/* AgriDesign — Design and analysis of agricultural experiments
   Single stylesheet. No frameworks. */

:root {
  --bg: #f4f6f3;
  --bg-soft: #e9eee7;
  --card-bg: #ffffff;
  --text: #1c2420;
  --text-muted: #5f6b64;
  --border: #dde4dc;
  --border-strong: #c3cdc2;
  --primary: #2f7d4f;
  --primary-dark: #256640;
  --primary-soft: rgba(47, 125, 79, 0.10);
  --accent: #c8842a;
  --accent-soft: rgba(200, 132, 42, 0.12);
  --sky: #2b7bb9;
  --success: #2f9e44;
  --danger: #c93a2c;
  --warning: #d98a1c;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 6px 20px rgba(16, 24, 40, 0.05);
  --mono: "Cascadia Code", "SF Mono", Consolas, "Liberation Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111613; --bg-soft: #191f1b; --card-bg: #1a211c; --text: #e6ece7;
    --text-muted: #9aa79e; --border: #2a332c; --border-strong: #3a463d;
    --primary: #5fbf85; --primary-dark: #4daa73; --primary-soft: rgba(95, 191, 133, 0.14);
    --accent: #e0a24e; --accent-soft: rgba(224, 162, 78, 0.16); --sky: #5aa6dd;
    --shadow: 0 1px 2px rgba(0,0,0,0.4), 0 6px 20px rgba(0,0,0,0.25);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
main { max-width: 1180px; margin: 0 auto; padding: 0 20px 80px; }
a { color: var(--primary); }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: var(--card-bg); border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1180px; margin: 0 auto; padding: 8px 20px;
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -0.4px; font-size: 1.1rem; cursor: pointer; }
.brand svg { width: 30px; height: 30px; }
.brand .brand-sub { font-weight: 500; color: var(--text-muted); font-size: 0.78rem; letter-spacing: 0; margin-left: 2px; }
.stepper { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }
.step-btn {
  padding: 6px 10px; border: 1px solid transparent; background: transparent; color: var(--text-muted);
  border-radius: 9px; cursor: pointer; font-size: 0.8rem; font-family: inherit;
  display: inline-flex; align-items: center; gap: 6px; transition: all .15s;
}
.step-btn .step-num {
  width: 20px; height: 20px; border-radius: 50%; background: var(--bg-soft); color: var(--text);
  display: inline-flex; align-items: center; justify-content: center; font-size: 0.7rem; font-weight: 700;
}
.step-btn:hover:not(:disabled) { background: var(--bg-soft); color: var(--text); }
.step-btn.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; border-color: rgba(47,125,79,0.25); }
.step-btn.active .step-num { background: var(--primary); color: #fff; }
.step-btn:disabled { opacity: 0.38; cursor: not-allowed; }
.step-btn.soon .step-num { background: var(--bg-soft); color: var(--text-muted); }

/* ---------- Hero (Block 1) ---------- */
.hero {
  position: relative; overflow: hidden; border-radius: 22px; margin: 22px 0 26px;
  background:
    radial-gradient(1200px 500px at 15% -10%, rgba(47,125,79,0.22), transparent 60%),
    radial-gradient(900px 400px at 95% 10%, rgba(200,132,42,0.18), transparent 60%),
    linear-gradient(180deg, var(--card-bg), var(--bg-soft));
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.hero-inner { display: grid; grid-template-columns: 1.05fr 1fr; gap: 24px; align-items: center; padding: 48px 48px 40px; }
@media (max-width: 900px) { .hero-inner { grid-template-columns: 1fr; padding: 30px 22px; } }
.hero h1 { font-size: 3rem; line-height: 1.05; margin: 0 0 14px; letter-spacing: -1.4px; font-weight: 800; }
.hero h1 .accent { color: var(--primary); }
.hero .lead { font-size: 1.12rem; color: var(--text-muted); margin: 0 0 22px; max-width: 560px; }
.hero .lead b { color: var(--text); }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero-art { width: 100%; height: auto; max-height: 420px; }
.hero-art svg { width: 100%; height: auto; display: block; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 0.74rem; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--primary); border-radius: 2px; }
.badge-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 22px; }
.badge {
  font-size: 0.74rem; padding: 4px 11px; border-radius: 999px;
  background: var(--card-bg); border: 1px solid var(--border); color: var(--text-muted);
}
.badge.ok::before { content: "✓ "; color: var(--success); }

/* Feature grid */
.section-title { font-size: 1.5rem; letter-spacing: -0.5px; margin: 36px 0 6px; }
.section-sub { color: var(--text-muted); margin: 0 0 18px; max-width: 760px; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(255px, 1fr)); gap: 14px; }
.feature {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 18px 16px; box-shadow: var(--shadow); cursor: pointer; transition: transform .15s, border-color .15s;
  display: flex; flex-direction: column; gap: 8px; position: relative;
}
.feature:hover { transform: translateY(-2px); border-color: var(--primary); }
.feature .f-art { height: 110px; border-radius: 10px; background: var(--bg-soft); overflow: hidden; display: flex; align-items: center; justify-content: center; }
.feature .f-art svg { width: 100%; height: 100%; }
.feature .f-num { position: absolute; top: 10px; left: 10px; width: 26px; height: 26px; border-radius: 50%; background: var(--primary); color: #fff; font-size: 0.78rem; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.feature h3 { margin: 4px 0 0; font-size: 1rem; }
.feature p { margin: 0; font-size: 0.85rem; color: var(--text-muted); }
.feature .f-tag { font-size: 0.7rem; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: .06em; }
.feature.soon { opacity: .75; }
.feature.soon .f-tag { color: var(--text-muted); }

/* Design gallery */
.design-gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; }
.design-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 12px; text-align: center; }
.design-card svg { width: 100%; height: 118px; }
.design-card .d-name { font-weight: 600; font-size: 0.86rem; margin-top: 6px; }
.design-card .d-sub { font-size: 0.74rem; color: var(--text-muted); }

/* Why / comparison */
.why-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
.why { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.why .w-icon { font-size: 1.5rem; margin-bottom: 6px; }
.why h4 { margin: 0 0 4px; font-size: 0.95rem; text-transform: none; letter-spacing: 0; color: var(--text); }
.why p { margin: 0; font-size: 0.85rem; color: var(--text-muted); }

/* Workflow strip */
.workflow { display: flex; gap: 0; align-items: stretch; overflow-x: auto; padding: 6px 0 12px; }
.wf-step { flex: 1; min-width: 130px; position: relative; padding: 12px 14px 12px 18px; background: var(--card-bg); border: 1px solid var(--border); }
.wf-step:first-child { border-radius: 10px 0 0 10px; }
.wf-step:last-child { border-radius: 0 10px 10px 0; }
.wf-step + .wf-step { border-left: none; }
.wf-step .wf-n { font-size: 0.68rem; color: var(--primary); font-weight: 700; letter-spacing: .08em; }
.wf-step .wf-t { font-weight: 600; font-size: 0.84rem; }
.wf-step .wf-d { font-size: 0.74rem; color: var(--text-muted); }

/* ---------- Cards ---------- */
.card {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 26px; margin-bottom: 20px; box-shadow: var(--shadow);
}
.card h2 { margin: 0 0 4px; font-size: 1.28rem; letter-spacing: -0.3px; }
.card h3 { font-size: 1.02rem; margin: 18px 0 6px; }
.card h4 {
  font-size: 0.76rem; margin: 0 0 8px; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--text-muted); font-weight: 700;
}
.hint { color: var(--text-muted); font-size: 0.88rem; margin: 4px 0 12px; }
.step-panel { display: none; }
.step-panel.active { display: block; }
.card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.panel-title { display: flex; align-items: center; gap: 14px; margin: 22px 0 16px; }
.panel-title .pt-num { width: 40px; height: 40px; border-radius: 12px; background: var(--primary); color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; flex-shrink: 0; }
.panel-title h2 { margin: 0; font-size: 1.5rem; letter-spacing: -0.5px; }
.panel-title p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

/* ---------- Theory (accordion) ---------- */
.theory-card { border-left: 3px solid var(--accent); }
.acc { border-top: 1px solid var(--border); }
.acc:first-of-type { border-top: none; }
.acc > summary {
  cursor: pointer; padding: 12px 4px; font-weight: 600; font-size: 0.95rem;
  list-style: none; display: flex; align-items: center; gap: 10px;
}
.acc > summary::-webkit-details-marker { display: none; }
.acc > summary::before {
  content: "▸"; color: var(--accent); font-size: 0.85rem; transition: transform .15s;
  display: inline-block; width: 12px;
}
.acc[open] > summary::before { transform: rotate(90deg); }
.acc > summary:hover { color: var(--primary); }
.acc .acc-body { padding: 2px 4px 18px 26px; font-size: 0.9rem; }
.acc .acc-body p { margin: 0 0 10px; }
.acc .acc-body ul, .acc .acc-body ol { margin: 0 0 12px; padding-left: 20px; }
.acc .acc-body li { margin-bottom: 6px; }
.acc .acc-body table { margin: 8px 0 14px; }
.acc .acc-body svg.inline-art { float: right; width: 220px; margin: 0 0 10px 16px; }
@media (max-width: 700px) { .acc .acc-body svg.inline-art { float: none; width: 100%; margin: 0 0 10px; } }

.formula {
  font-family: var(--mono); background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 14px; margin: 10px 0; font-size: 0.86rem;
  overflow-x: auto; white-space: pre; line-height: 1.7;
}
code { font-family: var(--mono); background: var(--bg-soft); padding: 1px 5px; border-radius: 4px; font-size: 0.86em; }
.callout {
  border-left: 3px solid var(--primary); background: var(--bg-soft);
  padding: 10px 14px; border-radius: 0 8px 8px 0; margin: 12px 0; font-size: 0.88rem;
}
.callout.warn { border-left-color: var(--warning); }
.callout.crit { border-left-color: var(--danger); }
.callout.tip { border-left-color: var(--sky); }
.callout b:first-child { display: block; margin-bottom: 2px; }
.good-bad { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 10px 0; }
@media (max-width: 700px) { .good-bad { grid-template-columns: 1fr; } }
.good-bad > div { border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; font-size: 0.84rem; }
.good-bad .good { border-color: rgba(47,158,68,0.4); background: rgba(47,158,68,0.06); }
.good-bad .bad { border-color: rgba(201,58,44,0.4); background: rgba(201,58,44,0.06); }
.good-bad h5 { margin: 0 0 6px; font-size: 0.8rem; text-transform: uppercase; letter-spacing: .05em; }
.good-bad .good h5 { color: var(--success); } .good-bad .bad h5 { color: var(--danger); }
.mini-table { font-family: var(--mono); font-size: 0.78rem; border-collapse: collapse; }
.mini-table td, .mini-table th { border: 1px solid var(--border-strong); padding: 2px 8px; }
.mini-table th { background: var(--bg-soft); }
.mini-table td.merged { background: rgba(201,58,44,0.12); }

/* ---------- Forms ---------- */
input[type=text], input[type=number], select, textarea {
  padding: 8px 11px; border-radius: 8px; border: 1px solid var(--border-strong);
  background: var(--card-bg); color: var(--text); font-size: 0.9rem; max-width: 100%; font-family: inherit;
}
select:focus, input:focus { outline: 2px solid var(--primary-soft); border-color: var(--primary); }
input[type=color] { width: 40px; height: 28px; padding: 2px; border-radius: 6px; border: 1px solid var(--border-strong); background: var(--card-bg); cursor: pointer; }
.btn {
  padding: 10px 18px; border-radius: 10px; border: 1px solid transparent;
  font-size: 0.92rem; cursor: pointer; font-weight: 500; font-family: inherit;
  transition: background .15s, border-color .15s, color .15s, transform .1s;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-secondary { background: transparent; border-color: var(--border-strong); color: var(--text); }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--text-muted); padding: 6px 10px; font-size: 0.84rem; }
.btn-ghost:hover { color: var(--primary); background: var(--primary-soft); }
.btn-lg { padding: 14px 28px; font-size: 1.02rem; border-radius: 12px; }
.btn-sm { padding: 6px 12px; font-size: 0.82rem; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin: 14px 0 0; }
.inline-label { font-size: 0.88rem; color: var(--text-muted); display: inline-flex; gap: 7px; align-items: center; flex-wrap: wrap; }
.checkbox-label { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; cursor: pointer; margin-bottom: 6px; }
.field-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; margin: 10px 0; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field > label { font-size: 0.78rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.field > .field-help { font-size: 0.78rem; color: var(--text-muted); }

/* ---------- Drop zone ---------- */
.drop-zone {
  border: 2px dashed var(--border-strong); border-radius: var(--radius);
  padding: 34px 20px; text-align: center; cursor: pointer;
  background: var(--bg-soft); transition: border-color .15s, background .15s;
}
.drop-zone:hover, .drop-zone.dragover { border-color: var(--primary); background: var(--primary-soft); }
.drop-zone .dz-icon { width: 52px; height: 52px; margin: 0 auto 8px; }
.drop-zone p { margin: 4px 0; font-size: 0.92rem; }
.format-chips { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin-top: 10px; }
.format-chips span { font-size: 0.7rem; padding: 2px 8px; border-radius: 6px; background: var(--card-bg); border: 1px solid var(--border); color: var(--text-muted); font-family: var(--mono); }
.example-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 10px; margin-top: 10px; }
.example-btn {
  text-align: left; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--card-bg);
  cursor: pointer; font-family: inherit; color: var(--text); transition: border-color .15s;
}
.example-btn:hover { border-color: var(--primary); }
.example-btn b { display: block; font-size: 0.86rem; }
.example-btn small { color: var(--text-muted); font-size: 0.75rem; }

/* ---------- Messages ---------- */
.messages { margin-top: 14px; }
.msg { padding: 10px 14px; border-radius: 9px; font-size: 0.88rem; margin-bottom: 8px; }
.msg-error { background: rgba(201,58,44,0.1); color: var(--danger); border: 1px solid rgba(201,58,44,0.3); }
.msg-warning { background: rgba(217,138,28,0.1); color: var(--warning); border: 1px solid rgba(217,138,28,0.3); }
.msg-success { background: rgba(47,158,68,0.1); color: var(--success); border: 1px solid rgba(47,158,68,0.3); }
.msg-info { background: var(--primary-soft); color: var(--primary); border: 1px solid rgba(47,125,79,0.22); }

/* ---------- Tables ---------- */
.table-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; }
table { border-collapse: collapse; width: 100%; font-size: 0.86rem; }
caption { caption-side: top; text-align: left; padding: 8px 12px; font-weight: 600; font-size: 0.86rem; }
thead th {
  background: var(--bg-soft); text-align: left; padding: 9px 12px; font-weight: 600;
  border-bottom: 1px solid var(--border); white-space: nowrap; position: sticky; top: 0;
}
tbody td { padding: 7px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--bg-soft); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.total td { font-weight: 700; border-top: 2px solid var(--border-strong); }
tr.dim td { color: var(--text-muted); }

/* ---------- Stat tiles ---------- */
.results-summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 16px 0; }
.stat-tile { background: var(--bg-soft); border-radius: 10px; padding: 12px 16px; }
.stat-tile .stat-label { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 600; }
.stat-tile .stat-value { font-size: 1.35rem; font-weight: 700; margin-top: 2px; line-height: 1.2; }
.stat-tile .stat-sub { font-size: 0.75rem; color: var(--text-muted); }
.stat-tile.ok { box-shadow: inset 3px 0 0 var(--success); }
.stat-tile.warn { box-shadow: inset 3px 0 0 var(--warning); }
.stat-tile.bad { box-shadow: inset 3px 0 0 var(--danger); }

/* ---------- Variable configurator ---------- */
.var-table td { white-space: nowrap; }
.acc-body tbody td, .acc-body thead th { white-space: normal; }   /* theory tables wrap instead of overflowing the card */
.var-table select { padding: 5px 8px; font-size: 0.82rem; border-radius: 6px; }
.var-name { font-weight: 600; }
.pill { display: inline-block; font-size: 0.7rem; padding: 2px 8px; border-radius: 999px; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text-muted); }
.pill.num { background: rgba(43,123,185,0.12); border-color: rgba(43,123,185,0.3); color: var(--sky); }
.pill.cat { background: var(--accent-soft); border-color: rgba(200,132,42,0.3); color: var(--accent); }
.pill.id  { background: var(--primary-soft); border-color: rgba(47,125,79,0.25); color: var(--primary); }
.pill.off { opacity: 0.6; }
.flag { font-size: 0.74rem; color: var(--warning); }
.flag.bad { color: var(--danger); }
.flag.ok { color: var(--success); }
.spark { display: block; }
.role-legend { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 8px; margin: 8px 0 14px; }
.role-item { display: flex; gap: 10px; align-items: flex-start; font-size: 0.82rem; padding: 8px 10px; border: 1px solid var(--border); border-radius: 9px; }
.role-item .r-dot { width: 12px; height: 12px; border-radius: 3px; margin-top: 4px; flex-shrink: 0; }
.role-item b { display: block; }
.role-item span { color: var(--text-muted); }

/* Design summary */
.design-summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; margin: 12px 0; }
.ds-item { background: var(--bg-soft); border-radius: 10px; padding: 10px 14px; }
.ds-item .ds-label { font-size: 0.68rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); font-weight: 700; }
.ds-item .ds-value { font-weight: 600; font-size: 0.95rem; margin-top: 2px; word-break: break-word; }
.ds-item .ds-sub { font-size: 0.74rem; color: var(--text-muted); }

/* ---------- Check lists ---------- */
.check-list { list-style: none; padding: 0; margin: 10px 0 0; }
.check-item { display: flex; gap: 12px; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border); margin-bottom: 8px; background: var(--card-bg); align-items: flex-start; }
.check-item .ck-icon { font-size: 1.1rem; line-height: 1.3; flex-shrink: 0; width: 22px; text-align: center; }
.check-item .ck-body { flex: 1; min-width: 0; }
.check-item .ck-title { font-weight: 600; font-size: 0.92rem; }
.check-item .ck-text { font-size: 0.85rem; color: var(--text-muted); }
.check-item .ck-text b { color: var(--text); }
.check-item.ok { border-left: 3px solid var(--success); }
.check-item.warn { border-left: 3px solid var(--warning); }
.check-item.bad { border-left: 3px solid var(--danger); }
.check-item.info { border-left: 3px solid var(--sky); }
.verdict { display: flex; align-items: center; gap: 18px; padding: 18px 22px; border-radius: var(--radius); background: var(--bg-soft); margin: 4px 0 16px; flex-wrap: wrap; }
.verdict .grade { font-size: 2.6rem; font-weight: 800; line-height: 1; min-width: 74px; text-align: center; }
.verdict .grade small { display: block; font-size: 0.66rem; font-weight: 600; letter-spacing: .08em; color: var(--text-muted); text-transform: uppercase; }
.verdict .v-text { flex: 1; min-width: 240px; font-size: 0.92rem; }
.grade.g-a { color: var(--success); } .grade.g-b { color: var(--sky); } .grade.g-c { color: var(--warning); } .grade.g-d { color: var(--danger); }

/* ---------- Figures ---------- */
.fig-block { border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; margin: 14px 0; background: var(--card-bg); }
.fig-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.fig-head h4 { margin: 0; }
.fig-canvas { overflow-x: auto; text-align: center; background: var(--card-bg); border-radius: 8px; }
.fig-canvas svg { max-width: 100%; height: auto; }
.fig-tools { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; border-top: 1px dashed var(--border); margin-top: 10px; padding-top: 10px; }
.fig-tools .inline-label { font-size: 0.8rem; }
.fig-tools select { padding: 5px 8px; font-size: 0.8rem; }
.fig-tabs { display: flex; gap: 4px; margin-top: 8px; }
.fig-tab { font-family: inherit; font-size: 0.78rem; padding: 5px 10px; border-radius: 7px; border: 1px solid var(--border); background: transparent; color: var(--text-muted); cursor: pointer; }
.fig-tab.active { background: var(--primary-soft); color: var(--primary); border-color: rgba(47,125,79,0.3); font-weight: 600; }
.fig-opts { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; padding: 10px 0 0; margin-top: 4px; }
.fig-opts .inline-label { font-size: 0.8rem; }
.fig-opts input[type=range] { flex: 1; min-width: 90px; }
.fig-opts input[type=text] { width: 100%; }
.range-val { font-family: var(--mono); font-size: 0.74rem; color: var(--text); background: var(--bg-soft); border-radius: 5px; padding: 1px 5px; min-width: 34px; text-align: center; }
details.fig-editor > summary { cursor: pointer; font-size: 0.82rem; color: var(--primary); padding: 4px 0; }
.color-row { display: flex; flex-wrap: wrap; gap: 8px; }
.color-item { display: inline-flex; flex-direction: column; align-items: center; gap: 2px; font-size: 0.68rem; color: var(--text-muted); max-width: 70px; }
.color-item small { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 70px; }
.fig-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 900px) { .fig-grid { grid-template-columns: 1fr; } }

/* ---------- Misc ---------- */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 820px) { .two-col { grid-template-columns: 1fr; } }
.divider { height: 1px; background: var(--border); margin: 20px 0; border: none; }
.footer-note { text-align: center; color: var(--text-muted); font-size: 0.8rem; padding: 10px 20px 40px; }
.loading { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--border-strong); border-top-color: var(--primary); border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -2px; }
@keyframes spin { to { transform: rotate(360deg); } }
.soon-box { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.soon-box svg { width: 180px; height: 120px; margin-bottom: 10px; }
.kbd { font-family: var(--mono); font-size: 0.78rem; border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 5px; padding: 0 5px; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 10px 0; }
.tab { font-family: inherit; font-size: 0.84rem; padding: 7px 13px; border-radius: 9px; border: 1px solid var(--border); background: transparent; color: var(--text-muted); cursor: pointer; }
.tab.active { background: var(--primary-soft); color: var(--primary); border-color: rgba(47,125,79,0.3); font-weight: 600; }
.next-bar { display: flex; justify-content: flex-end; gap: 10px; margin: 6px 0 30px; }

/* art colour classes (SVG illustrations use CSS variables so they follow the theme) */
.art-p { fill: var(--primary); } .art-p2 { fill: var(--primary-dark); } .art-a { fill: var(--accent); }
.art-s { fill: var(--sky); } .art-soil { fill: #8c5a3c; } .art-soil2 { fill: #6b4630; }
.art-line { stroke: var(--text-muted); fill: none; } .art-bg { fill: var(--bg-soft); }
.art-txt { fill: var(--text); font-family: inherit; } .art-mut { fill: var(--text-muted); }
.art-card { fill: var(--card-bg); stroke: var(--border); }

/* ---------- Block 6 gallery ---------- */
.fig6-wrap { margin: 14px 0 22px; }
.fig6-pick { font-size: 0.8rem; color: var(--text-muted); margin: 4px 0 0 6px; }
.preset-btn.active { background: var(--primary-soft); color: var(--primary); border-color: rgba(47,125,79,0.3); font-weight: 600; }

/* ---------- Home: simulator (blocking vs CRD) ---------- */
.playground { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px 20px 16px; }
.pg-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 900px) { .pg-grid { grid-template-columns: 1fr; } }
.pg-pane { border: 1px solid var(--border); border-radius: 10px; background: var(--bg-soft); overflow: hidden; padding-bottom: 6px; }
.pg-pane svg { width: 100%; height: auto; display: block; }
.pg-title { font-size: 0.72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--text-muted); padding: 8px 12px 4px; }
.pg-controls { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 12px; }
.pg-status { font-size: 0.84rem; color: var(--text-muted); margin-top: 10px; min-height: 1.4em; }
.pg-status b { color: var(--text); }
.slider-row { display: grid; grid-template-columns: auto 1fr auto; gap: 8px; align-items: center; font-size: 0.82rem; }
.slider-row label { color: var(--text-muted); white-space: nowrap; }
.slider-row input[type=range] { width: 100%; accent-color: var(--primary); }
.sim-readout { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; padding: 6px 10px 4px; }
.sim-readout .rd { background: var(--card-bg); border: 1px solid var(--border); border-radius: 8px; padding: 5px 8px; }
.sim-readout .rd-l { font-size: 0.62rem; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); font-weight: 700; }
.sim-readout .rd-v { font-size: 0.98rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.sim-readout .rd.sig { border-color: var(--success); box-shadow: inset 3px 0 0 var(--success); }
.pg-power-row { display: grid; grid-template-columns: 60px 1fr 52px; gap: 10px; align-items: center; font-size: 0.86rem; padding: 3px 12px; }
.pg-power-bar { height: 14px; background: var(--bg-soft); border-radius: 7px; overflow: hidden; }
.pg-power-bar div { height: 100%; border-radius: 7px; transition: width .4s; }
#pgPower { margin-top: 12px; border: 1px dashed var(--border); border-radius: 10px; padding-bottom: 8px; }
#pgPower:empty { display: none; }

/* ---------- Home: kinds of experiments, methods, comparison, cite ---------- */
.kind-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; }
.kind-tile { text-align: left; font-family: inherit; color: var(--text); background: var(--card-bg); border: 1.5px solid var(--border); border-radius: 12px; padding: 10px 12px 12px; transition: border-color .15s, transform .15s; }
.kind-tile:hover { border-color: var(--primary); transform: translateY(-2px); }
.kind-tile svg { width: 100%; height: 76px; display: block; }
.kind-tile .kt-t { font-weight: 700; font-size: 0.88rem; margin-top: 6px; }
.kind-tile .kt-s { font-size: 0.76rem; color: var(--text-muted); line-height: 1.35; }
.kind-tile .kt-k { display: inline-block; font-size: 0.64rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; padding: 1px 7px; border-radius: 999px; margin-top: 6px; background: var(--primary-soft); color: var(--primary); }
.method-gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; }
.mcard { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; display: flex; gap: 10px; align-items: flex-start; }
.mcard svg { width: 64px; height: 44px; flex-shrink: 0; border-radius: 6px; background: var(--bg-soft); }
.mcard .m-n { font-weight: 700; font-size: 0.86rem; }
.mcard .m-s { font-size: 0.74rem; color: var(--text-muted); }
.mcard .m-f { font-size: 0.62rem; text-transform: uppercase; letter-spacing: .06em; color: var(--accent); font-weight: 700; }
.compare-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; background: var(--card-bg); }
.compare-wrap table { font-size: 0.86rem; }
.compare-wrap td.yes { color: var(--success); font-weight: 700; text-align: center; }
.acc > summary .acc-tag { margin-left: auto; font-size: 0.68rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .06em; }
.cite-card { border-left: 3px solid var(--primary); }
.cite-ref { font-size: 1rem; line-height: 1.6; margin: 0; padding: 12px 16px; background: var(--bg-soft); border-radius: 10px; }
.cite-ref a { word-break: break-all; }
.cite-card .formula { white-space: pre; }