/* ============================================
   NEXUS.FR — Design System
   Aesthetic: Terminal utilitaire / Hacker lisible
   ============================================ */

:root {
  --bg:          #0a0b0d;
  --bg-2:        #0f1114;
  --bg-3:        #161920;
  --bg-4:        #1e2229;
  --border:      #252a33;
  --border-2:    #2e3542;
  --text:        #d4dae6;
  --text-muted:  #6b7585;
  --text-dim:    #4a5260;
  --accent:      #00e5a0;
  --accent-dim:  #00a870;
  --accent-glow: rgba(0, 229, 160, 0.12);
  --red:         #ff4757;
  --yellow:      #ffd32a;
  --blue:        #3b82f6;
  --font-mono:   'Space Mono', 'Courier New', monospace;
  --font-sans:   'Syne', system-ui, sans-serif;
  --radius:      3px;
  --max-w:       1100px;
  --header-h:    56px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-decoration-color: var(--accent-dim); }
img { max-width: 100%; display: block; }

/* ---- Layout ---- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}
.site-main { flex: 1; }

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}
.site-header .container {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 32px;
}
.logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.05em;
  flex-shrink: 0;
  text-decoration: none;
}
.logo:hover { text-decoration: none; }
.logo-bracket { color: var(--text-dim); }
.logo-accent { color: var(--accent); }

.main-nav {
  display: flex;
  gap: 4px;
  flex: 1;
}
.nav-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
  text-decoration: none;
  letter-spacing: 0.04em;
}
.nav-link:hover, .nav-link.active {
  color: var(--accent);
  background: var(--accent-glow);
  text-decoration: none;
}

.search-toggle {
  background: none;
  border: 1px solid var(--border-2);
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
}
.search-toggle:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
}

/* ---- Search Bar ---- */
.search-bar {
  display: none;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.search-bar.open { display: block; }
.search-bar .container { position: relative; }
#searchInput {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  padding: 10px 14px;
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.15s;
}
#searchInput:focus { border-color: var(--accent-dim); }
#searchInput::placeholder { color: var(--text-dim); }

.search-results {
  position: absolute;
  top: calc(100% + 8px);
  left: 20px; right: 20px;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  overflow: hidden;
  display: none;
  z-index: 200;
}
.search-results.has-results { display: block; }
.search-result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.1s;
  text-decoration: none;
  color: var(--text);
}
.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--bg-4); text-decoration: none; }
.search-result-name { font-weight: 600; font-size: 0.9rem; }
.search-result-usage { font-size: 0.8rem; color: var(--text-muted); }
.search-result-cat {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  background: var(--bg-4);
  padding: 2px 6px;
  border-radius: var(--radius);
}

/* ---- Hero ---- */
.hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--border);
}
.hero-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-label::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--accent);
}
.hero h1 {
  font-family: var(--font-sans);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.hero-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.7;
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.stat-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}
.stat-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ---- Category Grid ---- */
.section { padding: 40px 0; }
.section + .section { border-top: 1px solid var(--border); }
.section-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 24px;
}
.section-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.section-title-main {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}
.section-link {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  transition: color 0.15s;
}
.section-link:hover { color: var(--accent); text-decoration: none; }

.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
.cat-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s, background 0.15s;
  position: relative;
  overflow: hidden;
}
.cat-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: transparent;
  transition: background 0.15s;
}
.cat-card:hover {
  border-color: var(--border-2);
  background: var(--bg-3);
  text-decoration: none;
}
.cat-card:hover::before { background: var(--accent); }
.cat-icon { font-size: 1.5rem; flex-shrink: 0; }
.cat-info { flex: 1; min-width: 0; }
.cat-name {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 2px;
}
.cat-desc { font-size: 0.8rem; color: var(--text-muted); }
.cat-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  background: var(--bg-4);
  padding: 2px 8px;
  border-radius: 20px;
  flex-shrink: 0;
}

/* ---- Resource Card ---- */
.resource-list { display: flex; flex-direction: column; gap: 1px; }
.resource-card {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 2px 16px;
  padding: 16px 20px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s, background 0.15s;
  margin-bottom: 8px;
}
.resource-card:hover {
  border-color: var(--border-2);
  background: var(--bg-3);
}
.resource-card.essential {
  border-left: 2px solid var(--accent);
}
.resource-header {
  display: flex;
  align-items: center;
  gap: 10px;
  grid-column: 1;
}
.resource-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
}
.resource-name a {
  color: var(--text);
  transition: color 0.15s;
}
.resource-name a:hover { color: var(--accent); text-decoration: none; }
.resource-guide {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent-dim);
  border: 1px solid var(--accent-dim);
  padding: 1px 5px;
  border-radius: 2px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: background 0.15s;
}
.resource-guide:hover { background: var(--accent-glow); text-decoration: none; }

.resource-meta {
  grid-column: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.resource-usage { font-size: 0.85rem; color: var(--text-muted); }
.resource-why { font-size: 0.8rem; color: var(--text-dim); }
.resource-why::before { content: '→ '; color: var(--accent-dim); }

.resource-side {
  grid-column: 2;
  grid-row: 1 / 3;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: space-between;
  gap: 8px;
}
.resource-status {
  font-size: 0.9rem;
  line-height: 1;
}
.resource-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.tag { font-size: 0.85rem; line-height: 1; }
.resource-verified {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  white-space: nowrap;
}

/* ---- Category Page ---- */
.cat-page-header {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 12px;
  display: flex;
  gap: 6px;
  align-items: center;
}
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--accent); text-decoration: none; }
.breadcrumb-sep { color: var(--border-2); }

.cat-page-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.cat-page-desc { color: var(--text-muted); font-size: 0.95rem; }

/* ---- Sub-sections ---- */
.subsection { padding: 32px 0; }
.subsection + .subsection { border-top: 1px solid var(--border); }
.subsection-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.subsection-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.subsection-label {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  padding: 2px 6px;
  border-radius: 2px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.label-essential {
  background: rgba(0, 229, 160, 0.1);
  color: var(--accent);
  border: 1px solid rgba(0, 229, 160, 0.25);
}
.label-list {
  background: var(--bg-4);
  color: var(--text-dim);
  border: 1px solid var(--border);
}

/* ---- Guide Cards ---- */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}
.guide-card {
  padding: 16px 20px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.15s, background 0.15s;
}
.guide-card:hover {
  border-color: var(--border-2);
  background: var(--bg-3);
  text-decoration: none;
}
.guide-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.guide-title { font-weight: 700; font-size: 0.9rem; }
.guide-desc { font-size: 0.8rem; color: var(--text-muted); }
.guide-level {
  margin-top: 4px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ---- Guide Page ---- */
.guide-page { padding: 48px 0; max-width: 720px; }
.guide-page h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 32px 0 12px;
  color: var(--text);
}
.guide-page h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 24px 0 8px;
  color: var(--text-muted);
}
.guide-page p { color: var(--text-muted); margin-bottom: 12px; font-size: 0.9rem; line-height: 1.75; }
.guide-page ul, .guide-page ol {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding-left: 20px;
  margin-bottom: 12px;
}
.guide-page li { margin-bottom: 6px; line-height: 1.6; }
.guide-page code {
  font-family: var(--font-mono);
  background: var(--bg-3);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 2px;
  font-size: 0.85em;
  color: var(--accent);
}
.guide-page pre {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent-dim);
  padding: 16px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin-bottom: 16px;
}
.guide-page pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text);
}
.guide-page blockquote {
  border-left: 2px solid var(--accent-dim);
  padding: 8px 16px;
  margin-bottom: 12px;
  background: var(--accent-glow);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.guide-page blockquote p { color: var(--text); margin: 0; }

/* ---- Notice ---- */
.notice {
  display: flex;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  margin-bottom: 16px;
}
.notice-warn { background: rgba(255, 211, 42, 0.08); border: 1px solid rgba(255, 211, 42, 0.2); color: var(--yellow); }
.notice-info { background: var(--accent-glow); border: 1px solid rgba(0, 229, 160, 0.2); color: var(--accent); }

/* ---- Filter Bar ---- */
.filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 10px;
  border: 1px solid var(--border-2);
  border-radius: 20px;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
  letter-spacing: 0.04em;
}
.filter-btn:hover, .filter-btn.active {
  background: var(--accent-glow);
  border-color: var(--accent-dim);
  color: var(--accent);
}

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  margin-top: auto;
}
.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-left {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.footer-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
}
.footer-note {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .main-nav { display: none; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
  .cat-grid { grid-template-columns: 1fr; }
  .resource-card {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }
  .resource-side {
    grid-column: 1;
    grid-row: auto;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    margin-top: 8px;
  }
  .footer-left, .footer-right { font-size: 0.7rem; }
  .footer-note { display: none; }
}

/* ---- Utilities ---- */
.mono { font-family: var(--font-mono); }
.muted { color: var(--text-muted); }
.accent { color: var(--accent); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-8 { margin-bottom: 8px; }
.hidden { display: none; }

/* ---- Animations ---- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.resource-card { animation: fadeIn 0.2s ease both; }
.resource-card:nth-child(2) { animation-delay: 0.04s; }
.resource-card:nth-child(3) { animation-delay: 0.08s; }
.resource-card:nth-child(4) { animation-delay: 0.12s; }
.resource-card:nth-child(5) { animation-delay: 0.16s; }