:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --text: #1c1c1a;
  --muted: #6b6b66;
  --border: #e4e4df;
  --accent: #3a5bd9;
  --on-accent: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --surface: #1f1f1e;
    --text: #ededea;
    --muted: #9a9a94;
    --border: #2e2e2c;
    --accent: #7b94f0;
    --on-accent: #0f1530;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

a { color: var(--accent); }

h1 { margin: 0 0 4px; font-size: 28px; }
h2 { margin: 32px 0 12px; font-size: 18px; color: var(--muted); font-weight: 600; }

.lead { margin: 0; color: var(--muted); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.card {
  display: block;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: inherit;
  text-decoration: none;
}

.card:hover { border-color: var(--accent); }
.card strong { display: block; }
.card span { color: var(--muted); font-size: 14px; }

.back { display: inline-block; margin-bottom: 24px; font-size: 14px; }
.placeholder { margin-top: 24px; color: var(--muted); }

/* Tool UI */
.panel {
  margin-top: 24px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.row + .row { margin-top: 12px; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

button:hover { border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }

input, select, textarea {
  padding: 8px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-width: 0;
}

input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

label { display: inline-flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--muted); }

.display {
  font: 600 clamp(44px, 14vw, 88px)/1.1 ui-monospace, SFMono-Regular, Menlo, monospace;
  font-variant-numeric: tabular-nums;
  text-align: center;
  margin: 8px 0 20px;
}

.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); font-size: 14px; }

table { width: 100%; border-collapse: collapse; margin-top: 16px; }
th, td { padding: 6px 8px; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; font-size: 14px; }

.list { display: grid; gap: 10px; margin-top: 16px; }
.item {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 12px 14px; border: 1px solid var(--border); border-radius: 10px;
}
.item .big { font-size: 22px; font-weight: 600; }
.icon-btn { padding: 4px 10px; color: var(--muted); }

.card.soon { opacity: 0.55; }
.card.soon strong::after { content: " · soon"; font-weight: 400; font-size: 13px; color: var(--muted); }
.item > .row { flex-wrap: nowrap; flex-shrink: 0; }
@media (max-width: 480px) { .item .big { font-size: 17px; } .item { padding: 10px 12px; } }
@media (max-width: 480px) {
  .item.stack { flex-wrap: wrap; }
  .item.stack > .row { width: 100%; justify-content: space-between; }
}

/* Home: large section cards */
.grid-large { grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 24px; }
@media (max-width: 900px) { .grid-large { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-large { grid-template-columns: 1fr; } }
.card-large { padding: 28px; border-radius: 14px; }
.card-large .card-emoji { display: block; font-size: 44px; line-height: 1; margin-bottom: 14px; color: inherit; }
.card-large strong { font-size: 22px; margin-bottom: 6px; }
.card-large span { font-size: 15px; }
.card-large .card-meta { display: block; margin-top: 14px; font-size: 13px; }

/* Home: tool search */
.search { position: relative; margin-top: 24px; }
.search input {
  width: 100%; padding: 14px 44px 14px 16px; font-size: 17px;
  background: var(--surface); border-radius: 12px;
}
.search-hint {
  position: absolute; right: 12px; top: 13px;
  padding: 1px 8px; border: 1px solid var(--border); border-radius: 6px;
  color: var(--muted); font: 13px/1.5 ui-monospace, Menlo, monospace; pointer-events: none;
}
.search input:focus + .search-hint, .search input:not(:placeholder-shown) + .search-hint { display: none; }
.search-results {
  position: absolute; z-index: 10; left: 0; right: 0; top: calc(100% + 6px);
  margin: 0; padding: 6px; list-style: none;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
  max-height: min(60vh, 480px); overflow-y: auto;
}
.search-result a {
  display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: center;
  padding: 10px 12px; border-radius: 8px; color: inherit; text-decoration: none;
}
.search-result.active a { background: var(--bg); outline: 1px solid var(--accent); }
.search-result.soon { opacity: 0.6; }
.search-emoji { font-size: 22px; }
.search-text { min-width: 0; }
.search-text strong { display: block; }
.search-text span { display: block; color: var(--muted); font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.search-meta { color: var(--muted); font-size: 13px; white-space: nowrap; }
.search-empty { padding: 12px; color: var(--muted); }
@media (max-width: 480px) {
  .search-result a { grid-template-columns: auto 1fr; }
  .search-meta { grid-column: 2; }
}

/* Site footer */
.site-footer {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 16px;
  width: calc(100% - 32px); max-width: 928px; margin: 0 auto; padding: 20px 0 32px;
  border-top: 1px solid var(--border);
  color: var(--muted); font-size: 14px;
}
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--accent); }