/* Observatory of Behavioral Mechanics — design system (kit)
 * Dark "instrument console". Palette + type + exhibit components.
 * TODO before publish:
 *   - self-host IBM Plex Serif into /fonts and add @font-face (currently falls back to Georgia)
 *   - replace favicon with an OBM mark (currently reuses BIC's)
 */

:root {
  --navy: #0B1322;       /* page ground            */
  --surface: #131C30;    /* the apparatus figure   */
  --canvas: #0A1322;     /* sim background         */
  --ink: #E6ECF5;        /* primary text           */
  --soft: #D4DCEA;       /* body text              */
  --secondary: #8A97AD;  /* captions, limitations  */
  --hairline: #243149;   /* rules / borders        */
  --grid: #1B2740;       /* interior rules / grid  */
  --signal: #4DA9FF;     /* energy / interaction   */
  --amber: #F2B45A;      /* second body            */
  --radius: 4px;
  --sans: 'IBM Plex Sans', ui-sans-serif, system-ui, sans-serif;
  --serif: 'IBM Plex Serif', Georgia, 'Times New Roman', serif;
  --mono: 'IBM Plex Mono', ui-monospace, Menlo, monospace;
}

@font-face { font-family: 'IBM Plex Sans'; src: url('../fonts/ibm-plex-sans.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('../fonts/ibm-plex-mono-300.woff2') format('woff2'); font-weight: 300; font-style: normal; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('../fonts/ibm-plex-mono-400.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('../fonts/ibm-plex-mono-500.woff2') format('woff2'); font-weight: 500; font-style: normal; font-display: swap; }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--navy);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.obm-page { max-width: 720px; margin: 0 auto; padding: 54px 22px 80px; }

/* ---- header ---- */
.obm-masthead {
  font-family: var(--mono); font-size: 11px; letter-spacing: .09em;
  color: var(--secondary); display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px;
}
.obm-masthead .sep { opacity: .5; }
.obm-question {
  font-family: var(--sans); font-weight: 400; font-size: 33px; line-height: 1.18;
  letter-spacing: -0.01em; margin: 0 0 8px; color: var(--ink);
}
.obm-designation {
  font-family: var(--serif); font-style: italic; font-size: 16px;
  color: var(--secondary); margin: 0 0 22px;
}
.obm-framing { font-size: 18px; margin: 0 0 26px; color: var(--soft); }

/* ---- the apparatus figure ---- */
.obm-figure {
  margin: 0 0 28px; background: var(--surface); border: 1px solid var(--hairline);
  border-radius: var(--radius); box-shadow: 0 6px 24px rgba(0,0,0,.28); overflow: hidden;
}
.obm-stage { line-height: 0; }
.obm-canvas { display: block; width: 100%; height: 240px; }
.obm-controls { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding: 14px 16px 6px; }
.obm-btn {
  font-family: var(--mono); font-size: 12px; letter-spacing: .02em; font-weight: 500;
  background: var(--signal); color: #06101F; border: none; border-radius: var(--radius);
  padding: 9px 15px; cursor: pointer;
}
.obm-btn:hover { background: #6BB8FF; }
.obm-btn:focus-visible { outline: 2px solid #BFE0FF; outline-offset: 2px; }
.obm-help { font-family: var(--mono); font-size: 11px; color: var(--secondary); }
.obm-trans {
  font-family: var(--serif); font-size: 14.5px; color: #C7D0DF; padding: 12px 16px; margin: 6px 0 0;
  border-top: 1px solid var(--grid); transition: opacity .3s ease; min-height: 1.3em;
}
.obm-trans b { color: var(--signal); font-weight: 400; }
.obm-read { display: grid; grid-template-columns: 1fr 1fr; gap: 11px 18px; padding: 12px 16px 16px; border-top: 1px solid var(--grid); }
.obm-meter-lab { font-family: var(--mono); font-size: 10px; letter-spacing: .04em; color: var(--secondary); display: flex; justify-content: space-between; margin-bottom: 5px; }
.obm-bar { height: 5px; border-radius: 3px; background: #16203A; overflow: hidden; }
.obm-bar > i { display: block; height: 100%; border-radius: 3px; width: 0; }
.obm-coup { grid-column: 1 / -1; display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 9.5px; letter-spacing: .04em; color: var(--secondary); margin-top: 3px; }
.obm-coup input[type=range] { flex: 1; min-width: 0; accent-color: var(--signal); }
.obm-clamp { border: 1px solid var(--hairline); border-radius: 3px; padding: 2px 5px; font-size: 9px; opacity: .8; }

/* ---- findings ---- */
.obm-slab { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; color: var(--secondary); margin: 26px 0 8px; }
.obm-finding { font-size: 17px; line-height: 1.5; border-left: 2px solid var(--signal); padding: 2px 0 2px 14px; margin: 0; }
.obm-finding b { font-weight: 600; }
.obm-limit { font-size: 15.5px; line-height: 1.55; color: var(--secondary); margin: 0; }

/* ---- demoted full study ---- */
.obm-filing { margin: 30px 0 0; border-top: 1px solid var(--hairline); padding-top: 14px; }
.obm-filing summary { font-family: var(--mono); font-size: 11px; letter-spacing: .04em; color: var(--secondary); cursor: pointer; list-style: none; }
.obm-filing summary::-webkit-details-marker { display: none; }
.obm-filing summary::before { content: ""; display: inline-block; width: 0; height: 0; border-style: solid; border-width: 4px 0 4px 6px; border-color: transparent transparent transparent currentColor; margin-right: 8px; vertical-align: middle; transition: transform .15s ease; }
.obm-filing[open] summary::before { transform: rotate(90deg); }
.obm-filing[open] summary { color: var(--ink); }
.obm-filing .body { font-size: 15.5px; line-height: 1.6; color: #C7D0DF; margin-top: 14px; }
.obm-filing .body h3 { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; color: var(--secondary); margin: 18px 0 6px; font-weight: 500; }
.obm-filing .body p { margin: 0 0 12px; }

/* ---- footer ---- */
.obm-foot { font-family: var(--mono); font-size: 10px; letter-spacing: .05em; color: var(--secondary); margin-top: 40px; padding-top: 14px; border-top: 1px solid var(--hairline); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.obm-foot a { color: var(--secondary); }

@media (prefers-reduced-motion: reduce) { .obm-trans { transition: none; } }
@media (max-width: 520px) {
  .obm-question { font-size: 27px; }
  .obm-page { padding: 38px 16px 60px; }
  .obm-read { grid-template-columns: 1fr; }
}

/* ============================================================
 * Hub feed (obm/index.html) — the live instrument floor.
 * One serif line up top (the credo); all other chrome is mono.
 * ============================================================ */
.obm-hub-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 18px; flex-wrap: wrap; margin: 0 0 36px; }
.obm-hub-id { display: flex; align-items: center; gap: 13px; }
.obm-logo { width: 34px; height: 34px; flex: none; display: block; }
.obm-hub-mark { margin: 0; font-family: var(--mono); font-weight: 400; font-size: 12px; letter-spacing: .09em; color: var(--secondary); }
.obm-hub-credo { margin: 4px 0 0; font-family: var(--serif); font-size: 18px; line-height: 1.25; color: var(--ink); }
.obm-seal { font-family: var(--mono); font-size: 10px; letter-spacing: .06em; line-height: 1.8; color: var(--secondary); text-align: right; white-space: nowrap; }

.obm-feed-section + .obm-feed-section { border-top: 1px solid var(--hairline); margin-top: 40px; padding-top: 38px; }
.obm-hub-label { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; color: var(--secondary); margin: 0 0 9px; }
.obm-more { font-family: var(--mono); font-size: 12px; letter-spacing: .02em; color: var(--signal); text-decoration: none; display: inline-block; margin: 14px 0 0; }
.obm-more:hover { color: #6BB8FF; }
.obm-more:focus-visible { outline: 2px solid #BFE0FF; outline-offset: 2px; }

.obm-hub-foot { font-family: var(--mono); font-size: 10px; letter-spacing: .04em; line-height: 1.8; color: var(--secondary); margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--hairline); }
.obm-hub-foot p { margin: 0 0 6px; }
.obm-hub-foot p:last-child { margin-bottom: 0; }
.obm-hub-foot a { color: var(--secondary); }
.obm-hub-foot a:hover { color: var(--soft); }

@media (max-width: 520px) {
  .obm-seal { text-align: left; white-space: normal; }
}