/* pico-JEPA v2 — project page
   Tokens follow the lab's data-viz palette: surfaces, text ink, one accent
   (categorical slot 1) and the fixed status roles. Dark mode is selected,
   not an automatic flip. */

:root {
  color-scheme: light;
  --surface-1: #fcfcfb;
  --surface-2: #f3f3f1;
  --border: #dcdbd6;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #76756f;
  --accent: #2a78d6;
  --status-good: #0ca30c;
  --status-critical: #d03b3b;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --surface-1: #1a1a19;
    --surface-2: #232322;
    --border: #3a3a38;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #96958c;
    --accent: #3987e5;
    --status-good: #0ca30c;
    --status-critical: #d03b3b;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-1: #1a1a19;
  --surface-2: #232322;
  --border: #3a3a38;
  --text-primary: #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted: #96958c;
  --accent: #3987e5;
  --status-good: #0ca30c;
  --status-critical: #d03b3b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--surface-1);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 16px 72px;
}

a { color: var(--accent); }

/* ---- Header ---------------------------------------------------------- */

header {
  text-align: center;
  padding: 56px 0 8px;
}

h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 4px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin: 0 0 24px;
}

.authors {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

.affiliation,
.venue {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0 0 4px;
}

.venue strong { color: var(--text-primary); }

/* ---- Button row ------------------------------------------------------ */

.buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 28px 0 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: border-color 0.15s, transform 0.15s;
}

.btn:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.btn svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
  flex: none;
}

/* ---- Sections -------------------------------------------------------- */

section { margin-top: 48px; }

h2 {
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 1.05rem;
  margin: 28px 0 8px;
}

p { margin: 0 0 14px; }

.lead { font-size: 1.02rem; }

/* ---- Stat tiles ------------------------------------------------------ */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: 24px 0 8px;
}

.stat {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
}

.stat .value {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
  display: block;
}

.stat.hero .value {
  font-size: 3rem;
  color: var(--status-good);
}

.stat .label {
  display: block;
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ---- Figure ---------------------------------------------------------- */

figure {
  margin: 28px 0;
}

/* Bar chart. One series, so one accent hue and no legend — the title names it.
   Identity never rests on color: every bar is directly labelled and the full
   table sits below. Reference line = the single model. */

.chart {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 20px 14px;
  background: var(--surface-2);
  --ref: 48.6%; /* 6.80% of the 14% axis maximum */
}

.chart-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 18px;
}

.chart .row { margin-bottom: 16px; }

.row-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 12px;
  margin-bottom: 5px;
}

.row-head .name {
  font-size: 0.9rem;
  font-weight: 500;
}

.row-head .ann {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.track {
  position: relative;
  height: 20px;
}

.bar {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background: var(--accent);
  border-radius: 0 4px 4px 0;
}

/* Every bar is longer than the reference, so the line always falls on a filled
   bar — a surface-colored dash reads as a crisp notch in both modes. */
.refline {
  position: absolute;
  left: var(--ref);
  top: 0;
  bottom: 0;
  border-left: 2px dashed var(--surface-2);
}

.track .val {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  margin-left: 8px;
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
  white-space: nowrap;
}

.chart-foot {
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 7px;
}

.ref-key {
  width: 18px;
  height: 10px;
  flex: none;
  background: var(--accent);
  border-radius: 2px;
  position: relative;
}

.ref-key::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  border-left: 2px dashed var(--surface-2);
}

figcaption {
  margin-top: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ---- Tables ---------------------------------------------------------- */

.table-scroll {
  overflow-x: auto;
  margin: 18px 0 6px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
}

.table-note {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin: 18px 0 8px;
}

th, td {
  padding: 9px 12px;
  text-align: right;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th:first-child, td:first-child {
  text-align: left;
  font-variant-numeric: normal;
}

thead th {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border);
}

tbody tr.highlight td { font-weight: 600; }

.verdict {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.verdict.good { color: var(--status-good); }
.verdict.bad { color: var(--status-critical); }
.verdict.none { color: var(--text-muted); }

/* ---- BibTeX ---------------------------------------------------------- */

pre {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.5;
  margin: 0;
}

code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

/* ---- Footer ---------------------------------------------------------- */

footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

footer p { margin: 0 0 6px; }

@media (max-width: 600px) {
  body { font-size: 16px; }
  header { padding-top: 36px; }
  .stat.hero .value { font-size: 2.5rem; }
}