/* I146 Presenter Page Styles — Dark-first, Chinese, SciencePlots aesthetic */
/* ========================================================================== */

:root {
  --ink: #e9eef7;
  --dim: #b7c1d3;
  --panel: #101722;
  --page: #08101b;
  --cyan: #65d8e8;
  --amber: #ffc76a;
  --pink: #ff8c93;
  --green: #b8e86b;
  --zero-cov: #2e3d4f;
  --border: #4e5b6b;
  --grid: #536070;
  --frame: #556070;
  --kicker: #65d8e8;
  --card-bg: #0e1520;
  --card-border: #2a3545;
  --focus: #ffc76a;
  --shadow: rgba(0,0,0,0.45);
}

html.light {
  --ink: #0d1520;
  --dim: #4a5568;
  --panel: #f7fafc;
  --page: #ffffff;
  --cyan: #007b9e;
  --amber: #c47000;
  --pink: #c53030;
  --green: #2f855a;
  --zero-cov: #e2e8f0;
  --border: #cbd5e0;
  --grid: #e2e8f0;
  --frame: #cbd5e0;
  --kicker: #007b9e;
  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  --focus: #c47000;
  --shadow: rgba(0,0,0,0.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: "Noto Sans CJK JP", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--page);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 2px; }

img { max-width: 100%; height: auto; display: block; }

/* ==========================================================================
   Layout
   ========================================================================== */

.container { max-width: 980px; margin: 0 auto; padding: 0 1.25rem; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: linear-gradient(180deg, var(--page) 0%, rgba(8,16,27,0.95) 100%);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.header-inner { max-width: 980px; margin: 0 auto; padding: 0.75rem 1.25rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.header-left { display: flex; align-items: center; gap: 0.5rem; }
.logo { font-weight: 700; font-size: 1.1rem; color: var(--ink); }
.badge { background: var(--amber); color: #08101b; font-size: 0.7rem; font-weight: 700; padding: 0.15rem 0.4rem; border-radius: 3px; letter-spacing: 0.05em; }
.header-right { display: flex; align-items: center; gap: 0.75rem; }
.nav-link { font-size: 0.85rem; color: var(--dim); }
.nav-link:hover { color: var(--cyan); }
.theme-toggle { background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 0.35rem 0.6rem; font-size: 1.1rem; cursor: pointer; color: var(--ink); }
.theme-toggle:hover { border-color: var(--amber); }

/* ==========================================================================
   Hero
   ========================================================================== */

#hero { padding: 3rem 1.25rem 2rem; text-align: center; }
.section-kicker { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--kicker); margin-bottom: 0.5rem; }
#hero h1 { font-size: clamp(1.5rem, 4vw, 2.2rem); font-weight: 800; line-height: 1.25; margin-bottom: 1rem; color: var(--ink); }
.lead { font-size: clamp(1rem, 2.5vw, 1.15rem); line-height: 1.7; max-width: 800px; margin: 0 auto 1rem; }
.lead-sub { font-size: 0.95rem; color: var(--dim); max-width: 700px; margin: 0 auto; }

/* ==========================================================================
   Sections
   ========================================================================== */

section { padding: 2.5rem 0; }
section h2 { font-size: clamp(1.3rem, 3vw, 1.7rem); font-weight: 700; margin-bottom: 1.5rem; color: var(--ink); }

/* ==========================================================================
   Why Grid
   ========================================================================== */

.why-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.25rem; margin-bottom: 1.5rem; }
.why-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 10px; padding: 1.25rem; }
.why-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.75rem; color: var(--amber); }
.why-card ul { list-style: none; font-size: 0.9rem; line-height: 1.8; color: var(--dim); }
.why-card li { position: relative; padding-left: 1.2rem; }
.why-card li::before { content: "•"; position: absolute; left: 0; color: var(--cyan); }

.callout { background: rgba(101,216,232,0.08); border: 1px solid rgba(101,216,232,0.25); border-radius: 8px; padding: 1rem 1.25rem; font-size: 0.9rem; line-height: 1.7; color: var(--dim); }
.callout strong { color: var(--cyan); }
.callout.warning { background: rgba(255,199,106,0.08); border-color: rgba(255,199,106,0.25); }
.callout.warning strong { color: var(--amber); }

/* ==========================================================================
   Figure Grid
   ========================================================================== */

.figure-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; margin: 1.5rem 0; }
.figure-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 10px; overflow: hidden; }
.figure-title { font-size: 0.95rem; font-weight: 700; padding: 0.85rem 1rem; background: linear-gradient(90deg, var(--panel), var(--card-bg)); border-bottom: 1px solid var(--card-border); color: var(--ink); }
.figure-card img { width: 100%; height: auto; }
.figure-caption { padding: 0.85rem 1rem; font-size: 0.8rem; line-height: 1.6; color: var(--dim); background: var(--panel); border-top: 1px solid var(--card-border); }
.figure-caption code { background: rgba(255,255,255,0.05); padding: 0.1rem 0.3rem; border-radius: 3px; font-size: 0.85em; font-family: "JetBrains Mono", "Fira Code", monospace; }

.methods-details { margin-top: 1.5rem; border: 1px solid var(--card-border); border-radius: 8px; background: var(--card-bg); }
.methods-details summary { padding: 0.85rem 1.25rem; font-weight: 600; color: var(--cyan); cursor: pointer; list-style: none; }
.methods-details summary::-webkit-details-marker { display: none; }
.methods-details summary::before { content: "▸ "; display: inline-block; transition: transform 0.2s; }
.methods-details[open] summary::before { transform: rotate(90deg); }
.methods-details ul { padding: 0 1.25rem 1.25rem; font-size: 0.85rem; line-height: 1.8; color: var(--dim); list-style: disc; margin-left: 1.25rem; }
.methods-details li { margin-bottom: 0.35rem; }
.methods-details code { background: rgba(255,255,255,0.05); padding: 0.1rem 0.35rem; border-radius: 3px; font-family: "JetBrains Mono", "Fira Code", monospace; font-size: 0.9em; }

/* ==========================================================================
   Decision Figure
   ========================================================================== */

.decision-figure .figure-caption { text-align: center; }

.outcome-grammar { margin-top: 1.5rem; }
.outcome-grammar h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.75rem; color: var(--ink); }

.outcome-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 8px; overflow: hidden; }
.outcome-table th, .outcome-table td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--card-border); text-align: left; }
.outcome-table th { background: var(--panel); font-weight: 700; color: var(--ink); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; }
.outcome-table tr:last-child td { border-bottom: none; }
.outcome-table td:first-child { font-weight: 600; color: var(--amber); white-space: nowrap; }

.caveat { margin-top: 1rem; padding: 0.85rem 1rem; background: rgba(255,140,147,0.08); border: 1px solid rgba(255,140,147,0.25); border-radius: 8px; font-size: 0.85rem; line-height: 1.6; color: var(--dim); }
.caveat strong { color: var(--pink); }

/* ==========================================================================
   Archive Table
   ========================================================================== */

.archive-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 8px; overflow: hidden; margin-top: 1rem; }
.archive-table th, .archive-table td { padding: 0.7rem 0.85rem; border-bottom: 1px solid var(--card-border); text-align: left; }
.archive-table th { background: var(--panel); font-weight: 700; color: var(--ink); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; }
.archive-table tr:last-child td { border-bottom: none; }
.archive-table td:first-child { font-weight: 600; color: var(--cyan); white-space: nowrap; }
.archive-table td:nth-child(4) { font-family: "JetBrains Mono", monospace; }
.archive-table td:nth-child(5) { color: var(--pink); font-weight: 600; }

/* ==========================================================================
   Decision Card
   ========================================================================== */

.decision-card { background: var(--card-bg); border: 2px solid var(--amber); border-radius: 10px; padding: 1.5rem; margin-top: 1.5rem; }
.decision-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 1rem; color: var(--amber); }
.decision-card p { font-size: 0.95rem; line-height: 1.8; margin-bottom: 0.5rem; }
.decision-card strong { color: var(--ink); }

/* ==========================================================================
   Sources & Footer
   ========================================================================== */

.sources { list-style: none; font-size: 0.9rem; line-height: 1.9; color: var(--dim); }
.sources li { padding-left: 1.5rem; position: relative; margin-bottom: 0.5rem; }
.sources li::before { content: "▸"; position: absolute; left: 0; color: var(--cyan); }
.sources a { color: var(--cyan); }
.sources code { background: rgba(255,255,255,0.05); padding: 0.1rem 0.35rem; border-radius: 3px; font-family: "JetBrains Mono", monospace; font-size: 0.9em; }

.footer-boundary { margin-top: 1.5rem; padding: 1rem; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; font-size: 0.85rem; color: var(--dim); text-align: center; font-style: italic; }

.site-footer { padding: 2rem 1.25rem; border-top: 1px solid var(--border); background: var(--panel); }
.footer-inner { max-width: 980px; margin: 0 auto; text-align: center; font-size: 0.8rem; color: var(--dim); }
.footer-inner p { margin-bottom: 0.35rem; }
.footer-hash code { font-family: "JetBrains Mono", monospace; font-size: 0.85em; background: rgba(255,255,255,0.05); padding: 0.15rem 0.4rem; border-radius: 3px; }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 640px) {
  .container { padding: 0 1rem; }
  .header-inner { padding: 0.6rem 1rem; }
  section { padding: 2rem 0; }
  .why-grid { grid-template-columns: 1fr; }
  .figure-grid { gap: 1rem; }
}

/* ==========================================================================
   Print
   ========================================================================== */

@media print {
  .site-header, .theme-toggle, .methods-details summary, .site-footer { display: none; }
  body { background: white; color: black; }
  .figure-card { break-inside: avoid; page-break-inside: avoid; }
  a { text-decoration: none; color: inherit; }
}