/* ── Light mode auth & modal variables ── */
:root {
  --auth-bg: rgba(37, 99, 235, 0.22);
  --auth-box-bg: linear-gradient(160deg, #fff 0%, #eff6ff 100%);
  --auth-box-border: rgba(37, 99, 235, 0.25);
  --auth-label: rgba(30, 64, 175, 0.65);
  --auth-input-bg: rgba(239, 246, 255, 1);
  --auth-input-border: rgba(37, 99, 235, 0.25);
  --auth-input-color: #2d2d2d;
  --auth-input-placeholder: rgba(30, 64, 175, 0.4);
  --auth-divider: rgba(37, 99, 235, 0.2);
  --auth-divider-text: rgba(30, 64, 175, 0.4);
  --auth-subtitle: rgba(30, 64, 175, 0.6);
  --auth-footer: rgba(30, 64, 175, 0.45);
  --auth-google-bg: rgba(37, 99, 235, 0.08);
  --auth-google-border: rgba(37, 99, 235, 0.22);
  --auth-google-color: #1e3a8a;
  --auth-google-hover: rgba(37, 99, 235, 0.15);
  --auth-stay: rgba(30, 64, 175, 0.55);
  --auth-stay-timeout: rgba(30, 64, 175, 0.35);
  --auth-pw-bar: rgba(37, 99, 235, 0.15);
  --auth-pw-label: rgba(30, 64, 175, 0.45);
  --auth-confirm-hint: rgba(30, 64, 175, 0.45);
  --auth-toggle-pw: rgba(30, 64, 175, 0.45);
  --studip-bg: var(--dp-bg);
  --studip-back-bg: rgba(37, 99, 235, 0.1);
  --studip-back-border: rgba(37, 99, 235, 0.2);
  --studip-back-color: #2563eb;
  --studip-subtitle: rgba(30, 64, 175, 0.5);
}
body.night {
  --auth-bg: rgba(10, 8, 18, 0.85);
  --auth-box-bg: linear-gradient(135deg, #0b1220, #0f172a);
  --auth-box-border: rgba(59, 130, 246, 0.25);
  --auth-label: rgba(255, 255, 255, 0.4);
  --auth-input-bg: rgba(255, 255, 255, 0.06);
  --auth-input-border: rgba(255, 255, 255, 0.1);
  --auth-input-color: #fff;
  --auth-input-placeholder: rgba(255, 255, 255, 0.3);
  --auth-divider: rgba(255, 255, 255, 0.1);
  --auth-divider-text: rgba(255, 255, 255, 0.25);
  --auth-subtitle: rgba(255, 255, 255, 0.45);
  --auth-footer: rgba(255, 255, 255, 0.35);
  --auth-google-bg: rgba(255, 255, 255, 0.07);
  --auth-google-border: rgba(255, 255, 255, 0.15);
  --auth-google-color: #fff;
  --auth-google-hover: rgba(255, 255, 255, 0.12);
  --auth-stay: rgba(255, 255, 255, 0.45);
  --auth-stay-timeout: rgba(255, 255, 255, 0.2);
  --auth-pw-bar: rgba(255, 255, 255, 0.1);
  --auth-pw-label: rgba(255, 255, 255, 0.35);
  --auth-confirm-hint: rgba(255, 255, 255, 0.3);
  --auth-toggle-pw: rgba(255, 255, 255, 0.5);
  --studip-bg: linear-gradient(135deg, #020617 0%, #0f172a 45%, #082f49 100%);
  --studip-back-bg: rgba(255, 255, 255, 0.08);
  --studip-back-border: rgba(255, 255, 255, 0.15);
  --studip-back-color: rgba(255, 255, 255, 0.7);
  --studip-subtitle: rgba(255, 255, 255, 0.35);
}
body.night {
  --purple: #60a5fa;
  --pink: #38bdf8;
  --orange: #ff8c5a;
  --bg: #020617;
  --card: #0f172a;
  --text: #e2e8f0;
  --muted: #64748b;
  --shadow: 0 2px 14px rgba(0, 0, 0, 0.4);
  --border: #1e293b;
  --dp-bg: linear-gradient(135deg, #020617 0%, #0f172a 48%, #082f49 100%);
  --dp-solid: #020617;
  --dp-modal: linear-gradient(135deg, #0f172a, #082f49);
  /* adaptive semantic tokens — dark overrides */
  --glass-bg: rgba(255, 255, 255, 0.07);
  --glass-border: rgba(255, 255, 255, 0.14);
  --glass-border-top: rgba(255, 255, 255, 0.22);
  --on-glass: rgba(255, 255, 255, 0.88);
  --on-glass-muted: rgba(255, 255, 255, 0.45);
  --on-glass-faint: rgba(255, 255, 255, 0.3);
  --card-inner: rgba(255, 255, 255, 0.05);
  --card-inner-border: rgba(255, 255, 255, 0.1);
  --row-bg: rgba(255, 255, 255, 0.04);
  --row-border: rgba(255, 255, 255, 0.08);
  --section-label: rgba(255, 255, 255, 0.35);
  --divider: rgba(255, 255, 255, 0.07);
  --badge-bg: rgba(255, 255, 255, 0.08);
  --badge-border: rgba(255, 255, 255, 0.12);
  --badge-color: rgba(255, 255, 255, 0.5);
  --slot-bg: rgba(255, 255, 255, 0.05);
}
body.night .pdf-body {
  background: #1a1a2e;
}
body.night .pdf-page-wrap {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}
body.night .sem-btn {
  background: #1e293b;
  border-color: #334155;
}
body.night .sem-dd {
  background: #0f172a;
  border-color: var(--purple);
}
body.night .sem-opt {
  border-bottom-color: #334155;
}
body.night .sem-opt:hover {
  background: #1e293b;
}
body.night .course-row {
  background: #1e293b;
}
body.night .file-row {
  background: #1f1d2e;
  border-color: #334155;
}
body.night .tt-slot-sb {
  background: #1e293b;
}
body.night .mail-sb {
  background: #1e293b;
}
body.night .mail-sb.unread {
  background: #221d3a;
}
body.night .co-card {
  background: rgba(255, 255, 255, 0.05);
}
body.night .co-file {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
}
body.night .co-nav-btn {
  color: rgba(255, 255, 255, 0.45);
}
body.night .co-nav-btn:hover {
  color: rgba(255, 255, 255, 0.92);
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.14);
}
body.night .ai-msg.bot {
  background: #1e293b;
}
body.night .ai-tip {
  background: #1e293b;
  border-color: #334155;
}
body.night .ai-textarea {
  background: #1e293b;
  border-color: #334155;
  color: var(--text);
}
body.night .ai-textarea:focus {
  border-color: var(--purple);
  background: #334155;
}
body.night .ai-sel-banner {
  background: linear-gradient(135deg, #221d3a, #231d30);
}
body.night .fv-preview-card {
  background: #0f172a;
}
body.night .sb-back:hover {
  background: #1e293b;
}
body.night .sb-x-btn {
  background: #1e293b;
}
body.night .sb-x-btn:hover {
  background: #334155;
}
body.night .pdf-tb-btn {
  background: #1e293b;
  border-color: #334155;
  color: var(--purple);
}
body.night .pdf-tb-btn:hover {
  background: #334155;
}
body.night .tb-toggle {
  background: #1e293b;
}
body.night .tb-toggle:hover {
  background: #334155;
}
body.night .tb-portal-btn {
  background: #1e293b;
  color: var(--purple);
}
body.night .tb-portal-btn:hover {
  background: #334155;
}

#authBox {
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.32);
}

#authSubmit,
.sub-btn-upgrade,
.settings-save-btn,
.profile-save-btn {
  background: var(--brand-gradient) !important;
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.32) !important;
}

#authSubmit:hover,
.sub-btn-upgrade:hover,
.settings-save-btn:hover,
.profile-save-btn:hover {
  box-shadow: 0 14px 34px rgba(37, 99, 235, 0.42) !important;
}

#authBox > div:last-child {
  background: linear-gradient(160deg, #0f172a, #1d4ed8, #0ea5e9) !important;
}

#googleSignIn:hover {
  background: var(--auth-google-hover) !important;
  border-color: rgba(96, 165, 250, 0.35) !important;
}

@media (max-width: 760px) {
  #authModal {
    padding: 16px;
  }
  #authBox {
    width: min(440px, 100%) !important;
    max-height: calc(100vh - 32px) !important;
    flex-direction: column !important;
  }
  #authBox > div:first-child {
    padding: 32px 24px !important;
  }
  #authBox > div:last-child {
    display: none !important;
  }
}
/* ── LIGHT MODE — portal & deep-area overrides ──────────────────────────── */
body:not(.night) .blob {
  opacity: 0.09;
}
body:not(.night) #portal::before {
  opacity: 0.015;
}
body:not(.night) #courseOverview::before {
  opacity: 0.012;
}
body:not(.night) #courseOverview::after {
  background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
}
/* studipDash now uses var(--dp-bg) inline */
body:not(.night) #authBox {
  background: linear-gradient(135deg, #ffffff, #eff6ff) !important;
  border-color: rgba(37, 99, 235, 0.2) !important;
}
body:not(.night) #onboardModal > div {
  background: linear-gradient(135deg, #ffffff, #eff6ff) !important;
  border-color: rgba(37, 99, 235, 0.2) !important;
}
body:not(.night) #authModal {
  background: rgba(37, 99, 235, 0.18);
  backdrop-filter: blur(20px);
}
/* portal header */
body:not(.night) .p-tag {
  color: rgba(30, 64, 175, 0.6);
}
body:not(.night) .p-uni-badge {
  background: rgba(255, 255, 255, 0.6);
  border-color: rgba(37, 99, 235, 0.16);
}
body:not(.night) .p-uni-name {
  color: rgba(30, 58, 138, 0.85);
}
body:not(.night) .p-uni-city {
  color: rgba(30, 64, 175, 0.5);
}
/* portal grid cards */
body:not(.night) .pc {
  background: rgba(255, 255, 255, 0.38);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-bottom-color: rgba(37, 99, 235, 0.18);
  border-right-color: rgba(37, 99, 235, 0.12);
  backdrop-filter: blur(22px) saturate(180%);
  -webkit-backdrop-filter: blur(22px) saturate(180%);
  box-shadow:
    0 4px 24px rgba(37, 99, 235, 0.07),
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    inset 0 -1px 0 rgba(37, 99, 235, 0.04);
}
body:not(.night) .pc::before {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0.05) 60%);
}
body:not(.night) .pc::after {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
}
body:not(.night) .pc:hover {
  background: rgba(255, 255, 255, 0.58);
  border-color: rgba(37, 99, 235, 0.35);
  border-top-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  box-shadow:
    0 20px 60px rgba(37, 99, 235, 0.16),
    0 0 0 1px rgba(37, 99, 235, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 0 rgba(37, 99, 235, 0.06);
}
body:not(.night) .pc-name {
  color: #2d2d2d;
}
body:not(.night) .pc-desc {
  color: rgba(30, 64, 175, 0.55);
}
/* portal nav tabs */
body:not(.night) .p-nav-bar {
  background: rgba(255, 255, 255, 0.55);
  border-color: rgba(37, 99, 235, 0.18);
  border-top-color: rgba(255, 255, 255, 0.95);
  box-shadow:
    0 8px 32px rgba(37, 99, 235, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 0 rgba(37, 99, 235, 0.06);
}
body:not(.night) .p-nav-bar::before {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.6) 0%, rgba(255, 255, 255, 0.1) 100%);
}
body:not(.night) .psb {
  color: rgba(30, 64, 175, 0.52);
}
body:not(.night) .psb::after {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.7), transparent);
}
body:not(.night) .psb:hover {
  color: #2563eb;
  background: rgba(37, 99, 235, 0.09);
  border-color: rgba(37, 99, 235, 0.2);
  box-shadow:
    0 4px 16px rgba(37, 99, 235, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}
body:not(.night) .psb.on {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.18), rgba(14, 165, 233, 0.12));
  color: #2563eb;
  border-color: rgba(37, 99, 235, 0.32);
  border-top-color: rgba(255, 255, 255, 0.9);
  box-shadow:
    0 2px 18px rgba(37, 99, 235, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 0 rgba(37, 99, 235, 0.07);
}
body:not(.night) .psb.on::before {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0.1) 55%);
}
body:not(.night) .psb-div {
  background: rgba(37, 99, 235, 0.15);
}
body:not(.night) .psb.ai-link {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.14), rgba(14, 165, 233, 0.1));
  color: #2563eb;
  border-color: rgba(37, 99, 235, 0.25);
  box-shadow:
    0 2px 10px rgba(37, 99, 235, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}
body:not(.night) .psb.ai-link:hover {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.22), rgba(14, 165, 233, 0.16));
  box-shadow:
    0 4px 18px rgba(37, 99, 235, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
}
/* course overview tabs */
body:not(.night) .co-nav {
  background: rgba(255, 255, 255, 0.55);
  border-color: rgba(37, 99, 235, 0.18);
  border-top-color: rgba(255, 255, 255, 0.95);
  box-shadow:
    0 8px 32px rgba(37, 99, 235, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 0 rgba(37, 99, 235, 0.06);
}
body:not(.night) .co-nav::before {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.6) 0%, rgba(255, 255, 255, 0.1) 100%);
}
body:not(.night) .co-nav-btn {
  color: rgba(30, 64, 175, 0.52);
}
body:not(.night) .co-nav-btn::after {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.7), transparent);
}
body:not(.night) .co-nav-btn:hover {
  color: #2563eb;
  background: rgba(37, 99, 235, 0.09);
  border-color: rgba(37, 99, 235, 0.2);
  box-shadow:
    0 4px 16px rgba(37, 99, 235, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}
body:not(.night) .co-nav-btn.active {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.18), rgba(14, 165, 233, 0.12));
  color: #2563eb;
  border-color: rgba(37, 99, 235, 0.32);
  border-top-color: rgba(255, 255, 255, 0.9);
  box-shadow:
    0 2px 18px rgba(37, 99, 235, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 0 rgba(37, 99, 235, 0.07);
}
body:not(.night) .co-nav-btn.active::before {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0.1) 55%);
}
/* course overview content */
body:not(.night) .co-file:hover {
  box-shadow:
    0 8px 24px rgba(37, 99, 235, 0.14),
    0 0 0 1px rgba(37, 99, 235, 0.15);
}
body:not(.night) .ws-title {
  color: #2d2d2d;
}
body:not(.night) .ws-sub {
  color: rgba(45, 45, 45, 0.75);
}
body:not(.night) .ws-hint {
  background: rgba(37, 99, 235, 0.1);
  color: rgba(30, 58, 138, 0.7);
}
body:not(.night) .co-multi-bar {
  background: linear-gradient(135deg, rgba(248, 244, 255, 0.98), rgba(252, 248, 255, 0.98));
  border-top-color: rgba(37, 99, 235, 0.2);
}
body:not(.night) .co-multi-count {
  color: rgba(30, 64, 175, 0.8);
}
/* lecture notes */
/* lecture notes modal */
body:not(.night) .ln-modal {
  border-color: rgba(37, 99, 235, 0.2);
}
/* multi-summary modal */
/* studip dashboard */
/* extension banner */
body:not(.night) .ext-banner {
  background: rgba(255, 255, 255, 0.5);
  border-color: rgba(37, 99, 235, 0.2);
}
body:not(.night) .ext-banner-text h3 {
  color: #2d2d2d;
}

/* auth modal now uses CSS variables — no overrides needed */
body:not(.night) #authBox {
  box-shadow: 0 20px 60px rgba(37, 99, 235, 0.15);
}

/* Onboarding modal */
body:not(.night) #onboardModal {
  background: rgba(37, 99, 235, 0.22) !important;
  backdrop-filter: blur(20px);
}
body:not(.night) #onboardModal > div {
  background: linear-gradient(160deg, #fff 0%, #eff6ff 100%) !important;
  border: 1px solid rgba(37, 99, 235, 0.2) !important;
  box-shadow: 0 20px 60px rgba(37, 99, 235, 0.15) !important;
}
body:not(.night) #onboardModal [style*='color:rgba(255,255,255'] {
  color: #2d2d2d !important;
}
body:not(.night) #onboardModal [style*='color:#fff'] {
  color: #2d2d2d !important;
}
body:not(.night) #onboardModal input,
body:not(.night) #onboardModal select {
  background: #eff6ff !important;
  border: 1.5px solid rgba(37, 99, 235, 0.25) !important;
  color: #2d2d2d !important;
}
body:not(.night) #onboardModal label {
  color: rgba(30, 64, 175, 0.65) !important;
}
body:not(.night) #onboardModal [style*='background:rgba(255,255,255,.1)'] {
  background: rgba(37, 99, 235, 0.15) !important;
}
body:not(.night) #onboardModal #obErr1,
body:not(.night) #onboardModal #obErr2 {
  background: rgba(255, 107, 55, 0.08) !important;
  color: #c0400a !important;
}

/* Auth indicator badge in portal */
body:not(.night) #authIndicator {
  background: rgba(255, 255, 255, 0.6) !important;
  border: 1px solid rgba(37, 99, 235, 0.2) !important;
  backdrop-filter: blur(12px);
}
body:not(.night) #authName {
  color: rgba(30, 58, 138, 0.75) !important;
}

/* Portal: pc-name / pc-desc are already covered but ensure inline color override */
body:not(.night) .pc-name {
  color: #2d2d2d !important;
}
body:not(.night) .pc-desc {
  color: rgba(30, 64, 175, 0.55) !important;
}

/* Toast styles — moved to features/toast/toast.css */

/* PDF loading text */
body:not(.night) .pdf-loading {
  color: #2d2d2d;
}

/* welcome state text */
.night-btn {
  width: 34px;
  height: 34px;
  border: none;
  border-radius: 9px;
  background: #f3eeff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: background 0.15s;
}
.night-btn:hover {
  background: #ede0ff;
}
body {
  font-family: 'Nunito', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  height: 100vh;
  height: 100dvh;
}
/* Global select dropdown theming — option background/color are the only reliable cross-browser hooks */
select {
  color-scheme: dark;
}
select option {
  background-color: #0f1623;
  color: rgba(255, 255, 255, 0.85);
}
body:not(.night) select {
  color-scheme: light;
}
body:not(.night) select option {
  background-color: #ffffff;
  color: #222;
}
body.landing {
  overflow-y: auto;
  height: auto;
}
body.page-transitioning {
  background: var(--dp-solid);
}
@keyframes drift {
  from {
    transform: translateY(0) scale(1);
  }
  to {
    transform: translateY(28px) scale(1.07);
  }
}
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes dotBounce {
  0%,
  80%,
  100% {
    transform: scale(0.55);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}
@keyframes confettiDrop {
  from {
    transform: translateY(-40px) rotate(0deg);
    opacity: 1;
  }
  to {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}
@keyframes popIn {
  from {
    transform: scale(0.9) translateY(4px);
    opacity: 0;
  }
  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}
@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.4);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(37, 99, 235, 0);
  }
}