/* ─── Charge / prediction form page ─────────── */
.charge-page {
  min-height: calc(100vh - 70px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
}

.form-wrapper {
  width: 100%;
  max-width: 560px;
}

.form-header {
  text-align: center;
  margin-bottom: 36px;
}

.form-header .form-icon {
  font-size: 48px;
  display: block;
  margin-bottom: 16px;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.06); }
}

.form-header h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text-primary) 50%, var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.form-header p {
  font-size: 14px;
  color: var(--text-muted);
}

/* ─── The glass form card ─────────────────────── */
.predict-form {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 36px;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.predict-form::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

/* ─── Form grid: 2-column for numeric inputs ─── */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 480px) {
  .form-row { grid-template-columns: 1fr; }
  .predict-form { padding: 24px; }
}

/* ─── Form group ─────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.form-group input,
.form-group select {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-size: 14px;
  font-family: 'Inter', sans-serif;
  color: var(--text-primary);
  transition: var(--transition);
  outline: none;
  width: 100%;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--primary);
  background: rgba(108,99,255,0.08);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.15);
}

.form-group input::placeholder { color: var(--text-muted); }

select option {
  background: #1a1d2e;
  color: var(--text-primary);
}

/* ─── Submit btn ─────────────────────────────── */
.form-submit {
  margin-top: 8px;
}

.btn-predict {
  width: 100%;
  padding: 15px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(108,99,255,0.4);
  position: relative;
  overflow: hidden;
}

.btn-predict::after {
  content: '→';
  margin-left: 8px;
  transition: var(--transition);
}

.btn-predict:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108,99,255,0.5);
}

.btn-predict:active { transform: translateY(0); }

/* ─── Divider ─────────────────────────────────── */
.form-divider {
  border: none;
  border-top: 1px solid var(--glass-border);
}

/* ─── Radio/Toggle groups (for sex/smoker) ────── */
.toggle-group {
  display: flex;
  gap: 10px;
}

.toggle-group input[type="radio"] { display: none; }

.toggle-group label {
  flex: 1;
  text-align: center;
  padding: 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: none;
  letter-spacing: 0;
  transition: var(--transition);
}

.toggle-group input[type="radio"]:checked + label {
  background: rgba(108,99,255,0.2);
  border-color: var(--primary);
  color: var(--primary-light);
}

.toggle-group label:hover {
  background: rgba(255,255,255,0.07);
  color: var(--text-primary);
}

/* ─── JS Validation states ───────────────────── */

/* Red ring on invalid inputs / selects */
.form-group input.field-error,
.form-group select.field-error {
  border-color: var(--danger) !important;
  background: rgba(239, 68, 68, 0.06) !important;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15) !important;
  animation: shake 0.35s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

/* Red border on invalid radio groups */
.toggle-group.group-error {
  border: 1px solid rgba(239, 68, 68, 0.4);
  border-radius: var(--radius-sm);
  padding: 4px;
  background: rgba(239, 68, 68, 0.04);
  animation: shake 0.35s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

/* Inline error message text */
.error-msg {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: #fca5a5;               /* soft red matches --danger */
  margin-top: 5px;
  padding-left: 2px;
  line-height: 1.4;
  animation: fadeInDown 0.2s ease;
}

/* Error text inside toggle groups */
.toggle-group .error-msg {
  width: 100%;
  margin-top: 6px;
  padding-left: 4px;
}

/* Subtle shake keyframe */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-5px); }
  40%       { transform: translateX(5px); }
  60%       { transform: translateX(-3px); }
  80%       { transform: translateX(3px); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Green ring when field is valid after being touched */
.form-group input.field-valid,
.form-group select.field-valid {
  border-color: rgba(34, 197, 94, 0.6) !important;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1) !important;
}