/* Open by Design (prototype). Editorial family from digidutter/DESIGN.md:
   warm paper, hairline cards, muted turquoise with warm amber, system sans,
   4px radius. Student texts are set in a serif so they read as submissions.
   The SEA-EU band and the EU statement come from ../brand/seaeu-brand.css. */

:root {
  color-scheme: light dark;
  --bg: #faf8f3;
  --surface: #ffffff;
  --sunk: #f3f0e8;
  --text: #1d2a31;
  --text-2: #3c4a52;
  --muted: #627078;
  --hair: rgba(29, 42, 49, 0.14);
  --hair-strong: rgba(29, 42, 49, 0.28);
  --cool: #0f7479;
  --cool-ink: #0b5e62;
  --cool-soft: #e3f1f0;
  --warm: #a8641a;
  --warm-soft: #f8ecdb;
  --good: #2f7a52;
  --good-soft: #e4f2ea;
  --bad: #b04a32;
  --bad-soft: #f8e6e1;
  --dot-a: #b04a32;
  --dot-b: #2f7a52;
  --dot-c: #2f63a8;
  --dot-d: #8a6414;
  --sans: -apple-system, BlinkMacSystemFont, system-ui, "Segoe UI", sans-serif;
  --serif: Charter, "Bitstream Charter", "Iowan Old Style", Georgia, serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --font-ui: var(--sans);
  --r: 4px;
  --wrap: 1180px;
  --pad: clamp(18px, 5vw, 44px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12181b;
    --surface: #1a2226;
    --sunk: #151c1f;
    --text: #e6ecee;
    --text-2: #c3cdd1;
    --muted: #93a2a9;
    --hair: rgba(230, 236, 238, 0.14);
    --hair-strong: rgba(230, 236, 238, 0.3);
    --cool: #4fb3b6;
    --cool-ink: #7fcfd1;
    --cool-soft: #183236;
    --warm: #e0a24a;
    --warm-soft: #33281a;
    --good: #6cc495;
    --good-soft: #17301f;
    --bad: #ec8a72;
    --bad-soft: #3a211b;
    --dot-a: #ec8a72;
    --dot-b: #6cc495;
    --dot-c: #7fa8e6;
    --dot-d: #d9ad55;
  }
  /* the official logos are dark artwork: keep them on white */
  .seaeu-band { background: #ffffff; }
  .seaeu-band .seaeu-band-inner { border-bottom: 0; }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--sans); font-size: 17px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { color: var(--cool-ink); text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--warm); outline-offset: 2px; }
h1, h2, h3 { line-height: 1.2; margin: 0; }
h1 { font-size: clamp(30px, 4.4vw, 44px); letter-spacing: -0.02em; font-weight: 700; }
h2 { font-size: clamp(24px, 3vw, 30px); letter-spacing: -0.015em; font-weight: 700; margin-bottom: 12px; }
h3 { font-size: 18px; letter-spacing: -0.01em; font-weight: 650; }
p { margin: 0 0 1em; }
small { display: block; color: var(--muted); font-size: 14px; line-height: 1.5; }
.obd-quiet { color: var(--muted); font-size: 15px; }
.obd-noscript { color: var(--muted); }

.obd-wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--pad); }

/* ---------- top bar ---------- */
.obd-top { border-bottom: 1px solid var(--hair); background: var(--surface); }
.obd-top .obd-wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 12px; padding-bottom: 12px; }
.obd-home { text-decoration: none; color: var(--text); display: inline-flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.obd-home b { font-size: 18px; letter-spacing: -0.01em; }
.obd-home span { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.obd-proto-tag { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--warm); border: 1px solid var(--warm); border-radius: var(--r); padding: 2px 8px; white-space: nowrap; }

/* ---------- layout ---------- */
.obd-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0 48px; padding-bottom: 72px; }
.obd-main { min-width: 0; max-width: 760px; }
@media (min-width: 1100px) {
  .obd-layout { grid-template-columns: minmax(0, 1fr) 300px; }
}

/* ---------- hero ---------- */
.obd-hero { padding: clamp(32px, 6vw, 56px) 0 8px; }
.obd-kicker, .obd-label { font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--cool-ink); margin: 0 0 12px; }
.obd-label span { color: var(--warm); margin-right: 6px; }
.obd-sub { font-size: 19px; color: var(--text-2); margin: 14px 0 18px; max-width: 40em; }
.obd-meta { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.obd-meta li { font-family: var(--mono); font-size: 12.5px; color: var(--text-2); border: 1px solid var(--hair); border-radius: var(--r); padding: 3px 9px; background: var(--surface); }

.obd-note { margin: 28px 0 8px; padding: 16px 20px; border: 1px dashed var(--warm); border-radius: var(--r); background: var(--warm-soft); font-size: 15px; color: var(--text-2); }
.obd-note p:last-child { margin-bottom: 0; }

/* ---------- sections ---------- */
.obd-section { padding-top: clamp(40px, 6vw, 64px); }
.obd-section > p { max-width: 40em; }
.obd-ws { margin-top: clamp(40px, 6vw, 64px); padding: 24px clamp(18px, 3vw, 32px) 28px; background: var(--surface); border: 1px solid var(--hair); border-left: 4px solid var(--warm); border-radius: var(--r); }
.obd-ws .obd-label { color: var(--warm); }

/* ---------- form fields ---------- */
.obd-fields { display: grid; gap: 18px; margin-top: 8px; }
.obd-row { display: flex; flex-wrap: wrap; gap: 16px; }
.obd-row > .obd-field { flex: 1 1 220px; }
.obd-row > .obd-field--narrow { flex: 0 1 150px; }
.obd-field { display: grid; gap: 6px; border: 0; padding: 0; margin: 0 0 18px; min-width: 0; }
.obd-fields .obd-field { margin-bottom: 0; }
.obd-field > span, .obd-field legend { font-weight: 600; font-size: 15.5px; padding: 0; }
.obd-field legend { margin-bottom: 8px; }
.obd-field small { margin-top: -2px; }
input[type="text"], input[type="number"], select, textarea {
  font: inherit; font-size: 16px; color: var(--text); background: var(--bg);
  border: 1px solid var(--hair-strong); border-radius: var(--r); padding: 9px 11px; width: 100%;
}
textarea { resize: vertical; line-height: 1.5; }
input::placeholder, textarea::placeholder { color: var(--muted); opacity: 0.8; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--cool); outline-offset: 0; border-color: transparent; }

.obd-lane { margin: -4px 0 0; font-size: 15px; color: var(--text-2); min-height: 1.5em; }
.obd-lane b { color: var(--text); }

/* segmented radios */
.obd-seg { display: flex; flex-wrap: wrap; gap: 6px; }
.obd-seg label, .obd-choice label { position: relative; cursor: pointer; }
.obd-seg input, .obd-choice input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.obd-seg span, .obd-choice span { display: inline-block; padding: 7px 12px; border: 1px solid var(--hair-strong); border-radius: var(--r); font-size: 15px; background: var(--surface); transition: transform .12s ease, box-shadow .12s ease; }
.obd-seg label:hover span, .obd-choice label:hover span { transform: translateY(-1px); box-shadow: 0 2px 6px rgba(0,0,0,.08); }
.obd-seg input:checked + span, .obd-choice input:checked + span { background: var(--cool); border-color: var(--cool); color: #fff; }
.obd-seg input:focus-visible + span, .obd-choice input:focus-visible + span { outline: 2px solid var(--warm); outline-offset: 2px; }
@media (prefers-color-scheme: dark) {
  .obd-seg input:checked + span, .obd-choice input:checked + span { color: #0d1416; }
}

.obd-checks, .obd-radios { display: grid; gap: 8px; }
.obd-checks label, .obd-radios label { display: flex; gap: 10px; align-items: flex-start; font-size: 15.5px; cursor: pointer; }
.obd-checks input, .obd-radios input { margin-top: 5px; accent-color: var(--cool); flex-shrink: 0; width: 16px; height: 16px; }
.obd-checks--single { margin: 18px 0; }
.obd-qlist .obd-field > span { font-weight: 600; font-size: 14.5px; color: var(--text-2); }

.obd-cost { margin-top: 8px; padding: 16px 18px 18px; background: var(--sunk); border-radius: var(--r); }
.obd-cost-h { font-weight: 650; margin: 0 0 10px; }
.obd-cost .obd-field { margin-bottom: 0; }
.obd-cost-out { font-family: var(--mono); font-size: 15px; margin: 14px 0 8px; color: var(--text); min-height: 1.5em; }

/* ---------- buttons ---------- */
.obd-btn { font: inherit; font-size: 15px; font-weight: 600; cursor: pointer; border-radius: var(--r); padding: 9px 16px; border: 1px solid var(--cool); background: var(--cool); color: #fff; transition: transform .12s ease, box-shadow .12s ease; }
.obd-btn:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 3px 8px rgba(0,0,0,.12); }
.obd-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.obd-btn--ghost { background: transparent; color: var(--cool-ink); }
@media (prefers-color-scheme: dark) { .obd-btn:not(.obd-btn--ghost) { color: #0d1416; } }
.obd-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 14px; }
.obd-flash { font-family: var(--mono); font-size: 13px; color: var(--good); }
.obd-hint { font-size: 14px; color: var(--muted); }

/* ---------- shared game pieces ---------- */
.obd-game { margin-top: 20px; }
.obd-exam { border: 1px solid var(--hair-strong); border-radius: var(--r); background: var(--surface); padding: 18px 20px; margin-bottom: 20px; }
.obd-exam-meta { font-family: var(--mono); font-size: 12px; color: var(--muted); margin: 0 0 8px; letter-spacing: 0.02em; }
.obd-exam-q { font-family: var(--serif); font-size: 18px; line-height: 1.55; margin: 0 0 10px; }
.obd-exam-lo { font-size: 14.5px; color: var(--text-2); margin: 0; padding-top: 10px; border-top: 1px solid var(--hair); }

.obd-box { margin: 20px 0; padding: 16px 20px; border-radius: var(--r); background: var(--cool-soft); border-left: 3px solid var(--cool); }
.obd-box h3 { margin-bottom: 8px; font-size: 16.5px; }
.obd-box p { font-size: 15.5px; }
.obd-box p:last-child { margin-bottom: 0; }
.obd-box--warm { background: var(--warm-soft); border-left-color: var(--warm); }

.obd-feedback { margin: 14px 0 0; padding: 14px 18px; border-radius: var(--r); font-size: 15.5px; background: var(--sunk); }
.obd-feedback p:last-child { margin-bottom: 0; }
.obd-feedback--good { background: var(--good-soft); }
.obd-feedback--bad { background: var(--bad-soft); }

/* ---------- Can you tell? ---------- */
.cyt-answers { display: grid; gap: 16px; }
.cyt-card { border: 1px solid var(--hair); border-radius: var(--r); background: var(--surface); padding: 16px 20px 18px; }
.cyt-card-h { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.cyt-badge { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; font-family: var(--mono); font-size: 13px; font-weight: 700; color: #fff; flex-shrink: 0; }
@media (prefers-color-scheme: dark) { .cyt-badge { color: #0d1416; } }
.cyt-badge[data-id="A"] { background: var(--dot-a); }
.cyt-badge[data-id="B"] { background: var(--dot-b); }
.cyt-badge[data-id="C"] { background: var(--dot-c); }
.cyt-badge[data-id="D"] { background: var(--dot-d); }
.cyt-text { font-family: var(--serif); font-size: 17px; line-height: 1.6; color: var(--text); }
.cyt-text p { margin: 0 0 0.8em; }
.cyt-ask { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--hair); }
.cyt-ask-l { font-size: 14.5px; color: var(--text-2); font-weight: 600; }
.obd-choice { display: flex; flex-wrap: wrap; gap: 6px; }
.cyt-reveal { margin-top: 12px; padding: 12px 14px; border-radius: var(--r); background: var(--sunk); font-size: 15px; }
.cyt-reveal h4 { margin: 0 0 4px; font-size: 15px; }
.cyt-reveal p { margin: 0 0 6px; }
.cyt-reveal dl { display: grid; grid-template-columns: auto 1fr; gap: 2px 12px; margin: 8px 0 0; font-size: 14.5px; }
.cyt-reveal dt { color: var(--muted); }
.cyt-reveal dd { margin: 0; }
.cyt-cta { margin: 20px 0 0; display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }

.cyt-chart-wrap { margin: 28px 0 0; padding: 20px; border: 1px solid var(--hair); border-radius: var(--r); background: var(--surface); }
.cyt-chart { display: block; width: 100%; max-width: 520px; height: auto; margin: 4px auto 8px; }
.cyt-chart .axis { stroke: var(--hair-strong); stroke-width: 1.5; }
.cyt-chart .mid { stroke: var(--hair); stroke-width: 1; stroke-dasharray: 4 4; }
.cyt-chart .lbl { fill: var(--muted); font-family: var(--sans); font-size: 13px; }
.cyt-chart .lbl-q { fill: var(--muted); font-family: var(--sans); font-size: 11.5px; font-style: italic; opacity: 0.85; }
.cyt-chart .dot circle { stroke: var(--surface); stroke-width: 2; }
.cyt-chart .dot text { fill: #fff; font-family: var(--mono); font-size: 13px; font-weight: 700; text-anchor: middle; dominant-baseline: central; }
@media (prefers-color-scheme: dark) { .cyt-chart .dot text { fill: #0d1416; } }
.cyt-chart .dot { transition: transform 1.1s cubic-bezier(.3,.7,.2,1); }
.cyt-chart .dot[data-id="A"] circle { fill: var(--dot-a); }
.cyt-chart .dot[data-id="B"] circle { fill: var(--dot-b); }
.cyt-chart .dot[data-id="C"] circle { fill: var(--dot-c); }
.cyt-chart .dot[data-id="D"] circle { fill: var(--dot-d); }
.cyt-chart .diag { stroke: var(--cool); stroke-width: 2; stroke-dasharray: 6 5; opacity: 0.7; }
.cyt-chart .tick { stroke: var(--hair-strong); stroke-width: 1.5; }
.cyt-chart .drop { stroke-width: 2; stroke-dasharray: 1; stroke-dashoffset: 1; opacity: 0.55; transition: stroke-dashoffset 1.1s cubic-bezier(.3,.7,.2,1); }
.cyt-chart.is-placed .drop { stroke-dashoffset: 0; }
.cyt-chart .drop[data-id="A"] { stroke: var(--dot-a); }
.cyt-chart .drop[data-id="B"] { stroke: var(--dot-b); }
.cyt-chart .drop[data-id="C"] { stroke: var(--dot-c); }
.cyt-chart .drop[data-id="D"] { stroke: var(--dot-d); }
.cyt-legend { display: grid; gap: 6px; font-size: 15px; color: var(--text-2); max-width: 40em; margin: 8px auto 0; }
.cyt-legend p { margin: 0; display: flex; gap: 10px; align-items: baseline; }
.cyt-legend i { flex-shrink: 0; width: 22px; height: 0; border-top: 2px dashed var(--cool); transform: translateY(-4px); }
.cyt-legend .lm { border-top: 2px solid var(--dot-a); opacity: 0.7; }
.cyt-ways { margin: 0 0 20px; padding: 14px 18px; border: 1px solid var(--hair); border-radius: var(--r); background: var(--sunk); font-size: 15px; }
.cyt-ways-h { font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 0 0 8px; }
.cyt-ways ol { margin: 0; padding-left: 1.3em; display: grid; gap: 4px; }
.cyt-ask--way { border-top: 0; padding-top: 0; }
.cyt-ask--way select { width: auto; min-width: 0; max-width: 100%; flex: 1 1 220px; font-size: 15px; padding: 7px 10px; }
.cyt-hit { color: var(--good); font-weight: 600; white-space: nowrap; }
.cyt-turn { margin-top: 24px; }
.cyt-turn .obd-checks { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); margin: 10px 0 14px; }
@media (prefers-reduced-motion: reduce) {
  .cyt-chart .dot, .cyt-chart .drop { transition: none; }
}
@media (max-width: 640px) {
  /* the chart scales down, so its text has to scale up */
  .cyt-chart .lbl { font-size: 17px; }
  .cyt-chart .lbl-axis { font-size: 18px; }
  .cyt-chart .lbl-q { font-size: 14px; }
  .cyt-chart-wrap { padding: 16px 12px; }
}

/* ---------- Ask five questions ---------- */
.fq-tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.fq-tab { font: inherit; font-size: 15px; cursor: pointer; display: flex; flex-direction: column; align-items: flex-start; gap: 2px; padding: 8px 12px; flex: 1 1 0; max-width: 200px; min-width: 0; border: 1px solid var(--hair-strong); border-radius: var(--r); background: var(--surface); color: var(--text); text-align: left; transition: transform .12s ease, box-shadow .12s ease; }
.fq-tab:hover { transform: translateY(-1px); box-shadow: 0 2px 6px rgba(0,0,0,.08); }
.fq-tab b { font-size: 16px; }
.fq-tab small { font-family: var(--mono); font-size: 12px; }
.fq-tab[aria-selected="true"] { border-color: var(--cool); box-shadow: inset 0 -3px 0 var(--cool); }
.fq-panel { border: 1px solid var(--hair); border-radius: var(--r); background: var(--surface); padding: 18px 20px 20px; }
.fq-sub { display: grid; gap: 4px; padding: 12px 14px; background: var(--sunk); border-radius: var(--r); margin-bottom: 16px; font-size: 14.5px; }
.fq-sub q { font-family: var(--serif); font-size: 16px; quotes: "“" "”"; color: var(--text); }
.fq-sub .k { color: var(--muted); font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
.fq-log { display: grid; gap: 10px; margin-bottom: 16px; }
.fq-empty { color: var(--muted); font-size: 15px; font-style: italic; margin: 0; }
.fq-msg { max-width: 88%; padding: 10px 14px; border-radius: 10px; font-size: 15.5px; line-height: 1.55; }
.fq-msg--you { justify-self: end; background: var(--cool-soft); border-bottom-right-radius: 2px; }
.fq-msg--them { justify-self: start; background: var(--sunk); border-bottom-left-radius: 2px; }
.fq-msg .who { display: block; font-family: var(--mono); font-size: 11.5px; color: var(--muted); margin-bottom: 2px; }
.fq-msg--doc { font-family: var(--mono); font-size: 13.5px; line-height: 1.6; background: var(--surface); border: 1px dashed var(--hair-strong); max-width: 100%; justify-self: stretch; }
.fq-msg--doc ul { margin: 4px 0 0; padding-left: 1.2em; }
.fq-note { display: block; margin-top: 8px; padding-top: 6px; border-top: 1px solid var(--hair); font-size: 13.5px; color: var(--text-2); font-style: italic; }
.fq-note::before { font-style: normal; font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; margin-right: 6px; }
.fq-note[data-s="strong"]::before { content: "telling"; color: var(--good); }
.fq-note[data-s="misleading"]::before { content: "misleading"; color: var(--bad); }
.fq-note[data-s="weak"]::before { content: "says little"; color: var(--warm); }
.fq-msg.is-new { animation: fq-in .35s ease both; }
.fq-msg--them.is-new, .fq-msg--doc.is-new { animation-delay: .3s; }
@keyframes fq-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .fq-msg.is-new { animation: none; } }
.fq-msg:focus { outline: none; }
.fq-msg:focus-visible { outline: 2px solid var(--warm); outline-offset: 2px; }
.fq-qs-h { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin: 0 0 8px; }
.fq-qs-h b { font-size: 15px; }
.fq-left { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.fq-qs { display: grid; gap: 6px; }
.fq-q { font: inherit; font-size: 15px; text-align: left; cursor: pointer; padding: 8px 12px; border: 1px solid var(--hair-strong); border-radius: var(--r); background: var(--bg); color: var(--text); transition: transform .12s ease, box-shadow .12s ease; }
.fq-q:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 2px 6px rgba(0,0,0,.08); }
.fq-q:disabled { cursor: default; opacity: 0.5; }
.fq-q[data-asked="true"] { opacity: 0.45; text-decoration: line-through; text-decoration-thickness: 1px; }
.fq-verdict { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--hair); }
.fq-verdict p { font-weight: 600; margin-bottom: 8px; }
.fq-debrief { margin-top: 28px; }
.fq-table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 12px 0 0; }
.fq-table th, .fq-table td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--hair); }
.fq-table th { font-family: var(--mono); font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 500; }
.fq-table td.n { font-family: var(--mono); color: var(--muted); white-space: nowrap; }
.fq-tag { display: inline-block; font-family: var(--mono); font-size: 11px; padding: 1px 6px; border-radius: 3px; text-transform: uppercase; letter-spacing: 0.05em; }
.fq-tag--prep { background: var(--bad-soft); color: var(--bad); }
.fq-tag--deep { background: var(--good-soft); color: var(--good); }
.fq-tag--mid { background: var(--warm-soft); color: var(--warm); }
@media (max-width: 640px) {
  .fq-table thead { display: none; }
  .fq-table tr { display: grid; grid-template-columns: 1fr; padding: 8px 0; border-bottom: 1px solid var(--hair); }
  .fq-table td { border: 0; padding: 2px 0; }
  .fq-msg { max-width: 100%; }
}

/* ---------- notes ---------- */
.obd-notes { font-family: var(--mono); font-size: 13.5px; line-height: 1.6; background: var(--surface); }

.obd-sources { margin-top: clamp(48px, 7vw, 72px); padding-top: 24px; border-top: 1px solid var(--hair); font-size: 14.5px; color: var(--text-2); }
.obd-sources h2 { font-size: 18px; }
.obd-sources ul { padding-left: 1.2em; }
.obd-sources li { margin-bottom: 6px; }
.obd-sources a { word-break: break-word; }

/* ---------- blueprint ---------- */
.obd-blueprint { align-self: start; }
.obd-blueprint summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px; font-weight: 650; }
.obd-blueprint summary::-webkit-details-marker { display: none; }
.obd-bp-mini { font-family: var(--mono); font-size: 12px; font-weight: 400; color: var(--muted); }
.obd-bp-body { display: grid; gap: 14px; font-size: 14.5px; }
.bp-k { font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 0 0 4px; }
.bp-title { font-weight: 650; font-size: 15.5px; margin: 0; line-height: 1.35; }
.bp-empty { color: var(--muted); font-style: italic; }
.bp-lane { display: inline-block; font-family: var(--mono); font-size: 12px; padding: 2px 8px; border-radius: var(--r); border: 1px solid var(--hair-strong); }
.bp-lane--open { border-color: var(--good); color: var(--good); }
.bp-lane--secured { border-color: var(--cool); color: var(--cool-ink); }
.bp-ev { display: grid; grid-template-columns: auto repeat(4, 1fr); gap: 4px 6px; align-items: center; font-size: 12px; }
.bp-ev .h { font-family: var(--mono); font-size: 10.5px; color: var(--muted); text-align: center; text-transform: uppercase; letter-spacing: 0.04em; }
.bp-ev .r { font-size: 12.5px; color: var(--text-2); padding-right: 4px; }
.bp-cell { height: 22px; border-radius: 3px; border: 1px dashed var(--hair-strong); }
.bp-cell.on { border: 0; background: var(--cool); }
.bp-cell.new { border: 0; background: var(--warm); }
.bp-meter { display: flex; gap: 3px; }
.bp-meter i { flex: 1; height: 8px; border-radius: 2px; background: var(--hair); }
.bp-meter i.on { background: var(--warm); }
.bp-small { font-size: 13px; color: var(--muted); margin: 4px 0 0; }
.bp-progress { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; font-size: 13.5px; }
.bp-progress li::before { content: "○"; margin-right: 8px; color: var(--muted); }
.bp-progress li.done::before { content: "●"; color: var(--cool); }
.bp-progress a { color: var(--text-2); text-decoration: none; }
.bp-progress a:hover { text-decoration: underline; }

@media (min-width: 1100px) {
  .obd-blueprint { position: sticky; top: 20px; margin-top: clamp(32px, 6vw, 56px); padding: 18px 18px 20px; background: var(--surface); border: 1px solid var(--hair); border-top: 4px solid var(--warm); border-radius: var(--r); max-height: calc(100vh - 40px); overflow: auto; }
  .obd-blueprint summary { pointer-events: none; margin-bottom: 14px; }
  .obd-bp-mini { display: none; }
}
@media (max-width: 1099.98px) {
  .obd-blueprint { position: fixed; left: 0; right: 0; bottom: 0; z-index: 10; background: var(--surface); border-top: 2px solid var(--warm); box-shadow: 0 -6px 18px rgba(0,0,0,.12); max-height: 75vh; overflow: auto; }
  .obd-blueprint summary { padding: 12px var(--pad); }
  .obd-blueprint summary::after { content: "▲"; font-size: 11px; color: var(--muted); }
  .obd-blueprint[open] summary::after { content: "▼"; }
  .obd-bp-body { padding: 0 var(--pad) 18px; }
  body { padding-bottom: 56px; }
}

@media print {
  .obd-blueprint, .seaeu-band, .obd-top, .obd-actions { display: none !important; }
  body { padding-bottom: 0; background: #fff; }
}

/* =========================================================
   Course frame: rail, pager, home, step pages
   ========================================================= */
.obd-top .obd-wrap { flex-wrap: wrap; }
.obd-rail { display: flex; flex-wrap: wrap; gap: 4px; font-family: var(--mono); font-size: 12.5px; }
.obd-rail a { position: relative; display: inline-flex; align-items: center; gap: 6px; padding: 5px 9px; border-radius: var(--r); text-decoration: none; color: var(--text-2); border: 1px solid transparent; }
.obd-rail a:hover { border-color: var(--hair-strong); }
.obd-rail a.is-done::after { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--warm); }
.obd-rail a[aria-current="page"] { background: var(--cool); color: #fff; }
.obd-rail a[aria-current="page"].is-done::after { background: #fff; }
@media (prefers-color-scheme: dark) { .obd-rail a[aria-current="page"] { color: #0d1416; } .obd-rail a[aria-current="page"].is-done::after { background: #0d1416; } }
@media (max-width: 720px) { .obd-home span { display: none; } }

.obd-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: clamp(40px, 6vw, 64px); }
.obd-pager a { display: grid; gap: 2px; padding: 14px 16px; border: 1px solid var(--hair); border-radius: var(--r); background: var(--surface); text-decoration: none; color: var(--text); transition: transform .12s ease, box-shadow .12s ease; }
.obd-pager a:hover { transform: translateY(-1px); box-shadow: 0 3px 8px rgba(0,0,0,.08); }
.obd-pager span { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.obd-pager b { font-size: 15.5px; line-height: 1.35; }
.obd-pager-next { text-align: right; grid-column: 2; }
@media (max-width: 560px) { .obd-pager { grid-template-columns: 1fr; } .obd-pager-next { grid-column: 1; } }

.obd-lede { font-size: 19px; color: var(--text-2); max-width: 40em; }
.obd-section h3 { margin: 24px 0 8px; }
.obd-section ul, .obd-section ol { padding-left: 1.3em; max-width: 40em; }
.obd-section li { margin: 4px 0; }

/* cards in a grid */
.obd-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 14px; margin: 18px 0; }
.obd-card { padding: 16px 18px; background: var(--surface); border: 1px solid var(--hair); border-top: 3px solid var(--cool); border-radius: var(--r); font-size: 15.5px; }
.obd-card h3 { margin: 0 0 6px; font-size: 16.5px; }
.obd-card p { margin: 0 0 6px; }
.obd-card p:last-child { margin-bottom: 0; }
.obd-card .src { font-size: 13.5px; color: var(--muted); }
.obd-card--warm { border-top-color: var(--warm); }
.obd-card--bad { border-top-color: var(--bad); }
.obd-card--good { border-top-color: var(--good); }
.obd-card--num h3::before { content: attr(data-n); display: inline-grid; place-items: center; width: 24px; height: 24px; margin-right: 8px; border-radius: 50%; background: var(--cool-soft); color: var(--cool-ink); font-family: var(--mono); font-size: 12.5px; }

/* two columns, side by side */
.obd-two { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 16px; margin: 18px 0; }

.obd-quote { margin: 28px 0; padding: 4px 0 4px 20px; border-left: 3px solid var(--warm); font-family: var(--serif); font-size: 19px; line-height: 1.55; color: var(--text); max-width: 36em; }
.obd-quote footer { font-family: var(--sans); font-size: 14px; color: var(--muted); margin-top: 6px; }

.obd-table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 16px 0; }
.obd-table th, .obd-table td { text-align: left; vertical-align: top; padding: 9px 10px; border-bottom: 1px solid var(--hair); }
.obd-table th { font-family: var(--mono); font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 500; }
.obd-table td:first-child { font-weight: 600; }
@media (max-width: 640px) {
  .obd-table thead { display: none; }
  .obd-table tr { display: grid; padding: 8px 0; border-bottom: 1px solid var(--hair); }
  .obd-table td { border: 0; padding: 2px 0; }
  .obd-table td[data-h]::before { content: attr(data-h) ": "; font-family: var(--mono); font-size: 11.5px; text-transform: uppercase; color: var(--muted); }
}

/* home: the course map */
.obd-map { list-style: none; padding: 0; margin: 18px 0; display: grid; gap: 10px; max-width: none; }
.obd-map li { margin: 0; }
.obd-map a { display: grid; grid-template-columns: 56px 1fr auto; gap: 4px 16px; align-items: start; padding: 14px 16px; border: 1px solid var(--hair); border-radius: var(--r); background: var(--surface); text-decoration: none; color: var(--text); transition: transform .12s ease, box-shadow .12s ease; }
.obd-map a:hover { transform: translateY(-1px); box-shadow: 0 3px 8px rgba(0,0,0,.08); }
.obd-map .n { grid-row: span 2; font-family: var(--mono); font-size: 13px; color: var(--cool-ink); padding-top: 3px; }
.obd-map .t { font-weight: 650; font-size: 16.5px; }
.obd-map .m { font-family: var(--mono); font-size: 12px; color: var(--muted); white-space: nowrap; padding-top: 4px; }
.obd-map .d { grid-column: 2 / 4; font-size: 15px; color: var(--text-2); }
@media (max-width: 560px) { .obd-map a { grid-template-columns: 44px 1fr; } .obd-map .m { grid-column: 2; padding-top: 0; } .obd-map .d { grid-column: 2; } }
.obd-map a.is-done .n::after { content: " ●"; color: var(--warm); }

.obd-credit { margin-top: 40px; font-size: 14px; color: var(--muted); max-width: 44em; }

/* a quiet inline label for "our view" */
.obd-ours { font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--warm); margin-right: 6px; }

/* a sorting / pick activity shared by several steps */
.obd-pick { display: grid; gap: 10px; }
.obd-pick-item { display: grid; gap: 8px; padding: 12px 14px; border: 1px solid var(--hair); border-radius: var(--r); background: var(--surface); }
.obd-pick-item p { margin: 0; font-size: 15.5px; }
.obd-pick-item .obd-choice span { font-size: 14px; padding: 5px 10px; }
.obd-pick-fb { font-size: 14.5px; padding: 8px 10px; border-radius: var(--r); background: var(--sunk); }
.obd-pick-fb b { margin-right: 4px; }
.obd-pick-fb.ok b { color: var(--good); }
.obd-pick-fb.no b { color: var(--bad); }

/* ---------- step 1: the detector's dilemma ---------- */
.det { border: 1px solid var(--hair); border-radius: var(--r); background: var(--surface); padding: 16px 18px 18px; }
.det-controls { display: grid; gap: 10px; margin-bottom: 14px; }
.det-sl { display: grid; gap: 2px; font-size: 14.5px; color: var(--text-2); }
.det-sl output { font-family: var(--mono); font-size: 13px; color: var(--text); margin-left: 6px; }
.det-sl input[type=range] { width: 100%; accent-color: var(--cool); }
.det-grid { display: block; width: 100%; max-width: 520px; height: auto; margin: 0 auto; }
.det-grid .k-ai { fill: var(--text-2); }
.det-grid .k-h1 { fill: var(--surface); stroke: var(--muted); stroke-width: 1.5; }
.det-grid .k-h2 { fill: var(--cool-soft); stroke: var(--cool); stroke-width: 1.5; }
.det-grid .ring { fill: none; stroke: var(--bad); stroke-width: 2.5; opacity: 0; transition: opacity .25s ease; }
.det-grid .ring.on { opacity: 1; }
.det-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; justify-content: center; font-size: 13.5px; color: var(--text-2); margin: 10px 0 6px; }
.det-legend span { display: inline-flex; align-items: center; gap: 6px; }
.det-legend i { display: inline-block; width: 12px; height: 12px; border-radius: 50%; }
.det-legend .k-ai { background: var(--text-2); }
.det-legend .k-h1 { border: 1.5px solid var(--muted); }
.det-legend .k-h2 { background: var(--cool-soft); border: 1.5px solid var(--cool); }
.det-legend .k-fl { border: 2.5px solid var(--bad); width: 14px; height: 14px; }
.det-out { font-size: 15.5px; margin: 8px 0 0; }
.det-ppv { display: block; margin-top: 4px; }
@media (prefers-reduced-motion: reduce) { .det-grid .ring { transition: none; } }

/* ---------- step 2: two strands ---------- */
.br { border: 1px solid var(--hair); border-radius: var(--r); background: var(--surface); padding: 16px 18px 18px; }
.br-fig { margin-bottom: 14px; }
.br-svg { display: block; width: 100%; height: auto; }
.br-svg .st { fill: none; stroke-linecap: round; transition: stroke-width .45s ease; }
.br-svg .st.s { stroke: var(--cool); }
.br-svg .st.a { stroke: var(--warm); }
.br-svg .st.zero { stroke-dasharray: 3 5; opacity: 0.55; }
.br-svg .st.none { stroke: var(--hair-strong); stroke-width: 1.5px; stroke-dasharray: 2 5; }
.br-svg .lb { fill: var(--text-2); font-family: var(--mono); font-size: 13px; }
.br-svg .lb.off { fill: var(--muted); opacity: 0.6; }
.br-legend { display: flex; flex-wrap: wrap; gap: 6px 18px; justify-content: center; margin: 6px 0 0; font-size: 14px; color: var(--text-2); }
.br-legend span { display: inline-flex; align-items: center; gap: 8px; }
.br-legend i { display: inline-block; width: 22px; height: 6px; border-radius: 3px; }
.br-legend .ls { background: var(--cool); }
.br-legend .la { background: var(--warm); }
.br-roles { list-style: none; margin: 0 0 14px; padding: 0; max-width: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 8px; }
.br-roles li { margin: 0; padding: 8px 10px; border-left: 3px solid var(--cool); background: var(--bg); font-size: 14px; line-height: 1.45; color: var(--text-2); }
.br-roles b { display: block; margin-bottom: 2px; font-size: 14.5px; color: var(--text); }
.br-stages { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; max-width: none; }
.br-stage { margin: 0; padding: 12px 14px; border: 1px solid var(--hair); border-radius: var(--r); background: var(--bg); }
.br-h { display: flex; align-items: center; gap: 10px; margin: 0 0 2px; }
.br-h span { display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; background: var(--cool-soft); color: var(--cool-ink); font-family: var(--mono); font-size: 12.5px; flex-shrink: 0; }
.br-h b { font-size: 16px; }
.br-d { margin: 0 0 10px 34px; font-size: 14.5px; color: var(--text-2); }
.br-stage .obd-choice { margin-left: 34px; }
.br-stage .obd-choice span { font-size: 14px; padding: 6px 10px; }
.br-fb { margin: 10px 0 0 34px; padding: 10px 12px; border-radius: var(--r); background: var(--surface); border: 1px solid var(--hair); font-size: 14.5px; }
.br-fb p { margin: 0 0 6px; }
.br-fb p:last-child { margin-bottom: 0; }
.br-k b { font-family: var(--mono); font-size: 11px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.06em; color: var(--warm); margin-right: 6px; }
.br-wait { font-family: var(--mono); font-size: 13px; color: var(--muted); margin: 12px 0 0; }
@media (max-width: 560px) { .br-d, .br-stage .obd-choice, .br-fb { margin-left: 0; } }
@media (prefers-reduced-motion: reduce) { .br-svg .st { transition: none; } }

/* ---------- step 3: windows into the box ---------- */
.win { border: 1px solid var(--hair); border-radius: var(--r); background: var(--surface); padding: 16px 18px 18px; }
.win-box-wrap { text-align: center; margin-bottom: 14px; }
.win-box { display: block; width: 100%; max-width: 360px; height: auto; margin: 0 auto; }
.win-box .b { fill: #1d2a31; }
.win-box .slot rect { fill: #2c3a42; stroke: #3d4c55; stroke-width: 1; transition: fill .5s ease; }
.win-box .slot.open rect { fill: #f3d9a8; stroke: #e0a24a; }
.win-box .slot text { fill: #f3f0e8; font-family: var(--mono); font-size: 10.5px; }
.win-box .lbl { fill: #93a2a9; font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; }
.win-count { font-family: var(--mono); font-size: 13px; color: var(--muted); margin: 6px 0 0; }
.win .fq-tab { flex: 1 1 0; }
.win .fq-tab b { font-size: 14px; }
.win-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr)); gap: 10px; }
.win-card { font: inherit; text-align: left; cursor: pointer; display: grid; gap: 4px; align-content: start; padding: 12px 14px; border: 1px solid var(--hair-strong); border-radius: var(--r); background: var(--bg); color: var(--text); transition: transform .12s ease, box-shadow .12s ease; }
.win-card:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 3px 8px rgba(0,0,0,.08); }
.win-card:disabled { opacity: 0.5; cursor: default; }
.win-card b { font-size: 15.5px; }
.win-card span { font-size: 13.5px; color: var(--text-2); line-height: 1.45; }
.win-card span i { font-style: normal; font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); margin-right: 4px; }
.win-card em { font-style: normal; font-family: var(--mono); font-size: 12px; color: var(--cool-ink); margin-top: 4px; }
.win-card.is-on { border-color: var(--warm); box-shadow: inset 0 0 0 1px var(--warm); background: var(--warm-soft); }
.win-card.is-on em { color: var(--warm); }
@media (prefers-reduced-motion: reduce) { .win-box .slot rect { transition: none; } }
@media (max-width: 560px) { .win .fq-tabs { flex-wrap: wrap; } .win .fq-tab { flex: 1 1 40%; max-width: none; } }

/* ---------- step 3: fix the AI answer ---------- */
.fix { border: 1px solid var(--hair); border-radius: var(--r); background: var(--surface); padding: 16px 18px 18px; }
.fix-meta { font-family: var(--mono); font-size: 12px; color: var(--muted); margin: 0 0 10px; }
.fix-text { font-family: var(--serif); font-size: 17px; line-height: 1.7; margin-bottom: 12px; }
.fix-s { font: inherit; color: inherit; background: none; border: 0; padding: 1px 2px; margin: 0; text-align: left; cursor: pointer; display: inline; border-radius: 3px; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
.fix-s:hover:not(:disabled) { background: var(--sunk); }
.fix-s.is-flag { background: var(--bad-soft); text-decoration: line-through; text-decoration-color: var(--bad); text-decoration-thickness: 1.5px; }
.fix-s:disabled { cursor: default; }
.fix-s.is-hit { background: var(--good-soft); text-decoration: line-through; text-decoration-color: var(--bad); }
.fix-s.is-miss { background: var(--bad-soft); text-decoration: underline wavy var(--bad); }
.fix-s.is-false { background: var(--warm-soft); text-decoration: none; }
.fix-list { margin: 8px 0 0; padding-left: 1.3em; font-size: 15px; }
.fix-list li { margin-bottom: 8px; }
.fix-list span { color: var(--text-2); }

.obd-choice--stack { flex-direction: column; align-items: stretch; }
.obd-choice--stack span { display: block; text-align: left; line-height: 1.45; }

/* ---------- step 5: the Swiss cheese stack ---------- */
:root { --cheese: #f0d189; --cheese-edge: #d6ae55; }
@media (prefers-color-scheme: dark) { :root { --cheese: #6e5822; --cheese-edge: #8f7230; } }
.ch { border: 1px solid var(--hair); border-radius: var(--r); background: var(--surface); padding: 16px 18px 18px; }
.ch-pick { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.ch-btn { font: inherit; font-size: 14px; cursor: pointer; display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; border: 1px solid var(--hair-strong); border-radius: var(--r); background: var(--bg); color: var(--text); transition: transform .12s ease, box-shadow .12s ease; }
.ch-btn:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 2px 6px rgba(0,0,0,.08); }
.ch-btn:disabled { opacity: 0.45; cursor: default; }
.ch-btn.is-on { background: var(--cheese); border-color: var(--cheese-edge); color: #3a2e10; }
.ch-btn i { font-style: normal; font-family: var(--mono); font-size: 11.5px; display: inline-grid; place-items: center; width: 18px; height: 18px; border-radius: 50%; background: #3a2e10; color: var(--cheese); }
.ch-empty { color: var(--muted); font-style: italic; margin: 0 0 8px; }
.ch-stack { display: grid; gap: 10px; }
.ch-row { display: grid; grid-template-columns: minmax(0, 1fr) 96px; column-gap: 10px; align-items: center; }
.ch-a { grid-column: 1 / -1; margin: 0 0 3px; font-size: 13.5px; font-weight: 600; color: var(--text-2); }
.ch-cells { position: relative; display: flex; gap: 6px; height: 34px; }
.ch-c { flex: 1; border-radius: 4px; background: var(--cheese); border: 1px solid var(--cheese-edge); }
.ch-c.hole { background: radial-gradient(circle at 50% 50%, var(--surface) 0 9px, var(--cheese) 10px); }
.ch-beam { position: absolute; left: 0; top: 50%; height: 4px; margin-top: -2px; border-radius: 2px; background: var(--cool); z-index: 1; transition: width .8s cubic-bezier(.3,.7,.2,1); }
.ch-beam.slips { background: var(--bad); }
.ch-beam.slips::after { content: ""; position: absolute; right: -6px; top: -4px; border: 6px solid transparent; border-left: 8px solid var(--bad); border-right: 0; }
.ch-res { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.ch-res.slips { color: var(--bad); font-weight: 600; }
.ch-head .ch-cells { height: auto; align-items: end; }
.ch-h { flex: 1; font-size: 11.5px; line-height: 1.25; color: var(--muted); }
.ch-sum { margin: 14px 0 0; font-size: 15px; }
@media (prefers-reduced-motion: reduce) { .ch-beam { transition: none; } }
@media (max-width: 560px) { .ch-row { grid-template-columns: minmax(0, 1fr) 70px; } .ch-res { font-size: 11px; } }

/* ---------- step 5: the grade label ---------- */
.gl { margin-top: 12px; max-width: 420px; border: 2px solid var(--text); border-radius: var(--r); padding: 12px 16px 14px; background: var(--surface); }
.gl-h { font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em; margin: 0; padding-bottom: 6px; border-bottom: 6px solid var(--text); }
.gl-course { font-weight: 700; font-size: 16.5px; margin: 8px 0 6px; line-height: 1.3; }
.gl dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; margin: 0; font-size: 14.5px; }
.gl dt { font-weight: 700; border-top: 1px solid var(--hair-strong); padding-top: 6px; }
.gl dd { margin: 0; border-top: 1px solid var(--hair-strong); padding-top: 6px; }
.gl-ev { display: inline-block; font-family: var(--mono); font-size: 11.5px; padding: 1px 6px; margin: 0 4px 4px 0; border-radius: 3px; border: 1px dashed var(--hair-strong); color: var(--muted); }
.gl-ev.on { border: 1px solid var(--cool); background: var(--cool-soft); color: var(--cool-ink); }
.gl-empty { color: var(--muted); font-style: italic; }

/* ---------- step 6: you can't have it all ---------- */
.tr { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 300px); gap: 18px; align-items: center; border: 1px solid var(--hair); border-radius: var(--r); background: var(--surface); padding: 16px 18px 18px; }
@media (max-width: 640px) { .tr { grid-template-columns: 1fr; } }
.tr-sliders { display: grid; gap: 12px; }
.tr-sl { display: grid; gap: 2px; }
.tr-sl > span { font-size: 15px; }
.tr-sl output { font-family: var(--mono); font-size: 12.5px; color: var(--cool-ink); margin-left: 6px; }
.tr-sl small { display: block; font-size: 13px; }
.tr-sl input[type=range] { width: 100%; accent-color: var(--cool); }
.tr-left { font-family: var(--mono); font-size: 13px; color: var(--warm); margin: 2px 0 0; }
.tr-radar { width: 100%; max-width: 300px; height: auto; margin: 0 auto; display: block; }
.tr-radar .g { fill: none; stroke: var(--hair-strong); stroke-width: 1; }
.tr-radar #tr-poly { fill: var(--cool); fill-opacity: 0.25; stroke: var(--cool); stroke-width: 2; transition: all .3s ease; }
.tr-radar text { fill: var(--text-2); font-family: var(--sans); font-size: 12px; }
.tr-read { margin: 12px 0 0; font-size: 15.5px; }

/* ---------- Go deeper pages ---------- */
.obd-box ol, .obd-box ul { margin: 0 0 10px; padding-left: 1.3em; font-size: 15.5px; }
.obd-deeper { margin: 28px 0 0; padding: 14px 18px; border: 1px dashed var(--cool); border-radius: var(--r); background: var(--surface); max-width: 40em; }
.obd-deeper .obd-kicker { margin: 0 0 4px; }
.obd-deeper p { margin: 0; font-size: 15.5px; }
.obd-deeper p + p { margin-top: 6px; }
.obd-deeper a { font-weight: 600; }
.obd-hero .obd-meta + .obd-quiet { margin-top: 12px; }