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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 60px 0;
}

.header h1 {
    font-size: 3.5em;
    margin-bottom: 10px;
    font-weight: 300;
}

.tagline {
    font-size: 1.4em;
    opacity: 0.9;
}

/* Hero Section */
.hero {
    background: #f8f9fa;
    padding: 80px 0;
    text-align: center;
}

.hero h2 {
    font-size: 2.5em;
    margin-bottom: 20px;
    color: #2c3e50;
}

.hero p {
    font-size: 1.2em;
    color: #7f8c8d;
}

/* Calculators Grid */
.calculators-grid {
    padding: 80px 0;
}

.calculators-grid h3 {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 50px;
    color: #2c3e50;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.calculator-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    border: 2px solid transparent;
}

.calculator-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.calculator-card.popular {
    border-color: #667eea;
}

.badge {
    position: absolute;
    top: -10px;
    right: 20px;
    background: #667eea;
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9em;
    font-weight: bold;
}

.calculator-card h4 {
    font-size: 1.5em;
    margin-bottom: 15px;
    color: #2c3e50;
}

.calculator-card p {
    margin-bottom: 25px;
    color: #7f8c8d;
    line-height: 1.6;
}

.btn {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: 600;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* Reviews Section */
.reviews-section {
    background: #f8f9fa;
    padding: 80px 0;
}

.reviews-section h3 {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 50px;
    color: #2c3e50;
}

.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.review-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.review-card.featured {
    border: 2px solid #f39c12;
}

.review-card:hover {
    transform: translateY(-5px);
}

.review-card h4 {
    font-size: 1.5em;
    margin-bottom: 15px;
    color: #2c3e50;
}

.btn-review {
    display: inline-block;
    background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%);
    color: white;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: 600;
}

.btn-review:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(243, 156, 18, 0.4);
}

/* Why Us Section */
.why-us {
    padding: 80px 0;
}

.why-us h3 {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 50px;
    color: #2c3e50;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.feature {
    text-align: center;
}

.feature-icon {
    font-size: 3em;
    margin-bottom: 20px;
}

.feature h4 {
    font-size: 1.3em;
    margin-bottom: 15px;
    color: #2c3e50;
}

.feature p {
    color: #7f8c8d;
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 80px 0;
}

.cta h3 {
    font-size: 2.5em;
    margin-bottom: 20px;
}

.cta p {
    font-size: 1.2em;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn-primary {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1.1em;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(255,255,255,0.3);
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    margin-bottom: 20px;
    font-size: 1.2em;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 20px;
    text-align: center;
    color: #bdc3c7;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .header h1 {
        font-size: 2.5em;
    }
    
    .hero h2 {
        font-size: 2em;
    }
    
    .calculators-grid h3,
    .reviews-section h3,
    .why-us h3,
    .cta h3 {
        font-size: 2em;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 15px;
    }
}