/* WordLab — shared stylesheet */
:root {
  --accent: #4f46e5;
  --accent-dark: #4338ca;
  --accent-soft: #eef2ff;
  --text: #1f2430;
  --muted: #5b6472;
  --border: #e5e8ef;
  --bg: #f7f8fb;
  --card: #ffffff;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 8px 24px rgba(16, 24, 40, 0.06);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 12px;
  padding-bottom: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }

.brand-mark { flex: 0 0 auto; display: block; }

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
  margin-left: auto;
}

.site-nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  padding: 7px 11px;
  border-radius: 9px;
}
.site-nav a:hover {
  color: var(--accent);
  background: var(--accent-soft);
  text-decoration: none;
}
.site-nav a.active { color: var(--accent); background: var(--accent-soft); }

.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 9px 10px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  margin: 4px 0;
  border-radius: 2px;
}

/* ---------- Layout / typography ---------- */
main { padding: 28px 0 12px; }

h1 {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 18px 0 6px;
}

.intro {
  color: var(--muted);
  margin: 0 0 22px;
  font-size: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 22px;
}

.card h2 {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 14px;
}

/* ---------- Forms ---------- */
label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
}

input[type="text"],
input[type="number"],
textarea,
select {
  width: 100%;
  font-family: inherit;
  font-size: 15px;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 13px;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

textarea { resize: vertical; min-height: 140px; }

.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-end;
  margin-bottom: 14px;
}
.form-row > div { flex: 1 1 140px; min-width: 120px; }
.form-row .grow { flex: 2 1 220px; }

.btn {
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  padding: 12px 22px;
  cursor: pointer;
  transition: background 0.15s ease;
}
.btn:hover { background: var(--accent-dark); }
.btn:disabled { opacity: 0.55; cursor: default; }

.btn-secondary {
  background: #fff;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-secondary:hover { background: var(--accent-soft); }

/* ---------- Results ---------- */
.results-count {
  font-weight: 700;
  margin: 0 0 14px;
}

.muted { color: var(--muted); }
.error { color: #b42318; }

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

.chip {
  display: inline-flex;
  align-items: center;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-weight: 600;
  font-size: 15px;
  border-radius: 9px;
  padding: 6px 12px;
}

.solution {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
}
.solution:last-child { border-bottom: none; }

.solution-word {
  font-weight: 700;
  font-size: 16px;
  min-width: 120px;
}

.tiles { display: inline-flex; gap: 4px; flex-wrap: wrap; }

.tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 28px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
}
.tile.used { background: var(--accent); color: #fff; }
.tile.left { background: #eef0f5; color: #9aa2b1; }

/* ---------- Stats grid (word counter, jumble) ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}

.stat {
  background: var(--accent-soft);
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.stat .stat-value {
  display: block;
  white-space: nowrap;
  font-size: 20px;
  font-weight: 800;
  color: var(--accent-dark);
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
}
.stat .stat-pct {
  display: inline;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  white-space: nowrap;
}
.stat .stat-label {
  display: block;
  margin-top: 3px;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.3;
  word-break: break-word;
}

/* ---------- Tables ---------- */
.freq-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.freq-table th, .freq-table td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}
.freq-table th {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}
.freq-table .freq-letter {
  font-weight: 800;
  font-size: 16px;
  color: var(--accent-dark);
}
.freq-bar {
  height: 8px;
  background: var(--accent);
  border-radius: 4px;
  min-width: 2px;
}

/* ---------- Word of the day ---------- */
.wotd-word {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent-dark);
  margin: 0;
}
.wotd-pos {
  font-style: italic;
  color: var(--muted);
  margin: 2px 0 16px;
}
.wotd-def { font-size: 18px; margin: 0 0 14px; }
.wotd-example {
  color: var(--muted);
  border-left: 3px solid var(--accent);
  padding-left: 14px;
  margin: 0;
}

/* ---------- Jumble game ---------- */
.jumble-word {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: 0.35em;
  text-align: center;
  color: var(--accent-dark);
  margin: 10px 0 18px;
}

/* ---------- Hub grid ---------- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.tool-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  color: var(--text);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.tool-card:hover {
  text-decoration: none;
  border-color: var(--accent);
  transform: translateY(-2px);
}
.tool-card h2 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--accent-dark);
}
.tool-card p { margin: 0; font-size: 14px; color: var(--muted); }

/* ---------- Ad slots ---------- */
.ad-slot {
  max-height: 100px;
  overflow: hidden;
  min-height: 72px;
  margin: 22px 0;
  border: 1.5px dashed #d3d8e3;
  border-radius: 12px;
  background: #fbfcfe;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ad-slot span {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #9aa2b1;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
  margin-top: 30px;
  padding: 26px 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 18px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-brand strong { display: block; font-size: 15px; }
.footer-brand span { display: block; font-size: 12px; color: var(--muted); }

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 12px;
}
.footer-nav a { font-size: 13px; font-weight: 600; color: var(--muted); }
.footer-nav a:hover { color: var(--accent); }

.copyright {
  width: 100%;
  font-size: 13px;
  color: var(--muted);
  margin: 6px 0 0;
  text-align: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    flex-direction: column;
    padding: 10px 20px 16px;
    margin-left: 0;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px 12px; font-size: 15px; }
}

@media (max-width: 560px) {
  h1 { font-size: 24px; }
  .card { padding: 18px; }
  .jumble-word { font-size: 30px; letter-spacing: 0.25em; }
  .wotd-word { font-size: 32px; }
  .solution-word { min-width: 100%; }
}

/* ---------- Letter Analyzer ---------- */
.btn-row { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.btn-ghost {
  background: #fff;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-ghost:hover { background: var(--accent-soft); }

#unique {
  letter-spacing: 0.05em;
  word-break: break-all;
  line-height: 1.9;
  font-size: 15px;
  color: var(--text);
}
.freq-row {
  display: grid;
  grid-template-columns: 26px 1fr 44px;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.freq-letter {
  font-weight: 700;
  font-size: 15px;
  text-align: center;
  color: var(--ink);
}
.freq-letter.vowel { color: var(--accent-dark); }
.freq-bar-track {
  background: #eef0f5;
  border-radius: 999px;
  height: 12px;
  overflow: hidden;
}
.freq-bar {
  display: block;
  height: 100%;
  background: #b9c0d4;
  border-radius: 999px;
  min-width: 2px;
}
.freq-bar.vowel { background: var(--accent); }
.freq-count {
  text-align: right;
  font-size: 13px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.freq-legend { margin-top: 10px; font-size: 12px; }

/* Two-line wordmark: Wurdler / Wordlab */
.brand .brand-name { display: inline-flex; flex-direction: column; line-height: 1.02; }
.brand .brand-name span { font-size: 13px; font-weight: 600; opacity: 0.85; letter-spacing: 0.03em; }


/* Tools grid on landing */
.tools-section { margin-top: 34px; }
.tools-section h2 { margin-bottom: 4px; }
.tools-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 14px; }
.tool-card { display: block; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; text-decoration: none; color: var(--text); transition: border-color .15s, transform .15s, box-shadow .15s; }
.tool-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,70,229,.12); }
.tool-card h3 { font-size: 15.5px; margin-bottom: 4px; color: var(--accent); }
.tool-card p { font-size: 13.5px; color: var(--muted); line-height: 1.5; }
@media (max-width: 720px) { .tools-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px) { .tools-grid { grid-template-columns: 1fr; } }

/* Guide sections (SEO content) */
.guide-section {
  margin-top: 40px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 32px;
  color: var(--text);
  line-height: 1.65;
  font-size: 15px;
}
.guide-section h2 {
  font-size: 22px;
  font-weight: 800;
  color: var(--accent-dark);
  margin: 0 0 14px;
}
.guide-section h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  margin: 22px 0 8px;
}
.guide-section p {
  margin: 0 0 12px;
}
.guide-section p:last-child {
  margin-bottom: 0;
}
@media (max-width: 640px) {
  .guide-section { padding: 20px; }
}

.footer-trust {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 14px;
  margin-top: 10px;
}
.footer-trust a { font-size: 13px; font-weight: 400; color: var(--muted); }
.footer-trust a:hover { color: var(--accent); }