:root {
  --bg: #1f342f;
  --bg-vignette: #16241f;
  --card: #f7fafd;
  --card-line: #9AC7C9;
  --ink: #18232A;
  --ink-soft: #48556B;
  --accent: #3A8AB2;
  --accent-ink: #D2F6F1;

  --font-display: Georgia, 'Times New Roman', serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(ellipse at top, var(--bg) 0%, var(--bg-vignette) 100%);
  color: var(--ink);
  font-family: var(--font-mono);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: clamp(20px, 5vw, 64px) 18px 48px;
}

.card {
  position: relative;
  width: 100%;
  max-width: 880px;
  background: var(--card);
  border-radius: 4px;
  padding: clamp(28px, 5vw, 52px) clamp(24px, 6vw, 56px) 36px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.4) inset,
    0 30px 60px -20px rgba(0, 0, 0, 0.55),
    0 10px 20px -10px rgba(0, 0, 0, 0.4);
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 34px,
    rgba(107, 93, 72, 0.09) 35px
  );
}

.card-rule {
  height: 3px;
  margin: 24px 0 28px;
  background: var(--accent);
  box-shadow: 0 6px 0 -3.5px rgba(178, 58, 58, 0.35);
}

.card-header {
  position: relative;
}

.eyebrow {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

h1 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(32px, 6vw, 46px);
  line-height: 1.05;
  color: var(--ink);
}

.subtitle {
  margin: 0;
  max-width: 46ch;
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.55;
}

.legend {
  position: relative;
  margin: 26px 0 28px;
  padding: 16px 18px;
  border: 1px solid var(--card-line);
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.28);
}

.legend-grid {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(200px, 1fr));
  gap: 6px 22px;
}

.legend-row {
  display: grid;
  grid-template-columns: 34px 1fr;
  align-items: baseline;
  gap: 8px;
}

.legend-row dt {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
}

.legend-row dd {
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.4;
}

.legend-examples {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--card-line);
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.7;
}

code {
  font-family: var(--font-mono);
  background: rgba(42, 33, 24, 0.08);
  padding: 1px 5px;
  border-radius: 2px;
  color: var(--ink);
  font-size: 0.95em;
}

.search-form {
  display: flex;
  gap: 10px;
  margin-bottom: 30px;
}

#pattern-input {
  flex: 1;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  padding: 13px 14px;
  border: 1.5px solid var(--ink);
  border-radius: 3px;
  background: #ffffff;
  color: var(--ink);
}

#pattern-input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 1px;
}

#pattern-input::placeholder {
  color: #9c8f76;
}

#search-button {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-ink);
  background: var(--accent);
  border: none;
  border-radius: 3px;
  padding: 0 22px;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  box-shadow: 0 2px 0 #26757C;
}

#search-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 3px 0 #26757C;
}

#search-button:active {
  transform: translateY(2px);
  box-shadow: 0 0 0 #26757C;
}

#search-button:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
}

.results {
  min-height: 40px;
}

.results-summary {
  margin: 0 0 14px;
  font-size: 13px;
  color: var(--ink-soft);
  min-height: 1.4em;
}

.results-summary .count {
  color: var(--ink);
  font-weight: 600;
}

.results-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
  gap: 2px 14px;
  animation: fade-in 0.25s ease;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.letter-tab {
  grid-column: 1 / -1;
  display: inline-flex;
  width: fit-content;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 20px;
  padding: 0 6px;
  margin: 14px 0 4px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 11px;
  font-weight: 600;
  border-radius: 2px;
}

.letter-tab:first-child {
  margin-top: 2px;
}

.word-item {
  padding: 3px 0;
  font-size: 14.5px;
  border-bottom: 1px solid rgba(107, 93, 72, 0.15);
}

.empty-state {
  padding: 18px 4px 6px;
  color: var(--ink-soft);
  font-size: 13.5px;
  line-height: 1.6;
}

.card-footer {
  margin-top: 38px;
  padding-top: 16px;
  border-top: 1px solid var(--card-line);
}

.card-footer p {
  margin: 0;
  font-size: 11.5px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.card-footer a {
  color: var(--ink-soft);
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 520px) {
  .legend-grid {
    grid-template-columns: 1fr;
  }
  .search-form {
    flex-direction: column;
  }
  #search-button {
    padding: 13px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}