:root {
  --cb-bg: #141210;
  --cb-panel: #1d1915;
  --cb-panel-deep: #181511;
  --cb-line: #322c24;
  --cb-text: #a69c8c;
  --cb-dim: #746a5c;
  --cb-head: #f0eadf;
  --cb-accent: #d9b382;
  --cb-green: #78c79b;
  --cb-amber: #e0b864;
  --cb-red: #dc7f72;
  --cb-mono: 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--cb-bg); color: var(--cb-text); font-family: 'Inter', system-ui, sans-serif; font-size: 17px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { color: var(--cb-head); text-decoration: none; }
button, input { font: inherit; }
::selection { background: rgba(217, 179, 130, 0.22); }

.cb-topbar { display: flex; justify-content: space-between; gap: 24px; max-width: 1180px; margin: 0 auto; padding: 28px 28px 0; font-family: var(--cb-mono); font-size: 0.72rem; letter-spacing: 0.05em; }
.cb-topbar a { color: var(--cb-dim); }
.cb-topbar a:hover { color: var(--cb-accent); }
.cb-shell { width: min(1120px, calc(100% - 48px)); margin: 0 auto; padding: 72px 0 112px; }
.cb-intro { max-width: 880px; }
.cb-eyebrow, .cb-section-k { margin: 0 0 12px; color: var(--cb-accent); font: 600 0.7rem/1.4 var(--cb-mono); letter-spacing: 0.13em; text-transform: uppercase; }
.cb-intro h1 { margin: 0; color: var(--cb-head); font-size: clamp(3.5rem, 11vw, 7.5rem); letter-spacing: -0.07em; line-height: 0.92; }
.cb-lede { max-width: 780px; margin: 28px 0 0; color: var(--cb-head); font-size: clamp(1.16rem, 2.2vw, 1.55rem); line-height: 1.5; }

.cb-proof { display: grid; grid-template-columns: repeat(5, 1fr); margin-top: 56px; border: 1px solid var(--cb-line); border-radius: 14px; overflow: hidden; }
.cb-proof div { min-width: 0; padding: 20px; background: var(--cb-panel-deep); }
.cb-proof div + div { border-left: 1px solid var(--cb-line); }
.cb-proof strong { display: block; color: var(--cb-head); font-size: 1.45rem; line-height: 1.2; }
.cb-proof span { display: block; margin-top: 6px; color: var(--cb-dim); font: 500 0.65rem/1.4 var(--cb-mono); letter-spacing: 0.04em; text-transform: uppercase; }

.cb-lab { display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(380px, 1.05fr); gap: 42px; margin-top: 48px; padding: 38px; border: 1px solid var(--cb-line); border-radius: 18px; background: var(--cb-panel); }
.cb-lab h2, .cb-story h2, .cb-evidence h2 { margin: 0; color: var(--cb-head); font-size: clamp(1.55rem, 3vw, 2.15rem); letter-spacing: -0.035em; line-height: 1.15; }
.cb-lab-copy > p:not(.cb-section-k) { margin: 16px 0 0; }
.cb-presets { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.cb-presets button { padding: 8px 13px; border: 1px solid var(--cb-line); border-radius: 999px; background: transparent; color: var(--cb-text); cursor: pointer; font-family: var(--cb-mono); font-size: 0.68rem; }
.cb-presets button:hover, .cb-presets button.is-active { border-color: var(--cb-accent); background: rgba(217, 179, 130, 0.1); color: var(--cb-head); }
.cb-lab label { display: flex; justify-content: space-between; margin-top: 30px; color: var(--cb-head); font-weight: 600; }
.cb-lab output { color: var(--cb-accent); font-family: var(--cb-mono); }
#scoreInput { width: 100%; margin: 16px 0 4px; accent-color: var(--cb-accent); cursor: pointer; }
.cb-scale { display: flex; justify-content: space-between; color: var(--cb-dim); font: 500 0.62rem/1.3 var(--cb-mono); }
.cb-zones { display: grid; grid-template-columns: 33fr 34fr 33fr; gap: 3px; height: 5px; margin-top: 10px; overflow: hidden; border-radius: 999px; }
.cb-zones i:nth-child(1) { background: var(--cb-red); }
.cb-zones i:nth-child(2) { background: var(--cb-amber); }
.cb-zones i:nth-child(3) { background: var(--cb-green); }

.cb-decision { padding: 26px; border: 1px solid var(--cb-line); border-radius: 14px; background: var(--cb-panel-deep); }
.cb-decision-head { display: flex; align-items: center; justify-content: space-between; gap: 18px; color: var(--cb-dim); font: 500 0.67rem/1.4 var(--cb-mono); text-transform: uppercase; }
.cb-state { padding: 5px 9px; border-radius: 999px; }
.cb-state-refuse { background: rgba(220, 127, 114, 0.12); color: var(--cb-red); }
.cb-state-review { background: rgba(224, 184, 100, 0.12); color: var(--cb-amber); }
.cb-state-file { background: rgba(120, 199, 155, 0.12); color: var(--cb-green); }
.cb-decision h3 { margin: 22px 0 0; color: var(--cb-head); font-size: 1.35rem; }
.cb-decision > p { margin: 8px 0 0; }
.cb-trace { display: grid; gap: 12px; margin: 26px 0 0; padding: 0; list-style: none; }
.cb-trace li { display: grid; grid-template-columns: 28px 1fr auto; gap: 12px; align-items: center; padding: 12px; border: 1px solid var(--cb-line); border-radius: 10px; }
.cb-trace li > span { display: grid; width: 28px; height: 28px; place-items: center; border-radius: 50%; background: rgba(217, 179, 130, 0.1); color: var(--cb-accent); font: 600 0.65rem/1 var(--cb-mono); }
.cb-trace strong, .cb-trace small { display: block; }
.cb-trace strong { color: var(--cb-head); font: 600 0.73rem/1.4 var(--cb-mono); }
.cb-trace small { margin-top: 2px; color: var(--cb-dim); font-size: 0.72rem; line-height: 1.4; }
.cb-trace b { color: var(--cb-accent); font: 600 0.62rem/1.3 var(--cb-mono); text-transform: uppercase; }

.cb-story { display: grid; grid-template-columns: 0.75fr 1.25fr; gap: 70px; margin-top: 112px; }
.cb-steps { margin: 0; padding: 0; list-style: none; }
.cb-steps li { display: grid; grid-template-columns: 42px 1fr; gap: 18px; padding: 0 0 28px; }
.cb-steps li + li { padding-top: 28px; border-top: 1px solid var(--cb-line); }
.cb-steps span { color: var(--cb-accent); font: 600 0.7rem/1.5 var(--cb-mono); }
.cb-steps h3 { margin: 0; color: var(--cb-head); font-size: 1.05rem; }
.cb-steps p { margin: 5px 0 0; }

.cb-evidence { display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 56px; margin-top: 86px; padding-top: 46px; border-top: 1px solid var(--cb-line); }
.cb-evidence > div > p:last-child { margin: 18px 0 0; }
.cb-evidence aside { padding: 24px; border: 1px solid var(--cb-line); border-radius: 12px; background: var(--cb-panel); }
.cb-evidence aside p:last-child { margin: 0; color: var(--cb-head); }
.cb-footer { display: flex; justify-content: space-between; gap: 24px; max-width: 1120px; margin: 0 auto; padding: 28px; border-top: 1px solid var(--cb-line); color: var(--cb-dim); font: 500 0.7rem/1.5 var(--cb-mono); }
.cb-footer p { margin: 0; }
.cb-footer a:hover { color: var(--cb-accent); }

@media (max-width: 820px) {
  .cb-proof { grid-template-columns: repeat(2, 1fr); }
  .cb-proof div + div { border-left: 0; }
  .cb-proof div:nth-child(even) { border-left: 1px solid var(--cb-line); }
  .cb-proof div:nth-child(n+3) { border-top: 1px solid var(--cb-line); }
  .cb-lab, .cb-story, .cb-evidence { grid-template-columns: 1fr; }
  .cb-lab { gap: 28px; padding: 26px; }
  .cb-story { gap: 34px; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .cb-topbar { padding: 22px 18px 0; }
  .cb-shell { width: min(100% - 32px, 1120px); padding-top: 52px; }
  .cb-proof { grid-template-columns: 1fr 1fr; }
  .cb-proof div { padding: 16px; }
  .cb-proof div:last-child { grid-column: 1 / -1; border-left: 0; }
  .cb-lab { margin-left: -4px; margin-right: -4px; padding: 20px; }
  .cb-trace li { grid-template-columns: 28px 1fr; }
  .cb-trace b { grid-column: 2; }
  .cb-footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }