/* General Styles */
:root {
    --primary-color: #007bff; /* Blue */
    --secondary-color: #6c757d; /* Grey */
    --accent-color: #28a745; /* Green for featured */
    --light-bg: #f8f9fa;
    --dark-bg: #343a40;
    --text-color: #333;
    --light-text-color: #fff;
    --border-color: #dee2e6;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-bg);
}

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

h1, h2, h3 {
    margin-bottom: 1rem;
    font-weight: 700;
}

h1 {
    font-size: 3.5rem;
    color: var(--light-text-color);
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 2.5rem;
    color: var(--dark-bg);
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.button {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 5px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease;
    border: none;
}

.primary-button {
    background-color: var(--primary-color);
    color: var(--light-text-color);
}

.primary-button:hover {
    background-color: #0056b3;
    color: var(--light-text-color);
    text-decoration: none;
}

.secondary-button {
    background-color: var(--secondary-color);
    color: var(--light-text-color);
}

.secondary-button:hover {
    background-color: #545b62;
    color: var(--light-text-color);
    text-decoration: none;
}

.large-button {
    padding: 15px 30px;
    font-size: 1.2rem;
    margin-top: 2rem;
}

/* Header - Hero Section */
.hero-section {
    background-color: var(--primary-color);
    color: var(--light-text-color);
    padding: 100px 0;
    text-align: center;
    background-image: linear-gradient(rgba(0, 123, 255, 0.8), rgba(0, 123, 255, 0.8)); /* Colored overlay */
}

.hero-section .subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    font-weight: 400;
}

/* Tariffs Section */
.tariffs-section {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.tariff-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 3rem;
}

.tariff-card {
    background-color: var(--light-text-color);
    border-radius: 8px;
    box-shadow: 0 4px 15px var(--shadow-color);
    padding: 30px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tariff-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px var(--shadow-color);
}

.tariff-card h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.tariff-card .price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-bg);
    margin-bottom: 1.5rem;
}

.tariff-card ul {
    list-style: none;
    padding: 0;
    margin-bottom: 2rem;
    text-align: left;
    flex-grow: 1;
}

.tariff-card ul li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.1rem;
}

.tariff-card ul li:last-child {
    border-bottom: none;
}

.tariff-card.featured {
    background-color: var(--accent-color);
    color: var(--light-text-color);
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(40, 167, 69, 0.3);
}

.tariff-card.featured h3 {
    color: var(--light-text-color);
}

.tariff-card.featured .price {
    color: var(--light-text-color);
}

.tariff-card.featured ul li {
    border-bottom-color: rgba(255, 255, 255, 0.3);
}

/* Contact Section */
.contact-section {
    background-color: var(--dark-bg);
    color: var(--light-text-color);
    padding: 80px 0;
    text-align: center;
}

.contact-section h2 {
    color: var(--light-text-color);
}

.contact-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    margin-top: 3rem;
}

.info-block {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 25px 35px;
    border-radius: 8px;
    flex: 1 1 280px;
    max-width: 350px;
}

.info-block h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.info-block p {
    font-size: 1.15rem;
    margin-bottom: 0;
}

.info-block a {
    color: var(--light-text-color);
    text-decoration: none;
}

.info-block a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background-color: #212529;
    color: #adb5bd;
    padding: 30px 0;
    text-align: center;
    font-size: 0.9rem;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .hero-section {
        padding: 80px 0;
    }

    .tariff-cards {
        grid-template-columns: 1fr;
    }

    .tariff-card.featured {
        transform: scale(1);
    }

    .contact-info {
        flex-direction: column;
        align-items: center;
    }

    .info-block {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-section .subtitle {
        font-size: 1.2rem;
    }

    .button {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .large-button {
        padding: 12px 25px;
        font-size: 1rem;
    }

    .tariff-card .price {
        font-size: 2rem;
    }
}