/* UG Experiments design system. Tokens match Mission Control (app/globals.css,
   Ultimate Gainz brand guideline). Dark is the default; the light palette (crimson
   on parchment) stays available via data-theme="light". Mono uppercase labels,
   flat cards with a hairline border. */

:root {
  /* Violet palette (11 Oct 2026). Dark is the default, light is one click away. */
  --ug-accent: #a78bfa;
  --ug-accent-strong: #c4b5fd;
  --ug-accent-soft: rgba(167, 139, 250, 0.16);
  --ug-on-accent: #150d2e;
  --ug-canvas: #0e0c16;
  --ug-panel: #171424;
  --ug-ink: #f3f1fa;
  --ug-sub: #b4b0c8;
  --ug-faint: #8f8aa8;
  --ug-line: rgba(243, 241, 250, 0.11);
  --ug-chip: rgba(243, 241, 250, 0.07);
  --ug-success: #5fd9a0;
  --ug-success-soft: rgba(95, 217, 160, 0.13);
  --ug-warning: #f2c35c;
  --ug-warning-soft: rgba(242, 195, 92, 0.13);
  --ug-danger: #ff8b84;
  --ug-danger-soft: rgba(255, 139, 132, 0.13);
  --ug-variant-a: #9a98b0;
  --ug-variant-b: #a78bfa;
  --ug-variant-c: #5cc8e6;
  --ug-variant-d: #f0b86e;
  --ug-shadow: 0 1px 0 rgba(255,255,255,0.03) inset, 0 8px 24px rgba(0,0,0,0.25);
  color-scheme: dark;
  --ug-sans: "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --ug-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

/* Light theme, kept for later: set data-theme="light" on <html>. */
:root[data-theme="light"] {
  --ug-accent: #6d3df5;
  --ug-accent-strong: #5a2bdc;
  --ug-accent-soft: #efe9ff;
  --ug-on-accent: #ffffff;
  --ug-canvas: #f5f4fa;
  --ug-panel: #ffffff;
  --ug-ink: #1b1730;
  --ug-sub: #5f5a78;
  --ug-faint: #8a85a3;
  --ug-line: #e5e2f0;
  --ug-chip: #efedf7;
  --ug-success: #12804f;
  --ug-success-soft: #dff5ea;
  --ug-warning: #9a6200;
  --ug-warning-soft: #fbf0d6;
  --ug-danger: #c4332b;
  --ug-danger-soft: #fbe4e2;
  --ug-variant-a: #8a85a3;
  --ug-variant-b: #6d3df5;
  --ug-variant-c: #0e8fb0;
  --ug-variant-d: #c9822a;
  --ug-shadow: 0 1px 2px rgba(27, 23, 48, 0.05), 0 6px 20px rgba(27, 23, 48, 0.05);
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--ug-canvas); color: var(--ug-ink); font-family: var(--ug-sans); font-size: 15px; line-height: 1.5; -webkit-font-smoothing: antialiased; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }

.ug-shell { max-width: 1240px; margin: 0 auto; padding: 32px 28px 80px; }
@media (max-width: 640px) { .ug-shell { padding: 18px 14px 48px; } }

/* Typography */
.ug-eyebrow, .ug-label { font-size: 13px; color: var(--ug-sub); font-weight: 560; letter-spacing: 0; }
.ug-h1 { font-size: 30px; font-weight: 650; letter-spacing: -0.02em; margin: 4px 0 0; }
.ug-h2 { font-size: 18px; font-weight: 620; margin: 0; letter-spacing: -0.01em; }
.ug-sub { color: var(--ug-sub); }
.ug-mono { font-variant-numeric: tabular-nums; font-weight: 600; }
.ug-num { font-variant-numeric: tabular-nums; }
.ug-small { font-size: 13.5px; }

/* Layout */
.ug-header { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 22px; }
.ug-header p { margin: 6px 0 0; color: var(--ug-sub); max-width: 680px; }
.ug-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.ug-grid { display: grid; gap: 18px; }
.ug-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.ug-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.ug-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 960px) { .ug-grid-3, .ug-grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .ug-grid-2, .ug-grid-3, .ug-grid-4 { grid-template-columns: 1fr; } }
.ug-stack { display: flex; flex-direction: column; gap: 20px; }
.ug-spacer { height: 14px; }

/* Cards */
.ug-card { background: var(--ug-panel); border: 1px solid var(--ug-line); border-radius: 18px; box-shadow: var(--ug-shadow); padding: 26px; min-width: 0; }
.ug-card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 14px; }
.ug-card-head p { margin: 6px 0 0; color: var(--ug-sub); font-size: 14px; line-height: 1.5; max-width: 70ch; }
.ug-card.is-accent { border-color: var(--ug-accent); }
.ug-card.is-flush { padding: 0; overflow: hidden; }

/* Buttons */
.ug-btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 40px; padding: 0 18px; border-radius: 999px; border: 1px solid var(--ug-line); background: var(--ug-panel); color: var(--ug-ink); font-weight: 560; font-size: 14px; text-decoration: none; cursor: pointer; text-align: center; white-space: nowrap; transition: border-color .15s, background .15s; }
.ug-btn:hover { border-color: var(--ug-sub); }
.ug-btn:disabled { opacity: .45; cursor: not-allowed; }
.ug-btn-primary { background: linear-gradient(135deg, var(--ug-accent-strong), var(--ug-accent));  border-color: var(--ug-accent); color: var(--ug-on-accent); }
.ug-btn-primary:hover { background: var(--ug-accent-strong); border-color: var(--ug-accent-strong); }
.ug-btn-danger { color: var(--ug-danger); }
.ug-btn-danger:hover { border-color: var(--ug-danger); }
.ug-btn-ghost { background: transparent; border-color: transparent; }
.ug-btn-sm { height: 32px; padding: 0 12px; font-size: 13px; }

/* Badges and chips */
.ug-badge { display: inline-flex; align-items: center; gap: 6px; height: 26px; padding: 0 11px; border-radius: 999px; font-size: 13px; font-weight: 600; background: var(--ug-chip); color: var(--ug-sub); white-space: nowrap; }
.ug-badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.ug-badge.running { background: var(--ug-success-soft); color: var(--ug-success); }
.ug-badge.paused { background: var(--ug-warning-soft); color: var(--ug-warning); }
.ug-badge.stopped { background: var(--ug-chip); color: var(--ug-sub); }
.ug-badge.draft { background: var(--ug-accent-soft); color: var(--ug-accent); }
.ug-badge.plain::before { display: none; }
.ug-chip { display: inline-flex; align-items: center; height: 30px; padding: 0 12px; border-radius: 999px; background: var(--ug-chip); font-size: 13.5px; color: var(--ug-ink); opacity: .92; }
.ug-dot { width: 9px; height: 9px; border-radius: 3px; display: inline-block; flex: none; }

/* Segmented filters */
.ug-seg { display: inline-flex; background: var(--ug-chip); border-radius: 999px; padding: 3px; gap: 2px; flex-wrap: wrap; }
.ug-seg a, .ug-seg button { border: 0; background: transparent; padding: 7px 16px; border-radius: 999px; font-size: 14px; font-weight: 560; color: var(--ug-sub); text-decoration: none; cursor: pointer; }
.ug-seg a.is-active, .ug-seg button.is-active { background: var(--ug-panel); color: var(--ug-ink); box-shadow: 0 1px 2px rgba(0,0,0,.08); }

/* Banners */
.ug-banner { display: flex; gap: 12px; align-items: flex-start; padding: 13px 15px; border-radius: 10px; border: 1px solid var(--ug-line); background: var(--ug-panel); }
.ug-banner strong { display: block; margin-bottom: 2px; }
.ug-banner p { margin: 0; color: var(--ug-sub); font-size: 14px; }
.ug-banner.info { border-color: var(--ug-line); }
.ug-banner.success { background: var(--ug-success-soft); border-color: transparent; }
.ug-banner.success strong { color: var(--ug-success); }
.ug-banner.warning { background: var(--ug-warning-soft); border-color: transparent; }
.ug-banner.warning strong { color: var(--ug-warning); }
.ug-banner.danger { background: var(--ug-danger-soft); border-color: transparent; }
.ug-banner.danger strong { color: var(--ug-danger); }
.ug-banner-icon { width: 8px; height: 8px; margin-top: 6px; border-radius: 50%; background: currentColor; flex: none; }

/* KPI tiles */
.ug-kpi .ug-kpi-value { font-size: 28px; font-weight: 650; letter-spacing: -0.02em; margin-top: 6px; font-variant-numeric: tabular-nums; }
.ug-kpi .ug-kpi-delta { font-size: 13.5px; margin-top: 2px; }
.up { color: var(--ug-success); }
.down { color: var(--ug-danger); }
.flat { color: var(--ug-sub); }

/* Compare bars inside metric cards */
.ug-bars { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.ug-bar-row { display: grid; grid-template-columns: 28px 1fr 84px; gap: 12px; align-items: center; font-size: 14px; font-variant-numeric: tabular-nums; }
.ug-bar-row > :last-child { text-align: right; font-weight: 600; }
.ug-bar-track { height: 12px; border-radius: 5px; background: var(--ug-chip); overflow: hidden; }
.ug-bar-fill { height: 100%; border-radius: 5px; }

/* Tables */
.ug-table-wrap { overflow-x: auto; }
.ug-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.ug-table th { text-align: left; font-size: 13px; color: var(--ug-sub); font-weight: 600; padding: 12px 9px; border-bottom: 1px solid var(--ug-line); white-space: normal; line-height: 1.3; vertical-align: bottom; }
.ug-table td { padding: 15px 9px; border-bottom: 1px solid var(--ug-line); vertical-align: middle; }
.ug-table tr:last-child td { border-bottom: 0; }
.ug-table .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.ug-table tr.sub td { color: var(--ug-sub); font-size: 13.5px; }
.ug-table tr.sub td:first-child { padding-left: 28px; }
.ug-table tbody tr.is-link { cursor: pointer; }
.ug-table tbody tr.is-link:hover td { background: var(--ug-chip); }

/* Funnel */
.ug-funnel-bar { height: 6px; border-radius: 3px; background: var(--ug-chip); margin-top: 5px; overflow: hidden; min-width: 60px; }
.ug-funnel-bar > span { display: block; height: 100%; border-radius: 3px; }

/* Forms */
.ug-field { display: flex; flex-direction: column; gap: 6px; }
.ug-field + .ug-field { margin-top: 14px; }
.ug-input, .ug-select, .ug-textarea { width: 100%; height: 38px; padding: 0 11px; border-radius: 8px; border: 1px solid var(--ug-line); background: var(--ug-panel); outline: none; transition: border-color .15s; }
.ug-textarea { height: auto; min-height: 84px; padding: 10px 11px; resize: vertical; }
.ug-input:focus, .ug-select:focus, .ug-textarea:focus { border-color: var(--ug-accent); }
.ug-help { color: var(--ug-sub); font-size: 13.5px; }
.ug-error { color: var(--ug-danger); font-size: 12.5px; }
.ug-choice { display: grid; gap: 8px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 760px) { .ug-choice { grid-template-columns: 1fr; } }
.ug-choice label { display: block; padding: 12px; border: 1px solid var(--ug-line); border-radius: 10px; cursor: pointer; background: var(--ug-panel); }
.ug-choice label.is-active { border-color: var(--ug-accent); box-shadow: inset 0 0 0 1px var(--ug-accent); }
.ug-choice input { position: absolute; opacity: 0; pointer-events: none; }
.ug-choice b { display: block; font-size: 13.5px; }
.ug-choice span { display: block; color: var(--ug-sub); font-size: 12px; margin-top: 3px; }
.ug-variant-row { display: grid; grid-template-columns: 34px minmax(0, 1fr) 150px 40px; gap: 10px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--ug-line); }
.ug-variant-row:last-child { border-bottom: 0; }
@media (max-width: 640px) { .ug-variant-row { grid-template-columns: 34px 1fr; } }
.ug-key { width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center; font-family: var(--ug-mono); font-weight: 650; color: var(--ug-on-accent); }
.ug-range { width: 100%; accent-color: var(--ug-accent); }
.ug-toggle { display: flex; gap: 10px; align-items: flex-start; cursor: pointer; }
.ug-toggle input { margin-top: 3px; accent-color: var(--ug-accent); width: 16px; height: 16px; }

/* Verdict hero */
.ug-hero { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 18px; align-items: stretch; }
@media (max-width: 900px) { .ug-hero { grid-template-columns: 1fr; } }
.ug-verdict { font-size: 26px; font-weight: 650; letter-spacing: -0.02em; margin: 6px 0 4px; }
.ug-ci { position: relative; height: 34px; margin: 16px 0 6px; }
.ug-ci-axis { position: absolute; left: 0; right: 0; top: 16px; height: 2px; background: var(--ug-chip); }
.ug-ci-zero { position: absolute; top: 4px; width: 1px; height: 26px; background: var(--ug-sub); }
.ug-ci-range { position: absolute; top: 11px; height: 12px; border-radius: 6px; background: var(--ug-accent-soft); border: 1px solid var(--ug-accent); }
.ug-ci-point { position: absolute; top: 9px; width: 16px; height: 16px; margin-left: -8px; border-radius: 50%; background: var(--ug-accent); border: 3px solid var(--ug-panel); }
.ug-gates { display: grid; gap: 8px; }
.ug-gate { display: flex; justify-content: space-between; gap: 10px; font-size: 14.5px; padding: 11px 13px; border-radius: 8px; background: var(--ug-chip); }
.ug-gate.ok b { color: var(--ug-success); }
.ug-gate.no b { color: var(--ug-warning); }

/* Chart */
.ug-chart svg { width: 100%; height: auto; display: block; overflow: visible; }
.ug-legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 13.5px; color: var(--ug-sub); }
.ug-legend span { display: inline-flex; gap: 6px; align-items: center; }

/* Empty states */
.ug-empty { text-align: center; padding: 48px 20px; }
.ug-empty p { color: var(--ug-sub); max-width: 460px; margin: 8px auto 18px; }

/* Suggestions */
.ug-suggestion { display: grid; grid-template-columns: 44px minmax(0, 1fr) auto; gap: 14px; align-items: start; }
@media (max-width: 760px) { .ug-suggestion { grid-template-columns: 1fr; } }
.ug-rank { width: 40px; height: 40px; border-radius: 10px; background: var(--ug-accent-soft); color: var(--ug-accent); display: grid; place-items: center; font-family: var(--ug-mono); font-weight: 700; }
.ug-kv { display: grid; grid-template-columns: 130px minmax(0, 1fr); gap: 8px 16px; font-size: 14.5px; margin-top: 10px; }
.ug-kv dt { color: var(--ug-sub); font-size: 13px; font-weight: 600; padding-top: 1px; }
.ug-kv dd { margin: 0; }
@media (max-width: 640px) { .ug-kv { grid-template-columns: 1fr; } }

.ug-check { display: flex; gap: 10px; align-items: flex-start; padding: 10px 0; border-bottom: 1px solid var(--ug-line); }
.ug-check:last-child { border-bottom: 0; }
.ug-check-mark { width: 20px; height: 20px; border-radius: 6px; display: grid; place-items: center; font-size: 12px; font-weight: 700; flex: none; }
.ug-check-mark.ok { background: var(--ug-success-soft); color: var(--ug-success); }
.ug-check-mark.no { background: var(--ug-warning-soft); color: var(--ug-warning); }

/* Readability pass (11 Oct 2026): calm numbers, colour only when a difference is significant. */
.ug-hero .ug-verdict { margin-top: 10px; }
.ug-muted-lift { color: var(--ug-sub); }
.ug-metric-sub { color: var(--ug-sub); font-size: 14px; margin-top: 4px; line-height: 1.45; }
.ug-key-hint { color: var(--ug-sub); font-size: 13.5px; }
.ug-table td:first-child { white-space: nowrap; }
.ug-table th.num { text-align: right; }

/* Theme toggle */
.ug-theme-toggle { position: fixed; right: 18px; bottom: 18px; z-index: 20; height: 38px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--ug-line); background: var(--ug-panel); color: var(--ug-ink); font-size: 13px; font-weight: 600; cursor: pointer; box-shadow: var(--ug-shadow); }
.ug-theme-toggle:hover { border-color: var(--ug-accent); }

.ug-steps { margin: 12px 0 4px; padding-left: 20px; color: var(--ug-sub); }
.ug-steps li { margin: 6px 0; line-height: 1.5; }
.ug-steps a { color: var(--ug-accent); }
.ug-secret { font-family: var(--ug-mono); font-size: 13px; -webkit-text-security: disc; word-break: break-all; }