:root {
  color-scheme: light;
  --ink: #0d1b2a;
  --muted: #5b6877;
  --line: #d9e2e8;
  --panel: #ffffff;
  --canvas: #f4f8f7;
  --accent: #087f5b;
  --accent-dark: #065f46;
  --accent-soft: #e8f7f1;
  --danger: #b42318;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--canvas); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.55; }
a { color: var(--accent-dark); font-weight: 750; text-underline-offset: 3px; }
button, input, select { font: inherit; }
.shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 24px 0 64px; }
.site-nav { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; }
.brand img { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 10px; }
.brand span { display: grid; line-height: 1.2; }
.brand small { color: var(--muted); font-weight: 650; }
.site-nav nav { display: flex; flex-wrap: wrap; gap: 14px; }
.site-nav nav a { color: var(--muted); font-size: .92rem; text-decoration: none; }
.intro { max-width: 900px; margin: 0 0 20px; }
.eyebrow { margin: 0 0 7px; color: var(--accent); font-size: .78rem; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(2rem, 5vw, 3.8rem); line-height: 1; letter-spacing: -.05em; }
.lede { max-width: 800px; margin: 14px 0 0; color: var(--muted); font-size: 1.05rem; }
.workspace { display: grid; grid-template-columns: minmax(300px, .85fr) minmax(420px, 1.15fr); gap: 18px; align-items: start; }
.panel { padding: 24px; border: 1px solid var(--line); border-radius: 22px; background: var(--panel); box-shadow: 0 16px 45px rgba(15, 23, 42, .06); }
.panel h2 { margin: 0 0 4px; font-size: 1.24rem; }
.panel-intro { margin: 0 0 18px; color: var(--muted); font-size: .92rem; }
.fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.field { display: grid; gap: 6px; }
.field.wide { grid-column: 1 / -1; }
.field label { font-size: .85rem; font-weight: 780; }
.field span { color: var(--muted); font-size: .76rem; }
input, select { width: 100%; min-height: 44px; padding: 9px 11px; color: var(--ink); border: 1px solid #bdc9d1; border-radius: 11px; background: #fff; }
input:focus, select:focus, button:focus-visible, a:focus-visible { outline: 3px solid rgba(8, 127, 91, .25); outline-offset: 2px; }
.actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; }
button { min-height: 42px; padding: 9px 13px; border: 1px solid var(--line); border-radius: 11px; color: var(--ink); background: #fff; cursor: pointer; font-weight: 780; }
button.primary { color: #fff; border-color: var(--accent); background: var(--accent); }
button:hover { transform: translateY(-1px); }
.error { margin: 12px 0 0; padding: 10px 12px; color: var(--danger); border: 1px solid #fecaca; border-radius: 10px; background: #fff7f7; font-size: .88rem; }
.metric-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 18px; }
.metric { min-width: 0; padding: 16px; border: 1px solid var(--line); border-radius: 15px; background: #fbfdfd; }
.metric.primary { grid-column: 1 / -1; padding: 20px; color: #fff; border-color: var(--accent-dark); background: linear-gradient(135deg, var(--accent-dark), #0d9488); }
.metric dt { color: var(--muted); font-size: .77rem; font-weight: 780; text-transform: uppercase; letter-spacing: .05em; }
.metric.primary dt { color: #d1fae5; }
.metric dd { overflow-wrap: anywhere; margin: 5px 0 0; font-size: clamp(1.25rem, 3vw, 2rem); font-weight: 850; letter-spacing: -.035em; }
.metric dd[data-sign="negative"] { color: #ffd3cf; }
.breakdown { width: 100%; margin-top: 18px; border-collapse: collapse; font-size: .9rem; }
.breakdown th, .breakdown td { padding: 10px 5px; border-bottom: 1px solid var(--line); text-align: left; }
.breakdown th:last-child, .breakdown td:last-child { text-align: right; }
.drag-track { height: 9px; margin-top: 14px; overflow: hidden; border-radius: 999px; background: #e2e8f0; }
.drag-track span { display: block; width: 0; height: 100%; border-radius: inherit; background: #f59e0b; transition: width .25s ease; }
.drag-label { display: flex; justify-content: space-between; gap: 12px; margin-top: 7px; color: var(--muted); font-size: .8rem; }
.method { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 18px; }
.method article { padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.method h2 { margin: 0 0 8px; font-size: 1.06rem; }
.method p, .method ul { margin: 8px 0 0; color: #3f4d5c; font-size: .92rem; }
.method ul { padding-left: 19px; }
.formula { padding: 10px 12px; border-radius: 10px; background: var(--accent-soft); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .82rem; overflow-wrap: anywhere; }
.risk { grid-column: 1 / -1; border-color: #fed7aa !important; background: #fffaf2 !important; }
footer { margin-top: 28px; padding-top: 20px; color: var(--muted); border-top: 1px solid var(--line); font-size: .9rem; }
footer nav { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 8px; }
@media (max-width: 850px) { .workspace { grid-template-columns: 1fr; } .method { grid-template-columns: 1fr; } }
@media (max-width: 580px) { .shell { width: min(100% - 22px, 1180px); padding-top: 14px; } .site-nav nav { display: none; } .panel { padding: 18px; border-radius: 18px; } .fields, .metric-grid { grid-template-columns: 1fr; } .field.wide, .metric.primary { grid-column: auto; } }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } button:hover { transform: none; } }