.bmi-calculator {
    padding: 100px 0 50px;
    max-width: 1000px;
    margin: 0 auto;
}

.calculator-header {
    text-align: center;
    margin-bottom: 3rem;
}

.calculator-header h1 {
    font-size: 2.5rem;
    color: var(--electric-blue);
    margin-bottom: 1rem;
}

.calculator-header p {
    color: var(--text-gray);
    font-size: 1.2rem;
}

.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.input-section {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 2px solid var(--electric-blue);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--electric-blue);
    font-weight: 500;
}

.input-wrapper {
    display: flex;
    gap: 0.5rem;
}

.input-wrapper input {
    flex: 1;
    padding: 0.8rem;
    border: 2px solid var(--navy-blue);
    border-radius: 8px;
    background: var(--dark-bg);
    color: var(--text-light);
    font-size: 1rem;
}

.input-wrapper select {
    padding: 0.8rem;
    border: 2px solid var(--navy-blue);
    border-radius: 8px;
    background: var(--dark-bg);
    color: var(--text-light);
    font-size: 1rem;
    min-width: 80px;
}

.input-wrapper input:focus,
.input-wrapper select:focus {
    outline: none;
    border-color: var(--electric-blue);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.result-section {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 2px solid var(--electric-blue);
}

.bmi-display {
    text-align: center;
    margin-bottom: 2rem;
}

.bmi-value {
    font-size: 3rem;
    font-weight: 900;
    color: var(--electric-blue);
    font-family: 'Orbitron', monospace;
}

.bmi-category {
    font-size: 1.2rem;
    margin-top: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    display: inline-block;
}

.bmi-category.underweight {
    background: rgba(135, 206, 235, 0.2);
    color: #87CEEB;
}

.bmi-category.normal {
    background: rgba(0, 255, 0, 0.2);
    color: #00FF00;
}

.bmi-category.overweight {
    background: rgba(255, 165, 0, 0.2);
    color: #FFA500;
}

.bmi-category.obese {
    color: #ff4757;
}

.bmi-category.caseoh {
    color: #ff6b35;
    font-weight: bold;
    text-shadow: 0 0 10px #ff6b35;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.bmi-meter {
    margin: 2rem 0;
}

.meter-container {
    position: relative;
    height: 20px;
    margin-bottom: 1rem;
}

.meter-bar {
    display: flex;
    height: 100%;
    border-radius: 10px;
    overflow: hidden;
}

.meter-segment {
    flex: 1;
    height: 100%;
}

.meter-segment.underweight {
    background: #87CEEB;
}

.meter-segment.normal {
    background: #00FF00;
}

.meter-segment.overweight {
    background: #FFA500;
}

.meter-segment.obese {
    background: #FF0000;
}

.meter-pointer {
    position: absolute;
    top: -5px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 15px solid var(--electric-blue);
    transform: translateX(-50%);
    transition: left 0.5s ease;
}

.meter-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-gray);
}

.health-tips {
    margin-top: 2rem;
}

.health-tips h3 {
    color: var(--electric-blue);
    margin-bottom: 1rem;
}

.tips-content {
    background: var(--navy-blue);
    padding: 1rem;
    border-radius: 8px;
    line-height: 1.6;
}

.tips-content ul {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.tips-content li {
    margin-bottom: 0.5rem;
}

@media (max-width: 768px) {
    .calculator-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .calculator-header h1 {
        font-size: 2rem;
    }

    .input-wrapper {
        flex-direction: column;
    }

    .input-wrapper select {
        min-width: auto;
    }
}