/* === MaD Physics landing page === */

:root {
  --text: #111827;
  --text-soft: #374151;
  --muted: #6b7280;
  --link: #1d4ed8;
  --link-hover: #1e40af;
  --accent: #1d4ed8;
  --accent-soft: #eff6ff;
  --accent-line: #c7d2fe;
  --border: #e5e7eb;
  --border-soft: #f1f5f9;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-tint: #fafbfc;
  --code-bg: #0b1020;
  --code-fg: #e5e7eb;
  --max-width: 1080px;

  --font-sans: "Google Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-display: "Google Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "Roboto Mono", ui-monospace, "SF Mono", SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.15s;
}
a:hover { color: var(--link-hover); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}

/* === Hero === */
.hero {
  padding: 80px 0 48px;
  text-align: center;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 2.5rem);
  line-height: 1.2;
  margin: 0 0 14px;
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--text);
}
.hero h1 .name {
  color: var(--text);
  font-variant: small-caps;
  font-weight: 700;
  letter-spacing: 0.005em;
}

.hero .subtitle {
  font-size: 1.05rem;
  color: var(--muted);
  margin: 0 auto 28px;
  max-width: 720px;
}

.authors {
  font-size: 0.98rem;
  margin: 22px auto 6px;
  max-width: 820px;
  color: var(--text-soft);
  line-height: 1.9;
}
.authors .author { white-space: nowrap; margin: 0 2px; }
.authors sup { color: var(--muted); font-size: 0.78em; margin-left: 1px; }

.affils {
  font-size: 0.92rem;
  color: var(--muted);
  margin: 6px auto 0;
  max-width: 820px;
}
.affils sup { margin-right: 4px; }
.correspondence {
  font-size: 0.86rem;
  color: var(--muted);
  margin-top: 10px;
}
.correspondence a { color: var(--text-soft); border-bottom: 1px dashed var(--border); }
.correspondence a:hover { color: var(--accent); border-color: var(--accent); }

/* Buttons */
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin: 32px 0 8px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  background: var(--text);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.93rem;
  font-weight: 500;
  border: 1px solid var(--text);
  transition: background 0.15s ease, transform 0.08s ease;
}
.btn:hover { background: #1f2937; color: #fff; }
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
}
.btn.primary:hover { background: var(--link-hover); border-color: var(--link-hover); }
.btn.disabled {
  background: #f3f4f6;
  color: #9ca3af;
  border-color: var(--border);
  cursor: not-allowed;
}
.btn.disabled:hover { background: #f3f4f6; transform: none; }
.btn svg { width: 16px; height: 16px; }

/* === Sections === */
section { padding: 64px 0; }
section + section { border-top: 1px solid var(--border-soft); }
section.tinted { background: var(--bg-tint); }

.section-eyebrow {
  display: block;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.4vw, 1.75rem);
  margin: 0 0 16px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text);
}
section h3 {
  font-family: var(--font-display);
  font-size: 1.18rem;
  margin: 28px 0 8px;
  font-weight: 500;
  letter-spacing: -0.005em;
}
section p {
  margin: 0 0 14px;
  color: var(--text-soft);
}
.lead {
  font-size: 1.05rem;
  color: var(--text);
}

/* === Teaser === */
.teaser {
  padding: 48px 0 32px;
  text-align: center;
}
.teaser img {
  display: inline-block;
  max-width: 540px;
  width: 100%;
  height: auto;
}
.caption {
  font-size: 0.92rem;
  color: var(--muted);
  margin: 18px auto 0;
  max-width: 720px;
  text-align: left;
  line-height: 1.6;
}

/* === Environments (no cards — flat) === */
.env-block {
  padding: 28px 0;
  margin: 0;
  border-top: 1px solid var(--border-soft);
}
.env-block:first-of-type { border-top: 1px solid var(--border-soft); margin-top: 8px; }

.env-block .head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 6px;
  flex-wrap: wrap;
}
.env-block h3 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 500;
  font-family: var(--font-display);
}
.env-block .tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 600;
}
.env-block .desc {
  color: var(--text-soft);
  margin: 4px 0 18px;
  max-width: 760px;
}

.video-grid {
  display: flex;
  flex-wrap: nowrap;
  gap: 12px;
  margin: 8px 0 0;
}
.video-item {
  margin: 0;
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.video-item figcaption {
  font-size: 0.78rem;
  color: var(--text-soft);
  margin-top: 8px;
  line-height: 1.45;
  text-align: left;
}
.video-item figcaption strong {
  color: var(--text);
  font-weight: 600;
}

.video-frame {
  width: 100%;
}
.video-frame video {
  display: block;
  width: 100%;
  height: auto;
}

@media (max-width: 720px) {
  .video-grid { flex-wrap: wrap; }
  .video-item { flex: 1 1 180px; }
  .video-item figcaption { font-size: 0.85rem; }
}

/* === Results tables === */
.results-table-wrap {
  margin: 16px 0 28px;
  overflow-x: auto;
}
table.results {
  width: auto;
  margin: 0 auto;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 0.84rem;
  font-variant-numeric: tabular-nums;
}
table.results caption {
  text-align: left;
  padding: 0 0 10px;
  font-weight: 500;
  font-size: 0.92rem;
  caption-side: top;
  color: var(--text);
  font-family: var(--font-display);
}
table.results th, table.results td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--border-soft);
  text-align: right;
  white-space: nowrap;
}
table.results th:first-child, table.results td:first-child,
table.results th.left, table.results td.left {
  text-align: left;
}
table.results thead th {
  border-bottom: 1px solid var(--border);
  border-top: 1px solid var(--border);
  font-weight: 500;
  color: var(--text-soft);
  font-size: 0.83rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
table.results thead .group {
  text-align: center;
  font-weight: 500;
}
table.results tbody tr:last-child td { border-bottom: 1px solid var(--border); }
table.results tbody tr.model-start td { border-top: 1px solid var(--border); }
table.results tbody tr:hover td { background: var(--bg-soft); }
table.results td.best {
  color: var(--accent);
  font-weight: 700;
}
table.results .model-name { font-weight: 500; color: var(--text); }
.results-note {
  font-size: 0.86rem;
  color: var(--muted);
  margin: -4px 0 22px;
  padding: 0 0 0 14px;
  border-left: 2px solid var(--accent);
}

/* === Highlight figures (no cards — flat grid) === */
.figure-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px 36px;
  margin-top: 20px;
}
.figure-grid figure {
  margin: 0;
}
.figure-grid img {
  width: 100%;
  max-width: 360px;
  height: auto;
  display: block;
  margin: 0 auto 12px;
}
.figure-grid figcaption {
  font-size: 0.88rem;
  color: var(--text-soft);
  text-align: left;
  line-height: 1.55;
}
@media (max-width: 720px) {
  .figure-grid { grid-template-columns: 1fr; }
}

/* === Benchmark feature list === */
.features {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 32px;
}
.features li {
  position: relative;
  padding-left: 18px;
  color: var(--text-soft);
  font-size: 0.95rem;
  line-height: 1.55;
}
.features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}
.features li strong {
  color: var(--text);
  font-weight: 600;
}
@media (max-width: 720px) {
  .features { grid-template-columns: 1fr; }
}

/* === Variants in a single row === */
.variants-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 18px;
  align-items: start;
}
.variants-grid .variant h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}
.variants-grid .variant p {
  font-size: 0.86rem;
  line-height: 1.5;
  margin: 0 0 12px;
}
.variants-grid .variant img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}
.variants-grid .results-table-wrap {
  margin: 0;
}
.variants-grid table.results {
  font-size: 0.74rem;
  width: 100%;
}
.variants-grid table.results th,
.variants-grid table.results td {
  padding: 4px 6px;
}
.variants-grid table.results caption {
  font-size: 0.82rem;
  padding-bottom: 8px;
}
@media (max-width: 720px) {
  .variants-grid { grid-template-columns: 1fr; }
}

/* === BibTeX === */
pre.bibtex {
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 0.84rem;
  line-height: 1.6;
  font-family: var(--font-mono);
}

/* === Footer === */
footer {
  padding: 36px 0 56px;
  text-align: center;
  font-size: 0.86rem;
  color: var(--muted);
  border-top: 1px solid var(--border-soft);
}
footer a { color: var(--text-soft); }
footer a:hover { color: var(--accent); }

/* === Mobile === */
@media (max-width: 720px) {
  .hero { padding: 56px 0 32px; }
  section { padding: 48px 0; }
  .container { padding: 0 20px; }
}