/* ═══════════════════════════════════════════════════════════════════
   Juego Óptimo — learning.css
   Estilos específicos del módulo de aprendizaje
   ═══════════════════════════════════════════════════════════════════ */

/* ── Game cards (índice de juegos) ───────────────────────────────── */
.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.1rem;
  margin-top: 1.5rem;
}
.game-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.2s, transform 0.15s;
  cursor: pointer;
}
.game-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.game-icon {
  width: 44px; height: 44px;
  background: var(--accent-glow);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  font-size: 1.3rem;
}
.game-card h2 { font-size: 1.15rem; color: var(--text); }
.game-card p  { font-size: 0.85rem; color: var(--text-muted); margin: 0; }
.game-meta {
  display: flex;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: auto;
}

/* ── Module list (vista de juego) ────────────────────────────────── */
.module-list { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 1.5rem; }

.module-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: border-color 0.2s;
}
.module-card.accessible:hover { border-color: var(--border-light); cursor: pointer; }
.module-card.locked { opacity: 0.55; cursor: not-allowed; }
.module-card.complete { border-color: rgba(34, 197, 94, 0.35); }

.module-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  background: var(--bg-hover);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  font-size: 1.1rem;
}
.module-card.accessible .module-icon { background: var(--accent-glow); color: var(--accent); }
.module-card.complete .module-icon { background: var(--success-bg); color: var(--success); }

.module-info { flex: 1; min-width: 0; }
.module-info h3 { font-size: 1rem; margin-bottom: 0.25rem; }
.module-info p  { font-size: 0.82rem; color: var(--text-muted); margin: 0 0 0.5rem; }

.module-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.module-percent { font-size: 0.8rem; color: var(--text-dim); }
.module-percent.done { color: var(--success); }

.module-actions { flex-shrink: 0; }

/* ── Lesson layout ───────────────────────────────────────────────── */
.lesson-wrap {
  display: flex;
  min-height: calc(100vh - var(--nav-h));
}

/* Sidebar */
.lesson-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  padding: 1.25rem 0;
  position: sticky;
  top: var(--nav-h);
  height: calc(100vh - var(--nav-h));
  overflow-y: auto;
  background: var(--bg-card);
}
.sidebar-header {
  padding: 0 1.25rem 0.75rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.5rem;
}
.sidebar-header a {
  font-size: 0.78rem;
  color: var(--text-dim);
  display: flex; align-items: center; gap: 0.3rem;
}
.sidebar-header a:hover { color: var(--text-muted); }
.sidebar-header h3 { font-size: 0.9rem; color: var(--text); margin-top: 0.5rem; }

.sidebar-lessons { list-style: none; }
.sidebar-lesson {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.55rem 1.25rem;
  border-left: 2px solid transparent;
  transition: background 0.15s;
  cursor: pointer;
}
.sidebar-lesson:hover { background: var(--bg-hover); }
.sidebar-lesson.active {
  border-left-color: var(--accent);
  background: var(--accent-glow);
}
.sidebar-lesson.done .lesson-num { color: var(--success); }
.lesson-num {
  font-size: 0.75rem;
  color: var(--text-dim);
  width: 18px;
  flex-shrink: 0;
  padding-top: 2px;
}
.lesson-title-side {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}
.sidebar-lesson.active .lesson-title-side { color: var(--text); }
.lesson-dur {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-left: auto;
  white-space: nowrap;
  padding-top: 2px;
}
.lesson-fav-dot {
  font-size: 0.6rem;
  color: var(--premium);
  flex-shrink: 0;
  padding-top: 3px;
}

/* Main content */
.lesson-main {
  flex: 1;
  min-width: 0;
  padding: 2rem 2.5rem;
  max-width: calc(var(--content-max) + 5rem);
}

.lesson-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}
.lesson-breadcrumb a { color: var(--text-dim); }
.lesson-breadcrumb a:hover { color: var(--text-muted); }
.lesson-breadcrumb span { color: var(--border-light); }

.lesson-header { margin-bottom: 2rem; }
.lesson-title-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}
.lesson-title-row h1 { flex: 1; font-size: 1.7rem; margin-bottom: 0; }
.btn-favorite {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.3rem;
  color: var(--text-dim);
  font-size: 1.35rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 0.35rem;
  transition: color 0.15s, transform 0.1s;
}
.btn-favorite:hover { color: var(--premium); transform: scale(1.15); }
.btn-favorite.favorited { color: var(--premium); }
.btn-favorite.favorited:hover { color: var(--text-dim); transform: scale(1.15); }
.lesson-meta-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.lesson-meta-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.difficulty-badge {
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
}
.diff-beginner    { background: var(--success-bg); color: var(--success); }
.diff-intermediate { background: var(--accent-glow); color: var(--accent); }
.diff-advanced    { background: var(--premium-bg); color: var(--premium); }

.lesson-content { margin-bottom: 2.5rem; }

/* Navegación inferior */
.lesson-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  gap: 1rem;
  flex-wrap: wrap;
}
.lesson-nav-prev, .lesson-nav-next {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s, color 0.15s;
}
.lesson-nav-prev:hover, .lesson-nav-next:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Mark complete */
.mark-complete-form { text-align: center; }
.mark-complete-done {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--success);
  font-size: 0.9rem;
  font-weight: 600;
}

/* ── Sidebar toggle mobile ───────────────────────────────────────── */
.lesson-sidebar-toggle {
  display: none;
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 50;
  width: 46px; height: 46px;
  background: var(--accent);
  color: #0f172a;
  border: none;
  border-radius: 50%;
  font-size: 1.1rem;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

@media (max-width: 768px) {
  .lesson-wrap { flex-direction: column; }
  .lesson-sidebar {
    position: fixed;
    top: var(--nav-h);
    left: -100%;
    width: 85%;
    max-width: 300px;
    height: calc(100vh - var(--nav-h));
    z-index: 40;
    transition: left 0.25s ease;
    box-shadow: 4px 0 20px rgba(0,0,0,0.4);
  }
  .lesson-sidebar.open { left: 0; }
  .lesson-main { padding: 1.25rem 1rem; }
  .lesson-sidebar-toggle { display: flex; align-items: center; justify-content: center; }
  .lesson-header h1 { font-size: 1.35rem; }
}