/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --accent:    #5c3d9e;
  --accent-lt: #f3f0fb;
  --text:      #1e293b;
  --muted:     #64748b;
  --border:    #e2e8f0;
  --bg:        #ffffff;
  --card:      #f8fafc;
  --radius:    10px;
  --max-w:     860px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem; }

section { padding: 3rem 0; border-top: 1px solid var(--border); }
section:first-of-type { border-top: none; }

/* ── Context banner ───────────────────────────────────────── */
.context-banner {
  background: #f5f0fa;
  border-top: none;
  border-bottom: 1px solid #d8cce8;
  padding: 1.75rem 0;
}
.context-banner p {
  font-size: 0.97rem; line-height: 1.75;
  color: #1e0e2e; max-width: 720px;
  margin: 0 auto; text-align: center;
}

/* ── Header ───────────────────────────────────────────────── */
header {
  background: linear-gradient(180deg, #d8cce8 0%, #c0a8d8 60%, #f5f0fa 100%);
  color: #0e0820;
  padding: 4rem 0 3rem;
  text-align: center;
  border-bottom: none;
}

header .venue {
  display: inline-block;
  background: rgba(14,8,32,0.10);
  color: #4a2c7e;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 0.25rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

header h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700; line-height: 1.25;
  margin-bottom: 1.5rem; letter-spacing: -0.01em;
  color: #060310;
}

.authors      { font-size: 1rem;   color: #1e103e; margin-bottom: 0.4rem; }
.affiliations { font-size: 0.85rem; color: #4a2c7e; margin-bottom: 2rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: 0.65rem; justify-content: center; }
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.55rem 1.2rem; border-radius: 8px;
  font-size: 0.88rem; font-weight: 600; text-decoration: none;
  transition: opacity 0.15s, transform 0.1s;
}
.btn:hover { opacity: 0.85; transform: translateY(-1px); }
.btn-primary   { background: #5c3d9e; color: #f5f0fb; }
.btn-secondary { background: rgba(14,8,32,0.10); color: #0e0820; border: 1px solid rgba(14,8,32,0.3); }
.btn-disabled  { background: rgba(14,8,32,0.06); color: #8a6ab0; border: 1px solid rgba(14,8,32,0.15); cursor: default; }

/* ── Headings ─────────────────────────────────────────────── */
h2 { font-size: 1.35rem; font-weight: 700; margin-bottom: 1rem; color: var(--text); letter-spacing: -0.01em; }
h3 { font-size: 1rem; font-weight: 600; margin: 1.4rem 0 0.4rem; color: var(--text); }
p  { margin-bottom: 0.9rem; color: var(--text); }
p:last-child { margin-bottom: 0; }

/* ── Abstract ─────────────────────────────────────────────── */
.abstract-box {
  background: var(--accent-lt);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.25rem 1.5rem;
  font-size: 0.97rem; line-height: 1.7;
}

/* ── Figures ──────────────────────────────────────────────── */
figure { margin: 1.5rem 0; text-align: center; }
figure img { max-width: 100%; border-radius: var(--radius); box-shadow: 0 2px 12px rgba(0,0,0,0.10); }
figcaption { margin-top: 0.6rem; font-size: 0.83rem; color: var(--muted); line-height: 1.5; text-align: left; }

.fig-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1.5rem 0; }
.fig-row figure { margin: 0; }

/* ── Results table ────────────────────────────────────────── */
.table-wrap { overflow-x: auto; margin: 1rem 0; }
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
thead th { background: var(--card); font-weight: 600; border-bottom: 2px solid var(--border); padding: 0.55rem 0.8rem; text-align: left; }
tbody td { padding: 0.5rem 0.8rem; border-bottom: 1px solid var(--border); }
tbody tr:hover { background: var(--card); }
tbody tr.highlight { background: #f3f0fb; font-weight: 600; }
.num { text-align: right; font-variant-numeric: tabular-nums; }

/* ── Citation ─────────────────────────────────────────────── */
pre.bibtex {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.2rem;
  font-size: 0.78rem; line-height: 1.6;
  overflow-x: auto; white-space: pre;
}

/* ── Footer ───────────────────────────────────────────────── */
footer { text-align: center; padding: 2rem 0; font-size: 0.82rem; color: var(--muted); border-top: 1px solid var(--border); }

@media (max-width: 600px) {
  header { padding: 2.5rem 0 2rem; }
  section { padding: 2rem 0; }
  .fig-row { grid-template-columns: 1fr; }
}