:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #1a1d23;
  --text-muted: #5b6270;
  --border: #e4e7ec;
  --accent: #4f46e5;
  --accent-ink: #ffffff;
  --deleted-bg: #f0fdf4;
  --deleted-border: #bbf7d0;
  --deleted-ink: #15803d;
  --retained-bg: #fffbeb;
  --retained-border: #fde68a;
  --retained-ink: #b45309;
  --callout-bg: #eef2ff;
  --callout-border: #c7d2fe;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a21;
    --text: #e8eaed;
    --text-muted: #9aa1ac;
    --border: #2a2e37;
    --accent: #818cf8;
    --accent-ink: #14161b;
    --deleted-bg: #0f2418;
    --deleted-border: #1e4d33;
    --deleted-ink: #4ade80;
    --retained-bg: #2a2007;
    --retained-border: #5c4a12;
    --retained-ink: #fbbf24;
    --callout-bg: #1a1c2e;
    --callout-border: #33355a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  padding: 18px 0;
}
.site-header .wrap { display: flex; align-items: baseline; gap: 10px; }
.brand { font-weight: 700; font-size: 1.15rem; }
.brand-sub { color: var(--text-muted); font-size: 0.9rem; }

main.wrap { padding: 40px 20px 80px; }

h1 { font-size: 1.9rem; margin: 0 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 1.4rem; margin: 40px 0 12px; letter-spacing: -0.01em; }
h3 { font-size: 1.05rem; margin: 0 0 6px; }

.lede { color: var(--text-muted); font-size: 1.05rem; max-width: 60ch; }

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 28px 0 8px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.toc a { color: var(--accent); text-decoration: none; font-size: 0.92rem; font-weight: 600; }
.toc a:hover { text-decoration: underline; }

p { color: var(--text); }
section p { color: var(--text-muted); }

.steps {
  list-style: none;
  margin: 20px 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.steps li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.step-num {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}
.steps h3 { margin-bottom: 4px; }
.steps p { margin: 0; font-size: 0.95rem; }

.callout {
  margin-top: 20px;
  padding: 14px 18px;
  background: var(--callout-bg);
  border: 1px solid var(--callout-border);
  border-radius: var(--radius);
  font-size: 0.92rem;
  color: var(--text);
}
.callout a { color: var(--accent); font-weight: 600; }

.data-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 20px 0;
}
@media (max-width: 620px) {
  .data-grid { grid-template-columns: 1fr; }
}

.data-card {
  border-radius: var(--radius);
  padding: 18px 20px;
  border: 1px solid;
}
.data-card.deleted {
  background: var(--deleted-bg);
  border-color: var(--deleted-border);
}
.data-card.deleted h3 { color: var(--deleted-ink); }
.data-card.retained {
  background: var(--retained-bg);
  border-color: var(--retained-border);
}
.data-card.retained h3 { color: var(--retained-ink); }

.data-card ul { margin: 8px 0 0; padding-left: 20px; }
.data-card li { margin-bottom: 8px; font-size: 0.93rem; color: var(--text); }
.data-card li:last-child { margin-bottom: 0; }

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

/* ── Interactive delete tool ─────────────────────────────────────────── */
:root {
  --danger: #dc2626;
  --danger-ink: #ffffff;
  --input-bg: var(--surface);
}
@media (prefers-color-scheme: dark) {
  :root { --danger: #ef4444; }
}

.delete-tool {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 22px 24px;
  margin: 20px 0 8px;
}

.tool-progress {
  display: flex;
  gap: 6px;
  margin-bottom: 18px;
}
.tool-progress .dot {
  height: 5px;
  flex: 1;
  border-radius: 3px;
  background: var(--border);
}
.tool-progress .dot.active { background: var(--accent); }
.tool-progress .dot.done { background: var(--accent); opacity: 0.5; }

.tool-error {
  background: var(--retained-bg);
  border: 1px solid var(--retained-border);
  color: var(--retained-ink);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.tool-step label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}
.tool-step input[type="tel"],
.tool-step input[type="text"] {
  width: 100%;
  font-size: 1rem;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  margin-bottom: 14px;
}
.tool-step input:focus {
  outline: none;
  border-color: var(--accent);
}

.step-hint, .step-warning {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin: 0 0 14px;
}
.step-warning { color: var(--retained-ink); }

.check-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 16px;
  cursor: pointer;
}
.check-row input { margin-top: 3px; }

.btn {
  display: inline-block;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  margin-right: 8px;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-danger { background: var(--danger); color: var(--danger-ink); }
.btn-link {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border);
}

.tool-done p { font-size: 1.05rem; color: var(--text); margin: 0; }

.tool-noscript-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}