:root {
  --bg: #0f1720;
  --card: #18222e;
  --line: #2a3744;
  --text: #e8eef4;
  --muted: #9fb0c0;
  --accent: #38bdf8;
  --low: #2dd4a7;
  --moderate: #eab308;
  --high: #f97316;
  --severe: #ef4444;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.app {
  max-width: 640px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

header h1 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: -0.02em;
}

.tag {
  color: var(--muted);
  margin: 6px 0 28px;
}

.panel, .result {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

label {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  color: var(--muted);
  gap: 6px;
}

input[type="number"], select {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--text);
  padding: 10px 12px;
  font-size: 1rem;
}

input:focus, select:focus { border-color: var(--accent); }
input:focus-visible, select:focus-visible, .ghost:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

label.check {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 0.95rem;
}

label.check input { width: 18px; height: 18px; accent-color: var(--accent); }

.ghost {
  margin-top: 18px;
  width: 100%;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--accent);
  border-radius: 9px;
  padding: 11px;
  font-size: 0.95rem;
  cursor: pointer;
}

.ghost:hover { border-color: var(--accent); }

.result { margin-top: 18px; }

.risk {
  display: flex;
  align-items: baseline;
  gap: 14px;
  border-left: 4px solid var(--muted);
  padding-left: 16px;
}

.risk.low { border-color: var(--low); }
.risk.moderate { border-color: var(--moderate); }
.risk.high { border-color: var(--high); }
.risk.severe { border-color: var(--severe); }

.pct { font-size: 2.6rem; font-weight: 700; }
.band { color: var(--muted); font-size: 1rem; }

.reco { font-size: 1.1rem; margin: 18px 0 6px; }
.detail { color: var(--muted); margin: 0; font-size: 0.9rem; }

.hint { color: var(--muted); font-size: 0.78rem; margin: 4px 0 0; line-height: 1.45; }
.grid .hint { grid-column: 1 / -1; margin-top: -4px; }
.app > .hint { margin-top: 14px; }

footer {
  display: flex;
  justify-content: space-between;
  margin-top: 26px;
  font-size: 0.8rem;
  color: var(--muted);
}

footer a { color: var(--accent); text-decoration: none; }

@media (max-width: 480px) {
  .grid { grid-template-columns: 1fr; }
}