:root {
    --primary: #4361ee;
    --secondary: #3f37c9;
    --accent: #f72585;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7ff;
    color: var(--dark);
    line-height: 1.6;
}

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



/* Hero Section */
.hero {
    text-align: center;
    padding: 60px 0;
    background: linear-gradient(135deg, #4361ee, #3a0ca3);
    color: white;
    border-radius: 0 0 20px 20px;
    margin-bottom: 40px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.hero p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 30px;
    opacity: 0.9;
}

.search-box {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 15px 20px;
    border-radius: 50px;
    border: none;
    font-size: 16px;
    box-shadow: var(--shadow);
}

.search-box button {
    position: absolute;
    right: 5px;
    top: 5px;
    background: var(--accent);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
}

/* Calculator Categories */
.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.section-title p {
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto;
}

.categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 60px;
}

.category-card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
    text-align: center;
}

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

.category-icon {
    font-size: 40px;
    color: var(--primary);
    margin-bottom: 15px;
}

.category-card h3 {
    margin-bottom: 10px;
    color: var(--dark);
}

.category-card p {
    color: var(--gray);
    margin-bottom: 20px;
}

.category-card a {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.3s;
}

.category-card a:hover {
    background: var(--secondary);
}

/* Popular Calculators */
.popular-calculators {
    margin-bottom: 60px;
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.calculator-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

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

.calculator-card h3 {
    margin-bottom: 15px;
    color: var(--primary);
}

.calculator-card p {
    color: var(--gray);
    margin-bottom: 20px;
}

.calculator-card a {
    display: inline-block;
    color: var(--primary);
    font-weight: 500;
    text-decoration: none;
    transition: color 0.3s;
}

.calculator-card a:hover {
    color: var(--secondary);
}

.calculator-card a i {
    margin-left: 5px;
}

/* Features */
.features {
    background: white;
    padding: 60px 0;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

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

.feature-icon {
    font-size: 40px;
    color: var(--primary);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--gray);
}

/* Add Container */        
.ad-container {
    margin: 30px 0;
    text-align: center;
    background: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.ad-label {
    font-size: 12px;
    color: var(--light-text);
    margin-bottom: 5px;
    text-transform: uppercase;
}

/* Article styles */
.article {
    background: white;
    padding: 40px 0;
    margin-bottom: 60px;
    margin-left: 60px;
}

h1 {
    color: #2c3e50;
}
.cta-buttons {
    margin-top: 30px;
}
.cta-button {
    display: inline-block;
    padding: 10px 20px;
    margin-right: 10px;
    background-color: #3498db;
    color: white !important;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
}
.cta-button:hover {
    background-color: #2980b9;
    color: white !important;
}


@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }
    
    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }
}