@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --bg: #0f0f1a;
  --bg-card: #1a1a2e;
  --bg-card-hover: #222240;
  --bg-code: #12121e;
  --border: #2a2a4a;
  --text: #e0e0f0;
  --text-dim: #8888aa;
  --text-bright: #ffffff;
  --accent: #7c3aed;
  --accent-light: #a78bfa;
  --accent2: #06b6d4;
  --accent3: #f59e0b;
  --green: #10b981;
  --pink: #ec4899;
  --orange: #f97316;
  --radius: 12px;
  --radius-sm: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
}

/* ─── Navigation ─── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 15, 26, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent-light);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand span { color: var(--accent3); }

.nav-links { display: flex; gap: 0.25rem; align-items: center; }

.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--text-bright); background: rgba(124, 58, 237, 0.15); }

/* ─── Hero ─── */
.hero {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124,58,237,0.12) 0%, transparent 70%);
  top: -200px;
  right: -200px;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(6,182,212,0.08) 0%, transparent 70%);
  bottom: -200px;
  left: -200px;
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  color: var(--text-bright);
  line-height: 1.1;
  margin-bottom: 1rem;
  position: relative;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent-light), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-dim);
  max-width: 640px;
  margin-bottom: 2rem;
  position: relative;
}

.hero .caml-logo {
  font-size: 4rem;
  margin-bottom: 1rem;
  position: relative;
}

/* ─── Joke Banner ─── */
.joke-banner {
  background: linear-gradient(135deg, rgba(245,158,11,0.1), rgba(236,72,153,0.1));
  border: 1px solid rgba(245,158,11,0.2);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 2rem auto;
  max-width: 720px;
  text-align: center;
  position: relative;
}

.joke-banner .joke-icon { font-size: 1.5rem; margin-bottom: 0.25rem; }
.joke-banner p { font-style: italic; color: var(--accent3); font-size: 0.95rem; }
.joke-banner .joke-author { font-size: 0.8rem; color: var(--text-dim); margin-top: 0.5rem; }

/* ─── Container ─── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem;
}

/* ─── Course Grid ─── */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 3rem 0;
}

.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: all 0.3s;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: block;
}

.course-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 40px rgba(124,58,237,0.15);
}

.course-card .card-num {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-light);
  margin-bottom: 0.5rem;
}

.course-card .card-icon { font-size: 2rem; margin-bottom: 0.75rem; }

.course-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 0.5rem;
}

.course-card p {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.6;
}

.course-card .card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1rem;
}

.course-card .card-tags span {
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(124, 58, 237, 0.12);
  color: var(--accent-light);
  font-weight: 500;
}

/* ─── Page Header ─── */
.page-header {
  padding: 6rem 2rem 3rem;
  text-align: center;
}

.page-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--text-bright);
  margin-bottom: 0.5rem;
}

.page-header .subtitle {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 600px;
  margin: 0 auto;
}

.page-header .blurb {
  max-width: 600px;
  margin: 1.5rem auto 0;
  padding: 1rem 1.5rem;
  background: rgba(245,158,11,0.08);
  border-left: 3px solid var(--accent3);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--accent3);
  font-size: 0.95rem;
}

/* ─── Content ─── */
.content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 2rem 4rem;
}

.content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-bright);
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent-light);
  margin: 1.75rem 0 0.75rem;
}

.content p {
  margin-bottom: 1rem;
  color: var(--text);
}

.content ul, .content ol {
  margin: 0.5rem 0 1rem 1.5rem;
  color: var(--text);
}

.content li { margin-bottom: 0.3rem; }

.content strong { color: var(--text-bright); font-weight: 600; }

.content a { color: var(--accent-light); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.content a:hover { border-bottom-color: var(--accent-light); }

/* ─── Code blocks ─── */
.content pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  overflow-x: auto;
  margin: 1rem 0;
  position: relative;
}

.content pre code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  color: #e0e0f0;
  tab-size: 2;
}

.content :not(pre) > code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
  background: rgba(124,58,237,0.12);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--accent-light);
}

/* Syntax highlighting (simple) */
.kw { color: #c678dd; }
.ty { color: #e5c07b; }
.str { color: #98c379; }
.cm { color: #5c6370; font-style: italic; }
.fn { color: #61afef; }
.op { color: #abb2bf; }
.dg { color: #d19a66; }
.va { color: #e06c75; }

/* ─── Joke / Callout boxes ─── */
.joke-box {
  background: rgba(245,158,11,0.06);
  border-left: 3px solid var(--accent3);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
}

.joke-box p { margin: 0; font-style: italic; color: var(--accent3); font-size: 0.92rem; }
.joke-box .attribution { font-size: 0.78rem; color: var(--text-dim); margin-top: 0.5rem; font-style: normal; }

.info-box {
  background: rgba(6,182,212,0.06);
  border-left: 3px solid var(--accent2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
}

.info-box p { margin: 0; color: var(--accent2); font-size: 0.92rem; }

.exercise-box {
  background: rgba(236,72,153,0.06);
  border-left: 3px solid var(--pink);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
}

.exercise-box .ex-label { font-weight: 600; color: var(--pink); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; }
.exercise-box p { margin: 0.3rem 0 0; color: var(--text); font-size: 0.92rem; }

/* ─── Download links ─── */
.download-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.download-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s;
}

.download-links a:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  background: rgba(124,58,237,0.08);
}

/* ─── File list ─── */
.file-list {
  list-style: none;
  margin: 1rem 0 !important;
}

.file-list li {
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.file-list li::before {
  content: '📄';
}

.file-list li.dir::before { content: '📁'; }

/* ─── Footer ─── */
.footer {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-dim);
  font-size: 0.82rem;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
}


.footer .copyright {
  margin-top: 0.5rem;
  color: var(--text-dim);
  font-size: 0.78rem;
  opacity: 0.7;
}

/* ─── Responsive ─── */
@media (max-width: 600px) {
  .nav { padding: 0 1rem; }
  .nav-links { gap: 0; }
  .nav-links a { padding: 0.3rem 0.5rem; font-size: 0.78rem; }
  .container { padding: 1rem; }
  .content { padding: 0 1rem 3rem; }
  .course-grid { grid-template-columns: 1fr; }
}