/* Reset & base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #0d1117;
  --color-surface: #161b22;
  --color-border: #30363d;
  --color-accent: #58a6ff;
  --color-accent-hover: #79b8ff;
  --color-text: #c9d1d9;
  --color-text-muted: #8b949e;
  --color-heading: #f0f6fc;
  --color-tag: #1f6feb;
  --color-tag-text: #58a6ff;
  --radius: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html {
  scroll-behavior: smooth;
  zoom: 1.15;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* Hero / Header */
.hero {
  background: linear-gradient(135deg, #0d1117 0%, #161b22 100%);
  border-bottom: 1px solid var(--color-border);
  padding: 64px 24px 48px;
  text-align: center;
}

.hero-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 3px solid var(--color-border);
  margin-bottom: 20px;
}

.hero h1 {
  color: var(--color-heading);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
}

.hero p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto 24px;
}

.hero-links {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.btn:hover {
  background: var(--color-border);
  color: var(--color-heading);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #0d1117;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #0d1117;
}

/* Nav tabs */
.nav-tabs {
  display: flex;
  gap: 4px;
  justify-content: center;
  padding: 16px 24px 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-tab {
  padding: 10px 20px;
  border-bottom: 2px solid transparent;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.nav-tab:hover {
  color: var(--color-heading);
  text-decoration: none;
}

.nav-tab.active {
  color: var(--color-heading);
  border-bottom-color: var(--color-accent);
}

/* Main layout */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

/* Section */
.section {
  display: none;
}

.section.active {
  display: block;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.section-title {
  color: var(--color-heading);
  font-size: 1.3rem;
  font-weight: 600;
}

.badge {
  display: inline-block;
  background: var(--color-border);
  color: var(--color-text-muted);
  border-radius: 20px;
  padding: 0 8px;
  font-size: 0.78rem;
  font-weight: 600;
  margin-left: 6px;
  vertical-align: middle;
}

/* Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

/* Card */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}

.card-name {
  color: var(--color-accent);
  font-size: 1rem;
  font-weight: 600;
  word-break: break-word;
}

.card-name:hover {
  color: var(--color-accent-hover);
}

.card-description {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  flex: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.card-stat {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.lang-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
  display: inline-block;
}

.tag {
  background: rgba(31, 111, 235, 0.15);
  color: var(--color-tag-text);
  border: 1px solid rgba(88, 166, 255, 0.2);
  border-radius: 20px;
  padding: 2px 10px;
  font-size: 0.75rem;
  font-weight: 500;
}

/* App cards */
.app-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.app-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
}

.app-card-preview {
  background: linear-gradient(135deg, #1c2128 0%, #0d1117 100%);
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  border-bottom: 1px solid var(--color-border);
}

.app-card-body {
  padding: 16px 20px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.app-card-name {
  color: var(--color-heading);
  font-size: 1rem;
  font-weight: 600;
}

.app-card-desc {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  flex: 1;
}

.app-card-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}

/* Loading / empty states */
.loading {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 12px;
}

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

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

/* Footer */
footer {
  border-top: 1px solid var(--color-border);
  text-align: center;
  padding: 24px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

footer a {
  color: var(--color-text-muted);
}

footer a:hover {
  color: var(--color-accent);
}

/* Responsive */
@media (max-width: 600px) {
  .hero h1 { font-size: 1.5rem; }
  .cards-grid { grid-template-columns: 1fr; }
  .nav-tab { padding: 8px 12px; font-size: 0.82rem; }
}