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

html, body {
    width: 100%;
    overflow-x: hidden;
    font-family: 'Poppins', sans-serif;
    color: #14532d;
    scroll-behavior: smooth;
}

.navbar {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 2;
    background: rgba(0, 0, 0, 0.3);
}
.nav-links a {
    position: relative;
    color: white;
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
    padding-bottom: 4px;
    transition: color 0.3s ease;
}
.nav-links a::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    width: 100%;
    height: 2px;
    background-color: white;
    transition: transform 0.3s ease;
}
.nav-links a:hover::after {
    transform: translateX(-50%) scaleX(1);
}
.logo {
    font-size: 1.5em;
    font-weight: 600;
    color: white;
}

.calculator-hero {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://images.unsplash.com/photo-1613665813446-82a78c468a1d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    padding: 150px 5vw 100px;
    text-align: center;
    color: white;
}

.calculator-hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.calculator-hero-content p {
    font-size: 1.3rem;
    max-width: 700px;
    margin: 0 auto;
}

/* Calculator Form Section */
.calculator-form-section {
    background-color: #f4f4f4;
    padding: 80px 5vw 100px;
}

.calculator-form-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.form-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 50px;
    background-color: #14532d;
    position: relative;
}

.progress-step {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    z-index: 2;
    transition: all 0.3s ease;
}

.progress-step.active {
    background-color: #8bc34a;
    transform: scale(1.1);
}

.progress-line {
    flex-grow: 1;
    height: 2px;
    background-color: rgba(255, 255, 255, 0.3);
    position: relative;
    z-index: 1;
}

.form-step {
    padding: 40px 50px;
    display: none;
}

.form-step.active-step {
    display: block;
}

.form-step h2 {
    font-size: 1.8rem;
    color: #14532d;
    margin-bottom: 30px;
    text-align: center;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #2e7d32;
}

.form-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

.form-navigation button {
    padding: 12px 24px;
    background-color: #14532d;
    color: white;
    border: none;
    border-radius: 30px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.form-navigation button:hover {
    background-color: #2e7d32;
    transform: translateY(-2px);
}

.form-navigation button.prev-step {
    background-color: #777;
}

.form-navigation button.prev-step:hover {
    background-color: #555;
}

.calculate-btn {
    background-color: #8bc34a !important;
}

.calculate-btn:hover {
    background-color: #7cb342 !important;
}

.review-section {
    background-color: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
}

.review-section h3 {
    font-size: 1.3rem;
    color: #14532d;
    margin-bottom: 15px;
}

.review-item {
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.review-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

/* Calculator Results */
.calculator-results {
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.result-header {
    background-color: #14532d;
    color: white;
    padding: 40px;
    text-align: center;
}

.result-header h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.result-score {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.result-unit {
    font-size: 1.2rem;
    font-weight: normal;
}

.result-comparison {
    font-size: 1.1rem;
    opacity: 0.9;
}

.result-breakdown {
    padding: 40px;
}

.result-breakdown h3 {
    font-size: 1.5rem;
    color: #14532d;
    margin-bottom: 25px;
    text-align: center;
}

.breakdown-chart {
    margin-bottom: 20px;
}

.chart-item {
    margin-bottom: 20px;
}

.chart-label {
    font-weight: 500;
    margin-bottom: 8px;
    color: #333;
}

.chart-bar {
    height: 20px;
    background-color: #eee;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 8px;
}

.chart-fill {
    height: 100%;
    background-color: #2e7d32;
    border-radius: 10px;
    transition: width 1s ease;
}

.chart-value {
    font-weight: 500;
    color: #555;
}

.result-tips {
    padding: 0 40px 40px;
}

.result-tips h3 {
    font-size: 1.5rem;
    color: #14532d;
    margin-bottom: 25px;
    text-align: center;
}

.tips-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.tip-item {
    background-color: #f9f9f9;
    border-radius: 8px;
    padding: 20px;
    border-left: 4px solid #2e7d32;
}

.tip-category {
    font-weight: bold;
    color: #2e7d32;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.tip-text {
    color: #555;
    line-height: 1.5;
}

.result-actions {
    padding: 30px 40px;
    background-color: #f9f9f9;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.result-actions button {
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.result-actions .hero-button {
    background-color: #14532d;
    color: white;
    border: none;
}

.result-actions .hero-button:hover {
    background-color: #2e7d32;
    transform: translateY(-2px);
}

.result-actions .hero-button.secondary {
    background-color: white;
    color: #14532d;
    border: 1px solid #14532d;
}

.result-actions .hero-button.secondary:hover {
    background-color: #f0f0f0;
}

@media (max-width: 768px) {
    .calculator-hero {
        padding: 100px 5vw 60px;
    }
    
    .calculator-hero-content h1 {
        font-size: 2.2rem;
    }
    
    .calculator-hero-content p {
        font-size: 1.1rem;
    }
    
    .form-progress {
        padding: 20px 30px;
    }
    
    .form-step {
        padding: 30px;
    }
    
    .result-header {
        padding: 30px 20px;
    }
    
    .result-score {
        font-size: 2.8rem;
    }
    
    .result-breakdown,
    .result-tips {
        padding: 30px 20px;
    }
    
    .result-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .result-actions button {
        width: 100%;
        max-width: 300px;
    }
}

/* Footer */
.footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 30px 0;
    font-size: 0.9em;
}