/* ═══════════════════════════════════════════════════════════════
   CryptoClaw Skills Hub — Global Stylesheet
   ═══════════════════════════════════════════════════════════════ */

/* ─── CSS Variables ─── */
:root {
  --bg:          #0a0e1a;
  --bg-mid:      #0f1522;
  --card:        #111827;
  --card-hover:  #161e2e;
  --accent:      #00E5CC;
  --accent-dim:  #00b8a4;
  --accent-glow: rgba(0, 229, 204, 0.15);
  --gold:        #c9a84c;
  --gold-dim:    #a8873a;
  --text:        #e2eaf3;
  --text-dim:    #8ba5bf;
  --text-muted:  #506070;
  --border:      rgba(0, 229, 204, 0.18);
  --border-sub:  rgba(255, 255, 255, 0.06);
  --radius:      12px;
  --radius-lg:   20px;
  --shadow:      0 4px 32px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 2px 16px rgba(0, 0, 0, 0.4);
  --font:        'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width:   1200px;
  --nav-height:  64px;
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-dim); }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: var(--font); }
input, select, textarea { font-family: var(--font); }

/* ─── Navigation ─── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-height);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.nav-logo .logo-icon { font-size: 1.4rem; }
.nav-logo span { color: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}
.nav-links a {
  color: var(--text-dim);
  font-size: 0.9rem;
  padding: 6px 12px;
  border-radius: 8px;
  transition: background 0.2s, color 0.2s;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--accent);
  background: var(--accent-glow);
}
.nav-cta {
  background: var(--accent);
  color: #0a0e1a !important;
  font-weight: 600;
  border-radius: 8px;
  padding: 8px 16px !important;
}
.nav-cta:hover { background: var(--accent-dim) !important; color: #0a0e1a !important; }
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  padding: 4px 8px;
}

/* ─── Layout ─── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }

/* ─── Typography ─── */
h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; line-height: 1.15; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 700; line-height: 1.25; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }
p { color: var(--text-dim); }
.text-accent { color: var(--accent); }
.text-gold { color: var(--gold); }
.text-dim { color: var(--text-dim); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  transition: all 0.2s;
  cursor: pointer;
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: #0a0e1a;
}
.btn-primary:hover {
  background: var(--accent-dim);
  color: #0a0e1a;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 229, 204, 0.3);
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}
.btn-outline:hover {
  background: var(--accent-glow);
  transform: translateY(-1px);
}
.btn-gold {
  background: var(--gold);
  color: #0a0e1a;
}
.btn-gold:hover {
  background: var(--gold-dim);
  color: #0a0e1a;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(201, 168, 76, 0.3);
}
.btn-lg { padding: 16px 32px; font-size: 1.05rem; }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }
.btn-full { width: 100%; justify-content: center; }

/* ─── Cards ─── */
.card {
  background: var(--card);
  border: 1px solid var(--border-sub);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all 0.2s;
}
.card:hover {
  background: var(--card-hover);
  border-color: var(--border);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

/* ─── Skill Cards ─── */
.skill-card {
  background: var(--card);
  border: 1px solid var(--border-sub);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
}
.skill-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  opacity: 0;
  transition: opacity 0.2s;
}
.skill-card:hover {
  background: var(--card-hover);
  border-color: var(--border);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}
.skill-card:hover::before { opacity: 1; }

.skill-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
.skill-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: var(--accent-glow);
  border: 1px solid var(--border);
  flex-shrink: 0;
}
.skill-price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}
.skill-price.free { color: var(--gold); }

.skill-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.skill-tagline {
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.4;
}

.skill-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}
.badge-category {
  background: rgba(0, 229, 204, 0.1);
  color: var(--accent);
  border: 1px solid rgba(0, 229, 204, 0.2);
}
.badge-verified {
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.2);
}
.badge-free {
  background: rgba(201, 168, 76, 0.1);
  color: var(--gold);
  border: 1px solid rgba(201, 168, 76, 0.2);
}

.skill-stats {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.skill-stat { display: flex; align-items: center; gap: 4px; }
.star { color: #f59e0b; }

.skill-card-actions {
  margin-top: auto;
  display: flex;
  gap: 8px;
}

/* ─── Grid ─── */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.skills-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

/* ─── Badges / Tags ─── */
.tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-sub);
  border-radius: 20px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ─── Section Headers ─── */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header p {
  margin-top: 12px;
  font-size: 1.05rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.section-label {
  display: inline-block;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

/* ─── Forms ─── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
}
.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
}
.form-label span { color: var(--accent); }
.form-input, .form-select, .form-textarea {
  background: rgba(255, 255, 255, 0.05);
  border: 1.5px solid var(--border-sub);
  border-radius: var(--radius);
  color: var(--text);
  padding: 12px 16px;
  font-size: 0.95rem;
  transition: border-color 0.2s, background 0.2s;
  width: 100%;
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); }
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(0, 229, 204, 0.04);
}
.form-select option { background: var(--card); color: var(--text); }
.form-textarea { resize: vertical; min-height: 120px; }
.form-hint { font-size: 0.8rem; color: var(--text-muted); }

/* ─── Stats Bar ─── */
.stats-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  padding: 32px 24px;
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-sub);
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ─── Alert / Notice ─── */
.alert {
  padding: 16px 20px;
  border-radius: var(--radius);
  border-left: 4px solid var(--accent);
  background: var(--accent-glow);
  font-size: 0.9rem;
  color: var(--text-dim);
}
.alert-gold {
  border-color: var(--gold);
  background: rgba(201, 168, 76, 0.08);
}

/* ─── Divider ─── */
.divider {
  height: 1px;
  background: var(--border-sub);
  margin: 32px 0;
}

/* ─── Footer ─── */
.footer {
  background: var(--bg-mid);
  border-top: 1px solid var(--border-sub);
  padding: 48px 0 24px;
  margin-top: 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand p {
  font-size: 0.875rem;
  margin-top: 12px;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--text-muted); font-size: 0.875rem; transition: color 0.2s; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border-sub);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ─── Filter Bar ─── */
.filter-bar {
  background: var(--card);
  border: 1px solid var(--border-sub);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.filter-search {
  position: relative;
}
.filter-search input {
  padding-left: 44px;
}
.filter-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}
.filter-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}
.filter-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.filter-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.chip {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-sub);
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
}
.chip:hover, .chip.active {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent);
}
.chip.active { font-weight: 600; }

/* ─── Steps / How it works ─── */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.step {
  text-align: center;
  position: relative;
}
.step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin: 0 auto 16px;
}
.step h3 { font-size: 1rem; margin-bottom: 8px; }
.step p { font-size: 0.875rem; }

/* ─── Accordion ─── */
.accordion-item {
  border: 1px solid var(--border-sub);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 8px;
}
.accordion-trigger {
  width: 100%;
  background: var(--card);
  border: none;
  padding: 16px 20px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}
.accordion-trigger:hover { background: var(--card-hover); }
.accordion-icon { transition: transform 0.2s; color: var(--accent); }
.accordion-trigger.open .accordion-icon { transform: rotate(180deg); }
.accordion-body {
  display: none;
  padding: 0 20px 16px;
  background: var(--card);
  font-size: 0.9rem;
  color: var(--text-dim);
}
.accordion-body.open { display: block; }

/* ─── Loading / Empty state ─── */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 3rem; margin-bottom: 16px; }
.empty-state h3 { color: var(--text-dim); margin-bottom: 8px; }
.loading { text-align: center; padding: 40px; color: var(--text-muted); }
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-sub);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Code block ─── */
.code-block {
  background: #060910;
  border: 1px solid var(--border-sub);
  border-radius: var(--radius);
  padding: 20px;
  overflow-x: auto;
}
.code-block code {
  font-family: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
  font-size: 0.875rem;
  color: #a8e8d8;
  white-space: pre;
}

/* ─── Breadcrumb ─── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { color: var(--text-muted); }

/* ─── Rating Stars ─── */
.stars {
  display: flex;
  gap: 2px;
}
.stars .star-filled { color: #f59e0b; }
.stars .star-empty { color: var(--border-sub); }

/* ─── Mobile Menu ─── */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: rgba(10, 14, 26, 0.97);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  z-index: 99;
  flex-direction: column;
  gap: 4px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  color: var(--text-dim);
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 500;
  display: block;
}
.mobile-menu a:hover, .mobile-menu a.active { color: var(--accent); background: var(--accent-glow); }

/* ─── Responsive ─── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .section { padding: 48px 0; }
  .nav-links { display: none; }
  .nav-hamburger { display: block; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .stats-bar { gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  h1 { font-size: 1.9rem; }
}
@media (max-width: 480px) {
  .steps { grid-template-columns: 1fr; }
  .skill-card-actions { flex-direction: column; }
  .filter-row { flex-direction: column; align-items: flex-start; }
}