:root {
  --bg: #0f1419;
  --card: #1a2332;
  --card-hover: #243044;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #2d3a4f;
}

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 80px;
}

header {
  text-align: center;
  margin-bottom: 32px;
  padding-top: 16px;
}

header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

header p { color: var(--muted); font-size: 0.95rem; }

.progress-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-bottom: 28px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #8b5cf6);
  transition: width 0.3s ease;
  border-radius: 2px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  margin-bottom: 20px;
}

.question-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.question-sub {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 14px 18px;
  border-radius: 8px;
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  gap: 12px;
}

.option-btn:hover {
  background: var(--card-hover);
  border-color: var(--accent);
  transform: translateX(4px);
}

.option-btn .num {
  background: var(--accent);
  color: white;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 600;
  flex-shrink: 0;
}

.nav-buttons {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.btn {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
}

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

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover { background: var(--accent-hover); }

.results { display: none; }
.results.active { display: block; }

.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 28px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.product-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0;
  overflow: hidden;
  transition: border-color 0.15s;
  display: flex;
  flex-direction: column;
}

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

.product-thumb {
  background: linear-gradient(145deg, #1e293b, #0f172a);
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.product-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  height: 100%;
}

.product-icon .icon-emoji {
  font-size: 2.4rem;
  line-height: 1;
}

.product-icon .icon-label-text {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.product-img {
  width: 100%;
  height: 120px;
  object-fit: contain;
  padding: 8px;
  background: #0f172a;
}

.product-body {
  padding: 14px 16px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-brand {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.product-name {
  font-weight: 600;
  font-size: 1.05rem;
  margin: 4px 0 8px;
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.tag {
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--card);
  border: 1px solid var(--border);
}

.tag.power { color: #60a5fa; }
.tag.price { color: #34d399; }
.tag.tips {
  color: #a78bfa;
  cursor: pointer;
  font: inherit;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.tag.tips:hover {
  border-color: #a78bfa;
  background: #2a2140;
}
.tag.tips.tip-active {
  background: #5b21b6;
  border-color: #a78bfa;
  color: #f5f3ff;
}
.tag.compat { color: #a78bfa; }
.tag.esd-ok { color: var(--success); border-color: #166534; }
.tag.esd-carefull { color: var(--warning); border-color: #92400e; }
.tag.esd-danger { color: var(--danger); border-color: #991b1b; }

/* Tip compatibility filter */
.product-card.tip-dimmed {
  opacity: 0.28;
  filter: grayscale(0.7);
}
.product-card.tip-dimmed .product-link {
  pointer-events: none;
}
.product-card.tip-match {
  border-color: #a78bfa;
  box-shadow: 0 0 0 1px rgba(167, 139, 250, 0.35);
}
.tip-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: #1e1b2e;
  border: 1px solid #5b21b6;
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 16px;
  font-size: 0.9rem;
  color: var(--muted);
}
.tip-filter-bar strong { color: #c4b5fd; }
.btn-sm {
  padding: 6px 12px;
  font-size: 0.85rem;
}

/* Tip system chip bar — compact */
.tip-chip-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  margin-bottom: 6px;
}
.tip-chip-label {
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 500;
  white-space: nowrap;
}
.tip-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.tip-chip {
  font: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.tip-chip:hover {
  border-color: #a78bfa;
  color: #c4b5fd;
}
.tip-chip.tip-active {
  background: #5b21b6;
  border-color: #a78bfa;
  color: #f5f3ff;
}
/* Special (Joystick) tip filter — distinct so it is easy to find */
.tip-chip.tip-chip-special {
  border-color: #f59e0b;
  color: #fbbf24;
  background: #1c1917;
}
.tip-chip.tip-chip-special:hover {
  border-color: #fbbf24;
  color: #fde68a;
  background: #292524;
}
.tip-chip.tip-chip-special.tip-active {
  background: #b45309;
  border-color: #fbbf24;
  color: #fffbeb;
}

/* Category chips — compact */
.cat-chip-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  margin-bottom: 6px;
}
.cat-chip {
  font: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.cat-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.cat-chip.cat-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.sub-chip-bar,
.power-chip-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  margin-bottom: 6px;
}
.sub-chip,
.power-chip {
  font: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.sub-chip:hover,
.power-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.sub-chip.cat-active,
.power-chip.cat-active {
  background: #0e7490;
  border-color: #22d3ee;
  color: #ecfeff;
}
.product-card.power-dimmed,
.product-card.psu-dimmed,
.product-card.use-dimmed {
  opacity: 0.28;
  filter: grayscale(0.7);
}
.product-card.power-dimmed .product-link,
.product-card.psu-dimmed .product-link,
.product-card.use-dimmed .product-link {
  pointer-events: none;
}
.psu-chip-bar,
.use-chip-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  margin-bottom: 6px;
}
.psu-chip,
.use-chip {
  font: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.psu-chip:hover,
.use-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.psu-chip.cat-active,
.use-chip.cat-active {
  background: #b45309;
  border-color: #fbbf24;
  color: #fffbeb;
}
.cat-chip.cat-disabled,
.tip-chip.cat-disabled,
.sub-chip.cat-disabled,
.use-chip.cat-disabled {
  opacity: 0.35;
  filter: grayscale(0.8);
  cursor: not-allowed;
  pointer-events: none;
}
/* Not sticky — search + breadcrumbs stay fully visible above filters */
.filter-sticky {
  position: relative;
  z-index: 1;
  background: var(--bg, #0f1419);
  padding: 4px 0 2px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
/* Dim inactive secondary bars without removing them (no layout jump) */
.bar-inactive {
  opacity: 0.4;
  pointer-events: none;
}
.result-group {
  margin-bottom: 4px;
}

.product-link {
  display: inline-block;
  background: var(--accent);
  color: white;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: background 0.15s;
}

.product-link:hover { background: var(--accent-hover); }

.empty-msg {
  color: var(--muted);
  font-style: italic;
  padding: 12px 0;
}

.breadcrumb {
  position: sticky;
  top: 48px;
  z-index: 50;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px;
  padding: 6px 0;
  font-size: 0.8rem;
  background: var(--bg);
  border-bottom: 1px solid transparent;
}

.crumb {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 20px;
  color: var(--muted);
  font: inherit;
  line-height: 1.3;
}

.crumb-btn {
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.crumb-btn:hover {
  color: var(--text);
  border-color: var(--accent);
  background: var(--card-hover);
}

.crumb.current {
  color: var(--accent);
  border-color: var(--accent);
  cursor: default;
}

.crumb-sep {
  color: var(--muted);
  opacity: 0.6;
  user-select: none;
}

.restart-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 50px;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  z-index: 100;
  display: none;
}

.restart-btn:hover { border-color: var(--accent); }
.restart-btn.visible { display: block; }

.note {
  background: #1e293b;
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  margin: 16px 0;
  font-size: 0.9rem;
  color: var(--muted);
}

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

.error-box {
  background: #3f1f1f;
  border: 1px solid var(--danger);
  border-radius: 8px;
  padding: 16px;
  color: #fca5a5;
  margin: 20px 0;
}

@media (max-width: 600px) {
  header h1 { font-size: 1.4rem; }
  .product-grid { grid-template-columns: 1fr; }
}

/* Top navigation — always visible above filter menus */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  background: var(--bg);
  box-shadow: 0 1px 0 var(--border);
}

.nav-brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  flex-shrink: 0;
}

.nav-search {
  position: relative;
  flex: 1 1 160px;
  min-width: 140px;
  max-width: 320px;
}

.nav-search input {
  width: 100%;
  padding: 8px 32px 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
}

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

.search-clear {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 4px 6px;
  line-height: 1;
}

.search-clear:hover { color: var(--text); }

.search-go {
  position: absolute;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 0.9rem;
  padding: 4px;
  line-height: 1;
  opacity: 0.7;
}
.search-go:hover { opacity: 1; }

.nav-search input {
  padding-right: 52px;
}

.nav-links {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.nav-link {
  color: var(--muted);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  transition: color 0.15s, background 0.15s;
}

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

.search-hint {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 8px 0 16px;
}

/* About page */
.about-card h2 {
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.about-card h3 {
  font-size: 1.15rem;
  margin: 28px 0 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.about-card p {
  color: var(--muted);
  margin-bottom: 12px;
  line-height: 1.6;
}

.about-card p strong { color: var(--text); }

.about-list {
  color: var(--muted);
  margin: 0 0 16px 1.2rem;
  line-height: 1.6;
}

.about-list li {
  margin-bottom: 8px;
}

.about-list strong { color: var(--text); }

.affiliate-note {
  background: #1e293b;
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  margin: 20px 0 !important;
  font-size: 0.9rem;
}

/* Contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 12px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}

.contact-form input,
.contact-form textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 10px 12px;
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.contact-form .btn {
  align-self: flex-start;
  margin-top: 4px;
}

.contact-status {
  font-size: 0.9rem;
  margin-top: 4px;
}

.contact-status.ok { color: var(--success); }
.contact-status.err { color: var(--danger); }