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

:root {
    --primary: #0056b3;
    --primary-light: #e8f0fe;
    --secondary: #f8f9fa;
    --text: #333;
    --white: #fff;
    --gray: #6c757d;
}

body {
    color: var(--text);
    line-height: 1.6;
}

/* Header */
header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
}

.logo span {
    color: #ff6b00;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
}

nav a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--primary);
}

.lang-switcher {
    display: flex;
    gap: 10px;
}

.lang-btn {
    padding: 5px 12px;
    border: 1px solid var(--primary);
    background: transparent;
    color: var(--primary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.lang-btn.active {
    background: var(--primary);
    color: var(--white);
}

.auth-btn {
    padding: 8px 20px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
}

/* Hero */
.hero {
    background: linear-gradient(rgba(0,86,179,0.9), rgba(0,86,179,0.8)), url('../img/hero-bg.jpg') center/cover;
    color: var(--white);
    padding: 80px 20px;
    text-align: center;
}

.hero h1 {
    font-size: 42px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    max-width: 800px;
    margin: 0 auto 40px;
}

.tracking-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    gap: 10px;
}

.tracking-form input {
    flex: 1;
    padding: 15px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
}

.tracking-form button {
    padding: 15px 30px;
    background: #ff6b00;
    color: var(--white);
    border: none;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
}

/* Sections */
section {
    padding: 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: 32px;
    color: var(--primary);
    margin-bottom: 40px;
    text-align: center;
}

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

.service-card {
    background: var(--secondary);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
}

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

/* Footer */
footer {
    background: #1a1a1a;
    color: var(--white);
    padding: 60px 20px 30px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-col h4 {
    margin-bottom: 20px;
    font-size: 18px;
}

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

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

.footer-col a {
    color: #ccc;
    text-decoration: none;
}

.footer-col a:hover {
    color: var(--white);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: #333;
    border-radius: 50%;
    text-align: center;
    line-height: 40px;
    color: var(--white);
    text-decoration: none;
}

.copyright {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #333;
    color: #999;
    font-size: 14px;
}

/* Calculator */
.calculator-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    background: var(--secondary);
    padding: 30px;
    border-radius: 8px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input, .form-group select {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

/* Tariffs table */
.tariffs-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 30px;
}

.tariffs-table th, .tariffs-table td {
    padding: 15px;
    border: 1px solid #ddd;
    text-align: left;
}

.tariffs-table th {
    background: var(--primary);
    color: var(--white);
}

.tariffs-table tr:nth-child(even) {
    background: var(--secondary);
}

/* Mobile menu */
.menu-toggle {
    display: none;
    font-size: 24px;
    background: none;
    border: none;
    cursor: pointer;
}

@media (max-width: 768px) {
    nav {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        padding: 20px;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
    }
    
    nav.active {
        display: block;
    }
    
    nav ul {
        flex-direction: column;
        gap: 15px;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .tracking-form {
        flex-direction: column;
    }
    
    .hero h1 {
        font-size: 32px;
    }
}