:root {
  --bg: #FAFAF7;
  --bg-warm: #F5F3EE;
  --card: #FFFFFF;
  --text: #1C1917;
  --text-secondary: #57534E;
  --muted: #A8A29E;
  --accent: #E8740C;
  --green: #15803D;
  --green-soft: rgba(21, 128, 61, 0.06);
  --green-border: rgba(21, 128, 61, 0.18);
  --red: #B91C1C;
  --red-soft: rgba(185, 28, 28, 0.05);
  --amber: #B45309;
  --border: #E7E5E4;
  --radius: 16px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--bg); color: var(--text);
  line-height: 1.6; -webkit-font-smoothing: antialiased;
}

/* NAV */
nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 32px;
  background: rgba(250,250,247,0.88);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.logo-mark {
  width: 32px; height: 32px; background: var(--accent); border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 700; font-size: 16px;
}
.logo-text { font-family: 'Source Serif 4', Georgia, serif; font-weight: 700; font-size: 17px; letter-spacing: -0.02em; }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-pill {
  display: flex; align-items: center; gap: 6px;
  font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--text-secondary);
  background: var(--bg-warm); padding: 5px 12px; border-radius: 100px; border: 1px solid var(--border);
}
.live-dot { width: 6px; height: 6px; background: var(--green); border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity:1 } 50% { opacity:0.4 } }

.page { max-width: 860px; margin: 0 auto; padding: 0 24px 60px; }

/* HERO */
.hero { text-align: center; padding: 36px 0 24px; }
.hero h1 {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 34px; font-weight: 700; letter-spacing: -0.03em; line-height: 1.15;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { font-size: 14px; color: var(--text-secondary); margin-top: 6px; }

/* INPUT BAR */
.input-bar {
  display: flex; gap: 12px; flex-wrap: wrap;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 22px; margin-bottom: 24px;
}
.input-group { flex: 1; min-width: 110px; }
.input-group label {
  display: block; font-size: 10px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 3px;
}
.input-prefix {
  display: flex; align-items: center;
  border: 1px solid var(--border); border-radius: 8px; background: var(--bg); overflow: hidden;
}
.input-prefix span {
  padding: 6px 0 6px 9px; font-family: 'JetBrains Mono', monospace;
  font-size: 13px; color: var(--muted);
}
.input-prefix input {
  border: none; background: transparent; padding: 6px 8px 6px 3px;
  font-family: 'JetBrains Mono', monospace; font-size: 13px; font-weight: 500;
  color: var(--text); outline: none; width: 100%; min-width: 0;
}

/* DERIVED BAR */
.derived-bar {
  display: flex; gap: 24px; justify-content: center;
  margin: -8px 0 24px;
  padding: 10px 22px;
  background: var(--bg-warm); border-radius: 10px; border: 1px solid var(--border);
}
.derived-item {
  display: flex; align-items: center; gap: 6px;
}
.derived-label {
  font-size: 11px; font-weight: 600; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.04em;
}
.derived-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px; font-weight: 600; color: var(--text);
}

/* SECTION HEADERS */
.section { margin-bottom: 28px; }
.section-header {
  display: flex; align-items: center; gap: 10px; margin-bottom: 14px;
}
.section-num {
  width: 28px; height: 28px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: white; flex-shrink: 0;
}
.section-title {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 20px; font-weight: 700; letter-spacing: -0.02em;
}
.section-subtitle { font-size: 13px; color: var(--text-secondary); margin-top: -10px; margin-bottom: 14px; padding-left: 38px; }

/* SAFETY CARD */
.safety-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 28px; position: relative; overflow: hidden;
}
.safety-card.safe { border-color: var(--green-border); }
.safety-card.safe::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--green);
}
.safety-card.exposed { border-color: rgba(180,83,9,0.3); }
.safety-card.exposed::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--amber);
}

.safety-status {
  display: flex; align-items: center; gap: 16px; margin-bottom: 20px;
}
.safety-badge {
  padding: 6px 14px; border-radius: 8px; font-size: 13px; font-weight: 700;
  letter-spacing: 0.02em;
}
.safety-badge.safe { background: var(--green-soft); color: var(--green); }
.safety-badge.exposed { background: rgba(180,83,9,0.08); color: var(--amber); }
.safety-card.at-risk { border-color: rgba(185,28,28,0.3); }
.safety-card.at-risk::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--red);
}
.safety-badge.at-risk { background: var(--red-soft); color: var(--red); }
.safety-detail { font-size: 14px; color: var(--text-secondary); }
.safety-detail strong { color: var(--text); font-weight: 600; }

/* DIVERGENCE CHART */
.divergence-wrap {
  background: var(--bg); border-radius: 12px; padding: 20px 20px 14px;
  margin-top: 4px;
}
.divergence-legend {
  display: flex; gap: 20px; margin-bottom: 12px; font-size: 12px; color: var(--muted);
}
.divergence-legend span { display: flex; align-items: center; gap: 6px; }
.legend-line { width: 20px; height: 3px; border-radius: 2px; }
.divergence-label {
  font-size: 12px; font-weight: 600; color: var(--text-secondary); margin-bottom: 8px;
}
.divergence-insight {
  margin-top: 14px; padding: 12px 16px; border-radius: 10px;
  background: var(--green-soft); font-size: 13px; color: var(--text-secondary); line-height: 1.6;
}
.divergence-insight strong { color: var(--green); font-weight: 700; }

/* DISTRIBUTION CARD */
.distribution-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 28px;
}
.dist-position {
  display: flex; align-items: baseline; gap: 16px; margin-bottom: 6px; flex-wrap: wrap;
}
.dist-mult {
  font-family: 'JetBrains Mono', monospace;
  font-size: 36px; font-weight: 700; letter-spacing: -0.04em; color: var(--text);
}
.dist-mult-unit { font-size: 20px; color: var(--muted); font-weight: 500; }
.dist-tag {
  padding: 5px 12px; border-radius: 6px; font-size: 12px; font-weight: 700;
}
.dist-tag.discount { background: rgba(21,128,61,0.08); color: var(--green); }
.dist-tag.premium { background: var(--red-soft); color: var(--red); }
.dist-stats {
  display: flex; gap: 28px; margin-bottom: 20px; font-size: 13px; color: var(--text-secondary);
}
.dist-stats strong { color: var(--text); font-weight: 600; }

/* SVG HISTOGRAM */
.histogram-wrap { margin: 0 -8px; }

/* OPTIMAL ZONE */
.optimal-callout {
  display: flex; align-items: flex-start; gap: 12px;
  margin-top: 16px; padding: 14px 18px; border-radius: 10px;
  background: rgba(232,116,12,0.05); border: 1px solid rgba(232,116,12,0.15);
  font-size: 13px; color: var(--text-secondary); line-height: 1.6;
}
.optimal-callout strong { color: var(--accent); }
.optimal-icon { font-size: 18px; flex-shrink: 0; margin-top: 1px; }

/* SATS CARD */
.sats-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 32px; text-align: center;
}
.sats-card.behind { border-color: rgba(185,28,28,0.15); }
.sats-card.ahead { border-color: var(--green-border); }
.sats-label {
  font-size: 11px; font-weight: 600; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px;
}
.sats-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 42px; font-weight: 700; letter-spacing: -0.04em; line-height: 1;
}
.sats-number.behind { color: var(--red); }
.sats-number.ahead { color: var(--green); }
.sats-explain {
  font-size: 14px; color: var(--text-secondary); margin-top: 14px; line-height: 1.6;
  max-width: 520px; margin-left: auto; margin-right: auto;
}
.sats-explain strong { color: var(--text); font-weight: 600; }
.sats-meta {
  display: flex; justify-content: center; gap: 32px; margin-top: 18px;
  padding-top: 16px; border-top: 1px solid var(--border);
}
.sats-meta-item { text-align: center; }
.sats-meta-label { font-size: 10px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.sats-meta-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px; font-weight: 600; margin-top: 2px;
}

/* COST CARD */
.cost-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 32px; text-align: center;
}
.cost-label {
  font-size: 11px; font-weight: 600; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px;
}
.cost-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 42px; font-weight: 700; letter-spacing: -0.04em; line-height: 1;
  color: var(--green);
}
.cost-explain {
  font-size: 14px; color: var(--text-secondary); margin-top: 14px; line-height: 1.6;
  max-width: 520px; margin-left: auto; margin-right: auto;
}
.cost-explain strong { color: var(--text); font-weight: 600; }
.cost-meta {
  display: flex; justify-content: center; gap: 32px; margin-top: 18px;
  padding-top: 16px; border-top: 1px solid var(--border);
}
.cost-meta-item { text-align: center; }
.cost-meta-label { font-size: 10px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.cost-meta-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px; font-weight: 600; margin-top: 2px; color: var(--text);
}

/* ACTION CARD */
.action-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 32px; text-align: center; position: relative; overflow: hidden;
}
.action-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
}
.action-green { border-color: var(--green-border); }
.action-green::before { background: var(--green); }
.action-accent { border-color: rgba(232, 116, 12, 0.3); }
.action-accent::before { background: var(--accent); }
.action-red { border-color: rgba(185, 28, 28, 0.3); }
.action-red::before { background: var(--red); }

.action-badge {
  display: inline-block; padding: 8px 24px; border-radius: 10px;
  font-size: 18px; font-weight: 700; letter-spacing: 0.03em;
  text-transform: uppercase; margin-bottom: 14px;
}
.action-badge-green { background: var(--green-soft); color: var(--green); }
.action-badge-accent { background: rgba(232, 116, 12, 0.08); color: var(--accent); }
.action-badge-red { background: var(--red-soft); color: var(--red); }

.action-reason {
  font-size: 15px; color: var(--text-secondary); line-height: 1.6;
  max-width: 520px; margin: 0 auto 20px;
}

.action-pills {
  display: flex; justify-content: center; gap: 24px;
  padding-top: 18px; border-top: 1px solid var(--border);
}
.action-pill { text-align: center; }
.action-pill-label {
  display: block; font-size: 10px; font-weight: 600; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.05em;
}
.action-pill-value {
  display: block; font-family: 'JetBrains Mono', monospace;
  font-size: 16px; font-weight: 600; margin-top: 2px; color: var(--text);
}

/* NARRATIVE */
.narrative {
  border-radius: 14px; padding: 20px 24px; margin-top: 28px;
  background: var(--bg-warm); border: 1px solid var(--border);
}
.narrative-label {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.08em; margin-bottom: 6px; color: var(--text-secondary);
}
.narrative p { font-size: 14px; line-height: 1.7; color: var(--text-secondary); }
.narrative strong { color: var(--text); }

/* NAV LINK */
.nav-link {
  font-size: 13px; font-weight: 600; color: var(--accent);
  text-decoration: none; padding: 5px 14px; border-radius: 100px;
  border: 1px solid rgba(232, 116, 12, 0.2); transition: all 0.15s;
}
.nav-link:hover { background: rgba(232, 116, 12, 0.06); border-color: var(--accent); }

/* BRIDGE CARD */
.bridge-card {
  display: flex; align-items: center; gap: 16px;
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 20px 24px; margin-top: 32px; box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.bridge-icon { font-size: 24px; flex-shrink: 0; }
.bridge-text { flex: 1; font-size: 14px; color: var(--text-secondary); line-height: 1.5; }
.bridge-text strong { color: var(--text); }
.bridge-btn {
  flex-shrink: 0; font-size: 13px; font-weight: 600; color: var(--accent);
  text-decoration: none; padding: 8px 18px; border-radius: 100px;
  border: 1px solid rgba(232, 116, 12, 0.25); white-space: nowrap; transition: all 0.15s;
}
.bridge-btn:hover { background: rgba(232, 116, 12, 0.06); border-color: var(--accent); }

/* FOOTER */
footer {
  padding: 28px 24px; text-align: center; font-size: 11px;
  color: var(--muted); border-top: 1px solid var(--border); margin-top: 20px;
}

/* SEPARATOR */
.section-sep {
  height: 1px; background: var(--border); margin: 32px 0;
}

@media (max-width: 768px) {
  nav { padding: 12px 16px; flex-wrap: wrap; justify-content: center; gap: 8px; }
  .logo { width: 100%; justify-content: center; }
  .page { padding: 0 16px 40px; }
  .hero h1 { font-size: 26px; }
  .input-bar { flex-direction: column; }
  .safety-status { flex-direction: column; gap: 8px; }
  .dist-position { gap: 10px; }
  .dist-mult { font-size: 28px; }
  .dist-stats { flex-direction: column; gap: 8px; }
  .sats-number { font-size: 30px; }
  .sats-meta { flex-direction: column; gap: 14px; }
  .derived-bar { flex-direction: column; align-items: center; gap: 8px; }
  .cost-number { font-size: 30px; }
  .cost-meta { flex-direction: column; gap: 14px; }
  .action-pills { flex-direction: column; gap: 10px; }
  .bridge-card { flex-direction: column; text-align: center; }
  .bridge-btn { width: 100%; text-align: center; }
}