/* The Experiment Journal — Lab Notebook visual.
   Graph-paper grid, control/test marks, green ink, no rounded corners, no emoji. */
:root {
  --bg: #f6f7f4;
  --paper: #ffffff;
  --ink: #2a332d;
  --muted: #6b7a6f;
  --line: #ccd7cd;
  --grid: #e5ebe4;
  --accent: #15803d;
  --accent-dark: #0f5c2c;
  --case: #15803d;
  --tool: #0e6f86;
  --stat: #6d4fb0;
  --design: #a8621a;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 26px 26px;
  color: var(--ink);
  line-height: 1.62;
  font-size: 16px;
}
.bound { max-width: 1100px; margin: 0 auto; padding: 0 22px; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); text-decoration: underline; }
h1, h2, h3 { letter-spacing: -0.01em; }

/* header */
.lab-header { background: var(--paper); border-bottom: 3px solid var(--ink); }
.lab-header-inner { display: flex; align-items: center; justify-content: space-between; padding: 15px 22px; }
.lab-brand { display: flex; align-items: center; gap: 13px; color: var(--ink); }
.lab-mark {
  position: relative; width: 42px; height: 42px; border: 2px solid var(--accent);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 7px 7px;
  display: inline-block; flex: 0 0 auto;
}
.lab-mark .mk { position: absolute; width: 10px; height: 10px; }
.lab-mark .mk-ctrl { left: 5px; top: 5px; border: 2px solid var(--accent); }
.lab-mark .mk-test { right: 5px; bottom: 5px; background: var(--accent); }
.lab-brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.lab-brand-name { font-weight: 700; letter-spacing: .2px; }
.lab-brand-tag { font-size: 11px; color: var(--muted); letter-spacing: 1.2px; text-transform: uppercase; }
.lab-nav { display: flex; gap: 20px; }
.lab-nav a { color: var(--ink); font-size: 14px; font-weight: 600; padding-bottom: 3px; border-bottom: 2px solid transparent; }
.lab-nav a:hover { border-bottom-color: var(--accent); text-decoration: none; }

/* hero = the bench */
.bench { background: var(--paper); border-bottom: 1px solid var(--line); padding: 46px 0 40px; }
.bench-inner { position: relative; }
.bench-kicker { color: var(--accent); font-size: 12px; letter-spacing: 2.4px; font-weight: 700; margin-bottom: 12px; }
.bench h1 { font-size: 36px; line-height: 1.13; font-weight: 700; margin-bottom: 14px; max-width: 820px; }
.bench-lede { max-width: 700px; color: var(--ink); font-size: 17px; }
.bench-note { margin-top: 14px; font-size: 13px; color: var(--muted); border-left: 3px solid var(--accent); padding-left: 12px; }

/* section labels */
.panel-label { font-size: 12px; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; font-weight: 700; }
section { padding: 30px 0; }

/* key panel */
.key-list { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 26px; }
.key-list li { font-size: 14px; color: var(--ink); display: flex; align-items: baseline; gap: 10px; }

/* trial flags */
.trial-flag {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .7px;
  text-transform: uppercase; padding: 2px 8px; border: 1px solid currentColor; white-space: nowrap;
}
.f-case { color: var(--case); }
.f-tool { color: var(--tool); }
.f-stat { color: var(--stat); }
.f-design { color: var(--design); }

/* track cards */
.track-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.track-card {
  background: var(--paper); border: 1px solid var(--line); padding: 16px 16px 0;
  display: flex; flex-direction: column; gap: 4px; color: var(--ink); position: relative; overflow: hidden;
}
.track-card:hover { border-color: var(--ink); text-decoration: none; }
.track-count { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.track-name { font-weight: 700; font-size: 17px; }
.track-bar { display: block; height: 6px; margin-top: 12px; }
.track-bar.f-case { background: var(--case); }
.track-bar.f-tool { background: var(--tool); }
.track-bar.f-stat { background: var(--stat); }
.track-bar.f-design { background: var(--design); }

/* arm blocks / groups */
.arm-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 16px; }
.arm-head h2 { font-size: 22px; font-weight: 700; }
.arm-more { font-size: 13px; font-weight: 600; }
.trial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }

/* trial card = experiment card */
.trial-card {
  background: var(--paper); border: 1px solid var(--line); border-top: 3px solid var(--accent);
  padding: 16px; display: flex; flex-direction: column; gap: 10px; color: var(--ink);
}
.trial-card:hover { border-color: var(--ink); border-top-color: var(--accent-dark); text-decoration: none; }
.trial-title { font-weight: 700; font-size: 16px; line-height: 1.28; }
.trial-readout {
  display: grid; grid-template-columns: 1fr; gap: 4px; border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line); padding: 9px 0;
}
.trial-readout .cell { font-size: 13px; color: var(--ink); line-height: 1.4; }
.trial-readout .cell b {
  display: block; font-size: 10px; letter-spacing: .8px; text-transform: uppercase;
  color: var(--muted); font-weight: 700; margin-bottom: 1px;
}
.trial-readout .metric b { color: var(--accent); }
.trial-abs { font-size: 13px; color: var(--muted); }

/* page head */
.plate { padding: 34px 0 10px; }
.crumb { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.crumb a { color: var(--muted); }
.plate h1 { font-size: 31px; line-height: 1.18; font-weight: 700; max-width: 820px; }
.plate-lede { color: var(--muted); margin-top: 8px; }

/* article layout */
.bench-layout { display: grid; grid-template-columns: 320px 1fr; gap: 30px; padding-top: 22px; padding-bottom: 44px; }

/* record card = experiment card (fact sheet) */
.record-card {
  align-self: start; background: var(--paper); border: 1px solid var(--line); border-top: 3px solid var(--accent);
  position: sticky; top: 16px;
}
.record-top { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.record-label { font-size: 11px; letter-spacing: 1.1px; text-transform: uppercase; color: var(--muted); font-weight: 700; }
.record-rows { font-variant-numeric: tabular-nums; }
.record-row { display: flex; border-bottom: 1px solid var(--line); font-size: 14px; }
.record-row:last-child { border-bottom: 0; }
.record-row dt {
  flex: 0 0 42%; padding: 10px 14px; color: var(--muted); font-weight: 600;
  border-right: 1px solid var(--line);
}
.record-row dd { flex: 1; padding: 10px 14px; }

/* notebook prose */
.notebook { background: var(--paper); border: 1px solid var(--line); padding: 26px 30px; }
.notebook .sec { margin-bottom: 26px; }
.notebook .sec:last-child { margin-bottom: 0; }
.notebook h2 { font-size: 19px; font-weight: 700; margin-bottom: 10px; display: flex; align-items: baseline; gap: 10px; }
.sec-num {
  color: var(--accent); font-variant-numeric: tabular-nums; font-size: 13px; font-weight: 700;
  border: 1px solid var(--accent); padding: 0 6px; flex: 0 0 auto;
}
.notebook p { margin-bottom: 12px; color: #333c35; }
.notebook p:last-child { margin-bottom: 0; }
.notebook h2:not(:first-child) { margin-top: 4px; }
.adjacent-list { list-style: none; margin: 0; padding: 0; }
.adjacent-list li { padding: 7px 0; border-bottom: 1px solid var(--line); }
.adjacent-list li:last-child { border-bottom: 0; }

/* footer */
.lab-footer { background: var(--paper); border-top: 3px solid var(--ink); margin-top: 24px; padding: 30px 0; }
.lab-footer-inner { display: flex; flex-wrap: wrap; gap: 20px; align-items: flex-start; }
.lab-footer-brand { flex: 1 1 320px; }
.lab-footer-brand .lab-brand-name { font-weight: 700; }
.lab-footer-brand p { color: var(--muted); font-size: 14px; margin-top: 6px; }
.lab-footer-nav { display: flex; gap: 16px; }
.lab-footer-nav a { color: var(--ink); font-size: 14px; font-weight: 600; }
.lab-copy { flex: 1 1 100%; font-size: 12px; color: var(--muted); margin-top: 10px; }

@media (max-width: 900px) {
  .track-grid { grid-template-columns: repeat(2, 1fr); }
  .trial-grid { grid-template-columns: repeat(2, 1fr); }
  .key-list { grid-template-columns: 1fr; }
  .bench-layout { grid-template-columns: 1fr; }
  .record-card { position: static; }
}
@media (max-width: 580px) {
  .track-grid, .trial-grid { grid-template-columns: 1fr; }
  .lab-header-inner { flex-direction: column; gap: 10px; align-items: flex-start; }
  .lab-nav { gap: 14px; }
  .bench h1 { font-size: 29px; }
  .notebook { padding: 20px 18px; }
}