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

:root {
  --bg: #fefdfb;
  --bg-alt: #faf8f5;
  --ink: #2d2a26;
  --ink-muted: #5c5752;
  --ink-light: #8a8580;
  --primary: #e07a5f;
  --primary-dark: #c46950;
  --primary-light: #f2a88a;
  --accent: #81b29a;
  --accent-2: #c9ada7;
  --accent-3: #9b8cda;
  --pastel-coral: #fce4dc;
  --pastel-mint: #d8f0e3;
  --pastel-lavender: #e8e0f5;
  --pastel-sky: #dbeafe;
  --border: #efeae6;
  --card-bg: #ffffff;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 8px 28px rgba(0, 0, 0, 0.06);
  --max-width: 1100px;
  --font-head: 'Outfit', system-ui, sans-serif;
  --font-body: 'Nunito', system-ui, sans-serif;
}
[data-theme="dark"] {
  --bg: #171717;
  --bg-alt: #1f1f1f;
  --ink: #f2f2f2;
  --ink-muted: #d0d0d0;
  --ink-light: #a7a7a7;
  --primary: #e89a82;
  --primary-dark: #d58066;
  --primary-light: #f2b49f;
  --accent: #7fb7a0;
  --accent-2: #9d8f8a;
  --accent-3: #afa2ea;
  --pastel-coral: #3a2a26;
  --pastel-mint: #27342f;
  --pastel-lavender: #2d2a3c;
  --pastel-sky: #243141;
  --border: #313131;
  --card-bg: #202020;
  --shadow: 0 2px 14px rgba(0,0,0,0.45);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.5);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); font-family: var(--font-body); line-height: 1.65; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); text-decoration: underline; }
.shell { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }

.site-header { background: color-mix(in srgb, var(--card-bg) 92%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); padding: 0.9rem 0; position: sticky; top: 0; z-index: 100; }
.site-header-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.site-header-start {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}
.site-header-admin-link {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  white-space: nowrap;
}
.site-header-admin-link:hover {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 35%, var(--border));
  text-decoration: none;
}
.site-header-admin-link[hidden] { display: none !important; }
.brand { display: flex; align-items: center; gap: 0.75rem; color: var(--ink); font-weight: 800; font-size: 1.2rem; text-decoration: none; }
.brand:hover { color: var(--primary); text-decoration: none; }
.brand-mark { width: 26px; height: 26px; border-radius: 12px; background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%); }
.main-nav { flex: 1; min-width: 0; }
.main-nav-layout {
  display: flex;
  align-items: center;
  width: 100%;
  gap: 1.25rem;
}
.main-nav-staple,
.main-nav-personal,
.main-nav-auth {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 1.2rem;
}
.main-nav-end {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex-shrink: 0;
}
.main-nav-auth[hidden],
.main-nav-personal li[hidden],
.main-nav-auth li[hidden] { display: none !important; }
.main-nav ul { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 1.2rem; }
.main-nav a { color: var(--ink); font-weight: 600; text-decoration: none; }
.main-nav a:hover { color: var(--primary); }
.main-nav .nav-cta { background: var(--primary); color: #fff; padding: 0.45rem 0.9rem; border-radius: var(--radius); }
.main-nav .nav-cta:hover { color: #fff; background: var(--primary-dark); }
.main-nav .js-nav-admin { display: none; }

/* Header: mobile menu */
.site-header-end {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex: 1;
  min-width: 0;
  justify-content: flex-end;
}
.site-header-controls {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  color: var(--ink);
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle:hover { background: var(--bg-alt); }
.nav-toggle:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.nav-toggle-icon {
  position: relative;
  width: 1.15rem;
  height: 0.85rem;
  display: block;
}
.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.22s ease, top 0.22s ease, opacity 0.18s ease;
}
.nav-toggle-bar { top: 50%; margin-top: -1px; }
.nav-toggle-bar::before { content: ''; top: -6px; }
.nav-toggle-bar::after { content: ''; top: 6px; }
.site-header.is-nav-open .nav-toggle-bar { background: transparent; }
.site-header.is-nav-open .nav-toggle-bar::before { top: 0; transform: rotate(45deg); }
.site-header.is-nav-open .nav-toggle-bar::after { top: 0; transform: rotate(-45deg); }
.site-nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 98;
  border: 0;
  padding: 0;
  margin: 0;
  background: rgba(23, 23, 23, 0.45);
  cursor: pointer;
}
body.nav-open { overflow: hidden; }

@media (max-width: 768px) {
  .site-header-inner {
    position: relative;
    flex-wrap: nowrap;
    align-items: center;
  }
  .site-header-end {
    margin-left: auto;
    gap: 0.45rem;
  }
  .brand {
    flex: 1;
    min-width: 0;
    font-size: 1.05rem;
  }
  .brand span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .nav-toggle { display: inline-flex; }
  .site-nav-backdrop { display: block; }
  .site-header:not(.is-nav-open) .site-nav-backdrop {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }
  .site-header.is-nav-open .site-nav-backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .main-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 99;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-hover);
    max-height: min(70vh, calc(100dvh - 4.5rem));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.35rem);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.22s ease, visibility 0.2s;
  }
  .site-header.is-nav-open .main-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }
  .main-nav-layout {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .main-nav-end {
    margin-left: 0;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0;
  }
  .main-nav-staple,
  .main-nav-personal,
  .main-nav-auth {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }
  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    width: 100%;
  }
  .main-nav li {
    border-bottom: 1px solid var(--border);
  }
  .main-nav li:last-child { border-bottom: 0; }
  .main-nav a {
    display: block;
    padding: 0.85rem 1.25rem;
    font-size: 1rem;
  }
  .main-nav a:hover { background: var(--bg-alt); text-decoration: none; }
  .main-nav .nav-cta {
    margin: 0.35rem 1rem 0.5rem;
    text-align: center;
    display: block;
  }
  .main-nav #authNav span {
    display: flex;
    flex-direction: column;
    gap: 0;
    width: 100%;
  }
  .main-nav #authNav a {
    margin: 0;
  }
  .main-nav .nav-user {
    display: block;
    padding: 0.75rem 1.25rem 0.25rem;
    font-weight: 700;
    color: var(--ink-muted);
    font-size: 0.92rem;
  }
  .site-header-controls .theme-toggle-btn {
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    border-radius: var(--radius);
    justify-content: center;
  }
  .site-header-controls .theme-toggle-btn .theme-toggle-label {
    display: none;
  }
  .site-header-controls .theme-toggle-icon {
    font-size: 1.05rem;
  }
  .site-header-admin-link {
    display: none !important;
  }
  .main-nav .js-nav-admin {
    display: block;
  }
}

.theme-toggle-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--ink-muted);
  border-radius: 999px;
  padding: 0.3rem 0.65rem;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.theme-toggle-btn:hover { background: var(--bg-alt); color: var(--ink); }
.theme-toggle-icon { line-height: 1; font-size: 0.95rem; }

.hero {
  padding: 4rem 1.5rem 5rem;
  text-align: center;
  background: linear-gradient(165deg, #fef7f4 0%, #fdf6f2 25%, #fef9f6 50%, #faf8f5 100%);
}
.hero .shell {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.4rem 2rem;
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255,255,255,0.9);
  box-shadow: 0 4px 24px rgba(224,122,95,0.08), 0 12px 48px rgba(0,0,0,0.04);
}
.hero-title { font-family: var(--font-head); font-size: clamp(2rem, 5vw, 2.85rem); font-weight: 700; margin: 0 0 0.7rem; line-height: 1.2; }
.hero-title::after { content: ''; display: block; width: 56px; height: 4px; margin: 1rem auto 0; border-radius: 2px; background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%); }
.hero-sub { font-size: 1.1rem; color: var(--ink-muted); max-width: 40ch; margin: 0 auto; font-weight: 600; }

.courses-strip { background: linear-gradient(90deg, #81b29a 0%, #7dd3fc 50%, #9b8cda 100%); color: #fff; padding: 1.4rem 0; }
.courses-strip .shell { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 0.9rem 1.6rem; }
.courses-strip p { margin: 0; font-weight: 700; font-size: 0.95rem; }
.course-links { display: flex; flex-wrap: wrap; gap: 0.7rem 1rem; }
.course-links a { color: #fff; font-weight: 700; padding: 0.35rem 0.85rem; border-radius: var(--radius); background: rgba(255,255,255,0.2); border: 1px solid rgba(255,255,255,0.45); text-decoration: none; }
.course-links a.available { background: #fff; color: var(--primary); border-color: #fff; }

.section { padding: 4rem 0; }
.section-title { font-family: var(--font-head); font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; margin: 0 0 0.5rem; }
.section-sub { font-size: 1.05rem; color: var(--ink-muted); margin: 0 0 2rem; max-width: 42ch; font-weight: 500; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }
.card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.75rem; box-shadow: var(--shadow); transition: box-shadow .25s, transform .25s; }
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.card-icon { width: 52px; height: 52px; border-radius: var(--radius); display: flex; align-items: center; justify-content: center; font-size: 1.35rem; margin-bottom: 1rem; font-weight: 700; }
.card:nth-child(1) .card-icon { background: var(--pastel-coral); color: var(--primary); }
.card:nth-child(2) .card-icon { background: var(--pastel-mint); color: var(--accent); }
.card:nth-child(3) .card-icon { background: var(--pastel-lavender); color: var(--accent-3); }
.card:nth-child(4) .card-icon { background: var(--pastel-sky); color: #0ea5e9; }
.card-title { font-weight: 800; font-size: 1.1rem; margin: 0 0 0.35rem; }
.card-desc { font-size: 0.95rem; color: var(--ink-muted); margin: 0; line-height: 1.55; }
.card.highlight { border-color: var(--primary-light); background: linear-gradient(180deg, var(--pastel-coral) 0%, var(--card-bg) 40%); }

.cta-block { text-align: center; padding: 3rem 1.5rem; background: linear-gradient(180deg, var(--pastel-mint) 0%, var(--bg-alt) 100%); border-radius: var(--radius-xl); border: 1px solid rgba(129,178,154,0.2); }
.btn { display: inline-block; border: none; background: var(--primary); color: #fff; border-radius: var(--radius); padding: 0.8rem 1.5rem; font-weight: 700; cursor: pointer; box-shadow: 0 4px 16px rgba(224,122,95,0.35); }
.btn:hover { background: var(--primary-dark); color: #fff; text-decoration: none; transform: translateY(-2px); }
.btn-secondary { background: transparent; color: var(--primary); border: 2px solid var(--primary); box-shadow: none; }

.site-footer { background: linear-gradient(180deg, #3d3a36 0%, #2d2a26 100%); color: #f5f3f0; padding: 2.25rem 0; margin-top: 3rem; }
.site-footer a { color: rgba(255,255,255,0.92); }
.site-footer a:hover { color: var(--primary-light); }
.site-footer-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }
.footer-brand { font-weight: 800; font-size: 1.1rem; }
.footer-links { list-style: none; display: flex; gap: 1rem; margin: 0; padding: 0; flex-wrap: wrap; }
.footer-disclaimer { width: 100%; font-size: 0.84rem; color: rgba(255,255,255,0.75); margin: 0.4rem 0 0; }
.footer-acknowledgment { width: 100%; font-size: 0.88rem; color: rgba(255,255,255,0.88); margin: 0.75rem 0 0; line-height: 1.5; }
.footer-account-row { width: 100%; margin-top: 0.6rem; }
.footer-logout-btn { border: 1px solid rgba(255,255,255,0.5); background: transparent; color: #fff; border-radius: 8px; padding: 0.4rem 0.75rem; cursor: pointer; }

.feature-list { list-style: none; margin: 0; padding: 0; }
.feature-list li { padding: 0.5rem 0 0.5rem 1.5rem; position: relative; color: var(--ink-muted); }
.feature-list li::before { content: ''; position: absolute; left: 0; top: 0.95rem; width: 8px; height: 8px; background: var(--primary); border-radius: 50%; }

.auth-page { max-width: 420px; margin: 2.5rem auto; padding: 0 1rem; }
.form-row { margin-bottom: 0.85rem; }
.form-row label { display: block; margin-bottom: 0.35rem; font-weight: 600; }
.form-row input, .form-row select, .form-row textarea { width: 100%; border: 1px solid var(--border); border-radius: 10px; padding: 0.6rem 0.7rem; font: inherit; }
.error { color: #c53030; font-size: 0.9rem; min-height: 1.1rem; }
.ok { color: #2f855a; font-size: 0.9rem; min-height: 1.1rem; }
.password-wrap { position: relative; }
.password-wrap input { padding-right: 2.4rem; }
.password-toggle { position: absolute; right: 0.45rem; top: 50%; transform: translateY(-50%); border: 0; background: transparent; cursor: pointer; }