* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #f0f4f8;
  color: #1a1a1a;
  min-height: 100vh;
}

/* ── HEADER ─────────────────────────────── */
.header {
  background: #1F4E79;
  color: white;
  padding: 16px 20px;
  text-align: center;
}
.header h1 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 4px;
}
.header p {
  font-size: 13px;
  opacity: 0.8;
}

/* ── FORM ────────────────────────────────── */
.form-container {
  padding: 16px;
  max-width: 480px;
  margin: 0 auto;
}

.field {
  background: white;
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.field label {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: #1F4E79;
  margin-bottom: 10px;
}

.field .hint {
  font-size: 12px;
  color: #888;
  margin-top: -6px;
  margin-bottom: 8px;
}

/* number input */
.field input[type="number"] {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 600;
  color: #1F4E79;
  outline: none;
}
.field input[type="number"]:focus {
  border-color: #2E75B6;
}

/* toggle buttons */
.toggle-group {
  display: flex;
  gap: 10px;
}
.toggle-btn {
  flex: 1;
  padding: 14px;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  background: white;
  font-size: 16px;
  font-weight: 600;
  color: #555;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}
.toggle-btn.active {
  background: #1F4E79;
  border-color: #1F4E79;
  color: white;
}

/* count buttons */
.count-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.count-btn {
  flex: 1;
  min-width: 60px;
  padding: 14px 8px;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  background: white;
  font-size: 16px;
  font-weight: 700;
  color: #555;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
}
.count-btn.active {
  background: #1F4E79;
  border-color: #1F4E79;
  color: white;
}

/* MUAC visual guide */
.muac-guide {
  display: flex;
  height: 20px;
  border-radius: 10px;
  overflow: hidden;
  margin-top: 8px;
  margin-bottom: 4px;
}
.muac-red    { flex: 1; background: #dc2626; }
.muac-yellow { flex: 1; background: #f59e0b; }
.muac-green  { flex: 3; background: #16a34a; }
.muac-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: #666;
  margin-top: 4px;
}

/* predict button */
.predict-btn {
  width: 100%;
  padding: 18px;
  background: #1F4E79;
  color: white;
  border: none;
  border-radius: 14px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  margin-top: 8px;
  margin-bottom: 24px;
  box-shadow: 0 4px 12px rgba(31,78,121,0.3);
  transition: all 0.2s;
}
.predict-btn:active {
  transform: scale(0.98);
  box-shadow: 0 2px 6px rgba(31,78,121,0.3);
}

/* ── RESULT SCREEN ───────────────────────── */
.result-screen {
  display: none;
  padding: 20px;
  max-width: 480px;
  margin: 0 auto;
}

.risk-badge {
  text-align: center;
  padding: 32px 20px;
  border-radius: 20px;
  margin-bottom: 20px;
}
.risk-emoji { font-size: 64px; margin-bottom: 8px; }
.risk-label {
  font-size: 32px;
  font-weight: 900;
  letter-spacing: 2px;
}
.risk-sub {
  font-size: 16px;
  margin-top: 6px;
  opacity: 0.8;
}

.reasons-box {
  background: white;
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.reasons-box h3 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #888;
  margin-bottom: 12px;
}
.reason-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.4;
}
.reason-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #1F4E79;
  margin-top: 6px;
  flex-shrink: 0;
}

.action-box {
  border-radius: 14px;
  padding: 18px 20px;
  margin-bottom: 16px;
  border: 2px solid;
  text-align: center;
  font-size: 17px;
  font-weight: 700;
}

.advice-box {
  background: #f8fafc;
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 20px;
  border-left: 4px solid #2E75B6;
}
.advice-box h3 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #888;
  margin-bottom: 8px;
}
.advice-box p {
  font-size: 15px;
  line-height: 1.5;
  color: #1a1a1a;
}

.new-child-btn {
  width: 100%;
  padding: 16px;
  background: white;
  color: #1F4E79;
  border: 2px solid #1F4E79;
  border-radius: 14px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  margin-bottom: 24px;
}

/* offline indicator */
.offline-bar {
  display: none;
  background: #f59e0b;
  color: white;
  text-align: center;
  padding: 8px;
  font-size: 13px;
  font-weight: 600;
}
body.offline .offline-bar { display: block; }