.calc-form {
  max-width: 400px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  font-size: 16px;
  color: var(--color-text);
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.input-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.calc-btn {
  background: var(--color-primary);
  color: white;
  border: none;
  padding: 14px;
  border-radius: 10px;
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: background 0.2s, transform 0.1s;
}

.calc-btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

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

/* Result */
.bmi-result {
  display: none;
  margin-top: 24px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.bmi-highlight {
  text-align: center;
  padding: 24px;
  margin-bottom: 16px;
}

.bmi-value {
  font-size: 56px;
  font-weight: 800;
  line-height: 1;
}

.bmi-label {
  font-size: 20px;
  font-weight: 600;
  margin-top: 8px;
}

.bmi-advice {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: 12px;
  line-height: 1.5;
}

/* Gauge */
.bmi-gauge {
  margin: 20px 0;
  position: relative;
}

.gauge-bar {
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(to right,
    #3b82f6 0%,
    #16a34a 28%,
    #d97706 43%,
    #ea580c 50%,
    #dc2626 67%,
    #991b1b 100%
  );
}

.gauge-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.gauge-pointer {
  position: absolute;
  top: -4px;
  width: 20px;
  height: 20px;
  background: var(--color-text);
  border: 3px solid white;
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
  transition: left 0.5s ease;
}

/* Info cards */
.bmi-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.bmi-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 14px;
  text-align: center;
}

.bmi-card .value {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}

.bmi-card .label {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

@media (max-width: 640px) {
  .bmi-value {
    font-size: 44px;
  }

  .bmi-cards {
    grid-template-columns: 1fr;
  }

  .input-row {
    grid-template-columns: 1fr;
  }
}