:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --border: #e3e6ea;
  --text: #1f2329;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-d: #1d4ed8;
  --danger: #dc2626;
  --ok: #16a34a;
  --result-bg: #f8fafc;
  --th-bg: #fbfbfc;
  --kbd-bg: #eef2ff;
  --kbd-fg: #3730a3;
}
/* Dark mode: applied via html.dark, toggled in app.js */
html.dark {
  --bg: #0f1115;
  --panel: #181b22;
  --border: #2a2f38;
  --text: #e5e7eb;
  --muted: #9aa3b2;
  --accent: #3b82f6;
  --accent-d: #60a5fa;
  --danger: #f87171;
  --ok: #4ade80;
  --result-bg: #11141a;
  --th-bg: #1c1f27;
  --kbd-bg: #1f2937;
  --kbd-fg: #c7d2fe;
}
html.dark input[type=color],
html.dark canvas { background: #fff; }
html.dark .doc-content { color: #1f2329; }

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14.5px;
  line-height: 1.5;
}
.topbar {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 18px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
  flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 16px; text-decoration: none; color: var(--text); }
.back { color: var(--muted); text-decoration: none; font-size: 13px; }
.back:hover { color: var(--accent-d); }
.spacer { flex: 1; }
input.search {
  width: 320px; padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; background: var(--panel); color: var(--text);
}
button, .btn {
  border: 1px solid var(--border); background: var(--panel); padding: 8px 14px;
  border-radius: 8px; cursor: pointer; font-size: 14px; color: var(--text);
}
button:hover, .btn:hover { background: var(--bg); }
button.primary, .btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover, .btn.primary:hover { background: var(--accent-d); }
button.danger, .btn.danger { color: var(--danger); border-color: var(--danger); background: transparent; }
button.danger:hover, .btn.danger:hover { background: var(--danger); color: #fff; }
button.ghost, .btn.ghost { border-color: transparent; background: transparent; }
input[type=text], input[type=number], input[type=password], input[type=email], input[type=url],
input[type=date], input[type=time], input[type=datetime-local], input[type=search], select, textarea {
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; font-size: 14px; color: var(--text);
  background: var(--panel); font-family: inherit;
}
textarea { width: 100%; min-height: 120px; resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
label { font-size: 13px; color: var(--muted); display: block; margin-bottom: 4px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.col { display: flex; flex-direction: column; gap: 10px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.big { font-size: 60px; font-weight: 700; font-variant-numeric: tabular-nums; }
.huge { font-size: 96px; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -2px; }
.center { text-align: center; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.hidden { display: none !important; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px; box-shadow: 0 1px 2px rgba(0,0,0,0.02);
}

/* --- View toggles in the header --- */
.toggles { display: flex; gap: 6px; flex-wrap: wrap; }
.toggles label {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 10px; border: 1px solid var(--border); border-radius: 999px;
  cursor: pointer; font-size: 12.5px; color: var(--muted); margin-bottom: 0;
  user-select: none; background: var(--panel);
}
.toggles label:hover { border-color: var(--accent); color: var(--text); }
.toggles input[type=checkbox] { accent-color: var(--accent); margin: 0; }
.toggles label.on { background: var(--accent); color: #fff; border-color: var(--accent); }
.toggles label.on:hover { color: #fff; }

/* Landing page */
.hero { padding: 36px 20px 12px; text-align: center; }
.hero h1 { margin: 0 0 6px; font-size: 32px; }
.hero p { margin: 0 0 18px; color: var(--muted); }
.search-wrap { display: flex; justify-content: center; padding: 0 20px 18px; }
.search-wrap input { width: 100%; max-width: 520px; padding: 12px 16px; font-size: 16px; border-radius: 10px; border: 1px solid var(--border); background: var(--panel); color: var(--text); }
.categories { max-width: 1100px; margin: 0 auto; padding: 0 18px 60px; }
.cat-section { margin-bottom: 26px; }
.cat-title { font-size: 14px; font-weight: 600; color: var(--muted); margin: 0 0 10px; padding-left: 4px; }
.tool-grid {
  display: grid; gap: 10px;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}
.tool-card {
  display: block; padding: 12px 14px; background: var(--panel);
  border: 1px solid var(--border); border-radius: 10px;
  text-decoration: none; color: var(--text); transition: all 0.12s ease;
}
.tool-card:hover { border-color: var(--accent); box-shadow: 0 4px 12px rgba(37,99,235,0.08); transform: translateY(-1px); }
.tool-card .name { font-weight: 600; display: flex; align-items: center; gap: 8px; }
.tool-card .desc { font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.tool-icon { font-size: 18px; }
#noResults { text-align: center; color: var(--muted); padding: 40px; display: none; }
.count-line { text-align: center; color: var(--muted); font-size: 13px; margin-bottom: 10px; }

/* Landing-page view toggles (default: both off). Body classes added by app.js. */
html.no-icons .tool-icon { display: none; }
html.no-desc .tool-card .desc { display: none; }

/* Tool pages */
.tool {
  max-width: 720px; margin: 30px auto; padding: 0 16px 60px;
}
.tool h1 { margin: 0 0 4px; font-size: 24px; }
.tool .desc { color: var(--muted); margin: 0 0 18px; font-size: 14px; }
.tool .panel { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 22px; }
.tool .field { margin-bottom: 12px; }
.tool .field input, .tool .field select, .tool .field textarea { width: 100%; }
.tool .result {
  margin-top: 14px; padding: 14px;
  background: var(--result-bg); border-radius: 10px; border: 1px solid var(--border);
  font-family: ui-monospace, monospace; white-space: pre-wrap; word-break: break-word;
  color: var(--text);
}
.tool .actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.kbd { font-family: ui-monospace, monospace; background: var(--kbd-bg); color: var(--kbd-fg); padding: 1px 6px; border-radius: 4px; font-size: 12px; }
.swatch { display: inline-block; width: 28px; height: 28px; border-radius: 6px; border: 1px solid var(--border); vertical-align: middle; }
canvas { border: 1px solid var(--border); border-radius: 8px; max-width: 100%; }
table { border-collapse: collapse; width: 100%; }
th, td { padding: 6px 10px; border-bottom: 1px solid var(--border); text-align: left; font-size: 13px; }
th { background: var(--th-bg); font-weight: 600; color: var(--muted); font-size: 12px; }