:root {
  --bg: #0f172a;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #0d9488;
  --accent-dark: #0f766e;
  --high: #dc2626;
  --moderate: #d97706;
  --low: #16a34a;
  --shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 8px 24px rgba(15, 23, 42, .06);
  --radius: 14px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f1f5f9 0%, #e2e8f0 100%);
  min-height: 100vh;
  line-height: 1.5;
}

/* Header */
.site-header {
  background: linear-gradient(120deg, #0f766e, #0d9488 60%, #14b8a6);
  color: #fff;
  padding: 28px clamp(16px, 5vw, 56px);
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 16px; }
.logo {
  font-size: 34px;
  background: rgba(255, 255, 255, .15);
  width: 56px; height: 56px;
  display: grid; place-items: center;
  border-radius: 16px;
}
.site-header h1 { margin: 0; font-size: 26px; letter-spacing: -.02em; }
.tagline { margin: 2px 0 0; opacity: .9; font-size: 14px; }
.model-strip { display: flex; gap: 10px; flex-wrap: wrap; }
.metric-chip {
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .22);
  padding: 8px 14px; border-radius: 999px;
  font-size: 13px; white-space: nowrap;
}
.metric-chip b { font-weight: 700; }

/* Layout */
main {
  max-width: 1080px;
  margin: -12px auto 40px;
  padding: 0 clamp(16px, 5vw, 32px);
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 24px;
  align-items: start;
}
@media (max-width: 860px) { main { grid-template-columns: 1fr; } }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-top: 24px;
}
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.panel h2 { margin: 0; font-size: 18px; }
.group-title {
  font-size: 13px; text-transform: uppercase; letter-spacing: .06em;
  color: var(--muted); margin: 22px 0 12px;
}
.hint { color: var(--muted); font-size: 13px; margin: 6px 0 0; }

/* Form */
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
@media (max-width: 520px) { .grid { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: 12.5px; font-weight: 500; color: var(--muted); }
.field input, .field select {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font: inherit; font-size: 14px;
  background: var(--surface-2);
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, .15);
  background: #fff;
}

.actions { display: flex; gap: 12px; margin-top: 22px; }
.btn {
  border: none; border-radius: 10px; padding: 11px 18px;
  font: inherit; font-weight: 600; font-size: 14px; cursor: pointer;
  transition: transform .05s, background .15s, box-shadow .15s;
}
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); color: #fff; box-shadow: 0 4px 12px rgba(13,148,136,.3); }
.btn.primary:hover { background: var(--accent-dark); }
.btn.primary:disabled { opacity: .6; cursor: progress; }
.btn.ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn.ghost:hover { background: var(--surface-2); color: var(--text); }

/* Result */
.result-card {
  border-radius: 12px; padding: 22px; margin-top: 16px;
  display: flex; align-items: center; gap: 22px;
  border: 1px solid var(--border);
}
.gauge {
  --p: 0;
  width: 108px; height: 108px; flex: none; border-radius: 50%;
  background: conic-gradient(var(--ring) calc(var(--p) * 1%), #e5e7eb 0);
  display: grid; place-items: center; position: relative;
}
.gauge::before { content: ""; position: absolute; inset: 10px; background: #fff; border-radius: 50%; }
.gauge span { position: relative; font-size: 24px; font-weight: 700; }
.verdict h3 { margin: 0 0 4px; font-size: 22px; }
.verdict .band { font-size: 14px; font-weight: 600; }
.verdict p { margin: 6px 0 0; font-size: 13px; color: var(--muted); }
.band-High { color: var(--high); }
.band-Moderate { color: var(--moderate); }
.band-Low { color: var(--low); }

.indicators { margin-top: 18px; display: flex; flex-direction: column; gap: 8px; }
.indicator {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; border-radius: 10px; background: var(--surface-2);
  border: 1px solid var(--border); font-size: 13.5px;
}
.indicator .tag { font-weight: 600; padding: 2px 9px; border-radius: 999px; font-size: 12px; }
.tag.low { background: #dbeafe; color: #1d4ed8; }
.tag.high { background: #fee2e2; color: #b91c1c; }
.indicators .empty { color: var(--muted); font-size: 13px; }

.disclaimer {
  margin-top: 18px; font-size: 12px; color: var(--muted);
  background: #fffbeb; border: 1px solid #fde68a; border-radius: 10px; padding: 12px 14px;
}

/* Footer */
.site-footer {
  text-align: center; padding: 28px 20px 44px; color: var(--muted); font-size: 13px;
}
.site-footer p { margin: 4px 0; }
.muted { color: var(--muted); }