/* ———————————————————————————— tokens */
:root {
  --bg: #F3EEE2;
  --bg-deep: #EBE5D4;
  --surface: #FDFCF8;
  --surface-2: #F9F5EA;
  --ink: #14110B;
  --ink-2: #4A4639;
  --ink-3: #86806E;
  --line: #DBD3BD;
  --line-strong: #B8AE92;
  --accent: #C2410C;
  --accent-ink: #7C2D12;
  --positive: #1B5E20;
  --negative: #991B1B;
  --caution: #92400E;
  --grid: rgba(20,17,11,.06);

  --serif: "Fraunces", "Times New Roman", serif;
  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;

  --radius: 6px;
  --radius-lg: 12px;

  --shadow-sm: 0 1px 0 rgba(20,17,11,.04);
  --shadow-md: 0 8px 24px -12px rgba(20,17,11,.18), 0 1px 0 rgba(20,17,11,.04);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

.grain {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 100;
  opacity: .35;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.1  0 0 0 0 0.07  0 0 0 0 0.04  0 0 0 0.35 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

button { font: inherit; color: inherit; cursor: pointer; border: none; background: none; }

/* ———————————————————————————— topbar */
.topbar {
  display: grid;
  grid-template-columns: 260px 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 16px 28px;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 12px; }
.mark { color: var(--ink); display: grid; place-items: center; }
.brand-word { display: flex; flex-direction: column; line-height: 1; }
.brand-name {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 24px;
  font-variation-settings: "opsz" 144, "SOFT" 50;
  letter-spacing: -0.01em;
}
.brand-sub {
  font-size: 10.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-top: 3px;
}

.nav { display: flex; gap: 2px; }
.nav a {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-2);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: var(--radius);
  transition: color .15s, background .15s;
}
.nav a:hover { color: var(--ink); background: var(--surface-2); }
.nav a.active {
  color: var(--ink);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--line);
}

.top-actions { display: flex; gap: 10px; align-items: center; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-2);
}
.chip .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--positive);
  box-shadow: 0 0 0 3px rgba(27,94,32,.15);
}

.btn-primary {
  background: var(--ink);
  color: var(--bg);
  padding: 9px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.005em;
  display: inline-flex; align-items: center; gap: 8px;
  transition: transform .05s, background .15s;
}
.btn-primary:hover { background: #000; }
.btn-primary:active { transform: translateY(1px); }
.btn-primary .plus { font-family: var(--serif); font-size: 16px; line-height: 0; }

.btn-ghost {
  padding: 9px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--ink-2);
}
.btn-ghost:hover { color: var(--ink); }

.icon-btn {
  width: 28px; height: 28px;
  border-radius: var(--radius);
  display: grid; place-items: center;
  color: var(--ink-3);
}
.icon-btn:hover { background: var(--surface-2); color: var(--ink); }

/* ———————————————————————————— shell */
.shell {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: calc(100vh - 66px);
}

/* ———————————————————————————— sidebar */
.sidebar {
  border-right: 1px solid var(--line);
  padding: 18px 16px 16px;
  display: flex; flex-direction: column;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  position: sticky; top: 66px;
  height: calc(100vh - 66px);
  overflow-y: auto;
}
.sidebar-section { margin-bottom: 22px; }
.sidebar-head {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 4px 6px 10px;
}
.sidebar-head .label {
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.sidebar-head .count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
}
.sidebar-head .sort {
  font-size: 10.5px;
  color: var(--ink-3);
  font-style: italic;
}

.pill-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px; }
.pill {
  font-size: 12px;
  padding: 5px 10px;
  border-radius: 999px;
  color: var(--ink-2);
  border: 1px solid transparent;
  transition: all .12s;
}
.pill:hover { background: var(--surface); border-color: var(--line); }
.pill.active {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

.exp-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.exp-item {
  text-align: left;
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  border: 1px solid transparent;
  transition: background .12s, border-color .12s;
}
.exp-item:hover { background: var(--surface); }
.exp-item.active {
  background: var(--surface);
  border-color: var(--line);
  box-shadow: var(--shadow-sm);
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--ink-3);
  margin-top: 5px;
}
.status-dot.running { background: var(--positive); box-shadow: 0 0 0 3px rgba(27,94,32,.15); }
.status-dot.readout { background: var(--caution); box-shadow: 0 0 0 3px rgba(146,64,14,.15); }
.status-dot.shipped { background: #0369A1; box-shadow: 0 0 0 3px rgba(3,105,161,.15); }
.status-dot.archived { background: var(--ink-3); }
.exp-name {
  font-size: 13px;
  color: var(--ink);
  line-height: 1.3;
  letter-spacing: -0.005em;
}
.exp-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
  margin-top: 2px;
}
.exp-delta {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
}
.exp-delta.pos { color: var(--positive); }
.exp-delta.neg { color: var(--negative); }
.exp-delta.neu { color: var(--ink-3); }

.sidebar-foot {
  margin-top: auto;
  padding: 12px 6px 4px;
  border-top: 1px dashed var(--line);
  display: flex; align-items: center; gap: 6px;
  font-size: 11px; color: var(--ink-3);
}
.kbd {
  font-family: var(--mono);
  font-size: 10px;
  padding: 2px 5px;
  border-radius: 3px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink-2);
}
.foot-text { margin-left: 4px; }

/* ———————————————————————————— main detail */
.main {
  padding: 0;
  min-width: 0;
  background:
    linear-gradient(180deg, var(--bg) 0%, var(--bg) 100%),
    repeating-linear-gradient(90deg, transparent 0, transparent 79px, var(--grid) 79px, var(--grid) 80px);
}

.detail-head {
  padding: 28px 36px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.crumb {
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 10px;
}
.crumb .slash { margin: 0 8px; opacity: .5; }
.title-row {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 24px;
}
.detail-title {
  font-family: var(--serif);
  font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 40;
  font-size: 38px;
  line-height: 1.08;
  letter-spacing: -0.022em;
  margin: 0;
  color: var(--ink);
}
.detail-title em {
  font-style: italic;
  font-variation-settings: "opsz" 144, "SOFT" 50, "WONK" 1;
  color: var(--accent-ink);
}

.hypothesis {
  margin-top: 14px;
  max-width: 720px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 300;
  font-style: italic;
  color: var(--ink-2);
  line-height: 1.45;
  border-left: 2px solid var(--accent);
  padding-left: 14px;
}

.status-line {
  display: flex; flex-wrap: wrap; gap: 18px 24px;
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-2);
}
.status-line > div { display: flex; align-items: center; gap: 8px; }
.status-line .lbl { color: var(--ink-3); text-transform: uppercase; letter-spacing: .1em; font-size: 10.5px; }
.status-line .val { color: var(--ink); }

.detail-actions { display: flex; gap: 8px; }

/* ———————————————————————————— verdict banner */
.verdict {
  margin: 24px 36px 0;
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 22px;
  align-items: center;
  box-shadow: var(--shadow-sm);
}
.verdict-tag {
  font-family: var(--serif);
  font-size: 14px;
  padding: 6px 12px;
  border-radius: 999px;
  letter-spacing: .02em;
  font-style: italic;
  border: 1px solid currentColor;
}
.verdict.positive .verdict-tag { color: var(--positive); background: #F0F6F0; }
.verdict.negative .verdict-tag { color: var(--negative); background: #FBF2F2; }
.verdict.neutral  .verdict-tag { color: var(--ink-2); background: var(--surface-2); }
.verdict.readout  .verdict-tag { color: var(--caution); background: #FBF4E8; }

.verdict-text {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 300;
  line-height: 1.4;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.verdict-text strong {
  font-weight: 500;
  font-variation-settings: "opsz" 144;
}
.verdict-text .mono {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--surface-2);
  padding: 1px 6px;
  border-radius: 3px;
}

.verdict-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  text-align: right;
}

/* ———————————————————————————— metric hero */
.metric-hero {
  margin: 24px 36px 0;
  padding: 22px 24px 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.metric-hero-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}
.metric-hero-label {
  font-size: 10.5px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.metric-hero-name {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 400;
  letter-spacing: -0.01em;
  margin: 4px 0 0;
  font-variation-settings: "opsz" 144;
}
.metric-hero-name .var {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-3);
  font-style: normal;
  margin-left: 8px;
}

.metric-hero-values {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 24px;
  align-items: flex-end;
  padding-bottom: 16px;
}
.val-block .v-label {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .2em;
  color: var(--ink-3);
  margin-bottom: 6px;
}
.val-block .v-main {
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variation-settings: "opsz" 144;
}
.val-block .v-main.mono { font-family: var(--mono); font-weight: 400; }
.val-block .v-sub {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
  margin-top: 4px;
}

.delta-block {
  text-align: right;
  padding-left: 24px;
  border-left: 1px solid var(--line);
}
.delta-block .d-label {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .2em;
  color: var(--ink-3);
  margin-bottom: 6px;
}
.delta-block .d-main {
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variation-settings: "opsz" 144;
}
.delta-block .d-main.pos { color: var(--positive); }
.delta-block .d-main.neg { color: var(--negative); }
.delta-block .d-sub {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
  margin-top: 4px;
}

.metric-hero-chart {
  position: relative;
  height: 180px;
  margin: 0 -6px;
}
.chart-axis {
  position: absolute; right: 6px; top: 6px;
  display: flex; gap: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
}
.chart-axis .leg {
  display: inline-flex; align-items: center; gap: 6px;
}
.chart-axis .sw {
  width: 14px; height: 2px; display: inline-block;
}
.chart-axis .sw.ctrl { background: var(--ink-3); }
.chart-axis .sw.treat { background: var(--accent); }

/* ———————————————————————————— grid of panels */
.panels {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 20px;
  padding: 20px 36px 32px;
}
@media (max-width: 1100px) {
  .panels { grid-template-columns: 1fr; }
}
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.panel-head {
  padding: 16px 22px 10px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}
.panel-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 18px;
  letter-spacing: -0.005em;
  margin: 0;
}
.panel-sub {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
}

/* variants */
.variants {
  padding: 18px 22px;
  display: flex; flex-direction: column; gap: 18px;
}
.variant {
  display: grid;
  grid-template-columns: 14px 1fr auto;
  gap: 14px;
  align-items: center;
}
.variant .swatch {
  width: 14px; height: 14px; border-radius: 3px;
  border: 1px solid var(--line-strong);
}
.variant.control .swatch { background: transparent; background-image: repeating-linear-gradient(45deg, var(--ink-3) 0, var(--ink-3) 1px, transparent 1px, transparent 4px); }
.variant.treatment .swatch { background: var(--accent); border-color: var(--accent); }
.v-head {
  display: flex; align-items: baseline; gap: 10px;
}
.v-name {
  font-family: var(--serif);
  font-size: 16px;
}
.v-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--ink-3);
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 3px;
}
.v-desc {
  font-size: 12.5px;
  color: var(--ink-2);
  margin-top: 2px;
}
.v-num {
  text-align: right;
  font-family: var(--mono);
}
.v-num .n { font-size: 15px; color: var(--ink); }
.v-num .pct { font-size: 11px; color: var(--ink-3); }

/* secondary metrics table */
.metrics-table {
  padding: 4px 6px 8px;
}
.mt-row {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px dashed var(--line);
}
.mt-row.head {
  border-bottom: 1px solid var(--line);
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 10px; padding-bottom: 10px;
}
.mt-row:last-child { border-bottom: none; }
.mt-row:hover:not(.head) { background: var(--surface-2); }
.mt-metric {
  font-family: var(--serif);
  font-size: 15px;
}
.mt-metric .tier {
  display: inline-block;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-left: 6px;
  padding: 1px 5px;
  border: 1px solid var(--line);
  border-radius: 3px;
  vertical-align: 2px;
}
.mt-val {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
}
.mt-delta {
  font-family: var(--mono);
  font-size: 13px;
}
.mt-delta.pos { color: var(--positive); }
.mt-delta.neg { color: var(--negative); }
.mt-delta.neu { color: var(--ink-3); }
.mt-bar {
  position: relative;
  width: 88px; height: 18px;
}
.mt-bar .axis {
  position: absolute; left: 50%; top: 0; bottom: 0;
  width: 1px; background: var(--line-strong);
}
.mt-bar .bar {
  position: absolute; top: 4px; height: 10px;
  background: var(--ink);
  border-radius: 2px;
}
.mt-bar .bar.pos { background: var(--positive); left: 50%; }
.mt-bar .bar.neg { background: var(--negative); right: 50%; }

/* srm + guardrails */
.guardrails {
  padding: 0;
}
.g-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 13px 22px;
  border-bottom: 1px dashed var(--line);
  align-items: center;
}
.g-row:last-child { border-bottom: none; }
.g-label { font-size: 13px; color: var(--ink); }
.g-label .sub {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  margin-top: 2px;
}
.g-pass, .g-warn, .g-fail {
  font-family: var(--mono);
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  display: inline-flex; align-items: center; gap: 6px;
}
.g-pass { background: #F0F6F0; color: var(--positive); border: 1px solid #CFE3CF; }
.g-warn { background: #FBF4E8; color: var(--caution); border: 1px solid #E9D9B0; }
.g-fail { background: #FBF2F2; color: var(--negative); border: 1px solid #E9C9C9; }
.g-pass::before, .g-warn::before, .g-fail::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: currentColor; display: inline-block;
}

/* log / timeline */
.timeline {
  padding: 16px 22px 20px;
  display: flex; flex-direction: column; gap: 14px;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 30px; top: 26px; bottom: 26px;
  width: 1px; background: var(--line);
}
.t-item {
  display: grid;
  grid-template-columns: 20px 1fr auto;
  gap: 16px;
  align-items: flex-start;
}
.t-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--ink-3);
  margin: 6px 0 0 5px;
  position: relative; z-index: 1;
  box-shadow: 0 0 0 3px var(--surface);
}
.t-dot.accent { background: var(--accent); }
.t-dot.positive { background: var(--positive); }
.t-body .t-title {
  font-size: 13px;
  color: var(--ink);
}
.t-body .t-desc {
  font-size: 12px;
  color: var(--ink-2);
  margin-top: 2px;
}
.t-when {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
  white-space: nowrap;
}

/* ———————————————————————————— modal */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(20,17,11,.35);
  display: grid; place-items: center;
  z-index: 50;
  backdrop-filter: blur(2px);
  animation: fade .15s ease-out;
}
.modal-backdrop.is-closed { display: none !important; }
.modal-backdrop[hidden] { display: none !important; }
@keyframes fade { from { opacity: 0; } }
.modal {
  background: var(--surface);
  width: min(560px, calc(100% - 32px));
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: 0 30px 60px -20px rgba(20,17,11,.35);
  overflow: hidden;
  animation: pop .2s cubic-bezier(.2,.8,.2,1);
}
@keyframes pop { from { transform: translateY(8px); opacity: 0; } }
.modal-head {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
}
.modal-head h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 20px;
  margin: 0;
  letter-spacing: -0.005em;
}
.modal-body { padding: 18px 20px; display: flex; flex-direction: column; gap: 12px; }
.modal-foot {
  padding: 12px 20px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: flex-end; gap: 8px;
  background: var(--surface-2);
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field > span {
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.field input, .field textarea, .field select {
  font: inherit;
  padding: 9px 11px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 13px;
  transition: border-color .12s, background .12s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--surface);
}
.row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.hint {
  font-size: 12px;
  color: var(--ink-2);
  padding: 10px 12px;
  background: var(--surface-2);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  line-height: 1.5;
}
.hint .mono { font-family: var(--mono); font-size: 11.5px; }

/* ———————————————————————————— empty */
.empty {
  padding: 80px 36px;
  text-align: center;
  color: var(--ink-3);
  font-family: var(--serif);
  font-size: 22px;
  font-style: italic;
}