/* DueDateLab — production styles
   Brand tokens are locked in :root — see README for details. */
:root {
  /* LOCKED brand tokens (brief §2.4) */
  --navy: #1A2E4A;
  --crimson: #EC0D5C;
  --white: #FFFFFF;

  /* Derived support palette */
  --bg: #F7F8FA;
  --surface: #FFFFFF;
  --text: #1A2E4A;
  --text-soft: #5A6B82;
  --border: #E6EAF1;
  --crimson-dark: #C80A4E;
  --crimson-soft: #FDE6EE;
  --success: #1E7F4F;
  --error: #C80A4E;

  --radius-card: 12px;
  --radius-btn: 8px;
  --shadow-card: 0 1px 2px rgba(26,46,74,0.05);

  --font: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica Neue, Arial, sans-serif;

  /* Aliases kept for component rules below. Do not reintroduce as independent tokens. */
  --muted: var(--text-soft);
  --ink: var(--text);
  --pink: var(--crimson);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
@media (min-width: 1024px) { body { font-size: 18px; } }

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

/* Header */
.pl-header { background: var(--navy); height: 56px; display: flex; align-items: center; padding: 0 16px; position: sticky; top: 0; z-index: 20; }
@media (min-width: 1024px) { .pl-header { padding: 0 32px; } }
.pl-logo { font-weight: 800; font-size: 20px; color: #fff; letter-spacing: -0.3px; text-decoration: none; }
.pl-logo .dot { position: relative; }
.pl-logo .dot::after { content: ''; position: absolute; top: 1px; right: -3px; width: 5px; height: 5px; background: var(--crimson); border-radius: 50%; }
.pl-nav { display: none; gap: 28px; margin-left: auto; margin-right: auto; }
@media (min-width: 1024px) { .pl-nav { display: flex; } }
.pl-nav a { color: #fff; text-decoration: none; font-size: 15px; font-weight: 500; padding: 4px 0; border-bottom: 2px solid transparent; }
.pl-nav a.active { border-color: var(--crimson); }
.pl-hamburger { margin-left: auto; width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; background: transparent; border: none; color: #fff; cursor: pointer; }
@media (min-width: 1024px) { .pl-hamburger { display: none; } }

.pl-drawer { background: var(--navy); display: none; }
.pl-drawer.open { display: block; }
.pl-drawer a { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; color: #fff; text-decoration: none; font-size: 17px; font-weight: 600; border-bottom: 1px solid rgba(255,255,255,0.08); border-left: 3px solid transparent; }
.pl-drawer a.active { background: rgba(236,13,92,0.12); border-left-color: var(--crimson); }

/* Page scaffold */
.pl-page { padding: 16px; }
@media (min-width: 1024px) { .pl-page { padding: 32px; max-width: 960px; margin: 0 auto 64px; } }

/* Tool card */
.pl-card { background: var(--surface); border: 1px solid var(--border); border-top: 2px solid var(--navy); border-radius: var(--radius-card); padding: 24px; box-shadow: var(--shadow-card); max-width: 640px; margin: 0 auto; }
@media (min-width: 1024px) { .pl-card { padding: 32px; } }

.pl-h1 { font-size: 28px; font-weight: 700; letter-spacing: -0.5px; margin: 0 0 8px; line-height: 1.2; }
@media (min-width: 1024px) { .pl-h1 { font-size: 36px; } }
.pl-sub { font-size: 16px; color: var(--text-soft); margin: 0 0 24px; }

.pl-field { margin-bottom: 16px; }
.pl-field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.pl-input, select.pl-input, input.pl-input {
  width: 100%; height: 48px;
  border: 1px solid var(--border); border-radius: var(--radius-btn);
  padding: 0 14px; font: inherit; font-size: 16px; color: var(--text);
  background: #fff; outline: none; transition: border-color 150ms, box-shadow 150ms;
}
.pl-input:focus, select.pl-input:focus, input.pl-input:focus { border-color: var(--crimson); box-shadow: 0 0 0 2px rgba(236,13,92,0.2); }
.pl-input.error { border-color: var(--error); }
.pl-row { display: flex; gap: 10px; }
.pl-row > * { flex: 1; }
@media (min-width: 768px) { .pl-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; } }

.pl-radio { display: flex; align-items: center; gap: 10px; font-size: 15px; padding: 6px 0; cursor: pointer; }
.pl-radio input { accent-color: var(--crimson); width: 18px; height: 18px; }

.pl-toggle { display: inline-flex; padding: 3px; background: #F3F5FA; border-radius: 999px; border: 1px solid var(--border); font-size: 13px; font-weight: 600; margin-bottom: 20px; }
.pl-toggle button { padding: 6px 14px; border-radius: 999px; border: none; background: transparent; color: var(--text-soft); cursor: pointer; font: inherit; font-weight: 600; }
.pl-toggle button.active { background: var(--navy); color: #fff; }

.pl-cta { width: 100%; height: 52px; border-radius: var(--radius-btn); background: var(--crimson); color: #fff; font: inherit; font-size: 17px; font-weight: 600; border: none; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 8px; transition: background 150ms; }
.pl-cta:hover { background: var(--crimson-dark); }
.pl-cta:disabled { opacity: 0.8; cursor: wait; }

.pl-err-msg { color: var(--error); font-size: 14px; margin-top: 6px; display: flex; align-items: center; gap: 6px; }
.pl-hint { font-size: 12px; color: var(--muted); margin-top: 6px; line-height: 1.45; }
.pl-mode-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 16px; }
.pl-mode-tabs button { background: #F3F5F9; border: 1.5px solid transparent; border-radius: 10px; padding: 12px 14px; font: 600 14px/1.3 inherit; color: var(--muted); cursor: pointer; text-align: left; transition: all 0.15s; }
.pl-mode-tabs button:hover { background: #E9EEF6; }
.pl-mode-tabs button.active { background: var(--crimson-soft); border-color: var(--crimson); color: var(--text); }
.pl-mode-tabs button .pl-mode-title { display: block; font-weight: 700; font-size: 14px; color: var(--ink); margin-bottom: 2px; }
.pl-mode-tabs button .pl-mode-sub { display: block; font-weight: 500; font-size: 12px; color: var(--muted); }

/* Result */
.pl-result { margin-top: 16px; background: var(--crimson-soft); border-radius: var(--radius-card); border-top: 4px solid var(--crimson); padding: 24px; max-width: 640px; margin-left: auto; margin-right: auto; }
.pl-result-big { font-size: 36px; font-weight: 800; line-height: 1.1; letter-spacing: -0.8px; margin: 0 0 8px; }
@media (min-width: 1024px) { .pl-result-big { font-size: 48px; } }
.pl-result-expl { font-size: 16px; color: var(--text-soft); margin: 0 0 20px; }

.pl-stat-grid { display: grid; gap: 10px; }
.pl-stat-grid.c2 { grid-template-columns: repeat(2, 1fr); }
.pl-stat-grid.c3 { grid-template-columns: repeat(3, 1fr); }
.pl-stat { background: #fff; border-radius: 10px; padding: 14px; text-align: center; }
.pl-stat-num { font-size: 22px; font-weight: 800; color: var(--navy); letter-spacing: -0.3px; line-height: 1.1; }
.pl-stat-label { font-size: 11px; color: var(--crimson); font-weight: 700; text-transform: uppercase; letter-spacing: 1px; margin-top: 4px; }

.pl-share { display: flex; gap: 10px; align-items: center; margin-top: 20px; padding-top: 16px; border-top: 1px solid rgba(26,46,74,0.08); flex-wrap: wrap; }
.pl-share-label { font-size: 14px; color: var(--text-soft); }
.pl-share-btn { width: 40px; height: 40px; border-radius: 8px; background: #fff; border: 1px solid var(--border); color: var(--crimson); display: flex; align-items: center; justify-content: center; cursor: pointer; text-decoration: none; }
.pl-share-btn:hover { border-color: var(--crimson); }
.pl-tryagain { color: var(--navy); font-size: 15px; font-weight: 600; text-decoration: none; margin-left: auto; display: inline-flex; align-items: center; gap: 4px; background: none; border: none; cursor: pointer; font-family: inherit; }

/* Chinese chart */
.pl-chart-scroll { overflow-x: auto; margin-top: 12px; -webkit-overflow-scrolling: touch; }
.pl-chart { border-collapse: separate; border-spacing: 0; width: 100%; font-size: 12px; table-layout: fixed; min-width: 420px; }
.pl-chart th, .pl-chart td { border-bottom: 1px solid var(--border); border-right: 1px solid var(--border); text-align: center; padding: 6px 0; background: #fff; height: 26px; font-weight: 500; }
.pl-chart th:first-child, .pl-chart td:first-child { border-left: 1px solid var(--border); font-weight: 700; background: #F3F5FA; width: 38px; }
.pl-chart thead th { background: var(--navy); color: #fff; font-weight: 600; font-size: 11px; border-bottom-color: var(--navy); border-right-color: rgba(255,255,255,0.12); }
.pl-chart tr.hl td { background: var(--crimson-soft); }
.pl-chart tr.hl td:first-child { background: var(--crimson); color: #fff; }
.pl-chart td.predict { background: var(--crimson) !important; color: #fff; font-weight: 800; font-size: 10px; letter-spacing: 0.5px; }

/* Timeline */
.pl-timeline { background: #fff; border-radius: 10px; padding: 14px; margin-top: 16px; }
.pl-timeline-track { position: relative; height: 8px; background: var(--border); border-radius: 4px; }
.pl-timeline-seg { position: absolute; top: 0; height: 100%; background: var(--navy); }
.pl-timeline-marker { position: absolute; top: -4px; width: 16px; height: 16px; border-radius: 50%; background: var(--crimson); border: 2px solid #fff; box-shadow: 0 1px 4px rgba(236,13,92,0.4); transform: translateX(-50%); }

/* Related */
.pl-related { margin-top: 32px; max-width: 960px; margin-left: auto; margin-right: auto; }
.pl-related-h { font-size: 12px; font-weight: 700; color: var(--text-soft); text-transform: uppercase; letter-spacing: 1px; margin: 0 0 12px; }
.pl-related-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 768px) { .pl-related-grid { grid-template-columns: repeat(3, 1fr); } .pl-related-grid.c4 { grid-template-columns: repeat(4, 1fr); } }
.pl-related-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-card); padding: 16px; text-decoration: none; color: var(--text); display: block; }
.pl-related-card:hover { border-color: var(--navy); box-shadow: 0 2px 12px rgba(26,46,74,0.08); }
.pl-related-title { font-weight: 700; font-size: 15px; margin: 0 0 2px; }
.pl-related-desc { font-size: 13px; color: var(--text-soft); margin: 0; line-height: 1.45; }

/* Ad */
.pl-ad { margin: 24px auto; text-align: center; max-width: 728px; }
.pl-ad-label { font-size: 12px; color: var(--text-soft); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 1px; }
.pl-ad-slot { height: 90px; border: 1px dashed var(--border); background: #FAFBFD; color: var(--text-soft); font-size: 13px; display: flex; align-items: center; justify-content: center; border-radius: 6px; }

/* Printable callout */
.pl-printable { margin: 16px auto 0; background: var(--navy); color: #fff; border-radius: var(--radius-card); padding: 20px 24px; display: flex; align-items: center; gap: 16px; max-width: 640px; flex-wrap: wrap; }
.pl-printable-body { flex: 1; min-width: 180px; }
.pl-printable-title { font-weight: 700; font-size: 16px; margin: 0 0 2px; }
.pl-printable-desc { font-size: 14px; color: rgba(255,255,255,0.75); margin: 0; }
.pl-printable a { color: var(--crimson); font-weight: 600; font-size: 15px; text-decoration: none; white-space: nowrap; }

/* Explainer */
.pl-explain { max-width: 720px; margin: 32px auto 0; }
.pl-explain h2 { font-size: 22px; font-weight: 700; margin: 28px 0 10px; letter-spacing: -0.3px; }
.pl-explain p { margin: 0 0 14px; }
.pl-explain ol, .pl-explain ul { padding-left: 22px; margin: 0 0 14px; }

/* Sources block */
.pl-sources { max-width: 720px; margin: 24px auto 0; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-card); padding: 18px 22px; }
.pl-sources h3 { font-size: 12px; font-weight: 700; color: var(--text-soft); text-transform: uppercase; letter-spacing: 1.5px; margin: 0 0 10px; }
.pl-sources ul { list-style: none; padding: 0; margin: 0; font-size: 14px; }
.pl-sources li { padding: 4px 0; }
.pl-sources a { color: var(--navy); text-decoration: none; border-bottom: 1px solid var(--border); }
.pl-sources a:hover { border-color: var(--crimson); color: var(--crimson); }
.pl-sources .pl-source-note { font-size: 12px; color: var(--text-soft); margin-top: 8px; }

/* Legal/policy page bodies */
.pl-legal { max-width: 720px; margin: 0 auto; background: var(--surface); border: 1px solid var(--border); border-top: 2px solid var(--navy); border-radius: var(--radius-card); padding: 32px; box-shadow: var(--shadow-card); }
.pl-legal h1 { font-size: 32px; font-weight: 700; letter-spacing: -0.5px; margin: 0 0 4px; line-height: 1.2; }
.pl-legal .pl-legal-date { font-size: 13px; color: var(--text-soft); margin: 0 0 24px; }
.pl-legal h2 { font-size: 20px; font-weight: 700; margin: 28px 0 10px; letter-spacing: -0.3px; }
.pl-legal p, .pl-legal li { font-size: 16px; line-height: 1.6; }
.pl-legal ul, .pl-legal ol { padding-left: 22px; }
.pl-legal a { color: var(--navy); }

/* Footer */
.pl-footer { background: var(--navy); color: rgba(255,255,255,0.75); padding: 40px 16px 24px; margin-top: 48px; }
@media (min-width: 1024px) { .pl-footer { padding: 56px 32px 32px; } }
.pl-footer-grid { display: grid; grid-template-columns: 1fr; gap: 32px; max-width: 960px; margin: 0 auto 32px; }
@media (min-width: 1024px) { .pl-footer-grid { grid-template-columns: 2fr 1fr 1fr; gap: 48px; } }
.pl-footer h4 { color: #fff; font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; margin: 0 0 12px; }
.pl-footer a { color: rgba(255,255,255,0.75); text-decoration: none; display: block; padding: 4px 0; font-size: 15px; }
.pl-footer a:hover { color: #fff; }
.pl-footer-note { max-width: 960px; margin: 0 auto; font-size: 12px; color: rgba(255,255,255,0.45); padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); }

/* Cookie banner */
.pl-cookie { position: fixed; bottom: 0; left: 0; right: 0; background: #fff; border-top: 1px solid var(--border); padding: 8px 16px; display: flex; align-items: center; gap: 12px; font-size: 13px; min-height: 48px; z-index: 40; flex-wrap: wrap; }
.pl-cookie.hidden { display: none; }
.pl-cookie-text { flex: 1; min-width: 200px; }
.pl-cookie-btn { padding: 8px 14px; border-radius: 6px; font: inherit; font-weight: 600; font-size: 13px; cursor: pointer; border: 1px solid var(--border); background: #fff; color: var(--text); }
.pl-cookie-btn.accept { background: var(--crimson); color: #fff; border-color: var(--crimson); }

/* Spinner */
.pl-spinner { width: 20px; height: 20px; border-radius: 50%; border: 2.5px solid rgba(255,255,255,0.4); border-top-color: #fff; animation: plspin 0.8s linear infinite; }
@keyframes plspin { to { transform: rotate(360deg); } }

/* Utility */
.hidden { display: none !important; }