:root {
    --primary: #ff4d4d;
    --secondary: #00ffaa;
    --dark: #121212;
    --darker: #0a0a0a;
    --light: #f8f9fa;
    --gray: #2a2a2a;
    --font-main: 'Montserrat', sans-serif;
    --font-heading: 'Oswald', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    color: var(--light);
    background-color: var(--dark);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    background-color: var(--darker);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

header {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    padding: 30px;
    text-align: center;
}

header h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

header p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.calculator-container {
    display: flex;
    flex-wrap: wrap;
    padding: 20px;
}

.input-section {
    flex: 1;
    min-width: 300px;
    padding: 20px;
    background-color: var(--gray);
    border-radius: 8px;
    margin: 10px;
}

.result-section {
    flex: 1;
    min-width: 300px;
    padding: 20px;
    margin: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

h2 {
    font-family: var(--font-heading);
    color: var(--primary);
    margin-bottom: 20px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 2px solid var(--primary);
    padding-bottom: 10px;
}

h3 {
    color: var(--secondary);
    margin-bottom: 15px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

input, select {
    width: 100%;
    padding: 12px 15px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    color: white;
    font-family: var(--font-main);
}

/* Fix dropdown colors */
select {
    background-color: var(--darker) !important;
    color: var(--light) !important;
}

select option {
    background-color: var(--darker);
    color: var(--light);
    padding: 10px;
}

.btn {
    display: block;
    width: 100%;
    padding: 15px;
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 4px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 20px;
    text-align: center;
    text-decoration: none;
}

.btn:hover {
    background-color: #e03c3c;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--secondary);
    color: var(--darker);
}

.btn-secondary:hover {
    background-color: #00e096;
}

.result-card {
    background-color: var(--gray);
    border-radius: 8px;
    padding: 25px;
    text-align: center;
    margin-bottom: 20px;
}

.calorie-result {
    margin-bottom: 25px;
}

.calorie-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--secondary);
    margin: 10px 0;
}

.calorie-label {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.7);
}

.macronutrients {
    margin-bottom: 25px;
}

.macro-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-top: 15px;
}

.macro-item {
    background-color: var(--darker);
    padding: 15px;
    border-radius: 8px;
    text-align: center;
}

.macro-icon {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: var(--secondary);
}

.macro-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--light);
    margin-bottom: 5px;
}

.macro-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.detailed-nutrition {
    margin-bottom: 20px;
}

.nutrition-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 15px;
}

.nutrition-item {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    background-color: var(--darker);
    border-radius: 6px;
}

.nutrition-label {
    font-weight: 600;
}

.nutrition-value {
    color: var(--secondary);
    font-weight: 600;
}

.recommendations {
    background-color: var(--gray);
    border-radius: 8px;
    padding: 20px;
}

.recommendations ul {
    padding-left: 20px;
}

.recommendations li {
    margin-bottom: 10px;
}

.navigation {
    padding: 20px;
    text-align: center;
}

@media (max-width: 768px) {
    .calculator-container {
        flex-direction: column;
    }
    
    .input-section, .result-section {
        margin: 10px 0;
    }
    
    .macro-grid {
        grid-template-columns: 1fr;
    }
    
    .nutrition-grid {
        grid-template-columns: 1fr;
    }
}