/* Multi-Future Drafting project page. Palette shared with the paper's figures. */
:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --fg: #1d1f23;
  --muted: #5b6068;
  --faint: #8a8f98;
  --card: #ffffff;
  --border: #e3e6ea;
  --rule: #c9cdd3;
  --accent: #6b3fa0;
  --accent-ink: #ffffff;
  --accent-soft: #efe8f7;
  --blue: #2563a8;
  --blue-l: #dbe8f6;
  --orange: #d9731a;
  --orange-l: #fbe6d3;
  --red: #c62828;
  --red-l: #fbe3e3;
  --green: #1b7a3d;
  --green-l: #dff3e6;
  --shadow: 0 1px 2px rgba(20, 24, 40, .05), 0 8px 24px rgba(20, 24, 40, .06);
  --radius: 14px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --serif: "Tinos", "Times New Roman", Times, serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111317; --bg-soft: #171a20; --fg: #e8eaee; --muted: #a3a9b4; --faint: #7d838e;
    --card: #181b21; --border: #2a2f38; --rule: #3a404b;
    --accent: #b592e6; --accent-ink: #15101f; --accent-soft: #2a2238;
    --blue: #7fb0ec; --blue-l: #1d2c42; --orange: #f0a05a; --orange-l: #3d2a17;
    --red: #f07a7a; --red-l: #3f1f1f; --green: #5fc585; --green-l: #173224;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111317; --bg-soft: #171a20; --fg: #e8eaee; --muted: #a3a9b4; --faint: #7d838e;
  --card: #181b21; --border: #2a2f38; --rule: #3a404b;
  --accent: #b592e6; --accent-ink: #15101f; --accent-soft: #2a2238;
  --blue: #7fb0ec; --blue-l: #1d2c42; --orange: #f0a05a; --orange-l: #3d2a17;
  --red: #f07a7a; --red-l: #3f1f1f; --green: #5fc585; --green-l: #173224;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 64px; }
body {
  margin: 0; background: var(--bg); color: var(--fg); font-family: var(--font);
  font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.015em; margin: 0 0 .5em; }
h2 { font-size: 1.7rem; font-weight: 700; margin-bottom: .6em; }
h3 { font-size: 1.1rem; font-weight: 650; }
p { margin: 0 0 1em; }
sup { font-size: .68em; line-height: 0; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .92em; background: var(--bg-soft); padding: .05em .3em; border-radius: 4px; }
.container { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.container.narrow { max-width: 820px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }

/* nav */
.topnav { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: 1040px; margin: 0 auto; padding: 0 20px; height: 52px; display: flex; align-items: center; gap: 18px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 650; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand-mark { background: var(--accent); color: var(--accent-ink); font-weight: 800; font-size: .8rem; letter-spacing: .04em; padding: 3px 7px; border-radius: 6px; }
.nav-links { display: flex; gap: 16px; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a { color: var(--muted); font-size: .9rem; font-weight: 500; white-space: nowrap; }
.nav-links a:hover { color: var(--fg); text-decoration: none; }
.theme-toggle { border: 1px solid var(--border); background: var(--card); color: var(--muted); width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center; cursor: pointer; flex: none; }
.theme-toggle:hover { color: var(--fg); }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: block; }
}
@media (max-width: 860px) { .brand-text { display: none; } }

/* hero */
.hero { padding: 64px 0 40px; text-align: center; background:
  radial-gradient(900px 420px at 50% -80px, var(--accent-soft), transparent 70%); }
.venue { color: var(--muted); font-weight: 500; letter-spacing: .08em; text-transform: uppercase; font-size: .78rem; margin-bottom: 14px; }
.title { font-size: clamp(2.2rem, 5.2vw, 3.6rem); font-weight: 800; letter-spacing: -0.03em; margin-bottom: 8px; }
.subtitle { font-size: clamp(1.1rem, 2.2vw, 1.45rem); color: var(--muted); font-weight: 500; margin-bottom: 26px; }
.authors { font-size: 1.05rem; display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 22px; margin-bottom: 8px; }
.author { white-space: nowrap; }
.affiliations { color: var(--muted); font-size: .92rem; display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 18px; margin-bottom: 26px; }
.buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 36px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 9px 16px; border-radius: 999px; background: var(--fg); color: var(--bg); font-weight: 600; font-size: .95rem; border: 1px solid transparent; transition: transform .12s ease, opacity .12s ease; }
.btn svg { width: 17px; height: 17px; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn.soon { background: var(--card); color: var(--muted); border-color: var(--border); cursor: default; }
.btn.soon:hover { transform: none; }
.btn.soon::after { content: "soon"; font-size: .7rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px; padding: 1px 7px; margin-left: 2px; }
.tldr { text-align: left; max-width: 860px; margin: 0 auto; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px 24px 8px; }
.tldr-head { font-weight: 800; letter-spacing: .06em; font-size: .78rem; color: var(--accent); margin-bottom: 8px; }
.tldr ul { margin: 0; padding-left: 20px; }
.tldr li { margin-bottom: 10px; }

/* sections */
.section { padding: 56px 0 8px; }
.lead { font-size: 1.05rem; color: var(--muted); max-width: 880px; }
.note { color: var(--muted); font-size: .95rem; max-width: 980px; margin-top: 14px; }
.caption { color: var(--muted); font-size: .9rem; margin-top: 12px; }
.fut-a { color: var(--blue); font-family: var(--serif); font-weight: 700; font-size: 1.08em; }
.fut-b { color: var(--orange); font-family: var(--serif); font-weight: 700; font-size: 1.08em; }

/* animation */
.anim-wrap { padding: 10px 10px 8px; overflow: hidden; }
.anim-stage { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: 8px; }
#mfd-anim { display: block; width: 100%; height: auto; background: #fff; border-radius: 8px; font-family: var(--font); }
@media (max-width: 700px) { #mfd-anim { min-width: 720px; } }
.anim-hint { display: none; color: var(--faint); font-size: .8rem; margin: 6px 6px 0; }
@media (max-width: 700px) { .anim-hint { display: block; } }
.anim-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 10px 6px 2px; }
.ctl { border: 1px solid var(--border); background: var(--card); color: var(--fg); border-radius: 8px; padding: 6px 12px; font: inherit; font-size: .88rem; font-weight: 600; cursor: pointer; min-width: 74px; }
.ctl:hover { border-color: var(--faint); }
.anim-scenes { display: flex; gap: 4px; flex-wrap: wrap; }
.anim-scenes button { border: 1px solid transparent; background: transparent; color: var(--muted); border-radius: 999px; padding: 5px 10px; font: inherit; font-size: .82rem; font-weight: 500; cursor: pointer; }
.anim-scenes button:hover { color: var(--fg); background: var(--bg-soft); }
.anim-scenes button.on { background: var(--accent-soft); color: var(--accent); border-color: transparent; font-weight: 600; }
.anim-progress { flex: 1 1 120px; height: 6px; background: var(--bg-soft); border-radius: 999px; overflow: hidden; cursor: pointer; min-width: 100px; }
.anim-progress-bar { height: 100%; width: 0; background: var(--accent); border-radius: 999px; }
.ctl-speed { color: var(--muted); font-size: .82rem; display: inline-flex; align-items: center; gap: 6px; }
.ctl-speed select { font: inherit; font-size: .82rem; border: 1px solid var(--border); background: var(--card); color: var(--fg); border-radius: 6px; padding: 3px 6px; }

/* stats */
.numbers { padding-top: 40px; }
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px 16px; box-shadow: var(--shadow); }
.stat-v { font-size: 2rem; font-weight: 800; letter-spacing: -0.03em; color: var(--accent); line-height: 1.1; margin-bottom: 6px; }
.stat-v .x { font-size: .75em; }
.stat-l { color: var(--muted); font-size: .9rem; line-height: 1.45; }
@media (max-width: 760px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .stat-grid { grid-template-columns: 1fr; } }

/* method */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 22px; }
.step { padding: 20px 20px 8px; position: relative; }
.step-n { width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-weight: 800; display: grid; place-items: center; font-size: .9rem; margin-bottom: 12px; }
.step p { color: var(--muted); font-size: .95rem; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }

/* figures and tables */
.figure { margin: 0 0 18px; padding: 16px 16px 10px; }
.figure img { display: block; width: 100%; height: auto; background: #fff; border-radius: 6px; }
.figure.half img { max-width: 620px; margin: 0 auto; }
.figure.mid img { max-width: 700px; margin: 0 auto; }
.figure.mid figcaption { max-width: 820px; margin-left: auto; margin-right: auto; }
.figure figcaption { color: var(--muted); font-size: .9rem; margin-top: 10px; }
.table-wrap { overflow-x: auto; padding: 8px 12px 6px; margin-bottom: 8px; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; font-variant-numeric: tabular-nums; }
caption { caption-side: top; text-align: left; color: var(--muted); font-size: .9rem; padding: 6px 4px 10px; }
th, td { padding: 6px 8px; text-align: left; white-space: nowrap; border-bottom: 1px solid var(--border); }
thead th { font-weight: 600; color: var(--muted); border-bottom: 1px solid var(--rule); text-align: center; }
thead th:first-child, thead th:nth-child(2) { text-align: left; }
.results td:nth-child(n+3), .results.compact td:nth-child(n+2) { text-align: center; }
.results td s { text-decoration: none; color: var(--faint); font-size: .86em; }
.results tr.block td { background: var(--bg-soft); color: var(--muted); font-size: .86rem; padding: 5px 8px; }
.results tr.ours td { background: color-mix(in srgb, var(--accent-soft) 55%, transparent); }
.results tr.ours td:first-child { color: var(--accent); font-weight: 650; }
.results b { font-weight: 750; }
.forks td:first-child { text-align: center; font-weight: 650; color: var(--accent); }
.forks td:last-child { white-space: normal; }
.models td a { font-weight: 500; }
.two-col { display: grid; grid-template-columns: 1.15fr 1fr; gap: 18px; align-items: start; margin-bottom: 16px; }
.serving-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(240px, 1fr); gap: 18px; align-items: start; margin-bottom: 16px; }
.serving-grid .table-wrap { min-width: 0; }
.results.compact { font-size: .86rem; }
.results.compact th, .results.compact td { padding: 5px 6px; }
@media (max-width: 1000px) { .serving-grid { grid-template-columns: 1fr; } }
.serving-text p, .modes-text p { color: var(--muted); font-size: .97rem; }
.modes-grid { grid-template-columns: 1.1fr 1fr; }
.facts { padding-left: 18px; color: var(--muted); font-size: .95rem; }
.facts li { margin-bottom: 8px; }
.facts strong { color: var(--fg); }
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }

/* bibtex */
.bib { position: relative; padding: 6px 12px; }
.bib pre { margin: 0; padding: 12px 6px; overflow-x: auto; font-size: .86rem; line-height: 1.5; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.copy { position: absolute; top: 10px; right: 12px; border: 1px solid var(--border); background: var(--card); color: var(--muted); border-radius: 8px; padding: 5px 10px; font: inherit; font-size: .8rem; font-weight: 600; cursor: pointer; }
.copy:hover { color: var(--fg); }

/* footer */
.footer { margin-top: 56px; padding: 28px 0 40px; border-top: 1px solid var(--border); color: var(--muted); font-size: .9rem; }
.footer .fine { color: var(--faint); font-size: .84rem; }