/* ===== Argus Project Page — Nerfies-inspired clean academic theme ===== */
:root {
  --accent: #2b5ad6;
  --accent-dark: #1d3f9e;
  --text: #1f2329;
  --muted: #5c6670;
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --border: #e6e9ef;
  --max-width: 1000px;
  --radius: 10px;
  --serif: "Google Sans", "Noto Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 19px; }

body {
  margin: 0;
  font-family: var(--serif);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); text-decoration: underline; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Hero ===== */
.hero {
  padding: 64px 0 28px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg-soft) 0%, #ffffff 100%);
}
.hero-logo {
  display: block;
  height: 80px;
  width: auto;
  margin: 0 auto 20px;
}
.venue-badge {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: #eaf0ff;
  border: 1px solid #d4e0ff;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 22px;
  text-transform: uppercase;
}
.title {
  font-size: 45px;
  font-weight: 700;
  line-height: 1.18;
  margin: 0 0 6px;
  letter-spacing: -0.5px;
}
.title .brand { color: var(--accent); }
.subtitle {
  font-size: 1.2rem;
  color: var(--muted);
  font-weight: 400;
  margin: 0 auto 28px;
  max-width: 760px;
}

/* authors */
.authors {
  font-size: 1.12rem;
  margin: 18px 0 6px;
  line-height: 2.1;
}
.authors .author { white-space: nowrap; margin: 0 6px; }
.authors sup { color: var(--accent); font-size: 0.72em; }
.affiliations {
  color: var(--muted);
  font-size: 1rem;
  margin: 4px 0 6px;
}
.affiliations sup { color: var(--accent); }
.note { color: var(--muted); font-size: 0.92rem; margin-top: 8px; }

/* link buttons */
.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 30px 0 8px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #1f2329;
  color: #fff;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 0.98rem;
  font-weight: 500;
  border: 1px solid #1f2329;
  transition: transform .12s ease, background .12s ease, box-shadow .12s ease;
}
.btn:hover {
  background: #000;
  color: #fff;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0,0,0,.14);
}
.btn .ico { display: inline-flex; align-items: center; }
.btn .ico svg { width: 17px; height: 17px; display: block; stroke: currentColor; fill: none; }
.btn.disabled {
  background: #e9ecf1;
  color: #9aa3ad;
  border-color: #e9ecf1;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===== Sections ===== */
section { padding: 52px 0; border-bottom: 1px solid var(--border); }
section:last-of-type { border-bottom: none; }
.section-title {
  font-size: 1.9rem;
  font-weight: 700;
  text-align: center;
  margin: 0 0 28px;
  letter-spacing: -0.3px;
}
.prose { max-width: 820px; margin: 0 auto; }
.prose p { margin: 0 0 16px; text-align: justify; }

/* figures */
.figure { margin: 28px auto; text-align: center; }
.figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: 0 2px 16px rgba(20,30,60,.06);
}
.figure.bare img { border: none; box-shadow: none; }
.caption {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 14px;
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
}
.caption b { color: var(--text); }

/* teaser block (no border line) */
.teaser { padding-top: 40px; padding-bottom: 40px; }

/* stat cards */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 860px;
  margin: 8px auto 30px;
}
.stat {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 12px;
  text-align: center;
}
.stat .num { font-size: 1.7rem; font-weight: 700; color: var(--accent); line-height: 1.1; }
.stat .lbl { font-size: 0.9rem; color: var(--muted); margin-top: 6px; }

/* highlights list */
.highlights { max-width: 820px; margin: 0 auto; padding: 0; list-style: none; }
.highlights li {
  position: relative;
  padding: 12px 12px 12px 44px;
  margin-bottom: 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.highlights li::before {
  content: "";
  position: absolute;
  left: 16px; top: 50%;
  width: 10px; height: 10px;
  margin-top: -5px;
  background: var(--accent);
  border-radius: 50%;
}

/* bibtex */
.bibtex pre {
  background: #0f1320;
  color: #e6e9f0;
  padding: 22px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.6;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}
.copy-bar { display: flex; justify-content: flex-end; margin-bottom: -12px; }
.copy-btn {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 0.85rem;
  cursor: pointer;
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }

/* footer */
footer {
  padding: 36px 0 48px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  background: var(--bg-soft);
}
footer a { color: var(--accent); }

/* responsive */
@media (max-width: 760px) {
  .title { font-size: 33px; }
  .subtitle { font-size: 1.02rem; }
  body { font-size: 17px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  section { padding: 40px 0; }
  .prose p { text-align: left; }
}

/* ===== Interactive demo ===== */
.demo-intro { text-align: center; margin: 0 auto 22px; max-width: 760px; }
.demo-tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 22px; }
.demo-tab {
  font: inherit;
  font-size: 0.92rem;
  padding: 7px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--muted);
  cursor: pointer;
  transition: all .12s ease;
}
.demo-tab:hover { border-color: var(--accent); color: var(--accent); }
.demo-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.demo-stage {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 20px;
  align-items: stretch;
}
.demo-side-label, .viewer-hint, .demo-side .demo-side-label {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}
.demo-side-label { margin-bottom: 10px; }
.demo-inputs { display: flex; flex-direction: column; gap: 10px; max-height: 460px; overflow-y: auto; padding-right: 4px; }
.demo-inputs img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: block;
}

.viewer-wrap {
  position: relative;
  background: radial-gradient(circle at 50% 35%, #ffffff 0%, #eef1f6 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 460px;
}
.viewer-canvas { position: absolute; inset: 0; }
.viewer-canvas canvas { display: block; width: 100% !important; height: 100% !important; cursor: grab; }
.viewer-canvas canvas:active { cursor: grabbing; }
.viewer-loading {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 0.95rem;
  background: rgba(255,255,255,.6); backdrop-filter: blur(2px);
}
.viewer-hint {
  position: absolute; top: 12px; left: 14px;
  background: rgba(255,255,255,.78);
  padding: 5px 10px; border-radius: 8px;
  pointer-events: none;
}
.viewer-controls {
  position: absolute; bottom: 12px; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap; justify-content: center;
  background: rgba(255,255,255,.85);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 16px;
  box-shadow: 0 4px 14px rgba(0,0,0,.08);
}
.vbtn {
  font: inherit; font-size: 0.85rem;
  border: none; background: none; color: var(--accent);
  cursor: pointer; padding: 0; font-weight: 500;
}
.vbtn:hover { color: var(--accent-dark); }
.vlabel { font-size: 0.82rem; color: var(--muted); display: flex; align-items: center; gap: 7px; }
.vlabel input[type=range] { width: 92px; accent-color: var(--accent); }

@media (max-width: 760px) {
  .demo-stage { grid-template-columns: 1fr; }
  .demo-inputs { flex-direction: row; max-height: none; overflow-x: auto; overflow-y: hidden; }
  .demo-inputs img { width: 180px; flex: 0 0 auto; }
  .viewer-wrap { min-height: 360px; }
  .viewer-controls { gap: 9px; padding: 6px 12px; }
}