:root {
  --bg: #eef1fb;
  --bg-solid: #f3f5fc;
  --card-bg: rgba(255, 255, 255, 0.72);
  --card-border: rgba(255, 255, 255, 0.6);
  --border: #e2e5f5;
  --text: #171a2b;
  --muted: #5c6178;
  --primary: #6d5bf0;
  --primary-2: #ff5fa2;
  --primary-hover: #5a48e0;
  --tile-bg: #ffffff;
  --tile-border: #e4e6f7;
  --tile-shadow: 0 1px 2px rgba(23, 26, 43, 0.06);
  --shadow-lg: 0 20px 50px -20px rgba(80, 70, 190, 0.35);
  --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.6) inset, 0 20px 45px -25px rgba(50, 40, 130, 0.35);
  --radius: 18px;
  --blob-a: #a78bfa;
  --blob-b: #ff9dc2;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0f1120;
  --bg-solid: #12142400;
  --card-bg: rgba(24, 26, 46, 0.65);
  --card-border: rgba(255, 255, 255, 0.08);
  --border: #2a2d47;
  --text: #edeefb;
  --muted: #9498b8;
  --primary: #8b7bff;
  --primary-2: #ff77b3;
  --primary-hover: #a294ff;
  --tile-bg: #1b1d34;
  --tile-border: #32355a;
  --tile-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
  --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 25px 55px -25px rgba(0, 0, 0, 0.65);
  --blob-a: #4c3aa8;
  --blob-b: #7a2f57;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  position: relative;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

.backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.45;
  animation: float 16s ease-in-out infinite;
}

.blob-a {
  width: 480px;
  height: 480px;
  top: -160px;
  left: -120px;
  background: var(--blob-a);
}

.blob-b {
  width: 420px;
  height: 420px;
  bottom: -140px;
  right: -100px;
  background: var(--blob-b);
  animation-delay: -8s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -20px) scale(1.08); }
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 20px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: "Jost", "Inter", sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.brand-mark {
  display: inline-flex;
  gap: 3px;
}

.brand-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: white;
  font-size: 0.75rem;
  font-weight: 800;
  transform: rotate(-6deg);
  box-shadow: var(--tile-shadow);
}

.brand-tile-alt {
  transform: rotate(5deg);
  margin-top: 5px;
}

.icon-button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: var(--tile-shadow);
}

.icon-button:hover {
  transform: translateY(-1px) scale(1.04);
}

.icon-sun, .icon-moon {
  position: absolute;
  transition: opacity 0.25s ease, transform 0.35s ease;
}

.icon-moon {
  opacity: 0;
  transform: rotate(-60deg) scale(0.6);
}

:root[data-theme="dark"] .icon-sun {
  opacity: 0;
  transform: rotate(60deg) scale(0.6);
}

:root[data-theme="dark"] .icon-moon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

.site-header {
  text-align: center;
  padding: 44px 20px 8px;
}

.site-header h1 {
  margin: 0 0 10px;
  font-family: "Jost", "Inter", sans-serif;
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 2.7rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.accent {
  background: linear-gradient(120deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline {
  margin: 0 auto;
  max-width: 460px;
  color: var(--muted);
  font-size: 1.02rem;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 28px 20px 60px;
  position: relative;
  z-index: 1;
}

.search-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 30px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-card);
  transition: background 0.4s ease, border-color 0.4s ease;
}

.search-card label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 0.92rem;
}

.label-note {
  font-weight: 500;
  color: var(--muted);
  font-size: 0.85rem;
}

.label-note code {
  background: var(--tile-bg);
  border: 1px solid var(--tile-border);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--primary);
}

.input-shell {
  position: relative;
  border-radius: 14px;
  padding: 2px;
  background: linear-gradient(120deg, var(--primary), var(--primary-2));
  box-shadow: 0 0 0 0 rgba(109, 91, 240, 0);
  transition: box-shadow 0.2s ease;
}

.input-shell:focus-within {
  box-shadow: 0 0 0 4px rgba(109, 91, 240, 0.25);
}

#letters {
  width: 100%;
  font-family: inherit;
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: lowercase;
  padding: 14px 16px;
  border: none;
  border-radius: 12px;
  outline: none;
  background: var(--tile-bg);
  color: var(--text);
  display: block;
}

#letters::placeholder {
  color: var(--muted);
  font-weight: 500;
}

.hint {
  margin: 12px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.hint code {
  background: var(--tile-bg);
  border: 1px solid var(--tile-border);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--primary);
}

.link-button {
  margin-top: 18px;
  background: none;
  border: none;
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.link-button:hover {
  color: var(--primary-hover);
}

.chevron {
  transition: transform 0.25s ease;
}

.link-button[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
}

.filters-wrapper {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease;
}

.filters-wrapper.expanded {
  grid-template-rows: 1fr;
}

.filters {
  overflow: hidden;
  min-height: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
}

.filters-wrapper.expanded .filters {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.filter-field label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 5px;
}

.filter-field input,
.filter-field select {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 9px;
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--tile-bg);
  color: var(--text);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.filter-field input:focus,
.filter-field select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(109, 91, 240, 0.15);
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.primary-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(120deg, var(--primary), var(--primary-2));
  color: white;
  border: none;
  padding: 13px 26px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.primary-button:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
}

.primary-button:active {
  transform: translateY(0);
}

.secondary-button {
  background: var(--tile-bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 13px 22px;
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
}

.secondary-button:hover {
  transform: translateY(-2px);
  background: var(--border);
}

.results-section {
  margin-top: 22px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px 30px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-card);
  animation: rise 0.35s ease;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.results-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

#results-count {
  font-weight: 700;
  color: var(--text);
}

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

.length-tab {
  background: var(--tile-bg);
  border: 1px solid var(--tile-border);
  color: var(--text);
  padding: 9px 14px;
  min-height: 38px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease;
}

.length-tab:hover {
  transform: translateY(-1px);
}

.length-tab.active {
  background: linear-gradient(120deg, var(--primary), var(--primary-2));
  border-color: transparent;
  color: white;
}

.length-group {
  margin-bottom: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.length-group:first-child {
  padding-top: 0;
  border-top: none;
}

.length-group h3 {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 0 0 10px;
  font-weight: 700;
}

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

.word-tile {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--tile-bg);
  border: 1px solid var(--tile-border);
  border-radius: 8px;
  padding: 7px 10px 7px 13px;
  font-size: 0.95rem;
  font-weight: 500;
  font-family: inherit;
  color: var(--text);
  cursor: pointer;
  box-shadow: var(--tile-shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.word-tile:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: 0 8px 18px -10px rgba(109, 91, 240, 0.5);
}

.word-tile.copied {
  border-color: var(--primary);
  background: var(--tile-bg);
}

.word-tile-score {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  border-radius: 5px;
  font-size: 0.68rem;
  font-weight: 700;
}

.word-tile-score.tier-high {
  background: linear-gradient(120deg, var(--primary), var(--primary-2));
  color: white;
}

.word-tile-score.tier-mid {
  background: var(--tile-border);
  color: var(--text);
}

.word-tile-score.tier-low {
  background: transparent;
  border: 1px solid var(--tile-border);
  color: var(--muted);
}

.no-results {
  color: var(--muted);
  text-align: center;
}

.score-caption {
  margin: -6px 0 16px;
  font-size: 0.82rem;
  color: var(--muted);
}

.info-card {
  margin-top: 22px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 30px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-card);
}

.info-card h2 {
  margin: 0 0 14px;
  font-family: "Jost", "Inter", sans-serif;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
}

.info-card p {
  color: var(--muted);
  line-height: 1.65;
  margin: 0 0 14px;
}

.info-card code {
  background: var(--tile-bg);
  border: 1px solid var(--tile-border);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--primary);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.info-item {
  background: var(--tile-bg);
  border: 1px solid var(--tile-border);
  border-radius: 14px;
  padding: 18px;
}

.info-item h3 {
  margin: 0 0 8px;
  font-size: 0.95rem;
}

.info-item p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.55;
}

.site-footer {
  text-align: center;
  padding: 20px;
  color: var(--muted);
  font-size: 0.8rem;
  position: relative;
  z-index: 1;
}

.site-footer .disclaimer {
  margin-top: 6px;
  font-size: 0.75rem;
  opacity: 0.75;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 480px) {
  .search-card {
    padding: 22px;
  }

  .actions {
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    justify-content: center;
    width: 100%;
  }
}