/* ─── JUANMA CANAS — Campus Informática ─── */
:root {
  --bg: #f8f9fa;
  --surface: #ffffff;
  --border: #e9ecef;
  --text: #212529;
  --text-muted: #6c757d;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: #eff6ff;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --max-w: 960px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}

/* ─── Layout ─── */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}

/* ─── Header ─── */
header{
  background:var(--surface);
  border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:100;
  backdrop-filter:blur(12px);
  background:rgba(255,255,255,.92);
}
header .container{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;
}
header .logo{
  font-weight:700;font-size:1.2rem;color:var(--text);text-decoration:none;
  display:flex;align-items:center;gap:8px;
}
header .logo span{color:var(--accent)}
header nav{display:flex;gap:4px}
header nav a{
  text-decoration:none;color:var(--text-muted);font-size:.9rem;
  padding:6px 14px;border-radius:8px;transition:.2s;
}
header nav a:hover{color:var(--text);background:var(--bg)}

/* ─── Hero ─── */
.hero{
  text-align:center;padding:80px 0 60px;
  background:linear-gradient(135deg,#eff6ff 0%,#f8f9fa 100%);
}
.hero h1{font-size:2.8rem;font-weight:800;letter-spacing:-.03em;margin-bottom:12px}
.hero h1 span{color:var(--accent)}
.hero p{font-size:1.15rem;color:var(--text-muted);max-width:600px;margin:0 auto 8px}
.hero .badge{
  display:inline-block;background:var(--accent-light);color:var(--accent);
  font-size:.8rem;font-weight:600;padding:4px 14px;border-radius:20px;margin-bottom:16px;
}

/* ─── Course Grid ─── */
.section{padding:48px 0}
.section-title{font-size:1.5rem;font-weight:700;margin-bottom:6px}
.section-sub{color:var(--text-muted);margin-bottom:28px}
.grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;
}
.card{
  background:var(--surface);border-radius:var(--radius);padding:24px;
  border:1px solid var(--border);transition:.25s;cursor:pointer;
  text-decoration:none;color:inherit;display:block;
}
.card:hover{
  border-color:var(--accent);box-shadow:var(--shadow-lg);
  transform:translateY(-2px);
}
.card .icon{font-size:2rem;margin-bottom:10px}
.card h3{font-size:1.1rem;font-weight:600;margin-bottom:4px}
.card p{font-size:.9rem;color:var(--text-muted);line-height:1.5}
.card .meta{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.card .tag{
  font-size:.75rem;background:var(--bg);padding:2px 10px;border-radius:6px;
  color:var(--text-muted);font-weight:500;
}
.card .tag.hot{background:#fef2f2;color:#dc2626}
.card .tag.new{background:var(--accent-light);color:var(--accent)}

/* ─── Course Detail ─── */
.course-header{padding:48px 0 24px}
.course-header h1{font-size:2rem;font-weight:700;margin-bottom:4px}
.course-header .breadcrumb{font-size:.85rem;color:var(--text-muted);margin-bottom:16px}
.course-header .breadcrumb a{color:var(--accent);text-decoration:none}
.course-header .breadcrumb a:hover{text-decoration:underline}
.lesson-list{list-style:none}
.lesson-list li{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  margin-bottom:8px;transition:.2s;
}
.lesson-list li:hover{border-color:var(--accent)}
.lesson-list a{
  display:flex;align-items:center;gap:12px;padding:16px 20px;
  text-decoration:none;color:inherit;
}
.lesson-list .num{
  width:32px;height:32px;border-radius:50%;background:var(--bg);
  display:flex;align-items:center;justify-content:center;
  font-size:.8rem;font-weight:600;color:var(--text-muted);flex-shrink:0;
}
.lesson-list .info{flex:1}
.lesson-list .info strong{display:block;font-size:.95rem}
.lesson-list .info small{color:var(--text-muted);font-size:.8rem}
.lesson-list .arrow{color:var(--text-muted);font-size:1.1rem}

/* ─── Lesson Content ─── */
.lesson-content{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:40px;margin:24px 0 48px;line-height:1.8;
}
.lesson-content h2{font-size:1.5rem;font-weight:700;margin:28px 0 12px}
.lesson-content h2:first-child{margin-top:0}
.lesson-content h3{font-size:1.15rem;font-weight:600;margin:20px 0 8px}
.lesson-content p{margin-bottom:14px;color:#374151}
.lesson-content ul,.lesson-content ol{padding-left:24px;margin-bottom:14px}
.lesson-content li{margin-bottom:4px}
.lesson-content code{
  font-family:var(--mono);font-size:.875em;
  background:#f1f5f9;padding:2px 6px;border-radius:4px;
}
.lesson-content pre{
  background:#1e293b;color:#e2e8f0;border-radius:8px;
  padding:20px;overflow-x:auto;margin-bottom:16px;font-size:.875rem;
  font-family:var(--mono);line-height:1.6;
}
.lesson-content pre code{background:none;padding:0;color:inherit;font-size:inherit}
.lesson-content blockquote{
  border-left:3px solid var(--accent);padding:12px 20px;margin:16px 0;
  background:var(--accent-light);border-radius:0 8px 8px 0;
}
.lesson-content .info-box{
  background:var(--accent-light);border-radius:8px;padding:16px 20px;margin:16px 0;
  border-left:3px solid var(--accent);
}
.lesson-content .info-box strong{color:var(--accent)}

/* ─── Footer ─── */
footer{
  border-top:1px solid var(--border);padding:32px 0;margin-top:48px;
  text-align:center;font-size:.85rem;color:var(--text-muted);
}
footer a{color:var(--accent);text-decoration:none}

/* ─── Responsive ─── */
@media(max-width:640px){
  .hero h1{font-size:2rem}
  header .container{height:56px}
  header nav{gap:0}
  header nav a{padding:6px 10px;font-size:.82rem}
  .lesson-content{padding:24px}
  .grid{grid-template-columns:1fr}
}

/* ─── Animations ─── */
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.hero,.card,.section{animation:fadeUp .5s ease-out both}
.card:nth-child(1){animation-delay:.05s}
.card:nth-child(2){animation-delay:.1s}
.card:nth-child(3){animation-delay:.15s}
.card:nth-child(4){animation-delay:.2s}
.card:nth-child(5){animation-delay:.25s}
.card:nth-child(6){animation-delay:.3s}