/* ============================================================
   NOUSLAB ACADEMY — Estilos base
   Mismos tokens de marca que nouslab.io (css/style.css) para que
   se sienta parte de la misma familia visual, autocontenido porque
   academy.nouslab.io es un subdominio (no puede referenciar el CSS
   del dominio principal por URL relativa).
   ============================================================ */

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

:root {
  --primary: #705df2;
  --accent: #842cf2;
  --bg-deep: #150c21;
  --bg-base: #0f0e11;
  --white: #FFFFFF;
  --gray-100: #f0f0f5;
  --gray-200: #c8c8d4;
  --gray-300: #9b9baf;
  --gray-400: #6b6b80;
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glow-primary: rgba(112, 93, 242, 0.4);
  --success: #34d399;
  --danger: #f87171;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html { -webkit-font-smoothing: antialiased; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-base);
  color: var(--gray-200);
  line-height: 1.6;
  min-height: 100vh;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font-family: inherit; }

.container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 24px; }

.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--accent), #b86ef7);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* ---------------- Navbar ---------------- */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(15, 14, 17, 0.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
}
.nav-container { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; }
.nav-logo { font-family: inherit; font-weight: 800; font-size: 20px; color: var(--white); display: flex; align-items: baseline; gap: 6px; }
.nav-logo .accent { color: var(--primary); }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--gray-300); font-size: 14px; font-weight: 500; transition: var(--transition); }
.nav-links a:hover { color: var(--white); }
.nav-user { display: flex; align-items: center; gap: 14px; }

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 600; font-size: 14px; border: none; cursor: pointer;
  transition: var(--transition); border-radius: var(--radius-md); padding: 12px 24px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent)); color: var(--white);
  box-shadow: 0 0 20px var(--glow-primary);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 30px var(--glow-primary); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-ghost { background: transparent; border: 1px solid var(--glass-border); color: var(--gray-200); }
.btn-ghost:hover { border-color: var(--primary); color: var(--white); }
.btn-block { width: 100%; }
.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-danger { background: rgba(248, 113, 113, 0.12); color: var(--danger); }

/* ---------------- Layout ---------------- */
.page { min-height: calc(100vh - 70px); padding: 56px 0 96px; }
.page-header { margin-bottom: 40px; }
.page-title { font-size: clamp(28px, 4vw, 40px); font-weight: 800; color: var(--white); margin-bottom: 8px; }
.page-desc { color: var(--gray-300); font-size: 15px; max-width: 560px; }

/* ---------------- Cards ---------------- */
.card {
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius-lg);
  backdrop-filter: blur(10px); padding: 24px; transition: var(--transition);
}
.card:hover { border-color: rgba(112, 93, 242, 0.35); transform: translateY(-3px); }

/* ---- Buscador y filtros del catálogo ---- */
.catalog-toolbar { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; margin-bottom: 28px; }
.catalog-search { flex: 1; min-width: 220px; position: relative; }
.catalog-search svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--gray-400); pointer-events: none; }
.catalog-search input { width: 100%; padding: 12px 16px 12px 42px; border-radius: 999px; border: 1px solid var(--glass-border); background: rgba(255,255,255,0.03); color: var(--white); font-size: 14px; }
.catalog-search input:focus { outline: none; border-color: var(--primary); }
.category-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.category-pill { padding: 8px 16px; border-radius: 999px; border: 1px solid var(--glass-border); background: transparent; color: var(--gray-300); font-size: 13px; font-weight: 600; cursor: pointer; transition: var(--transition); }
.category-pill:hover { border-color: rgba(112,93,242,0.4); color: var(--white); }
.category-pill.active { background: linear-gradient(135deg, var(--primary), var(--accent)); color: var(--white); border-color: transparent; }

.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.course-card { display: flex; flex-direction: column; gap: 14px; cursor: pointer; }
.course-cover {
  height: 140px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(112,93,242,0.25), rgba(132,44,242,0.15));
  display: flex; align-items: center; justify-content: center; color: var(--primary);
}
.course-title { color: var(--white); font-size: 18px; font-weight: 700; }
.course-subtitle { color: var(--gray-300); font-size: 14px; }
.course-price { font-weight: 700; color: var(--accent); }
.course-price.free { color: var(--success); }
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: 999px; background: rgba(112,93,242,0.12); color: var(--primary); font-size: 12px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; width: fit-content; }
.badge-draft { background: rgba(251, 191, 36, 0.12); color: #fbbf24; }

/* ---------------- Forms ---------------- */
.auth-wrapper { max-width: 420px; margin: 64px auto; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; color: var(--gray-300); margin-bottom: 6px; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border); background: rgba(255,255,255,0.03); color: var(--white); font-size: 14px;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); }
.form-error { color: var(--danger); font-size: 13px; margin-top: 10px; min-height: 18px; }
.form-note { text-align: center; margin-top: 18px; font-size: 14px; color: var(--gray-300); }
.form-note a { color: var(--primary); font-weight: 600; }

/* ---------------- Course detail / player ---------------- */
.course-layout { display: grid; grid-template-columns: 2fr 1fr; gap: 32px; align-items: start; }
@media (max-width: 860px) { .course-layout { grid-template-columns: 1fr; } }
.video-frame {
  aspect-ratio: 16/9; width: 100%; border-radius: var(--radius-lg); overflow: hidden;
  background: var(--bg-deep); display: flex; align-items: center; justify-content: center; color: var(--gray-400); text-align: center; padding: 24px;
}
.video-frame iframe { width: 100%; height: 100%; border: none; }
.module-list { display: flex; flex-direction: column; gap: 20px; }
.module-title { color: var(--white); font-weight: 700; margin-bottom: 10px; font-size: 15px; }
.lesson-item {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: var(--radius-sm);
  border: 1px solid transparent; cursor: pointer; transition: var(--transition);
}
.lesson-item:hover { background: rgba(255,255,255,0.03); }
.lesson-item.active { border-color: var(--primary); background: rgba(112,93,242,0.08); }
.lesson-item.locked { opacity: 0.45; cursor: not-allowed; }
.lesson-check { width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--gray-400); flex-shrink: 0; }
.lesson-check.done { background: var(--success); border-color: var(--success); }

.progress-bar { height: 8px; border-radius: 99px; background: rgba(255,255,255,0.06); overflow: hidden; }
.progress-bar-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 99px; }

/* ---------------- Admin ---------------- */
.admin-table { width: 100%; border-collapse: collapse; margin-top: 20px; }
.admin-table th, .admin-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--glass-border); font-size: 14px; }
.admin-table th { color: var(--gray-400); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
.admin-panel { display: grid; grid-template-columns: 320px 1fr; gap: 32px; align-items: start; }
@media (max-width: 900px) { .admin-panel { grid-template-columns: 1fr; } }

.empty-state { text-align: center; padding: 60px 20px; color: var(--gray-400); }
.toast {
  position: fixed; bottom: 24px; right: 24px; background: var(--bg-deep); border: 1px solid var(--glass-border);
  border-radius: var(--radius-md); padding: 14px 20px; color: var(--white); font-size: 14px; z-index: 999;
  box-shadow: 0 10px 40px rgba(0,0,0,0.4);
}
.toast.error { border-color: var(--danger); color: var(--danger); }