:root {
  color-scheme: light dark;
  --bg: #f7f7f5;
  --panel: #ffffff;
  --text: #1c1c1a;
  --text-dim: #5c5c57;
  --border: #ddddd6;
  --accent: #1f6f5c;
  --accent-text: #ffffff;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --fatal: #b3261e;
  --highlight-bg: #fff2a8;
  --highlight-text: #1c1c1a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16171a;
    --panel: #1e2024;
    --text: #eceae4;
    --text-dim: #a3a29c;
    --border: #33353a;
    --accent: #4fb99f;
    --accent-text: #0b1210;
    --fatal: #ff8a80;
    --highlight-bg: #6b5c15;
    --highlight-text: #fff2a8;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
}

.wrap { max-width: 960px; margin: 0 auto; padding-inline: 20px; }

.navbar { border-bottom: 1px solid var(--border); background: var(--panel); }
.navbar .wrap { display: flex; align-items: center; gap: 20px; padding-block: 12px; }
.nav-brand { font-weight: 700; text-decoration: none; color: var(--text); }
.nav-link { text-decoration: none; color: var(--text-dim); }
.nav-link.active, .nav-link:hover { color: var(--text); }

.site-header { padding-block: 32px 8px; }
.site-header h1 { margin: 0 0 8px; font-size: 1.8rem; }
.tagline { color: var(--text-dim); max-width: 64ch; }

main { padding-block: 16px 48px; }

.tool-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.tool-card {
  display: block; padding: 20px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--panel); text-decoration: none; color: var(--text);
}
.tool-card h2 { margin: 0 0 8px; font-size: 1.1rem; }
.tool-card p { margin: 0; color: var(--text-dim); font-size: 0.92rem; }
.tool-card:hover { border-color: var(--accent); }
.tool-card .external-mark { color: var(--text-dim); font-size: 0.85em; font-weight: 400; }

.privacy { color: var(--text-dim); font-size: 0.9rem; }

.field-label { display: block; font-weight: 600; margin-bottom: 6px; }
textarea#edi {
  width: 100%; min-height: 220px; resize: vertical; font-family: var(--mono);
  font-size: 0.85rem; padding: 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--panel); color: var(--text);
}
.hint { color: var(--text-dim); font-size: 0.85rem; }

.controls { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-block: 10px; }
.inline { display: inline-flex; align-items: center; gap: 6px; font-size: 0.9rem; }
.file-pick { position: relative; overflow: hidden; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; cursor: pointer; }
.file-pick input[type=file] { position: absolute; inset: 0; opacity: 0; cursor: pointer; }

button, .button-link {
  font: inherit; padding: 8px 16px; border-radius: 6px; border: 1px solid var(--border);
  background: var(--panel); color: var(--text); cursor: pointer;
  display: inline-block; text-decoration: none; line-height: 1.2;
}
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button.ghost, .button-link.ghost { background: transparent; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.form-error { color: var(--fatal); }

.fatal-list { list-style: none; padding: 0; margin: 8px 0 0; font-size: 0.85rem; color: var(--fatal); }
.fatal-list li { padding: 4px 0; }

.panel { border: 1px solid var(--border); border-radius: 10px; padding: 16px 20px; background: var(--panel); margin-block: 16px; }
.panel h2 { margin-top: 0; font-size: 1.05rem; }

.convention-wrap { margin-block: 16px; }
.ts-id { margin: 0 0 8px; font-size: 0.95rem; font-family: var(--mono); }

.convention-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; overflow-wrap: anywhere; }
.convention-table th, .convention-table td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; vertical-align: top; }
.convention-table th { background: var(--bg); font-weight: 600; }
.convention-table td.mono { font-family: var(--mono); white-space: nowrap; }
.convention-table td.editable { min-width: 8ch; cursor: text; }
.convention-table td.editable:focus { outline: 2px solid var(--accent); outline-offset: -2px; }
.convention-table select.editable-select {
  font: inherit; width: 100%; border: none; background: transparent; color: var(--text);
}
.convention-table-wrap { overflow-x: auto; }

.raw-segment { white-space: pre; }
.raw-segment mark { background: var(--highlight-bg); color: var(--highlight-text); border-radius: 3px; padding: 0 2px; }
.convention-table th.sortable { cursor: pointer; user-select: none; }
.convention-table th.sortable:hover { color: var(--accent); }

.filter-bar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-block: 10px; }
.filter-bar .inline { gap: 4px; }
.filter-bar select, .filter-bar input[type=text] {
  font: inherit; font-size: 0.85rem; padding: 4px 8px; border: 1px solid var(--border);
  border-radius: 6px; background: var(--panel); color: var(--text);
}
.filter-bar input[type=text] { width: 12ch; }
.convention-table tr.loop-group-row td { background: var(--bg); font-weight: 600; font-family: var(--mono); }

.panel details { border-top: 1px solid var(--border); padding-block: 10px; }
.panel details:first-of-type { border-top: none; }
.panel details summary { cursor: pointer; font-weight: 600; font-size: 0.92rem; }
.panel details[open] summary { margin-bottom: 8px; }

.copy-buttons { margin-top: 8px; display: flex; gap: 8px; flex-wrap: wrap; }

.site-footer { padding-block: 24px 40px; color: var(--text-dim); font-size: 0.85rem; border-top: 1px solid var(--border); margin-top: 24px; }
.site-footer nav { margin-bottom: 8px; }