:root {
  --teal: #1fbba4;
  --teal-dark: #199986;
  --text: #2a2a2a;
  --bg: #ffffff;
  --muted: rgba(42,42,42,.6);
  --border: rgba(42,42,42,.1);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Montserrat", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.container { width: min(960px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.94);
  backdrop-filter: blur(12px); border-bottom: 1px solid rgba(31,187,164,.18);
}
.header-inner { display: flex; justify-content: space-between; align-items: center; padding: 20px 0; gap: 16px; }
.brand-wrap { display: flex; align-items: center; gap: 18px; }
.logo { height: 54px; width: auto; object-fit: contain; }
.divider { width: 1px; height: 42px; background: rgba(31,187,164,.2); }
.brand-title { margin: 0; font-size: 40px; font-weight: 900; font-style: italic; letter-spacing: -1px; }
.brand-title span, .hero span { color: var(--teal); }
.badge { font-size: 11px; font-weight: 900; text-transform: uppercase; letter-spacing: .18em; color: var(--teal); border: 1px solid rgba(31,187,164,.28); padding: 10px 14px; border-radius: 999px; background: rgba(31,187,164,.08); }
.main { padding: 54px 0 70px; }
.step { display: none; }
.step.active { display: block; }
.hero { text-align: center; margin-bottom: 28px; }
.hero h2 { margin: 0 0 10px; font-size: clamp(36px, 8vw, 64px); line-height: .95; font-weight: 900; text-transform: uppercase; font-style: italic; }
.hero.small h2 { font-size: clamp(30px, 6vw, 48px); }
.hero p { margin: 0; color: rgba(42,42,42,.5); }
.card {
  max-width: 640px; margin: 0 auto; background: rgba(42,42,42,.03); border: 1px solid var(--border);
  border-radius: 28px; padding: 28px; box-shadow: 0 16px 40px rgba(0,0,0,.06);
}
.hidden { display: none; }
.warning { background: rgba(31,187,164,.1); border: 1px solid rgba(31,187,164,.28); color: var(--teal); padding: 14px 16px; border-radius: 18px; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 18px; }
.label { display: block; margin: 10px 0 10px; font-size: 11px; font-weight: 900; text-transform: uppercase; letter-spacing: .22em; color: var(--teal); }
select, input[type="number"] {
  width: 100%; border: 1px solid var(--border); border-radius: 18px; padding: 16px 18px; font-size: 18px; background: #fff; color: var(--text);
}
.range-head { display: flex; justify-content: space-between; align-items: end; margin-top: 20px; }
.weight-display { font-size: 18px; color: rgba(42,42,42,.4); }
.weight-display span { font-family: "JetBrains Mono", monospace; font-size: 44px; color: var(--text); }
input[type="range"] { width: 100%; margin: 16px 0 8px; accent-color: var(--teal); }
.range-scale { display: flex; justify-content: space-between; font-size: 10px; font-weight: 700; color: rgba(42,42,42,.3); text-transform: uppercase; }
.btn {
  width: 100%; border: 0; border-radius: 18px; padding: 18px 20px; font-size: 17px; font-weight: 900; text-transform: uppercase; cursor: pointer;
}
.btn-primary { background: linear-gradient(180deg, var(--teal), var(--teal-dark)); color: #fff; box-shadow: 0 14px 30px rgba(31,187,164,.25); }
.btn-secondary { background: #fff; border: 2px solid var(--border); color: rgba(42,42,42,.75); }
.actions-stack { display: grid; gap: 14px; max-width: 640px; margin: 28px auto; }
.link-back, .btn-link { background: none; border: 0; padding: 0; color: rgba(42,42,42,.5); font-weight: 900; text-transform: uppercase; letter-spacing: .15em; cursor: pointer; }
.measure-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; max-width: 720px; margin: 0 auto; }
.measure-card { background: rgba(42,42,42,.05); border: 1px solid var(--border); border-radius: 24px; padding: 18px; text-align: center; }
.measure-label { font-size: 11px; font-weight: 900; letter-spacing: .18em; text-transform: uppercase; color: rgba(42,42,42,.35); margin-bottom: 10px; }
.measure-card input { border: 0; background: transparent; text-align: center; font-family: "JetBrains Mono", monospace; font-size: 30px; font-weight: 700; color: var(--teal); padding: 0; }
.measure-card input[readonly] { color: var(--text); }
.cm { font-size: 12px; color: rgba(42,42,42,.3); }
.info-box { max-width: 640px; margin: 0 auto; background: rgba(31,187,164,.06); border: 1px solid rgba(31,187,164,.18); border-radius: 24px; padding: 20px; }
.info-box strong { display: block; color: var(--teal); text-transform: uppercase; letter-spacing: .15em; font-size: 11px; margin-bottom: 8px; }
.info-box p { margin: 0; color: rgba(42,42,42,.7); }
#results { display: grid; gap: 18px; }
.result-card { background: rgba(42,42,42,.05); border: 1px solid var(--border); border-radius: 28px; overflow: hidden; }
.result-inner { padding: 24px; }
.result-top { display: flex; justify-content: space-between; gap: 14px; align-items: start; }
.result-title { margin: 0 0 8px; font-size: 22px; font-weight: 900; font-style: italic; text-transform: uppercase; }
.result-meta { color: rgba(42,42,42,.45); font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .16em; }
.size-badge { background: var(--teal); color: #fff; min-width: 72px; text-align: center; border-radius: 18px; padding: 12px 16px; font-size: 28px; font-weight: 900; font-style: italic; }
.fit-note { margin: 16px 0; color: rgba(42,42,42,.66); font-size: 14px; }
.result-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.action-btn, .action-link { flex: 1 1 220px; border-radius: 18px; padding: 16px; text-align: center; font-weight: 900; text-transform: uppercase; letter-spacing: .14em; text-decoration: none; cursor: pointer; }
.action-btn { background: rgba(42,42,42,.05); border: 1px solid var(--border); color: var(--text); }
.action-link { background: linear-gradient(180deg, var(--teal), var(--teal-dark)); color: #fff; }
.not-found { background: rgba(255,0,0,.04); color: #b33636; border: 1px solid rgba(179,54,54,.18); padding: 14px 16px; border-radius: 18px; margin-top: 14px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; font-size: 12px; }
.restart-wrap { text-align: center; padding-top: 28px; }
@media (max-width: 720px) {
  .badge, .divider { display: none; }
  .brand-title { font-size: 34px; }
  .measure-grid { grid-template-columns: 1fr; }
  .result-top { flex-direction: column; }
}