:root {
  --navy: #0b1b35;
  --navy-light: #142a4f;
  --ink: #0f172a;
  --muted: #5b6577;
  --border: #e3e7ef;
  --bg: #f7f8fb;
  --card: #ffffff;
  --amber: #fef3c7;
  --amber-ink: #78350f;
  --green: #0f7b4e;
  --green-bg: #e7f6ef;
  --red: #b42318;
  --red-bg: #fef3f2;
  --blue: #1d4ed8;
  --blue-bg: #eef2ff;
  --text: #26334a;
  --subtle: #eef0f4;
  --counter-bg: #fafafa;
  --counter-ink: #4a5368;
  --warn-bg: #fff7e6;
  --warn-ink: #b45309;
  --indigo-bg: #eef2ff;
  --indigo-ink: #4338ca;
  --radius: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --navy: #0a1526;
    --navy-light: #1b2f55;
    --ink: #e6ebf5;
    --muted: #96a2bd;
    --border: #2a3346;
    --bg: #0d121e;
    --card: #141a29;
    --amber: rgba(245, 185, 66, 0.16);
    --amber-ink: #f5c86b;
    --green: #34d399;
    --green-bg: rgba(52, 211, 153, 0.14);
    --red: #f87171;
    --red-bg: rgba(248, 113, 113, 0.14);
    --blue: #93c5fd;
    --blue-bg: rgba(147, 197, 253, 0.14);
    --text: #c9d2e3;
    --subtle: #1f2738;
    --counter-bg: #10151f;
    --counter-ink: #aab4c8;
    --warn-bg: rgba(245, 158, 11, 0.15);
    --warn-ink: #fbbf24;
    --indigo-bg: rgba(129, 140, 248, 0.16);
    --indigo-ink: #a5b4fc;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --navy: #0a1526;
  --navy-light: #1b2f55;
  --ink: #e6ebf5;
  --muted: #96a2bd;
  --border: #2a3346;
  --bg: #0d121e;
  --card: #141a29;
  --amber: rgba(245, 185, 66, 0.16);
  --amber-ink: #f5c86b;
  --green: #34d399;
  --green-bg: rgba(52, 211, 153, 0.14);
  --red: #f87171;
  --red-bg: rgba(248, 113, 113, 0.14);
  --blue: #93c5fd;
  --blue-bg: rgba(147, 197, 253, 0.14);
  --text: #c9d2e3;
  --subtle: #1f2738;
  --counter-bg: #10151f;
  --counter-ink: #aab4c8;
  --warn-bg: rgba(245, 158, 11, 0.15);
  --warn-ink: #fbbf24;
  --indigo-bg: rgba(129, 140, 248, 0.16);
  --indigo-ink: #a5b4fc;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--navy);
  color: #e6ebf5;
  display: flex;
  flex-direction: column;
  padding: 20px 16px;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 700;
  padding: 8px 10px 20px;
  color: #fff;
}
.wordmark-icon { color: #f5b942; }

.sidebar nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar nav a {
  color: #b9c4dd;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
}
.sidebar nav a:hover { background: var(--navy-light); color: #fff; }
.sidebar nav a.active { background: var(--navy-light); color: #fff; }

.sidebar-footer {
  margin-top: auto;
  font-size: 11px;
  color: #7f8bab;
  padding: 10px;
  line-height: 1.5;
}

.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--card);
}

.topbar-title {
  font-size: 20px;
  font-weight: 700;
}

.pill {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.pill-amber { background: var(--amber); color: var(--amber-ink); }
.pill-green { background: var(--green-bg); color: var(--green); }
.pill-red { background: var(--red-bg); color: var(--red); }
.pill-blue { background: var(--blue-bg); color: var(--blue); }
.pill-muted { background: var(--subtle); color: var(--muted); }

.content {
  padding: 28px;
  overflow-y: auto;
}

h2 { font-size: 16px; margin: 0 0 12px; }
h3 { font-size: 14px; margin: 0 0 8px; }
p { line-height: 1.55; color: var(--text); }

.lede {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 22px;
  max-width: 760px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 16px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.stat-card .label { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.stat-card .value { font-size: 22px; font-weight: 700; }
.stat-card .interval { font-size: 12px; color: var(--muted); margin-top: 4px; }
.stat-card .insufficient { font-size: 13px; font-weight: 600; color: var(--red); }

.funnel-stage {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.funnel-stage:last-child { border-bottom: none; }
.funnel-stage .stage-name { width: 150px; font-weight: 600; font-size: 13px; flex-shrink: 0; }
.funnel-bar-track { flex: 1; background: var(--subtle); border-radius: 6px; height: 28px; position: relative; overflow: hidden; }
.funnel-bar-fill { background: linear-gradient(90deg, #1d4ed8, #4f7cff); height: 100%; border-radius: 6px; }
.funnel-stage .stage-n { width: 220px; flex-shrink: 0; font-size: 12px; color: var(--muted); text-align: right; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.02em; }
tr:last-child td { border-bottom: none; }
.rank-badge { display: inline-block; width: 22px; height: 22px; border-radius: 50%; background: var(--subtle); text-align: center; line-height: 22px; font-size: 11px; font-weight: 700; color: var(--muted); }

.toggle-row { display: flex; gap: 8px; margin-bottom: 14px; }
.toggle-btn {
  border: 1px solid var(--border);
  background: var(--card);
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: var(--muted);
}
.toggle-btn.active { background: var(--navy-light); color: #fff; border-color: var(--navy-light); }

.decision-card { border-left: 4px solid var(--blue); }
.decision-card .dc-title { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.decision-card .dc-rec { font-size: 14px; margin-bottom: 12px; }
.decision-card .dc-section-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); font-weight: 700; margin: 12px 0 6px; }
.decision-card ul { margin: 0; padding-left: 18px; font-size: 13px; line-height: 1.6; }
.decision-card .dc-counter { font-size: 13px; background: var(--counter-bg); border: 1px dashed var(--border); border-radius: 8px; padding: 10px 12px; color: var(--counter-ink); }
.confidence-tag { font-size: 11px; font-weight: 700; padding: 3px 9px; border-radius: 999px; text-transform: uppercase; }
.confidence-high { background: var(--green-bg); color: var(--green); }
.confidence-medium { background: var(--warn-bg); color: var(--warn-ink); }
.confidence-low { background: var(--subtle); color: var(--muted); }

.too-new-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  background: var(--indigo-bg);
  color: var(--indigo-ink);
  padding: 3px 9px;
  border-radius: 999px;
  margin-left: 8px;
}

.validation-pass { color: var(--green); font-weight: 700; }
.validation-fail { color: var(--red); font-weight: 700; }
.check-row { display: flex; gap: 10px; align-items: flex-start; padding: 10px 0; border-bottom: 1px solid var(--border); }
.check-row:last-child { border-bottom: none; }
.check-icon { font-size: 14px; width: 18px; flex-shrink: 0; }

.about-section { max-width: 760px; }
.about-section ul { line-height: 1.8; }

select {
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  background: var(--card);
  color: var(--ink);
}

footer.disclaimer {
  margin-top: 30px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--muted);
}

/* --- Real-data screens --------------------------------------------------- */
.nav-section { font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; color: #7d8bab; padding: 14px 10px 4px; }
.nav-section:empty { padding: 6px 0; }

.brief { max-width: 920px; }
.brief h1 { font-size: 26px; line-height: 1.25; margin: 4px 0 10px; }
.brief h2 { font-size: 16px; margin: 28px 0 12px; }
.brief-kicker { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 700; }
.hero-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.brief a.hero { display: block; text-decoration: none; color: inherit; margin: 0; transition: border-color 0.15s; }
.hero:hover { border-color: var(--blue); }
.hero-value { font-size: 34px; font-weight: 800; letter-spacing: -0.02em; color: var(--ink); }
.hero-label { font-size: 14px; font-weight: 600; margin: 4px 0 8px; }
.hero-sub { font-size: 12.5px; color: var(--muted); line-height: 1.5; }
.action-list { padding-left: 20px; line-height: 1.6; font-size: 14px; color: var(--text); }
.action-list li { margin-bottom: 10px; }
.plan-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.plan-step { margin: 0; }
.plan-when { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--blue); }
.plan-title { font-weight: 700; margin: 4px 0 6px; }
.plan-step p { font-size: 13px; margin: 0; }

[hidden] { display: none !important; }
.post-draft { max-width: 620px; border-left: 4px solid var(--blue); }
.post-draft p { font-size: 15px; line-height: 1.6; margin: 10px 0; color: var(--ink); }
.chip-row { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font-size: 12px; padding: 4px 9px; border-radius: 999px; background: var(--subtle); color: var(--text); }
.programme-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; margin-bottom: 16px; }
.programme { margin: 0; }
.programme h3 { font-size: 16px; margin: 4px 0 8px; }
.programme p { font-size: 13px; margin: 10px 0; }
.programme .pill { white-space: normal; border-radius: 8px; }
.programme dl { margin: 0; font-size: 12.5px; }
.programme dt { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.03em; margin-top: 8px; }
.programme dd { margin: 2px 0 0; color: var(--text); }
.source-note { font-size: 12px; color: var(--muted); }
.source-note a, .brief a, .card a { color: var(--blue); }
.chart-note { font-size: 12px; color: var(--muted); margin: 6px 0 10px; }
.table-wrap { overflow-x: auto; }

.chart-wrap { width: 100%; overflow-x: auto; }
.chart { width: 100%; min-width: 480px; height: auto; display: block; font-family: inherit; }
.chart .grid { stroke: var(--border); stroke-width: 1; }
.chart .axis { fill: var(--muted); font-size: 11px; }
.chart .label { fill: var(--text); font-size: 12px; }
.chart .value { fill: var(--muted); font-size: 11px; }
.chart .bar { fill: var(--blue); }
.chart .whisker { stroke: var(--ink); stroke-width: 1.5; opacity: 0.55; }
.chart .reference { stroke: var(--muted); stroke-width: 1.5; stroke-dasharray: 4 3; }
.chart .muted .bar { opacity: 0.3; }
.chart .hit { fill: transparent; cursor: default; }
.chart .mark:hover .bar { opacity: 1; filter: brightness(1.1); }
.chart-tip { position: fixed; z-index: 50; display: none; pointer-events: none; background: var(--card); color: var(--ink); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; font-size: 12px; line-height: 1.5; box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18); max-width: 280px; }

.withheld-card { border: 1px dashed var(--border); background: var(--counter-bg); }
.withheld-card ul { margin: 8px 0 0; padding-left: 18px; font-size: 13px; line-height: 1.6; color: var(--text); }

.csv-input { width: 100%; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); color: var(--ink); resize: vertical; }

@media (max-width: 760px) {
  .shell { flex-direction: column; }
  .sidebar {
    width: 100%;
    flex-direction: row;
    align-items: center;
    padding: 12px 14px;
    gap: 14px;
    overflow-x: auto;
  }
  .wordmark { padding: 0; flex-shrink: 0; }
  .sidebar nav { flex-direction: row; flex-shrink: 0; }
  .sidebar nav a { white-space: nowrap; }
  .sidebar-footer { display: none; }
  .topbar { flex-wrap: wrap; gap: 10px; padding: 14px 16px; }
  .content { padding: 16px; }
  .nav-section { display: none; }
  .brief h1 { font-size: 21px; }
  .hero-value { font-size: 28px; }
  .funnel-stage { flex-wrap: wrap; }
  .funnel-stage .stage-name { width: 100%; }
  .funnel-stage .stage-n { width: 100%; text-align: left; }
  table { display: block; overflow-x: auto; white-space: nowrap; }
}