/* ===== QUICK CUSTOMIZATION ===== */
:root {
  --primary: #2563eb;
  --bg: #f9fafb;
  --text: #111827;
  --card: #ffffff;
}

* {
  box-sizing: border-box;
  font-family: system-ui, sans-serif;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}

h1 {
  text-align: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}

label {
  display: block;
  font-size: 0.9rem;
  margin-top: 12px;
}

input,
select {
  width: 100%;
  padding: 10px;
  margin-top: 6px;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  font-size: 1rem;
}

.row {
  display: flex;
  gap: 10px;
}

.hidden {
  display: none;
}

.result {
  margin-top: 20px;
  text-align: center;
}

.bmi-value {
  font-size: 2rem;
  font-weight: bold;
  color: var(--primary);
}

.bmi-status {
  margin-top: 6px;
  font-size: 0.95rem;
}

.note {
  margin-top: 12px;
  font-size: 0.75rem;
  color: #6b7280;
  text-align: center;
}