/* ---------------------------------------------------------------------------
   KuraClaw SkillHub — styles
   --------------------------------------------------------------------------- */

:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-card-hover: #222636;
  --bg-header: #141720;
  --border: #2a2e3d;
  --text: #e4e6ed;
  --text-muted: #8b8fa3;
  --accent: #6c72cb;
  --accent-light: #8b90e0;

  --green: #34d399;
  --green-bg: rgba(52, 211, 153, 0.12);
  --blue: #60a5fa;
  --blue-bg: rgba(96, 165, 250, 0.12);
  --purple: #a78bfa;
  --purple-bg: rgba(167, 139, 250, 0.12);

  --cat-utility: #f59e0b;
  --cat-developer: #3b82f6;
  --cat-productivity: #10b981;
  --cat-hardware: #ef4444;

  --radius: 10px;
  --radius-sm: 6px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- Header --- */

header {
  background: var(--bg-header);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
}

.logo-text {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  max-width: 480px;
  justify-content: flex-end;
}

.search-box {
  flex: 1;
}

.search-box input {
  width: 100%;
  padding: 0.5rem 0.85rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s;
}

.search-box input:focus {
  border-color: var(--accent);
}

.lang-btn {
  padding: 0.4rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s;
  flex-shrink: 0;
}

.lang-btn:hover {
  border-color: var(--accent);
}

/* --- Main --- */

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  flex: 1;
  width: 100%;
}

/* --- Hero --- */

.hero {
  text-align: center;
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hero p {
  color: var(--text-muted);
  font-size: 1rem;
}

/* --- Category Tabs --- */

.category-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.tab {
  padding: 0.45rem 1rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.tab:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* --- Skills Grid --- */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1rem;
}

/* --- Skill Card --- */

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: background 0.2s, border-color 0.2s;
}

.skill-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
}

.skill-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.skill-name {
  font-size: 1.05rem;
  font-weight: 600;
}

.skill-badges {
  display: flex;
  gap: 0.4rem;
  flex-shrink: 0;
}

.badge {
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-free { background: var(--green-bg); color: var(--green); }
.badge-plus { background: var(--blue-bg); color: var(--blue); }
.badge-pro  { background: var(--purple-bg); color: var(--purple); }

.badge-category {
  background: rgba(255,255,255,0.06);
  color: var(--text-muted);
}
.badge-category[data-cat="utility"]       { color: var(--cat-utility); }
.badge-category[data-cat="developer"]     { color: var(--cat-developer); }
.badge-category[data-cat="productivity"]  { color: var(--cat-productivity); }
.badge-category[data-cat="hardware"]      { color: var(--cat-hardware); }

.skill-description {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.skill-purpose {
  font-size: 0.875rem;
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.skill-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.meta-tag {
  padding: 0.15rem 0.45rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

/* --- Empty State --- */

.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-muted);
  font-size: 1rem;
}

/* --- Loading --- */

.loading {
  display: flex;
  justify-content: center;
  padding: 3rem;
}

.loading[hidden] {
  display: none;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* --- Footer --- */

footer {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 1.5rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* --- Responsive --- */

@media (max-width: 640px) {
  .header-inner {
    flex-wrap: wrap;
  }
  .header-controls {
    max-width: 100%;
    width: 100%;
  }
  .hero h1 {
    font-size: 1.35rem;
  }
  .skills-grid {
    grid-template-columns: 1fr;
  }
}