.14);
  --shadow-lg:   0 18px 45px rgba(27, 39, 61, 0.18);
}

html[data-theme="light"] body {
  background-image:
    radial-gradient(ellipse 980px 520px at 12% 0%, rgba(96, 165, 250, 0.18), transparent 62%),
    radial-gradient(ellipse 680px 380px at 88% 4%, rgba(185, 93, 109, 0.12), transparent 58%),
    radial-gradient(ellipse 760px 320px at 50% 100%, rgba(15, 23, 42, 0.08), transparent 58%);
}

html[data-theme="light"] a:hover { color: #a04f60; }

html[data-theme="light"] .site-header {
  background: rgba(247, 250, 255, 0.92);
  border-bottom-color: rgba(120, 138, 170, 0.26);
}
html[data-theme="light"] .site-header::after {
  background: linear-gradient(90deg, transparent, rgba(91, 125, 191, 0.34), rgba(185, 93, 109, 0.30), transparent);
}
html[data-theme="light"] .brand-name {
  color: #1f2a3d;
}
html[data-theme="light"] .brand-role {
  color: #60718f;
}
html[data-theme="light"] .brand-logo-shell {
  border-color: rgba(112, 130, 161, 0.34);
  background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.94), rgba(226, 235, 249, 0.84));
  box-shadow: 0 8px 16px rgba(19, 35, 63, 0.12);
}
html[data-theme="light"] .brand:hover .brand-name {
  color: #2d456e;
}
html[data-theme="light"] .brand:hover .brand-role {
  color: #4d6184;
}

html[data-theme="light"] .header-search::before {
  border-color: rgba(113, 131, 164, 0.64);
}
html[data-theme="light"] .header-search::after {
  background: rgba(113, 131, 164, 0.64);
}
html[data-theme="light"] .header-search input {
  background: rgba(255, 255, 255, 0.78);
  border-color: rgba(120, 138, 170, 0.35);
}
html[data-theme="light"] .header-search input::placeholder {
  color: #7a8cae;
}
html[data-theme="light"] .header-search input:focus {
  border-color: rgba(91, 125, 191, 0.55);
  box-shadow: 0 0 0 3px rgba(91, 125, 191, 0.18);
}

html[data-theme="light"] .theme-toggle {
  background: transparent;
  border-color: transparent;
}
html[data-theme="light"] .theme-toggle:hover {
  background: transparent;
}
html[data-theme="light"] .theme-toggle-track {
  background: linear-gradient(145deg, rgba(187, 199, 223, 0.86), rgba(161, 177, 208, 0.88));
  border-color: rgba(110, 129, 163, 0.46);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.68),
    0 8px 18px rgba(59, 87, 135, 0.16);
}
html[data-theme="light"] .theme-toggle-dot {
  background: radial-gradient(circle at 38% 30%, #ffffff 0%, #e8f0ff 66%, #c8d8ef 100%);
  box-shadow: 0 2px 8px rgba(38, 54, 80, 0.26);
}
html[data-theme="light"] .theme-toggle:not([aria-checked="true"]) .theme-toggle-dot::before {
  color: #556a95;
}
html[data-theme="light"] .theme-toggle[aria-checked="true"] .theme-toggle-track {
  background: linear-gradient(145deg, rgba(185, 116, 136, 0.82), rgba(123, 95, 165, 0.78));
  border-color: rgba(172, 111, 132, 0.62);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.50),
    0 10px 18px rgba(119, 74, 100, 0.24);
}
html[data-theme="light"] .theme-toggle[aria-checked="true"] .theme-toggle-dot {
  background: radial-gradient(circle at 34% 30%, #f5ecd1 0%, #ebc976 62%, #c9984e 100%);
}
html[data-theme="light"] .theme-toggle[aria-checked="true"] .theme-toggle-dot::before {
  color: #8a611d;
}

html[data-theme="light"] .nav a:not(.button):hover,
html[data-theme="light"] .nav .link-button:hover {
  background: rgba(15, 23, 42, 0.07);
}
html[data-theme="light"] .nav-link::before {
  background: rgba(15, 23, 42, 0.05);
  border-color: rgba(15, 23, 42, 0.12);
}
html[data-theme="light"] .nav-toggle {
  border-color: rgba(120, 138, 170, 0.34);
  background: rgba(15, 23, 42, 0.04);
}
html[data-theme="light"] .nav-toggle:hover {
  background: rgba(15, 23, 42, 0.08);
}
html[data-theme="light"] .nav-toggle-line {
  background: #415473;
}

html[data-theme="light"] .nav a.button {
  background: linear-gradient(135deg, #4e6289 0%, #6586c5 100%);
  border-color: rgba(79, 104, 153, 0.46);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(79, 104, 153, 0.22);
}
html[data-theme="light"] .nav a.button:hover {
  background: linear-gradient(135deg, #3f557f 0%, #587ab8 100%);
  color: #ffffff;
}
html[data-theme="light"] .button.secondary {
  background: rgba(15, 23, 42, 0.04);
  border-color: rgba(120, 138, 170, 0.32);
  color: #24324a;
}
html[data-theme="light"] .button.secondary:hover {
  background: rgba(15, 23, 42, 0.09);
}

html[data-theme="light"] .card::after {
  background: linear-gradient(90deg, transparent, rgba(85, 106, 146, 0.28), transparent);
}
html[data-theme="light"] .card:hover {
  border-color: rgba(155, 118, 144, 0.36);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(155, 118, 144, 0.12);
}
html[data-theme="light"] .link-card .card::before {
  background: linear-gradient(140deg, rgba(185, 93, 109, 0.08), rgba(96, 165, 250, 0.08) 55%, transparent 75%);
}
html[data-theme="light"] .link-card.card::before {
  background: linear-gradient(140deg, rgba(185, 93, 109, 0.08), rgba(96, 165, 250, 0.08) 55%, transparent 75%);
}

html[data-theme="light"] .spotlight-stage {
  border-color: rgba(120, 138, 170, 0.32);
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.92) 0%, rgba(245, 248, 255, 0.92) 45%, rgba(237, 242, 251, 0.96) 100%),
    radial-gradient(480px 220px at 88% 12%, rgba(186, 200, 228, 0.36), transparent 72%),
    rgba(255, 255, 255, 0.86);
  box-shadow: 0 16px 34px rgba(36, 43, 68, 0.12), 0 0 0 1px rgba(148, 163, 184, 0.20);
}
html[data-theme="light"] .spotlight-stage::before {
  background:
    linear-gradient(95deg, rgba(185, 93, 109, 0.08), transparent 34%),
    radial-gradient(circle at 76% 50%, rgba(91, 125, 191, 0.10), transparent 38%);
}
html[data-theme="light"] .spotlight-stage::after {
  border-color: rgba(148, 163, 184, 0.24);
  background: radial-gradient(circle, rgba(148, 163, 184, 0.17), transparent 68%);
}
html[data-theme="light"] .spotlight-tag {
  border-color: rgba(185, 93, 109, 0.28);
  background: rgba(185, 93, 109, 0.12);
  color: #7f3446;
}
html[data-theme="light"] .spotlight-content h1 {
  background: linear-gradient(120deg, #1f2a3d 12%, #7f3446 56%, #4163a8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
html[data-theme="light"] .spotlight-text {
  color: #4f5f79;
}
html[data-theme="light"] .spotlight-meta span {
  border-color: rgba(120, 138, 170, 0.26);
  background: rgba(15, 23, 42, 0.03);
  color: #3c4f6e;
}
html[data-theme="light"] .spotlight-panel {
  border-color: rgba(120, 138, 170, 0.28);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.75), rgba(244, 248, 255, 0.70));
}
html[data-theme="light"] .spotlight-panel::before {
  background: linear-gradient(90deg, transparent, rgba(91, 125, 191, 0.30), transparent);
}
html[data-theme="light"] .spotlight-panel::after {
  border-color: rgba(148, 163, 184, 0.28);
  background: radial-gradient(circle, rgba(148, 163, 184, 0.12), transparent 72%);
}
html[data-theme="light"] .spotlight-panel-title {
  color: #5d7398;
}
html[data-theme="light"] .spotlight-panel-value {
  color: #1f2a3d;
}
html[data-theme="light"] .spotlight-panel-hint {
  color: #61789f;
}
html[data-theme="light"] .spotlight-badge {
  border-color: rgba(185, 93, 109, 0.30);
  background: rgba(185, 93, 109, 0.11);
  color: #803847;
}
html[data-theme="light"] .spotlight-badge.muted {
  border-color: rgba(120, 138, 170, 0.30);
  background: rgba(15, 23, 42, 0.03);
  color: #526886;
}

html[data-theme="light"] .teacher-chip:hover {
  color: #7a3a49;
}

html[data-theme="light"] .table tbody tr:nth-child(even) {
  background: rgba(15, 23, 42, 0.02);
}
html[data-theme="light"] .table tbody tr:hover {
  background: rgba(96, 165, 250, 0.12);
}
html[data-theme="light"] .table a:hover {
  color: #3f63ab;
}

html[data-theme="light"] .review-link-default {
  color: #a54f5f;
}

html[data-theme="light"] .review-link-default:hover {
  color: #8b3d4d;
}

html[data-theme="light"] .review-link-success {
  color: #065f46;
  background: rgba(16, 185, 129, 0.14);
  border-color: rgba(16, 185, 129, 0.26);
}

html[data-theme="light"] .review-link-success:hover {
  color: #064e3b;
  background: rgba(16, 185, 129, 0.2);
}

html[data-theme="light"] .flash-success {
  background: rgba(16, 185, 129, 0.14);
  border-color: rgba(16, 185, 129, 0.28);
  border-left-color: #10b981;
  color: #065f46;
}
html[data-theme="light"] .flash-error {
  background: rgba(239, 68, 68, 0.14);
  border-color: rgba(239, 68, 68, 0.26);
  border-left-color: #ef4444;
  color: #991b1b;
}
html[data-theme="light"] .flash-info {
  background: rgba(59, 130, 246, 0.14);
  border-color: rgba(59, 130, 246, 0.26);
  border-left-color: #3b82f6;
  color: #1e3a8a;
}

html[data-theme="light"] .attempt-option.is-correct {
  border-color: rgba(16, 185, 129, 0.36);
  background: rgba(16, 185, 129, 0.12);
}
html[data-theme="light"] .attempt-option.is-selected-wrong {
  border-color: rgba(239, 68, 68, 0.36);
  background: rgba(239, 68, 68, 0.12);
}
html[data-theme="light"] .badge-correct,
html[data-theme="light"] .badge-right {
  background: rgba(16, 185, 129, 0.20);
  color: #065f46;
  border-color: rgba(16, 185, 129, 0.36);
}
html[data-theme="light"] .badge-wrong {
  background: rgba(239, 68, 68, 0.20);
  color: #991b1b;
  border-color: rgba(239, 68, 68, 0.36);
}

html[data-theme="light"] input,
html[data-theme="light"] select,
html[data-theme="light"] textarea,
html[data-theme="light"] .custom-select-trigger {
  background: rgba(255, 255, 255, 0.84);
  border-color: rgba(120, 138, 170, 0.34);
}
html[data-theme="light"] input:focus,
html[data-theme="light"] select:focus,
html[data-theme="light"] textarea:focus,
html[data-theme="light"] .custom-select-trigger:focus-visible {
  border-color: rgba(91, 125, 191, 0.58);
  box-shadow: 0 0 0 3px rgba(91, 125, 191, 0.16);
}
html[data-theme="light"] select option,
html[data-theme="light"] .custom-select-menu {
  background: #f9fbff;
  color: #24324a;
}

html[data-theme="light"] .generate-loading,
html[data-theme="light"] .import-status {
  color: #7a3a49;
}
html[data-theme="light"] .generate-loading-spinner {
  border-color: rgba(122, 58, 73, 0.24);
  border-top-color: #7a3a49;
}

html[data-theme="light"] ::selection {
  background: rgba(91, 125, 191, 0.28);
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--sp-5); }
  .hero-left { order: 2; }
  .hero-right { order: 1; }
  .hero-insight-card { max-width: none; }

  .spotlight-stage {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
    animation: none;
  }
  .spotlight-panel {
    max-width: 420px;
  }

  .site-header .container {
    align-items: center;
    flex-wrap: wrap;
  }
  .brand { order: 1; max-width: calc(100% - 140px); }
  .theme-toggle {
    order: 2;
    margin-left: auto;
  }
  .nav-toggle {
    display: inline-flex;
    margin-left: 0;
    order: 2;
  }
  .header-search {
    order: 3;
    flex: 1 1 100%;
    max-width: none;
    min-width: 0;
    margin-left: 0;
  }
  .nav {
    order: 4;
    width: 100%;
    flex-wrap: wrap;
    gap: var(--sp-2);
  }
  .nav .nav-link,
  .nav .button,
  .nav .link-button { justify-content: center; }

  body.has-js .site-header .nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    padding: var(--sp-3);
    border: 1px solid var(--glass-border);
    border-radius: var(--r-lg);
    background: rgba(12, 18, 32, 0.96);
    backdrop-filter: blur(16px) saturate(1.2);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
    z-index: 120;
  }
  html[data-theme="light"] body.has-js .site-header .nav {
    background: rgba(247, 250, 255, 0.98);
  }
  body.has-js .site-header .nav .nav-link,
  body.has-js .site-header .nav .button,
  body.has-js .site-header .nav .link-button {
    width: 100%;
    justify-content: flex-start;
  }
  body.has-js.nav-open .site-header .nav {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
  body.has-js.nav-open { overflow: hidden; }
}

@media (max-width: 760px) {
  .site-header .container {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--sp-3);
  }
  .header-search {
    order: 3;
    width: 100%;
  }
  .brand-logo-shell {
    width: 34px;
    height: 34px;
    border-radius: 10px;
  }
  .brand-logo {
    width: 24px;
    height: 24px;
  }
  .brand-role {
    display: none;
  }
  .theme-toggle {
    min-height: 34px;
    padding: 0;
  }
  .theme-toggle-track {
    width: 58px;
    height: 34px;
  }
  .theme-toggle-dot {
    width: 26px;
    height: 26px;
  }
  .theme-toggle[aria-checked="true"] .theme-toggle-dot {
    transform: translateX(26px);
  }
  .spotlight-content h1 {
    font-size: clamp(1.7rem, 7vw, 2.2rem);
  }
  .spotlight-text {
    font-size: 14px;
  }
  .button::after { display: none; }
  .hero { padding: var(--sp-5); }
  .container { padding: 0 var(--sp-4); }
  main.container { padding-top: var(--sp-5); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .bar-row { grid-template-columns: 100px 1fr 40px; }
  input, select, textarea, .custom-select-trigger { font-size: 16px; }

  .toolbar { flex-direction: column; align-items: stretch; }
  .toolbar .button { width: 100%; justify-content: center; }

  .table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .table th, .table td { white-space: nowrap; }

  .teacher-v2-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
  .teacher-v2-tabs .tab-link { flex: 0 0 auto; white-space: nowrap; }

  .groups-links {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
  }
  .group-link-card { flex: 0 0 auto; }

  .attempt-option {
    flex-direction: column;
    align-items: flex-start;
  }
  .attempt-option-text {
    width: 100%;
    padding-right: 0;
  }
  .attempt-badge {
    margin-left: 0;
  }
}

@media (max-width: 680px) {
  .user-search,
  .inline-group-form,
  .create-user-form,
  .create-group-form,
  .assign-group-form,
  .create-teacher-form { grid-template-columns: 1fr; }
  .inline-group-form .button { grid-column: 1 / -1; }

  .register-card .custom-select-menu {
    max-height: min(44vh, 280px);
  }
}

@media (max-width: 480px) {
  .grid, .list { grid-template-columns: 1fr; }
  .card { padding: var(--sp-4); border-radius: var(--r-md); }
  .stat-value { font-size: 22px; }
  h1 { font-size: 1.5rem; }
  .hero-insight-metrics { grid-template-columns: 1fr; }

  .spotlight-stage {
    padding: var(--sp-4);
    border-radius: var(--r-lg);
  }
  .spotlight-meta {
    display: grid;
    grid-template-columns: 1fr;
  }
  .spotlight-panel {
    padding: var(--sp-4);
  }
  .spotlight-tag {
    font-size: 11px;
    letter-spacing: 0.06em;
  }

  .hero { padding: var(--sp-4); }
  .hero-insight-chart svg { height: 132px; }
  .hero-subtitle { font-size: 14px; }

  .actions-inline,
  .actions {
    flex-direction: column;
    align-items: stretch;
  }
  .actions-inline .button,
  .actions .button,
  .actions-inline form,
  .actions form { width: 100%; }
  .actions-inline form .button,
  .actions form .button { width: 100%; }

  .brand {
    max-width: calc(100% - 56px);
    gap: 8px;
  }
  .brand-logo-shell {
    width: 34px;
    height: 34px;
    border-radius: 9px;
  }
  .brand-logo {
    width: 24px;
    height: 24px;
  }
  .brand-name {
    font-size: 15px;
  }
  .site-header { padding: 10px 0; }
  .site-header .container { gap: var(--sp-2); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
  main.container > * {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.10); border-radius: var(--r-full); }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.18); }

/* ── Selection ─────────────────────────────────────────────── */
::selection { background: rgba(123, 137, 178, 0.35); color: #fff; }