:root {
  --bg: #0e0f11;
  --surface: #16181d;
  --surface-2: #1e2128;
  --border: #2a2d35;
  --text: #e2e4ea;
  --muted: #7c8090;
  --accent: #5b6bff;
  --accent-dim: rgba(91,107,255,.15);
  --risk-high: #e05460;
  --risk-medium: #e8a838;
  --risk-low: #4caf7d;
  --risk-high-dim: rgba(224,84,96,.1);
  --risk-medium-dim: rgba(232,168,56,.1);
  --risk-low-dim: rgba(76,175,125,.1);
  --radius: 8px;
  --mono: 'IBM Plex Mono', monospace;
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--sans); font-size: 16px; line-height: 1.6; }

/* Topbar */
.topbar { position: sticky; top: 0; z-index: 100; display: flex; align-items: center; justify-content: space-between; padding: 0 32px; height: 52px; background: rgba(14,15,17,.94); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.brand { font-family: var(--mono); font-weight: 600; font-size: .85rem; color: var(--text); text-decoration: none; letter-spacing: .02em; }
nav { display: flex; gap: 24px; }
nav a { font-family: var(--mono); font-size: .78rem; color: var(--muted); text-decoration: none; transition: color .15s; }
nav a:hover { color: var(--text); }
.topbar-cta { font-family: var(--mono); font-size: .75rem; padding: 6px 14px; background: var(--surface-2); color: var(--text); border: 1px solid var(--border); border-radius: var(--radius); text-decoration: none; transition: border-color .15s; }
.topbar-cta:hover { border-color: var(--accent); }

/* Hero */
.hero { display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: start; padding: 72px 32px 56px; max-width: 980px; margin: 0 auto; }
.eyebrow { font-family: var(--mono); font-size: .72rem; color: var(--muted); letter-spacing: .08em; text-transform: uppercase; margin-bottom: 12px; }
h1 { font-size: 2.2rem; font-weight: 700; line-height: 1.15; margin-bottom: 16px; }
.lead { color: var(--muted); max-width: 520px; margin-bottom: 28px; font-size: .95rem; }
.cta-row { display: flex; gap: 12px; }
.primary, .secondary { font-family: var(--mono); font-size: .8rem; padding: 10px 22px; border-radius: var(--radius); text-decoration: none; display: inline-block; transition: all .15s; }
.primary { background: var(--accent); color: #fff; }
.secondary { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
.primary:hover { opacity: .88; }
.secondary:hover { border-color: var(--accent); }

/* Hero right column */
.hero-right { display: flex; flex-direction: column; gap: 12px; }
.hero-panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.panel-row { display: flex; flex-direction: column; gap: 2px; }
.panel-row span { font-family: var(--mono); font-size: .68rem; color: var(--muted); text-transform: uppercase; letter-spacing: .07em; }
.panel-row strong { font-family: var(--mono); font-size: .85rem; color: var(--text); }
.mono-val { font-family: var(--mono); }
.risk-badge { font-family: var(--mono); font-size: .85rem; font-weight: 600; }
.risk-badge.high { color: var(--risk-high); }
.risk-badge.medium { color: var(--risk-medium); }
.risk-badge.low { color: var(--risk-low); }

/* Stats row */
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; text-align: center; display: flex; flex-direction: column; gap: 2px; }
.stat-num { font-family: var(--mono); font-size: 1.4rem; font-weight: 600; color: var(--accent); }
.stat-label { font-family: var(--mono); font-size: .62rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }

/* Selector */
.selector-section { max-width: 980px; margin: 0 auto; padding: 8px 32px 16px; }
.selector-bar { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.sel-btn { font-family: var(--mono); font-size: .78rem; padding: 9px 18px; border-radius: var(--radius); background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); cursor: pointer; transition: all .15s; display: flex; align-items: center; gap: 8px; }
.sel-btn.active { background: var(--accent-dim); color: var(--text); border-color: var(--accent); }
.sel-btn:hover:not(.active) { border-color: var(--muted); color: var(--text); }
.sel-icon { font-size: 1rem; }

/* Loading animation */
.loading-bar { max-width: 980px; margin: 0 auto 8px; padding: 0 32px; }
.loading-inner { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 24px; }
.loading-steps { display: flex; flex-direction: column; gap: 8px; }
.lstep { font-family: var(--mono); font-size: .82rem; color: var(--muted); padding: 6px 10px; border-radius: 4px; transition: all .3s; opacity: .3; }
.lstep.active { color: var(--accent); opacity: 1; background: var(--accent-dim); }
.lstep.done { color: var(--risk-low); opacity: .65; }

/* Sections */
.section { padding: 56px 32px; max-width: 980px; margin: 0 auto; }
.section-dark { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 56px 32px; max-width: 100%; }
.section-dark .section-head,
.section-dark .finding-grid,
.section-dark .arch-steps,
.section-dark .code-block,
.section-dark p,
.section-dark .why-grid { max-width: 916px; margin-left: auto; margin-right: auto; }
.section-head { margin-bottom: 28px; }
.section-head h2 { font-size: 1.35rem; font-weight: 600; margin-top: 4px; }
.summary-box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 24px; }
.muted { color: var(--muted); font-size: .95rem; }

/* Grids */
.finding-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.missing-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }

/* Cards */
.finding-card { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; display: flex; flex-direction: column; gap: 8px; transition: border-color .15s; }
.section-dark .finding-card { background: var(--bg); }
.finding-card:hover { border-color: var(--muted); }
.finding-card.high, .finding-card.critical { border-left: 3px solid var(--risk-high); }
.finding-card.medium, .finding-card.important { border-left: 3px solid var(--risk-medium); }
.finding-card.low, .finding-card.routine { border-left: 3px solid rgba(76,175,125,.3); }
.card-meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.severity-tag { font-family: var(--mono); font-size: .67rem; padding: 2px 8px; border-radius: 3px; text-transform: uppercase; letter-spacing: .06em; font-weight: 600; }
.severity-tag.high, .severity-tag.critical { background: var(--risk-high-dim); color: var(--risk-high); }
.severity-tag.medium, .severity-tag.important { background: var(--risk-medium-dim); color: var(--risk-medium); }
.severity-tag.low, .severity-tag.routine { background: var(--risk-low-dim); color: var(--risk-low); }
.party-tag { font-family: var(--mono); font-size: .67rem; padding: 2px 8px; border-radius: 3px; background: var(--surface); color: var(--muted); border: 1px solid var(--border); }
.finding-card h3 { font-size: .88rem; font-weight: 600; line-height: 1.4; }
.finding-card p { font-size: .85rem; color: var(--muted); line-height: 1.5; }
.evidence { font-family: var(--mono); font-size: .75rem; color: var(--muted); border-left: 2px solid var(--border); padding-left: 10px; margin-top: 4px; font-style: italic; line-height: 1.5; }
.missing-card { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; display: flex; flex-direction: column; gap: 6px; }
.missing-icon { font-size: 1rem; color: var(--risk-medium); }
.missing-card h3 { font-size: .88rem; font-weight: 600; }
.missing-card p { color: var(--muted); font-size: .85rem; line-height: 1.5; }

/* Architecture */
.arch-steps { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; align-items: start; gap: 8px; margin-bottom: 40px; }
.arch-arrow { color: var(--muted); font-size: 1.4rem; padding-top: 24px; align-self: start; }
.arch-step { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.arch-num { font-family: var(--mono); font-size: .68rem; color: var(--accent); font-weight: 600; letter-spacing: .1em; margin-bottom: 8px; }
.arch-step h3 { font-size: .88rem; font-weight: 600; margin-bottom: 6px; }
.arch-step p { font-size: .82rem; color: var(--muted); line-height: 1.5; margin-bottom: 10px; }
.arch-tag { font-family: var(--mono); font-size: .68rem; color: var(--accent); background: var(--accent-dim); padding: 3px 8px; border-radius: 3px; display: inline-block; }

/* Code block */
.code-block { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.code-label { font-family: var(--mono); font-size: .72rem; color: var(--muted); padding: 10px 16px; border-bottom: 1px solid var(--border); }
.code-label code { color: var(--accent); }
.code-pre { font-family: var(--mono); font-size: .78rem; line-height: 1.7; padding: 16px; color: var(--text); overflow-x: auto; margin: 0; white-space: pre; tab-size: 4; }
.code-comment { color: var(--muted); }

/* Why / problems grid */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.why-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.why-icon { font-size: 1.6rem; margin-bottom: 12px; }
.why-card h3 { font-size: .95rem; font-weight: 600; margin-bottom: 8px; }
.why-card p { color: var(--muted); font-size: .88rem; line-height: 1.6; }

/* Footer */
.footer { background: var(--surface); border-top: 1px solid var(--border); padding: 28px 32px; }
.footer-inner { max-width: 980px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-brand { display: flex; flex-direction: column; gap: 2px; }
.footer-brand strong { font-family: var(--mono); font-size: .9rem; }
.footer-brand span { font-family: var(--mono); font-size: .75rem; color: var(--muted); }
.footer-brand a { color: var(--accent); text-decoration: none; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-family: var(--mono); font-size: .78rem; color: var(--muted); text-decoration: none; transition: color .15s; }
.footer-links a:hover { color: var(--text); }

/* Animations */
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.fade-in { animation: fadeIn .3s ease both; }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; }
  .arch-steps { grid-template-columns: 1fr; }
  .arch-arrow { display: none; }
  .why-grid { grid-template-columns: 1fr; }
  nav { display: none; }
}