:root {
  --bg: #f4f6f9;
  --card-bg: #ffffff;
  --text: #1c2530;
  --muted: #5b6673;
  --border: #dde3ea;
  --accent: #003580;
  --accent-2: #0057b8;
  --accent-contrast: #ffffff;
  --chip-bg: #eef2f8;
  --chip-active-bg: #003580;
  --chip-active-text: #ffffff;
  --danger-bg: #fdeeee;
  --danger-text: #8a2b2b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10141a;
    --card-bg: #1a2029;
    --text: #e8ecf1;
    --muted: #9aa5b1;
    --border: #2b3340;
    --accent: #6ea8ff;
    --accent-2: #3d7fe0;
    --accent-contrast: #0b1220;
    --chip-bg: #232b37;
    --chip-active-bg: #6ea8ff;
    --chip-active-text: #0b1220;
    --danger-bg: #2a1a1a;
    --danger-text: #e6a3a3;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  padding: 36px 0 30px;
}

.site-header h1,
.site-header .brand {
  margin: 0;
  font-size: 2rem;
  font-weight: 700;
}

.site-header .brand a {
  color: inherit;
  text-decoration: none;
}

.tagline {
  margin: 6px 0 0;
  opacity: 0.92;
  font-size: 1.05rem;
}

.site-nav {
  margin-top: 14px;
}

.site-nav a {
  color: #fff;
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.5);
  padding-bottom: 2px;
}

.site-nav a:hover {
  border-bottom-color: #fff;
}

main {
  padding: 24px 20px 40px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 24px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.big-label {
  display: block;
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.input-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

#letters {
  flex: 1;
  font-size: 1.4rem;
  letter-spacing: 0.06em;
  padding: 12px 14px;
  border-radius: 10px;
  border: 2px solid var(--border);
  background: var(--bg);
  color: var(--text);
  text-transform: lowercase;
}

#letters:focus {
  outline: none;
  border-color: var(--accent-2);
}

.btn {
  border: none;
  border-radius: 10px;
  padding: 0 18px;
  font-size: 1rem;
  cursor: pointer;
  font-weight: 600;
}

.btn.secondary {
  background: var(--chip-bg);
  color: var(--text);
}

.btn.secondary:hover {
  filter: brightness(0.96);
}

.btn:disabled {
  opacity: 0.7;
  cursor: default;
}

.btn.primary {
  background: var(--accent-2);
  color: #fff;
}

.btn.primary:hover {
  filter: brightness(0.95);
}

.hint {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.filters {
  margin-top: 16px;
}

.filters summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent-2);
}

.filters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.field label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 4px;
}

.field input, .field select {
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
}

.results-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.results-header h2 {
  margin: 0;
  font-size: 1.1rem;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  background: var(--chip-bg);
  color: var(--text);
  border: none;
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 0.85rem;
  cursor: pointer;
}

.chip.active {
  background: var(--chip-active-bg);
  color: var(--chip-active-text);
}

a.chip {
  text-decoration: none;
}

a.chip:hover {
  filter: brightness(0.95);
}

.breadcrumb {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 14px;
}

.breadcrumb a {
  color: var(--accent-2);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.hub-card {
  display: block;
  background: var(--chip-bg);
  border-radius: 10px;
  padding: 16px;
  text-decoration: none;
  color: var(--text);
}

.hub-card:hover {
  filter: brightness(0.97);
}

.hub-card .n {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-2);
}

.hub-card .label {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 2px;
}

.hub-card .count {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 6px;
}

.length-group {
  margin-bottom: 16px;
}

.length-group h3,
.letter-group h2 {
  font-size: 0.95rem;
  color: var(--muted);
  margin: 0 0 8px;
  font-weight: 600;
}

.letter-group {
  margin-bottom: 16px;
  scroll-margin-top: 16px;
}

.word-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.word-pill {
  background: var(--chip-bg);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 0.98rem;
}

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

.info h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.info h3 {
  font-size: 1rem;
}

.info code {
  background: var(--chip-bg);
  padding: 1px 6px;
  border-radius: 5px;
}

.faq h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.faq-item {
  padding: 14px 0;
  border-top: 1px solid var(--border);
}

.faq-item:first-of-type {
  border-top: none;
  padding-top: 4px;
}

.faq-item h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.faq-item p {
  margin: 0;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 22px 0 40px;
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer a {
  color: var(--accent-2);
}

[hidden] {
  display: none !important;
}

.cookie-banner {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  box-shadow: 0 -6px 20px rgba(0,0,0,0.14);
  padding: 16px 20px;
}

.cookie-banner-inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.cookie-banner p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text);
  flex: 1 1 320px;
}

.cookie-banner a {
  color: var(--accent-2);
}

.cookie-banner-actions {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

.footer-links {
  margin-top: 4px;
}

.footer-links a {
  color: var(--accent-2);
}