/* ═══════════════════════════════════════════════════════════════════════════
   SYMFONY 8 CHEATSHEET — Design System
   Palette : Learning-optimized — Indigo/Slate avec accents sémantiques
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── TOKENS CLAIR ─── */
:root {
  --bg:            #f8fafc;
  --bg-surface:    #ffffff;
  --bg-raised:     #f1f5f9;
  --bg-code:       #0f172a;
  --sidebar-bg:    #ffffff;
  --sidebar-w:     272px;
  --sidebar-w-sm:  64px;

  --text:          #1e293b;
  --text-muted:    #64748b;
  --text-faint:    #94a3b8;
  --text-code:     #e2e8f0;

  --border:        #e2e8f0;
  --border-strong: #cbd5e1;

  --accent:        #6366f1;
  --accent-light:  #eef2ff;
  --accent-hover:  #4f46e5;

  --diff-beginner:     #10b981;
  --diff-intermediate: #f59e0b;
  --diff-advanced:     #ef4444;

  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  14px;
  --radius-xl:  20px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:  0 4px 16px rgba(0,0,0,.08);
  --shadow-lg:  0 20px 60px rgba(0,0,0,.12);

  --transition: 200ms cubic-bezier(.4,0,.2,1);
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace;
}

/* ─── TOKENS SOMBRE ─── */
[data-theme="dark"] {
  --bg:            #0d1117;
  --bg-surface:    #161b22;
  --bg-raised:     #1c2333;
  --bg-code:       #010409;
  --sidebar-bg:    #161b22;

  --text:          #e6edf3;
  --text-muted:    #8b949e;
  --text-faint:    #484f58;
  --text-code:     #c9d1d9;

  --border:        #30363d;
  --border-strong: #3d444d;

  --accent:        #818cf8;
  --accent-light:  #1a1f3a;
  --accent-hover:  #6366f1;

  --diff-beginner:     #34d399;
  --diff-intermediate: #fbbf24;
  --diff-advanced:     #f87171;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.3);
  --shadow-md:  0 4px 16px rgba(0,0,0,.4);
  --shadow-lg:  0 20px 60px rgba(0,0,0,.6);
}

/* ═══════════════════════════════════════════════════════ RESET & BASE */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 15px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}
.hidden { display: none !important; }

/* ═══════════════════════════════════════════════════════ LAYOUT */
.app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}
.main-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ═══════════════════════════════════════════════════════ SIDEBAR */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
  transition: width var(--transition), background var(--transition);
  position: relative;
  z-index: 10;
}
.sidebar.collapsed { width: var(--sidebar-w-sm); }

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 16px 16px;
  border-bottom: 1px solid var(--border);
  min-height: 64px;
  flex-shrink: 0;
}
.sidebar-brand { display: flex; align-items: center; gap: 10px; overflow: hidden; }
.brand-icon { font-size: 22px; flex-shrink: 0; width: 32px; text-align: center; }
.brand-text {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -.3px;
  white-space: nowrap;
  background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: opacity var(--transition), width var(--transition);
}
.sidebar.collapsed .brand-text { opacity: 0; width: 0; overflow: hidden; }

.sidebar-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: all var(--transition);
}
.sidebar-toggle:hover { background: var(--bg-raised); color: var(--text); }
.sidebar-toggle svg { width: 16px; height: 16px; transition: transform var(--transition); }
.sidebar.collapsed .sidebar-toggle svg { transform: rotate(180deg); }

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.nav-divider { height: 1px; background: var(--border); margin: 8px 4px; flex-shrink: 0; }
.nav-section-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-faint);
  padding: 4px 8px 2px;
  white-space: nowrap;
  overflow: hidden;
  transition: opacity var(--transition);
}
.sidebar.collapsed .nav-section-title { opacity: 0; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 8px;
  border: none;
  background: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text-muted);
  text-align: left;
  transition: all var(--transition);
  white-space: nowrap;
  overflow: hidden;
  min-height: 38px;
  position: relative;
}
.nav-item:hover { background: var(--bg-raised); color: var(--text); }
.nav-item.active { background: var(--accent-light); color: var(--accent); }
.nav-item.active .nav-count { background: color-mix(in srgb, var(--accent) 15%, transparent); color: var(--accent); }

.nav-icon { font-size: 17px; flex-shrink: 0; width: 24px; text-align: center; line-height: 1; }
.nav-label { flex: 1; font-size: 13.5px; font-weight: 500; overflow: hidden; text-overflow: ellipsis; transition: opacity var(--transition); }
.nav-count {
  font-size: 11px; font-weight: 600;
  background: var(--bg-raised); color: var(--text-faint);
  padding: 1px 7px; border-radius: 99px;
  flex-shrink: 0;
  transition: opacity var(--transition);
}
.sidebar.collapsed .nav-label { opacity: 0; }
.sidebar.collapsed .nav-count { opacity: 0; width: 0; padding: 0; }

.sidebar-footer { padding: 8px; border-top: 1px solid var(--border); flex-shrink: 0; }
.theme-toggle {
  display: flex; align-items: center; gap: 10px;
  width: 100%; padding: 8px;
  border: none; background: none;
  border-radius: var(--radius-md);
  cursor: pointer; color: var(--text-muted);
  transition: all var(--transition); overflow: hidden;
}
.theme-toggle:hover { background: var(--bg-raised); color: var(--text); }
.theme-icon { font-size: 17px; width: 24px; text-align: center; flex-shrink: 0; }
.theme-icon--dark { display: none; }
[data-theme="dark"] .theme-icon--light { display: none; }
[data-theme="dark"] .theme-icon--dark { display: inline; }

/* ═══════════════════════════════════════════════════════ TOP BAR */
.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 0 24px; height: 64px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  transition: background var(--transition);
}
.topbar-menu-btn {
  display: none; background: none; border: none;
  color: var(--text-muted); cursor: pointer;
  padding: 6px; border-radius: var(--radius-sm);
}
.topbar-menu-btn svg { width: 20px; height: 20px; display: block; }
.topbar-right { display: flex; align-items: center; gap: 12px; margin-left: auto; }
.topbar-link {
  display: flex; align-items: center; gap: 6px;
  font-size: 12.5px; font-weight: 500;
  color: var(--text-muted); text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--border); border-radius: var(--radius-md);
  transition: all var(--transition);
}
.topbar-link:hover { color: var(--accent); border-color: var(--accent); }
.topbar-link svg { width: 13px; height: 13px; }

/* Search bar */
.search-bar {
  flex: 1; max-width: 540px;
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 0 16px; height: 40px;
  cursor: pointer;
  transition: all var(--transition);
}
.search-bar:hover { border-color: var(--accent); background: var(--bg-surface); }
.search-icon { width: 16px; height: 16px; color: var(--text-faint); flex-shrink: 0; }
.search-input {
  flex: 1; border: none; background: transparent;
  color: var(--text); font-size: 13.5px; outline: none; cursor: pointer;
}
.search-input::placeholder { color: var(--text-faint); }
.search-kbd {
  font-size: 11px; color: var(--text-faint);
  background: var(--border); border-radius: 4px;
  padding: 2px 6px; font-family: var(--font-mono);
  border: 1px solid var(--border-strong); flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════ MAIN CONTENT */
.main-content {
  flex: 1; overflow-y: auto; padding: 32px;
}
.main-content::-webkit-scrollbar { width: 6px; }
.main-content::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.view { animation: fadeIn .2s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.page-hero { margin-bottom: 40px; text-align: center; padding: 24px 0; }
.page-title { font-size: 2.4rem; font-weight: 800; letter-spacing: -.04em; }
.page-title-accent {
  background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.page-subtitle { margin-top: 10px; color: var(--text-muted); font-size: 15px; }

/* ─── Category Section ─── */
.category-section { margin-bottom: 56px; }
.category-header {
  display: flex; align-items: center; gap: 16px;
  margin-bottom: 20px; padding: 16px 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--cat-color, var(--accent));
  border-radius: var(--radius-lg);
  position: sticky; top: 0; z-index: 2;
  backdrop-filter: blur(12px);
  transition: background var(--transition);
}
.category-header-icon { font-size: 26px; flex-shrink: 0; }
.category-header-title { font-size: 19px; font-weight: 700; letter-spacing: -.02em; }
.category-header-desc { font-size: 13px; color: var(--text-muted); margin-top: 2px; }
.category-header-count { margin-left: auto; font-size: 13px; font-weight: 600; color: var(--text-faint); }

/* ─── Feature Grid ─── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 14px;
}

/* ─── Feature Card ─── */
.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  display: flex; flex-direction: column; gap: 10px;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition), opacity var(--transition);
}
.feature-card:hover { box-shadow: var(--shadow-md); border-color: var(--border-strong); transform: translateY(-1px); }
.feature-card.dim { opacity: .3; pointer-events: none; }
.feature-card.highlight { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 15%, transparent); }

.feature-card-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.feature-meta { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.feature-tags { display: flex; flex-wrap: wrap; gap: 4px; }

.feature-title { font-size: 15px; font-weight: 700; letter-spacing: -.02em; font-family: var(--font-mono); }
.feature-desc { font-size: 13.5px; color: var(--text-muted); line-height: 1.65; flex: 1; }

/* Badges */
.badge {
  display: inline-flex; align-items: center;
  padding: 2px 8px; border-radius: 99px;
  font-size: 11px; font-weight: 600; letter-spacing: .02em; white-space: nowrap;
}
.badge--beginner     { background: color-mix(in srgb, var(--diff-beginner)     12%, transparent); color: var(--diff-beginner); }
.badge--intermediate { background: color-mix(in srgb, var(--diff-intermediate) 12%, transparent); color: var(--diff-intermediate); }
.badge--advanced     { background: color-mix(in srgb, var(--diff-advanced)     12%, transparent); color: var(--diff-advanced); }
.badge--type  { background: var(--bg-raised); color: var(--text-muted); }
.badge--since { background: color-mix(in srgb, var(--accent) 10%, transparent); color: var(--accent); }

.tag {
  display: inline-flex; align-items: center;
  padding: 2px 7px; border-radius: 4px;
  font-size: 10.5px; font-weight: 600;
  background: color-mix(in srgb, var(--tag-color) 12%, transparent);
  color: var(--tag-color); white-space: nowrap;
}

/* Code blocks */
.feature-examples { display: flex; flex-direction: column; gap: 6px; }
.code-block { border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }
.code-block-header {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; background: var(--bg-raised);
  cursor: pointer; list-style: none;
  transition: background var(--transition); font-size: 13px;
}
.code-block-header::-webkit-details-marker { display: none; }
.code-block-header:hover { background: var(--border); }
.code-block[open] .code-block-header { background: var(--bg-code); color: var(--text-code); }
.code-block[open] .code-chevron { transform: rotate(90deg); }

.code-lang {
  font-size: 10px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; padding: 2px 7px; border-radius: 4px; flex-shrink: 0;
}
.code-lang--php   { background: #6366f120; color: #818cf8; }
.code-lang--yaml  { background: #10b98120; color: #34d399; }
.code-lang--xml   { background: #f59e0b20; color: #fbbf24; }
.code-lang--env   { background: #ef444420; color: #f87171; }
.code-lang--twig  { background: #06b6d420; color: #22d3ee; }

.code-title { flex: 1; font-weight: 500; font-size: 12.5px; transition: color var(--transition); }
.code-block[open] .code-title { color: var(--text-code); }
.code-chevron { width: 14px; height: 14px; color: var(--text-faint); flex-shrink: 0; transition: transform var(--transition); }
.code-desc { padding: 8px 14px; font-size: 12.5px; color: var(--text-muted); background: var(--bg-code); border-bottom: 1px solid #ffffff10; }
.code-pre {
  background: var(--bg-code); color: var(--text-code);
  padding: 16px; overflow-x: auto; margin: 0;
  font-family: var(--font-mono); font-size: 12.5px; line-height: 1.7;
}
.code-pre::-webkit-scrollbar { height: 4px; }
.code-pre::-webkit-scrollbar-thumb { background: #ffffff20; border-radius: 2px; }

/* ═══════════════════════════════════════════════════════ GLOSSAIRE */
.glossary-grid { columns: 2; column-gap: 16px; }
@media (max-width: 800px) { .glossary-grid { columns: 1; } }
.term-card {
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 18px;
  margin-bottom: 14px; break-inside: avoid;
  transition: box-shadow var(--transition);
}
.term-card:hover { box-shadow: var(--shadow-sm); }
.term-name { font-size: 15px; font-weight: 700; color: var(--accent); margin-bottom: 8px; font-family: var(--font-mono); }
.term-def { font-size: 13.5px; color: var(--text-muted); line-height: 1.65; }

/* ═══════════════════════════════════════════════════════ SEARCH OVERLAY */
.search-overlay {
  position: fixed; inset: 0; z-index: 1000;
  display: flex; align-items: flex-start; justify-content: center;
  padding-top: 10vh;
}
.search-overlay-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.55); backdrop-filter: blur(6px);
}
.search-overlay-panel {
  position: relative; width: 100%; max-width: 680px;
  background: var(--bg-surface);
  border: 1px solid var(--border); border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg); overflow: hidden;
  animation: overlayIn .15s ease;
}
@keyframes overlayIn {
  from { opacity: 0; transform: scale(.97) translateY(-8px); }
  to   { opacity: 1; transform: none; }
}
.search-overlay-input-wrap {
  display: flex; align-items: center; gap: 14px;
  padding: 18px 20px; border-bottom: 1px solid var(--border);
}
.search-overlay-input-wrap svg { width: 20px; height: 20px; color: var(--text-faint); flex-shrink: 0; }
.search-overlay-input {
  flex: 1; border: none; background: transparent;
  font-size: 17px; color: var(--text); outline: none;
}
.search-overlay-input::placeholder { color: var(--text-faint); }
.search-overlay-close {
  background: none; border: 1px solid var(--border); border-radius: var(--radius-sm);
  cursor: pointer; color: var(--text-muted); padding: 4px 8px;
  font-size: 11px; font-family: var(--font-mono); transition: all var(--transition);
}
.search-overlay-close:hover { background: var(--bg-raised); color: var(--text); }
.search-results { max-height: 60vh; overflow-y: auto; padding: 8px; }
.search-results::-webkit-scrollbar { width: 4px; }
.search-results::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
.search-hint { padding: 24px 20px; text-align: center; color: var(--text-muted); font-size: 14px; line-height: 1.7; }
.search-section-title {
  font-size: 10px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .08em; color: var(--text-faint); padding: 8px 12px 4px;
}
.search-result-item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 11px 12px; border-radius: var(--radius-md);
  cursor: pointer; border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition);
}
.search-result-item:hover, .search-result-item.focused {
  background: var(--accent-light);
  border-color: color-mix(in srgb, var(--accent) 25%, transparent);
}
.search-result-cat-icon {
  font-size: 18px; width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-raised); border-radius: var(--radius-sm); flex-shrink: 0;
}
.search-result-body { flex: 1; min-width: 0; }
.search-result-name {
  font-size: 14px; font-weight: 600; color: var(--text);
  font-family: var(--font-mono); margin-bottom: 3px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.search-result-meta { display: flex; align-items: center; gap: 8px; font-size: 11.5px; color: var(--text-muted); flex-wrap: wrap; }
.search-result-desc {
  font-size: 12.5px; color: var(--text-muted); margin-top: 4px;
  overflow: hidden; display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical;
}
.search-result-arrow { color: var(--text-faint); font-size: 18px; flex-shrink: 0; align-self: center; }
.search-no-result { padding: 32px 20px; text-align: center; color: var(--text-muted); font-size: 14px; }
.search-no-result strong { color: var(--text); }

/* ═══════════════════════════════════════════════════════ RESPONSIVE */
@media (max-width: 900px) {
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0; z-index: 50;
    transform: translateX(-100%);
    transition: transform var(--transition);
    width: var(--sidebar-w) !important;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.mobile-open { transform: translateX(0); }
  .topbar-menu-btn { display: flex; }
  .features-grid { grid-template-columns: 1fr; }
  .main-content { padding: 20px 16px; }
}
@media (max-width: 640px) {
  .search-overlay { padding-top: 0; align-items: flex-end; }
  .search-overlay-panel { border-radius: var(--radius-xl) var(--radius-xl) 0 0; }
  .page-title { font-size: 1.8rem; }
}
* { scrollbar-width: thin; scrollbar-color: var(--border) transparent; }