:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666;
  --accent: #2d6cdf;
  --border: #e3e3e3;
  --card: #fafafa;
  --radius: 10px;
  --max: 920px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14151a;
    --fg: #e8e8ea;
    --muted: #9a9aa2;
    --accent: #6ea8ff;
    --border: #2a2b32;
    --card: #1c1d24;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* --- Header & Navigation --- */
header.site { border-bottom: 1px solid var(--border); }
header.site .container { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; padding-top: 14px; padding-bottom: 14px; gap: 8px 12px; }
.brand { font-weight: 700; font-size: 1.15rem; color: var(--fg); }
.brand:hover { text-decoration: none; }
nav.site a { margin-left: 16px; color: var(--muted); font-size: .95rem; }
nav.site a:hover { color: var(--fg); }
nav.site a[aria-current="page"] { color: var(--fg); font-weight: 600; }
.menu-toggle {
  display: none; background: none; border: none; font-size: 1.4rem;
  color: var(--fg); cursor: pointer; padding: 4px 8px; min-height: 44px; min-width: 44px;
}
@media (max-width: 600px) {
  .menu-toggle { display: block; }
  nav.site {
    display: none; width: 100%; flex-direction: column; gap: 4px; padding-top: 8px;
  }
  nav.site.open { display: flex; }
  nav.site a { margin-left: 0; padding: 8px 0; }
}

/* --- Main --- */
main { padding: 40px 0 60px; }
h1 { font-size: 1.8rem; margin: 0 0 .4em; }
h2 { font-size: 1.25rem; margin: 1.8em 0 .5em; }
h3 { font-size: 1.05rem; margin: 1.4em 0 .3em; }
p, ul { margin: 0 0 1em; }
.lead { color: var(--muted); font-size: 1.05rem; margin-bottom: 1.6em; }

/* --- Search --- */
.search-bar {
  margin-bottom: 24px;
}
.search-bar input {
  width: 100%; padding: 12px 14px; font-size: 1rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--card); color: var(--fg);
}
.search-bar input::placeholder { color: var(--muted); }
.search-bar input:focus { outline: 2px solid var(--accent); outline-offset: 2px; }

/* --- Homepage tool cards --- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; list-style: none; padding: 0; margin: 0; }
.card { display: block; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; transition: transform .08s ease, border-color .08s ease; height: 150px; box-sizing: border-box; overflow: hidden; }
.card:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--accent); }
.card .t { font-weight: 600; color: var(--fg); }
.card .d { color: var(--muted); font-size: .92rem; margin-top: 4px; display: -webkit-box; -webkit-line-clamp: 5; -webkit-box-orient: vertical; overflow: hidden; }

/* --- Category cards --- */
.cat-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; list-style: none; padding: 0; margin: 0; }
.cat-card { display: block; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; transition: transform .08s ease, border-color .08s ease; }
.cat-card:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--accent); }
.cat-card .t { font-weight: 600; font-size: 1.05rem; color: var(--fg); }
.cat-card .d { color: var(--muted); font-size: .9rem; margin-top: 6px; display: block; }

/* --- Breadcrumbs --- */
.crumb { color: var(--muted); font-size: .9rem; margin-bottom: 10px; }
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--fg); }

/* --- Tool UI --- */
.tool { max-width: 640px; }
.tool pre { white-space: pre-wrap; word-break: break-word; }
.tool select, .tool input { max-width: 100%; }
.tool .output {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1.1rem; letter-spacing: .5px;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; word-break: break-word; overflow-wrap: break-word; min-height: 52px;
}
.row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
input[type="range"] { width: 100%; max-width: 280px; }
button { font: inherit; cursor: pointer; border: 1px solid var(--accent); background: var(--accent); color: #fff; padding: 9px 16px; min-height: 44px; border-radius: 8px; }
button.secondary { background: transparent; color: var(--accent); }
button:disabled { opacity: .7; cursor: default; }
.field { margin: 18px 0; }
.field > label { display: block; font-weight: 600; margin-bottom: 8px; }
.checks { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 4px; }
.check label { font-weight: 400; display: inline-flex; gap: 6px; align-items: center; padding: 10px 6px; cursor: pointer; border-radius: 6px; }
.check label:hover { background: var(--border); }
.check input[type="checkbox"] { width: 18px; height: 18px; min-width: 18px; }

/* --- Shared form controls across tools --- */
textarea, input[type="text"], input[type="number"], input[type="search"], select {
  font: inherit; width: 100%; color: var(--fg); background: var(--bg);
  border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px;
}
textarea { min-height: 140px; resize: vertical; }
select, input[type="number"] { width: auto; }
.row.tight { gap: 8px; }
.status { font-size: .9rem; margin: 8px 0; min-height: 1.2em; }
.status.err { color: #d64a4a; }
.status.ok { color: #3aa757; }

/* --- Stat tiles (word counter) --- */
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; margin-top: 16px; list-style: none; padding: 0; }
.stats > div { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; text-align: center; }
.stats b { display: block; font-size: 1.3rem; }
.stats span { color: var(--muted); font-size: .82rem; }
.meter { height: 8px; border-radius: 99px; background: var(--border); overflow: hidden; margin-top: 8px; }
.meter > i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .15s ease, background .15s ease; }
.meter-label { font-size: .85rem; color: var(--muted); margin-top: 4px; }

/* --- Footer --- */
footer.site { border-top: 1px solid var(--border); padding: 24px 0; color: var(--muted); font-size: .9rem; }
footer.site .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 14px; }
footer.site nav a { color: var(--muted); margin-right: 14px; }
footer.site nav a:hover { color: var(--fg); }
footer.site span { color: var(--muted); }