@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap");

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

:root {
  --ubi-blue: #003087;
  --ubi-dark: #001a4d;
  --ubi-gold: #c9a84c;
  --ubi-gold-lt: #e8c96a;
  --bg: #0f1623;
  --bg-surface: #171f2e;
  --bg-card: #1e2a3d;
  --bg-code: #111827;
  --border: #2a3a55;
  --text: #e2e8f0;
  --text-muted: #8899aa;
  --text-dim: #556070;
  --accent: #4a9eff;
  --accent-glow: rgba(74, 158, 255, 0.15);
  --success: #22c55e;
  --aside-w: 280px;
  --header-h: 80px;
  --footer-h: 56px;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --trans: 0.2s ease;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}
body {
  font-family: "Inter", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ── Scrollbar ─────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--ubi-gold);
}

/* ── Header ────────────────────────────────────────────── */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: linear-gradient(135deg, var(--ubi-dark) 0%, var(--ubi-blue) 100%);
  border-bottom: 2px solid var(--ubi-gold);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 20px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

#site-header .logo-wrap {
  width: 175px;
  height: 75px;
  flex-shrink: 0;
  background: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3px;
  box-shadow: 0 0 12px rgba(201, 168, 76, 0.4);
}
#site-header .logo-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
#site-header .logo-wrap .logo-fallback {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--ubi-blue);
  line-height: 1;
}

#site-header .header-text {
  flex-shrink: 0;
}
#site-header .header-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.4px;
  line-height: 1.2;
}
#site-header .header-text .header-sub {
  font-size: 0.7rem;
  color: var(--ubi-gold-lt);
  font-weight: 400;
  letter-spacing: 0.2px;
}

/* ── Header Nav ─────────────────────────────────────────── */
#main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--trans);
  border: 1px solid transparent;
  letter-spacing: 0.2px;
}
.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}
.nav-link.active {
  color: var(--ubi-gold);
  background: rgba(201, 168, 76, 0.12);
  border-color: rgba(201, 168, 76, 0.35);
  font-weight: 600;
}

#menu-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  color: #fff;
  font-size: 1.4rem;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: background var(--trans);
}
#menu-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* aside.hidden = collapsed (when on Home) */
#layout {
  display: flex;
  margin-top: var(--header-h);
  min-height: calc(100vh - var(--header-h) - var(--footer-h));
}

/* ── Aside ─────────────────────────────────────────────── */
#aside {
  width: var(--aside-w);
  flex-shrink: 0;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h) - var(--footer-h));
  transition:
    width var(--trans),
    opacity var(--trans);
  opacity: 1;
}
#aside.hidden {
  width: 0;
  overflow: hidden;
  border: none;
  opacity: 0;
  pointer-events: none;
}

.nav-section {
  border-bottom: 1px solid var(--border);
}

.nav-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  cursor: pointer;
  color: var(--ubi-gold);
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  transition: background var(--trans);
  user-select: none;
}
.nav-section-header:hover {
  background: var(--accent-glow);
}

.nav-section-header .chevron {
  font-size: 0.7rem;
  transition: transform var(--trans);
}
.nav-section.open .chevron {
  transform: rotate(90deg);
}

.nav-items {
  display: none;
}
.nav-section.open .nav-items {
  display: block;
}

.nav-item {
  display: block;
  padding: 9px 16px 9px 28px;
  color: var(--text-muted);
  font-size: 0.88rem;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all var(--trans);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-decoration: none;
}
.nav-item:hover {
  background: var(--accent-glow);
  color: var(--text);
}
.nav-item.active {
  background: var(--accent-glow);
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 500;
}
.nav-item .item-icon {
  margin-right: 8px;
  font-size: 0.85rem;
}

/* ── Main ──────────────────────────────────────────────── */
#main-content {
  flex: 1;
  overflow-y: auto;
  padding: 28px;
  min-width: 0;
}

/* Welcome screen */
.welcome-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  gap: 16px;
}
.welcome-screen .big-icon {
  font-size: 4rem;
}
.welcome-screen h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
}
.welcome-screen p {
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.7;
}

/* Home quick-access cards */
.home-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  width: 100%;
  max-width: 700px;
  margin-top: 8px;
}
.home-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--trans);
}
.home-card:hover {
  border-color: var(--ubi-gold);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}
.home-card-icon {
  font-size: 2rem;
  margin-bottom: 10px;
}
.home-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.home-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* How to navigate guide */
.home-guide {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--ubi-gold);
  border-radius: var(--radius);
  padding: 20px 24px;
  max-width: 560px;
  width: 100%;
  text-align: left;
}
.home-guide h3 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ubi-gold);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.home-guide ol {
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.home-guide li {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.home-guide strong {
  color: var(--text);
}

/* Section title */
.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ubi-gold);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ── PDF iframe ────────────────────────────────────────── */
.pdf-block {
  margin-bottom: 28px;
}
.pdf-block h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.pdf-frame {
  width: 100%;
  height: 580px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}

/* ── Code Viewer ───────────────────────────────────────── */
.code-block {
  margin-bottom: 28px;
}
.code-block h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tabs-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 0;
  background: var(--bg-code);
  padding: 8px 8px 0;
  border-radius: var(--radius) var(--radius) 0 0;
  border: 1px solid var(--border);
  border-bottom: none;
}
.tab-btn {
  padding: 6px 14px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  border: 1px solid transparent;
  background: none;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-family: "Inter", monospace;
  cursor: pointer;
  transition: all var(--trans);
}
.tab-btn:hover {
  background: var(--bg-card);
  color: var(--text);
}
.tab-btn.active {
  background: var(--bg-card);
  color: var(--accent);
  border-color: var(--border);
  border-bottom-color: var(--bg-card);
  font-weight: 600;
}

.code-panel {
  display: none;
  position: relative;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 0 0 var(--radius) var(--radius);
  max-height: 450px;
  overflow: auto;
}
.code-panel.active {
  display: block;
}

.code-panel pre {
  padding: 20px;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.82rem;
  line-height: 1.6;
  color: #cdd6f4;
  white-space: pre;
  tab-size: 2;
}

/* Syntax highlight classes */
.tok-tag {
  color: #89b4fa;
}
.tok-attr {
  color: #a6e3a1;
}
.tok-val {
  color: #f38ba8;
}
.tok-cmt {
  color: #6c7086;
  font-style: italic;
}
.tok-kw {
  color: #cba6f7;
}
.tok-prop {
  color: #89dceb;
}
.tok-str {
  color: #a6e3a1;
}
.tok-num {
  color: #fab387;
}
.tok-fn {
  color: #89b4fa;
}

.copy-code-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--trans);
}
.copy-code-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* Loading spinner inside code */
.loading-code {
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
  font-style: italic;
}

/* ── Result Button ─────────────────────────────────────── */
.result-block {
  margin-bottom: 28px;
}
.result-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.btn-result {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 28px;
  background: linear-gradient(135deg, var(--ubi-blue), #1a56db);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--trans);
  box-shadow: 0 4px 16px rgba(0, 48, 135, 0.4);
  text-decoration: none;
}
.btn-result:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 48, 135, 0.5);
  background: linear-gradient(135deg, #0040aa, #2563eb);
}
.btn-result:active {
  transform: translateY(0);
}

/* ── Prompts Chat View ─────────────────────────────────── */
.chat-view {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.chat-bubble {
  display: flex;
  gap: 12px;
  max-width: 90%;
}
.chat-bubble.user-bubble {
  flex-direction: row;
}
.chat-bubble.ai-bubble {
  flex-direction: row-reverse;
  align-self: flex-end;
}

.bubble-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
}
.user-bubble .bubble-avatar {
  background: var(--ubi-blue);
  color: #fff;
}
.ai-bubble .bubble-avatar {
  background: var(--ubi-gold);
  color: #000;
}

.bubble-content {
  flex: 1;
}

.bubble-label {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}
.ai-bubble .bubble-label {
  text-align: right;
}

.bubble-body {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
}
.user-bubble .bubble-body {
  border-left: 3px solid var(--accent);
}
.ai-bubble .bubble-body {
  border-right: 3px solid var(--ubi-gold);
}

.bubble-actions {
  margin-top: 8px;
}
.btn-copy-prompt {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--trans);
}
.btn-copy-prompt:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.prompt-placeholder {
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* ── Footer ────────────────────────────────────────────── */
#site-footer {
  flex-shrink: 0;
  background: var(--ubi-dark);
  border-top: 1px solid var(--border);
  padding: 18px 24px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  gap: 20px;
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* Columns */
.footer-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-label {
  color: var(--ubi-gold);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Left: Students */
.footer-students {
  justify-self: start;
}
.student-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.student-list li {
  color: var(--text-muted);
  font-size: 0.78rem;
}

/* Center: Branding */
.footer-center {
  text-align: center;
  align-items: center;
  justify-self: center;
}
.footer-brand {
  color: var(--text-dim);
  font-size: 0.75rem;
}
.footer-github-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--text-dim);
  text-decoration: none;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 0.72rem;
  transition: all var(--trans);
}
.footer-github-link:hover:not([aria-disabled="true"]) {
  color: var(--accent);
  border-color: var(--accent);
}
.footer-github-link[aria-disabled="true"] {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* Right: Nav shortcuts */
.footer-nav {
  justify-self: end;
  align-items: flex-end;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: flex-end;
}
.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.72rem;
  transition: all var(--trans);
  white-space: nowrap;
}
.footer-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
}

/* Floating aside arrow toggle (mobile only) */
#aside-arrow-toggle {
  display: none;
  position: fixed;
  left: 0;
  top: calc(var(--header-h) + 12px);
  z-index: 85;
  width: 28px;
  height: 48px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-left: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--ubi-gold);
  font-size: 0.9rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, background 0.2s ease;
}
#aside-arrow-toggle[hidden] {
  display: none !important;
}
#aside-arrow-toggle:hover {
  background: var(--bg-card);
}
#aside-arrow-toggle.aside-open {
  transform: translateX(min(var(--aside-w), 85vw)) rotate(180deg);
}

/* ── Responsive ────────────────────────────────────────── */

/* ── Tablet landscape (≤ 1024px) ─────────────────────── */
@media (max-width: 1024px) {
  :root {
    --aside-w: 240px;
  }

  #site-header {
    padding: 0 14px;
    gap: 10px;
  }
  #site-header .logo-wrap {
    width: 140px;
    height: 60px;
  }
  #site-header .header-text h1 {
    font-size: 1.05rem;
  }

  .nav-link {
    padding: 6px 10px;
    font-size: 0.8rem;
  }

  #main-content {
    padding: 22px;
  }
  .pdf-frame {
    height: 480px;
  }
}

/* ── Tablet portrait / Small screens (≤ 768px) ──────── */
@media (max-width: 768px) {
  :root {
    --header-h: 64px;
    --aside-w: 260px;
  }

  /* Header */
  #site-header {
    padding: 0 12px;
    gap: 8px;
  }
  #site-header .logo-wrap {
    width: 110px;
    height: 50px;
    padding: 2px;
  }
  #site-header .header-text h1 {
    font-size: 0.95rem;
  }
  #site-header .header-text .header-sub {
    font-size: 0.62rem;
  }

  /* Hamburger menu */
  #menu-toggle {
    display: flex;
  }
  #main-nav {
    display: none;
  }
  #main-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--ubi-dark);
    padding: 12px;
    border-bottom: 1px solid var(--border);
    z-index: 90;
    gap: 4px;
  }
  #aside-arrow-toggle {
    display: flex;
  }

  /* Aside as overlay */
  #aside {
    position: fixed;
    left: 0;
    top: var(--header-h);
    bottom: 0;
    z-index: 80;
    width: min(var(--aside-w), 85vw) !important;
    height: auto;
    opacity: 1 !important;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  #aside.open {
    transform: translateX(0);
    box-shadow: var(--shadow);
  }
  #aside.hidden {
    transform: translateX(-100%);
  }

  /* Main content */
  #main-content {
    padding: 16px;
  }

  /* Home cards */
  .home-cards {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .home-card {
    padding: 18px 14px;
  }
  .home-card-icon {
    font-size: 1.6rem;
  }
  .home-card h3 {
    font-size: 0.9rem;
  }
  .home-card p {
    font-size: 0.78rem;
  }

  /* PDF / iframes */
  .pdf-frame {
    height: 400px;
  }

  /* Code tabs - horizontal scroll */
  .tabs-bar {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
  .tab-btn {
    flex-shrink: 0;
    font-size: 0.78rem;
    padding: 5px 11px;
  }
  .code-panel pre {
    font-size: 0.78rem;
    padding: 14px;
  }

  /* Result buttons */
  .result-buttons {
    flex-direction: column;
  }
  .btn-result {
    font-size: 0.9rem;
    padding: 11px 22px;
    justify-content: center;
  }

  /* Chat bubbles */
  .chat-bubble {
    max-width: 100%;
  }

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

  /* Footer */
  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 14px;
  }
  .footer-students,
  .footer-nav {
    justify-self: center;
    align-items: center;
  }
  .footer-links {
    justify-content: center;
  }
}

/* ── Mobile (≤ 480px) ────────────────────────────────── */
@media (max-width: 480px) {
  :root {
    --header-h: 56px;
  }

  /* Header compact */
  #site-header {
    padding: 0 8px;
    gap: 6px;
  }
  #site-header .logo-wrap {
    width: 80px;
    height: 40px;
  }
  #site-header .header-text h1 {
    font-size: 0.82rem;
    line-height: 1.15;
  }
  #site-header .header-text .header-sub {
    font-size: 0.55rem;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  #menu-toggle {
    font-size: 1.2rem;
    padding: 4px;
  }

  /* Main content tighter */
  #main-content {
    padding: 12px;
  }

  /* Welcome */
  .welcome-screen {
    min-height: 50vh;
    gap: 12px;
  }
  .welcome-screen .big-icon {
    font-size: 2.8rem;
  }
  .welcome-screen h2 {
    font-size: 1.2rem;
  }
  .welcome-screen p {
    font-size: 0.85rem;
  }

  /* Home cards → single column */
  .home-cards {
    grid-template-columns: 1fr;
  }
  .home-card {
    padding: 16px 12px;
  }
  .home-guide {
    padding: 14px 16px;
  }
  .home-guide h3 {
    font-size: 0.8rem;
  }
  .home-guide li {
    font-size: 0.82rem;
  }

  /* PDF iframe shorter */
  .pdf-frame {
    height: 320px;
  }

  /* Section title */
  .section-title {
    font-size: 0.95rem;
    gap: 6px;
    margin-bottom: 14px;
  }

  /* Code viewer */
  .code-panel {
    max-height: 350px;
  }
  .code-panel pre {
    font-size: 0.72rem;
    padding: 10px;
    line-height: 1.5;
  }
  .copy-code-btn {
    font-size: 0.68rem;
    padding: 3px 7px;
  }

  /* Result buttons full-width */
  .btn-result {
    font-size: 0.85rem;
    padding: 10px 16px;
    width: 100%;
    justify-content: center;
    box-sizing: border-box;
  }

  /* Chat / Prompts */
  .bubble-body {
    padding: 10px 12px;
    font-size: 0.8rem;
  }
  .bubble-avatar {
    width: 30px;
    height: 30px;
    font-size: 0.9rem;
  }

  /* Footer */
  #site-footer {
    padding: 12px;
  }
  .footer-inner {
    font-size: 0.7rem;
    gap: 10px;
  }
  .footer-link {
    font-size: 0.65rem;
    padding: 3px 8px;
  }
  .student-list li {
    font-size: 0.7rem;
  }
}