/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Quicksand', 'Segoe UI', sans-serif;
  background: #fff5f5;
  color: #1e293b;
  line-height: 1.7;
  font-weight: 500;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ===== COLOR TOKENS ===== */
:root {
  --maroon-50: #fff5f5;
  --maroon-100: #fef3f2;
  --maroon-200: #fecaca;
  --maroon-300: #f98c8c;
  --maroon-400: #f43f5e;
  --maroon-500: #e11d48;
  --maroon-600: #c22d4c;
  --maroon-700: #9f1239;
  --maroon-800: #881337;
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 12px rgba(225,29,72,.08);
  --shadow-lg: 0 4px 24px rgba(225,29,72,.15);
}

/* ===== NAVBAR ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--maroon-100);
  box-shadow: 0 1px 8px rgba(225,29,72,.06);
}
.navbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--maroon-700);
}
.brand-icon { font-size: 1.5rem; }
.navbar-right { display: flex; align-items: center; gap: 12px; }
.nav-link {
  padding: 8px 18px;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--maroon-600);
  border: 1.5px solid var(--maroon-200);
  transition: all .2s;
}
.nav-link:hover {
  background: var(--maroon-500);
  color: var(--white);
  border-color: var(--maroon-500);
}
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--maroon-600);
  cursor: pointer;
  padding: 6px;
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, var(--maroon-500) 0%, var(--maroon-400) 50%, var(--maroon-300) 100%);
  padding: 60px 20px 50px;
  text-align: center;
  color: var(--white);
}
.hero-content { max-width: 700px; margin: 0 auto; }
.hero-subtitle {
  font-size: .9rem;
  font-weight: 600;
  opacity: .85;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
}
.hero-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.3;
}
.hero-desc {
  font-size: 1.05rem;
  opacity: .9;
  font-weight: 500;
}

/* ===== MAIN CONTAINER ===== */
.main-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 30px 20px 60px;
}

/* ===== COURSE TABS ===== */
.course-tabs-wrapper {
  margin-bottom: 30px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.course-tabs {
  display: flex;
  gap: 12px;
  padding-bottom: 4px;
}
.course-tab {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 22px;
  background: var(--white);
  border: 2px solid var(--maroon-100);
  border-radius: var(--radius);
  transition: all .25s;
  min-width: 180px;
  box-shadow: var(--shadow);
}
.course-tab:hover {
  border-color: var(--maroon-300);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.course-tab.active {
  border-color: var(--maroon-500);
  background: linear-gradient(135deg, var(--maroon-50), var(--white));
  box-shadow: var(--shadow-lg);
}
.tab-name {
  font-weight: 700;
  font-size: .95rem;
  color: var(--gray-800);
}
.course-tab.active .tab-name { color: var(--maroon-700); }
.tab-desc {
  font-size: .78rem;
  color: var(--gray-500);
  line-height: 1.4;
}

/* ===== SECTION TITLES ===== */
.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 18px;
}
.section-title .highlight { color: var(--maroon-600); }

/* ===== MEETINGS GRID ===== */
.meetings-section { margin-bottom: 40px; }
.meetings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
}
.meeting-card {
  background: var(--white);
  border: 2px solid var(--maroon-100);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
  transition: all .25s;
  box-shadow: var(--shadow);
  cursor: pointer;
}
.meeting-card:hover {
  border-color: var(--maroon-300);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.meeting-card.active {
  border-color: var(--maroon-500);
  background: var(--maroon-50);
}
.meeting-number {
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--maroon-500);
  margin-bottom: 6px;
}
.meeting-title {
  font-size: .85rem;
  font-weight: 600;
  color: var(--gray-700);
  line-height: 1.4;
}

/* ===== CONTENT SECTION ===== */
.content-section { display: flex; flex-direction: column; gap: 20px; }

/* Header Card */
.content-header-card {
  background: linear-gradient(135deg, var(--maroon-500), var(--maroon-400));
  color: var(--white);
  padding: 30px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.content-header-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 8px 0 14px;
}
.badge {
  display: inline-block;
  background: rgba(255,255,255,.2);
  padding: 4px 14px;
  border-radius: 50px;
  font-size: .78rem;
  font-weight: 600;
}
.meta-row { display: flex; flex-wrap: wrap; gap: 8px; }
.meta-pill {
  background: rgba(255,255,255,.18);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: .75rem;
  font-weight: 600;
}

/* Content Cards */
.content-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--maroon-100);
}
.content-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--maroon-700);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--maroon-100);
}

/* Rich Content */
.rich-content { font-size: .95rem; color: var(--gray-700); line-height: 1.8; }
.rich-content p { margin-bottom: 12px; }
.rich-content h1, .rich-content h2, .rich-content h3 { color: var(--gray-800); margin: 18px 0 10px; }
.rich-content ul, .rich-content ol { padding-left: 24px; margin-bottom: 12px; }
.rich-content li { margin-bottom: 6px; }
.rich-content img { border-radius: var(--radius-sm); margin: 12px 0; }
.rich-content code {
  background: var(--maroon-50);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: .88rem;
}
.rich-content pre {
  background: var(--gray-800);
  color: var(--maroon-200);
  padding: 16px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 12px 0;
}

/* Topics Grid */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-top: 8px;
}
.topic-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  background: var(--maroon-50);
  border-radius: var(--radius-sm);
  border: 1px solid var(--maroon-100);
}
.topic-number {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--maroon-500);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .9rem;
}
.topic-text {
  font-size: .9rem;
  color: var(--gray-700);
  line-height: 1.5;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--gray-400);
  font-size: 1rem;
  background: var(--white);
  border-radius: var(--radius);
  border: 2px dashed var(--maroon-200);
}

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  padding: 24px 20px;
  color: var(--gray-400);
  font-size: .85rem;
  font-weight: 600;
  border-top: 1px solid var(--maroon-100);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .menu-toggle { display: block; }
  .nav-link { display: none; }
  body.sidebar-open .nav-link { display: block; }

  .hero { padding: 40px 16px 35px; }
  .hero-title { font-size: 1.6rem; }

  .course-tabs { flex-direction: column; }
  .course-tab { min-width: unset; }

  .meetings-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }

  .content-header-card { padding: 22px; }
  .content-header-card h2 { font-size: 1.2rem; }
  .content-card { padding: 20px; }
  .topics-grid { grid-template-columns: 1fr; }
}

/* ===== MOBILE SIDEBAR (menu toggle) ===== */
@media (max-width: 768px) {
  .mobile-nav {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(0,0,0,.4);
  }
  .mobile-nav.open { display: block; }
  .mobile-nav-inner {
    position: absolute;
    top: 0;
    right: 0;
    width: 280px;
    height: 100%;
    background: var(--white);
    padding: 24px;
    overflow-y: auto;
    box-shadow: -4px 0 20px rgba(0,0,0,.1);
  }
}

/* ===== ADMIN-RELATED (keep compatibility) ===== */
.app-shell { min-height: 100vh; }
.topbar { display: none; }
.layout { display: block; }
.sidebar { display: none; }
.content { max-width: 100%; }