/* LocalKit — single stylesheet, no build step */
:root {
  --bg: #f8f9fb;
  --surface: #ffffff;
  --text: #1a202c;
  --muted: #5a6472;
  --border: #e3e7ee;
  --accent: #4f46e5;
  --accent-2: #7c3aed;
  --accent-soft: #eef2ff;
  --ok: #059669;
  --warn: #d97706;
  --err: #dc2626;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(16, 24, 40, .06), 0 1px 2px rgba(16, 24, 40, .04);
  --shadow-lg: 0 12px 32px rgba(16, 24, 40, .10);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1116;
    --surface: #161b23;
    --text: #e6e9ef;
    --muted: #9aa4b2;
    --border: #262d38;
    --accent: #818cf8;
    --accent-2: #a78bfa;
    --accent-soft: #1d2333;
    --shadow: 0 1px 3px rgba(0, 0, 0, .4);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, .5);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header .inner {
  max-width: 1080px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; gap: 24px; height: 60px;
}
.logo {
  font-weight: 800; font-size: 1.15rem; color: var(--text);
  display: flex; align-items: center; gap: 8px; text-decoration: none;
}
.logo:hover { text-decoration: none; }
.logo .mark {
  width: 26px; height: 26px; border-radius: 7px; flex: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-size: 13px; font-weight: 900;
}
.nav { display: flex; gap: 18px; margin-left: auto; font-size: .95rem; }
.nav a { color: var(--muted); }
.nav a:hover, .nav a.active { color: var(--text); text-decoration: none; }

/* Layout */
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 760px; }
main { padding: 40px 0 72px; }

/* Hero */
.hero { text-align: center; padding: 48px 0 40px; }
.hero h1 { font-size: clamp(1.9rem, 4.5vw, 2.9rem); line-height: 1.15; margin: 0 0 14px; letter-spacing: -.02em; }
.hero h1 .grad {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.sub { font-size: 1.1rem; color: var(--muted); max-width: 620px; margin: 0 auto 20px; }
.badge {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--accent-soft); color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  padding: 5px 14px; border-radius: 999px; font-size: .88rem; font-weight: 600;
}

/* Tool grid */
.tool-grid {
  display: grid; gap: 16px; margin-top: 36px;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}
.tool-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow);
  color: var(--text); display: flex; flex-direction: column; gap: 8px;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.tool-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); text-decoration: none; }
.tool-card .icon { font-size: 26px; line-height: 1; }
.tool-card h3 { margin: 4px 0 0; font-size: 1.05rem; }
.tool-card p { margin: 0; color: var(--muted); font-size: .9rem; }

/* Sections */
section.block { margin-top: 48px; }
section.block h2 { font-size: 1.45rem; letter-spacing: -.01em; }
.feature-list { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); padding: 0; margin: 20px 0 0; list-style: none; }
.feature-list li {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; font-size: .95rem; color: var(--muted); box-shadow: var(--shadow);
}
.feature-list li strong { color: var(--text); display: block; margin-bottom: 4px; }

/* Tool page */
.tool-head { margin-bottom: 24px; }
.tool-head h1 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); margin: 10px 0 8px; letter-spacing: -.02em; }
.tool-head .lede { color: var(--muted); font-size: 1.05rem; margin: 0; }
.crumbs { font-size: .88rem; color: var(--muted); }

.panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; margin: 22px 0;
}
.dropzone {
  border: 2px dashed color-mix(in srgb, var(--accent) 45%, var(--border));
  border-radius: var(--radius); background: var(--accent-soft);
  padding: 42px 20px; text-align: center; cursor: pointer; transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.drag { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--accent-soft)); }
.dropzone .big { font-size: 30px; }
.dropzone .title { font-weight: 700; margin: 8px 0 2px; }
.dropzone .hint { color: var(--muted); font-size: .9rem; }

.controls { display: flex; flex-wrap: wrap; gap: 14px 22px; margin: 18px 0; align-items: center; }
.controls label { font-size: .9rem; font-weight: 600; display: flex; flex-direction: column; gap: 6px; }
.controls .inline { flex-direction: row; align-items: center; gap: 8px; }
select, input[type="text"], input[type="number"], input[type="url"], textarea {
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 9px 12px; font-size: .95rem; font-family: inherit;
}
textarea { width: 100%; min-height: 220px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .88rem; resize: vertical; }
input[type="range"] { accent-color: var(--accent); }
button {
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff;
  border: none; border-radius: 9px; padding: 10px 20px; font-size: .95rem; font-weight: 700;
  cursor: pointer; font-family: inherit; display: inline-flex; align-items: center; gap: 8px;
  text-decoration: none; transition: filter .15s;
}
button:hover { filter: brightness(1.08); text-decoration: none; }
button:disabled { opacity: .5; cursor: not-allowed; }
button.ghost {
  background: var(--surface); color: var(--text); border: 1px solid var(--border); font-weight: 600;
}
button.small { padding: 6px 12px; font-size: .85rem; border-radius: 7px; }

/* Language toggle */
.lang-btn { padding: 4px 14px; border-radius: 999px; font-size: .85rem; flex: none; }

/* Sponsor button */
.donate-btn {
  background: linear-gradient(135deg, #e11d48, #f43f5e); color: #fff;
  padding: 5px 14px; border-radius: 999px; font-size: .85rem; font-weight: 700; flex: none;
}
.donate-btn:hover { filter: brightness(1.1); text-decoration: none; color: #fff; }
@media (prefers-color-scheme: dark) { .donate-btn:hover { color: #fff; } }

/* Text diff output */
.diff-out {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .85rem; line-height: 1.5;
  border: 1px solid var(--border); border-radius: 10px;
  overflow: auto; max-height: 480px; background: var(--surface);
}
.diff-line { padding: 1px 14px; white-space: pre-wrap; word-break: break-all; }
.diff-line .sign { display: inline-block; width: 20px; opacity: .7; user-select: none; }
.diff-line.add { background: rgba(16, 185, 129, .13); }
.diff-line.add .sign { color: var(--ok); font-weight: 700; opacity: 1; }
.diff-line.del { background: rgba(220, 38, 38, .11); }
.diff-line.del .sign { color: var(--err); font-weight: 700; opacity: 1; }
.diff-line.ctx { color: var(--muted); }

/* Stat tiles */
.stat-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); margin-top: 18px; }
.stat-grid .cell { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 14px 10px; text-align: center; box-shadow: var(--shadow); }
.stat-grid .cell b { font-size: 1.35rem; display: block; line-height: 1.3; }
.stat-grid .cell span { color: var(--muted); font-size: .82rem; }

/* Chips (case converter etc.) */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.chip {
  background: var(--surface); border: 1px solid var(--border); border-radius: 999px;
  padding: 6px 14px; font-size: .85rem; font-weight: 600; cursor: pointer; color: var(--text);
  font-family: inherit; transition: border-color .15s, background .15s;
}
.chip:hover, .chip.on { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }

.status { margin: 14px 0 0; font-size: .93rem; color: var(--muted); min-height: 1.4em; }
.status.err { color: var(--err); }
.status.ok { color: var(--ok); }

/* Results */
.result-list { display: flex; flex-direction: column; gap: 10px; margin-top: 18px; }
.result-item {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px;
}
.result-item .name { font-weight: 600; font-size: .92rem; word-break: break-all; }
.result-item .meta { color: var(--muted); font-size: .85rem; }
.result-item .spacer { flex: 1; }
.saved { color: var(--ok); font-weight: 700; font-size: .85rem; }

/* Prose */
.prose { font-size: .98rem; color: var(--muted); }
.prose h2 { color: var(--text); font-size: 1.3rem; margin-top: 36px; }
.prose h3 { color: var(--text); font-size: 1.08rem; }
.prose ol li, .prose ul li { margin: 6px 0; }
details {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 16px; margin: 10px 0;
}
details summary { font-weight: 700; cursor: pointer; color: var(--text); }
details p { color: var(--muted); margin: 10px 0 2px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0 40px; margin-top: 40px; }
.site-footer .inner {
  max-width: 1080px; margin: 0 auto; padding: 0 20px;
  display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: center;
  color: var(--muted); font-size: .88rem;
}
.site-footer .links { display: flex; gap: 18px; flex-wrap: wrap; margin-left: auto; }
.site-footer a { color: var(--muted); }

@media (max-width: 640px) {
  .nav { gap: 12px; font-size: .88rem; }
  main { padding-top: 24px; }
  .hero { padding: 28px 0 24px; }
  .panel { padding: 16px; }
}