:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --ink: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --line: #e5e7eb;
  --danger: #dc2626;
  --ok: #059669;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.45;
}
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { font-weight: 600; color: var(--ink); text-decoration: none; }
.topbar nav a { margin-left: 16px; color: var(--accent); text-decoration: none; }
.topbar nav a.muted { color: var(--muted); }
main { max-width: 900px; margin: 24px auto 80px; padding: 0 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 20px;
}
.section-title {
  font-size: 1.15em;
  font-weight: 600;
  margin: 0 0 4px;
}
.section-desc { color: var(--muted); margin: 0 0 12px; font-size: .93em; }

.q { padding: 14px 0; border-top: 1px solid var(--line); }
.q:first-of-type { border-top: none; }
.q.hidden { display: none; }
.q-label { font-weight: 500; margin-bottom: 6px; display: block; }
.q-label .req { color: var(--danger); }
.hint { color: var(--muted); font-size: .88em; margin: 2px 0 8px; }

input[type=text], input[type=number], select {
  width: 100%;
  max-width: 420px;
  padding: 8px 10px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 15px;
  background: #fff;
}
input:focus { outline: 2px solid #bfdbfe; border-color: var(--accent); }
.opts label {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  padding: 5px 0;
  cursor: pointer;
}
.opts input { margin-top: 3px; flex: 0 0 auto; }
.detail-input { margin-top: 6px; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 22px;
  font-size: 16px;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: var(--accent-dark); }
.btn.secondary { background: #fff; color: var(--ink); border: 1px solid #cbd5e1; }
.btn.danger { background: var(--danger); }
.btn.small { padding: 5px 12px; font-size: 14px; }

.error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
}
.notice {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
}

table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: .9em; }
tr:hover td { background: #f9fafb; }
.actions form { display: inline; }
.toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar input[type=text] { max-width: 220px; }
.count { color: var(--muted); font-size: .9em; }

.login-box { max-width: 380px; margin: 60px auto; }
.login-box .card { padding: 28px; }
.login-box input { max-width: 100%; margin-bottom: 12px; }

.bmi-badge { color: var(--ok); font-size: .9em; margin-left: 8px; }

input.invalid { border-color: var(--danger); background: #fef2f2; }
.field-error { color: var(--danger); font-size: .85em; margin-top: 4px; }

.disease-box { margin-top: 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.chips:empty { margin-bottom: 0; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1e40af;
  border-radius: 999px;
  padding: 3px 6px 3px 12px;
  font-size: .9em;
}
.chip-x {
  border: none;
  background: none;
  color: #1e40af;
  cursor: pointer;
  font-size: 1.05em;
  line-height: 1;
  padding: 2px 5px;
  border-radius: 50%;
}
.chip-x:hover { background: #dbeafe; }
.disease-controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.disease-select { max-width: 340px; padding: 8px 10px; border: 1px solid #cbd5e1; border-radius: 8px; font-size: 15px; background: #fff; }
.disease-other { display: flex; gap: 6px; align-items: center; }
.disease-other .other-input { max-width: 260px; }
.view-answer { color: var(--ink); }
.view-empty { color: #cbd5e1; }