:root {
  --bg: #0a0a0f;
  --surface: #12121a;
  --surface2: #1a1a26;
  --border: #ffffff12;
  --border2: #ffffff22;
  --text: #f0f0f8;
  --muted: #8888aa;
  --accent: #7c6af7;
  --accent2: #a594fa;
  --green: #22d3a0;
  --blue: #4facfe;
  --amber: #f5a623;
  --rose: #f472b6;
  --coral: #fb923c;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  min-height: 100vh;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(124,106,247,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124,106,247,0.025) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.back-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  text-decoration: none;
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  transition: color 0.15s;
}
.back-link:hover { color: var(--accent2); }
.topbar-sep { color: var(--border2); font-size: 1.2rem; }
.topbar-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
}
.lang-toggle {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--border2);
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  transition: color 0.15s, border-color 0.15s;
}
.lang-toggle:hover { color: var(--accent2); border-color: var(--accent2); }
.content {
  max-width: 1060px;
  margin: 0 auto;
  padding: 3.5rem 2rem 5rem;
  position: relative;
}
.hero {
  margin-bottom: 3rem;
}
.hero-eyebrow {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  color: var(--accent2);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.7rem;
}
.hero h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent2) 60%, var(--blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.8rem;
  line-height: 1.15;
}
.hero-desc {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 640px;
}

/* Category filter */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}
.filter-btn {
  padding: 0.35rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--border2);
  background: transparent;
  color: var(--muted);
  font-family: 'DM Mono', monospace;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.15s;
}
.filter-btn:hover { color: var(--text); border-color: var(--border2); }
.filter-btn.active { background: rgba(124,106,247,0.1); border-color: var(--accent); color: var(--accent); }

/* Category section */
.cat-section { margin-bottom: 2.5rem; }
.cat-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1.2rem;
}
.cat-icon {
  width: 34px; height: 34px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
}
.cat-label {
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  font-weight: 700;
}
.cat-count {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border2);
}

/* Cards grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1rem;
}
.use-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  transition: all 0.2s;
  cursor: default;
}
.use-card:hover {
  border-color: var(--border2);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.3);
}
.use-card-top {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
}
.use-card-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}
.use-card-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.3;
  flex: 1;
}
.use-card-desc {
  font-size: 0.83rem;
  color: var(--muted);
  line-height: 1.6;
}

/* Skill badge */
.skill-badge {
  font-family: 'DM Mono', monospace;
  font-size: 0.78rem;
  color: var(--accent2);
  background: rgba(124,106,247,0.08);
  border: 1px solid rgba(124,106,247,0.25);
  border-radius: 6px;
  padding: 0.3rem 0.7rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  width: fit-content;
}

/* Prompt label */
.prompt-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.3rem;
}

/* Prompt box */
.use-card-prompt {
  background: var(--surface2);
  border-radius: 8px;
  padding: 0.65rem 0.9rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  color: var(--accent2);
  line-height: 1.5;
  border-left: 2px solid rgba(124,106,247,0.4);
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
}
.use-card-prompt:hover { border-left-color: var(--accent); background: rgba(124,106,247,0.06); }
.use-card-prompt::after {
  content: 'Copier';
  position: absolute;
  right: 0.7rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.65rem;
  color: var(--muted);
  opacity: 0;
  transition: opacity 0.15s;
}
.use-card-prompt:hover::after { opacity: 1; }
.use-card-prompt.copied { border-left-color: var(--green); color: var(--green); }
.use-card-prompt.copied::after { content: '✓'; color: var(--green); opacity: 1; }

/* Difficulty tag */
.diff-tag {
  display: inline-block;
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  margin-top: auto;
  align-self: flex-start;
}
.diff-debutant { background: rgba(34,211,160,0.1); color: var(--green); }
.diff-inter { background: rgba(245,166,35,0.1); color: var(--amber); }
.diff-avance { background: rgba(124,106,247,0.1); color: var(--accent2); }

/* Category color variants */
.cat-rapports .cat-icon { background: rgba(124,106,247,0.12); }
.cat-rapports .cat-label { color: var(--accent2); }
.cat-rapports .use-card-icon { background: rgba(124,106,247,0.1); }
.cat-rapports .use-card:hover { border-color: rgba(124,106,247,0.3); }

.cat-finance .cat-icon { background: rgba(79,172,254,0.12); }
.cat-finance .cat-label { color: var(--blue); }
.cat-finance .use-card-icon { background: rgba(79,172,254,0.1); }
.cat-finance .use-card:hover { border-color: rgba(79,172,254,0.3); }

.cat-marketing .cat-icon { background: rgba(34,211,160,0.12); }
.cat-marketing .cat-label { color: var(--green); }
.cat-marketing .use-card-icon { background: rgba(34,211,160,0.1); }
.cat-marketing .use-card:hover { border-color: rgba(34,211,160,0.3); }

.cat-rh .cat-icon { background: rgba(245,166,35,0.12); }
.cat-rh .cat-label { color: var(--amber); }
.cat-rh .use-card-icon { background: rgba(245,166,35,0.1); }
.cat-rh .use-card:hover { border-color: rgba(245,166,35,0.3); }

.cat-commercial .cat-icon { background: rgba(165,148,250,0.12); }
.cat-commercial .cat-label { color: var(--accent2); }
.cat-commercial .use-card-icon { background: rgba(165,148,250,0.1); }
.cat-commercial .use-card:hover { border-color: rgba(165,148,250,0.3); }

.cat-it .cat-icon { background: rgba(244,114,182,0.12); }
.cat-it .cat-label { color: var(--rose); }
.cat-it .use-card-icon { background: rgba(244,114,182,0.1); }
.cat-it .use-card:hover { border-color: rgba(244,114,182,0.3); }

.cat-direction .cat-icon { background: rgba(251,146,60,0.12); }
.cat-direction .cat-label { color: var(--coral); }
.cat-direction .use-card-icon { background: rgba(251,146,60,0.1); }
.cat-direction .use-card:hover { border-color: rgba(251,146,60,0.3); }