/* ── HubDev Brand — Dark Tech Design System ─────────────── */
:root {
  --bg: #000000;
  --bg-alt: #0A0A0A;
  --card: #161616;
  --card-border: #262626;
  --accent: #FFA31A;
  --accent-hover: #FFB347;
  --accent-dim: #E67E00;
  --text: #FFFFFF;
  --text-secondary: #AAAAAA;
  --text-muted: #666666;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

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

img { max-width: 100%; height: auto; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

/* ── Navbar ─────────────────────────────────────────────── */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  padding: 0 28px;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.navbar .logo-img {
  display: block;
  width: auto;
  height: 64px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  display: block;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s ease;
  letter-spacing: 0.02em;
}

.nav-links a:hover { background: var(--card); color: var(--accent); }
.nav-links a.active { background: var(--card); color: var(--accent); }

/* ── Layout ─────────────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 24px 48px;
}

.page-title {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 4px;
  letter-spacing: -0.04em;
}

.page-title .accent { color: var(--accent); }

.page-subtitle {
  color: var(--text-secondary);
  font-size: 13px;
  margin-bottom: 24px;
}

/* ── Grids ──────────────────────────────────────────────── */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

@media (max-width: 600px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

/* ── Stats two-column ──────────────────────────────────── */
.stats-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 16px;
  align-items: stretch;
}

.stats-layout .main-col { min-width: 0; }
.stats-layout .side-col { min-width: 0; }

@media (max-width: 899px) {
  .stats-layout { grid-template-columns: 1fr; }
}

/* ── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
}

/* ── Stat cards ─────────────────────────────────────────── */
.stat-card { text-align: center; padding: 16px 12px; }

.stat-card .stat-value {
  font-size: 30px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.stat-card .stat-label {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

/* ── Section titles ─────────────────────────────────────── */
.section-title {
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.section-title .accent { color: var(--accent); }

/* ── Reviews scroll panel ───────────────────────────────── */
.reviews-panel {
  max-height: 100%;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.reviews-panel::-webkit-scrollbar { width: 4px; }
.reviews-panel::-webkit-scrollbar-track { background: transparent; }
.reviews-panel::-webkit-scrollbar-thumb { background: var(--card-border); border-radius: 4px; }

@media (max-width: 899px) {
  .reviews-panel { max-height: 300px; }
}

.review-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.review-item:last-child { border-bottom: none; }

.review-rating {
  font-size: 12px;
  flex-shrink: 0;
  width: 24px;
  text-align: center;
  line-height: 1.4;
}

.review-body { flex: 1; min-width: 0; }

.review-meta {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.review-meta .author { color: var(--text-secondary); font-weight: 600; }

.review-text {
  font-size: 13px;
  color: var(--text);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.review-text:hover {
  -webkit-line-clamp: unset;
  max-height: none;
  cursor: help;
}

.review-category {
  display: inline-block;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 12px;
  background: rgba(255, 163, 26, 0.1);
  color: var(--accent);
  margin-top: 3px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* ── Toggle buttons ─────────────────────────────────────── */
.period-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.toggle-btn {
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
  letter-spacing: 0.03em;
}

.toggle-btn:hover { background: var(--card); color: var(--accent); border-color: var(--accent); }
.toggle-btn.active { background: var(--accent); color: #000; border-color: var(--accent); }

.period-divider {
  width: 1px;
  height: 20px;
  background: var(--card-border);
  margin: 0 4px;
  flex-shrink: 0;
}

/* ── Chart ──────────────────────────────────────────────── */
.chart-container {
  position: relative;
  width: 100%;
  height: 280px;
}

/* ── Chart controls ─────────────────────────────────────── */
.chart-controls {
  display: flex;
  gap: 4px;
  margin-bottom: 8px;
  justify-content: flex-end;
}

.chart-controls .toggle-btn {
  font-size: 9px;
  padding: 3px 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cat-legend-item.avg-rating-lead {
  border-color: #FFA31A;
  background: rgba(255, 163, 26, 0.08);
}
.cat-legend-item.avg-rating-lead:hover {
  background: rgba(255, 163, 26, 0.18);
}

/* ── Category legend ────────────────────────────────────── */
.cat-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 10px;
}

.cat-legend-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 3px 8px;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--card-border);
  transition: all 0.15s ease;
  font-weight: 600;
}

.cat-legend-item:hover { border-color: var(--accent); }
.cat-legend-item .dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }

/* ── Hero (landing) ─────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 60px 20px 40px;
}

.hero .logo-hero {
  display: block;
  margin: 0 auto 28px;
  width: 320px;
  height: auto;
}

.hero p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto 24px;
  line-height: 1.7;
}

.cta-group { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 14px;
  text-decoration: none;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
  letter-spacing: -0.02em;
}

.btn-primary { background: var(--accent); color: #000; border: 2px solid transparent; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); }

.btn-secondary { background: transparent; color: var(--accent); border: 2px solid var(--accent); }
.btn-secondary:hover { background: rgba(255, 163, 26, 0.1); transform: translateY(-2px); }

/* ── Landing cards ──────────────────────────────────────── */
.landing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 700px;
  margin: 0 auto;
}

.landing-grid .card {
  text-align: center;
  padding: 24px 16px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
}

.landing-grid .card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  transition: all 0.2s ease;
}

@media (max-width: 600px) {
  .landing-grid { grid-template-columns: 1fr; }
}

/* ── Footer ─────────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 11px;
  border-top: 1px solid var(--card-border);
  margin-top: 48px;
  letter-spacing: 0.05em;
}

/* ── Reviews page ─────────────────────────────────────────── */
.reviews-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: start;
}

.reviews-scroll {
  max-height: 600px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.reviews-scroll::-webkit-scrollbar { width: 4px; }
.reviews-scroll::-webkit-scrollbar-track { background: transparent; }
.reviews-scroll::-webkit-scrollbar-thumb { background: var(--card-border); border-radius: 4px; }

.rev-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.rev-item:last-child { border-bottom: none; }

.rev-rating {
  font-size: 12px;
  flex-shrink: 0;
  width: 24px;
  text-align: center;
  line-height: 1.4;
}

.rev-body { flex: 1; min-width: 0; }

.rev-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 3px;
}

.rev-author { color: var(--text-secondary); font-weight: 600; }

.rev-date { color: var(--text-muted); }

.rev-text {
  font-size: 13px;
  color: var(--text);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.rev-text:hover {
  -webkit-line-clamp: unset;
  max-height: none;
  cursor: help;
}

@media (max-width: 700px) {
  .reviews-grid { grid-template-columns: 1fr; }
  .reviews-scroll { max-height: 400px; }
}

/* ── Test page ──────────────────────────────────────────── */
.test-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.test-grid .card {
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

@media (max-width: 600px) {
  .test-grid { grid-template-columns: 1fr; }
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 700px) {
  .navbar { height: 64px; padding: 0 16px; }
  .navbar .logo-img { height: 44px; }
  .nav-links a { padding: 6px 10px; font-size: 12px; }
  .hero .logo-hero { width: 220px; }
  .hero { padding: 40px 14px 28px; }
  .container { padding: 20px 14px 36px; }
  .page-title { font-size: 20px; }
  .chart-container { height: 220px; }
  .toggle-btn { padding: 5px 10px; font-size: 10px; }
}

@media (max-width: 480px) {
  .navbar { height: 56px; padding: 0 12px; }
  .navbar .logo-img { height: 36px; }
  .nav-links a { padding: 4px 8px; font-size: 11px; }
}