:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #f59e0b;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

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

/* Navigation */
.navbar {
    background-color: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo h1 {
    font-size: 28px;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 120px 20px;
    text-align: center;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content h2 {
    font-size: 56px;
    margin-bottom: 20px;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-content p {
    font-size: 24px;
    margin-bottom: 30px;
    opacity: 0.95;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: #d97706;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Services Section */
.services {
    padding: 80px 20px;
    background-color: var(--bg-light);
}

.services h2,
.portfolio h2,
.about h2,
.contact h2 {
    text-align: center;
    font-size: 42px;
    margin-bottom: 60px;
    color: var(--text-dark);
    position: relative;
    padding-bottom: 20px;
}

.services h2::after,
.portfolio h2::after,
.about h2::after,
.contact h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--bg-white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.service-card p {
    color: var(--text-light);
    margin-bottom: 25px;
    line-height: 1.8;
}

.features-list {
    list-style: none;
    text-align: left;
    background-color: var(--bg-light);
    padding: 15px;
    border-radius: 5px;
    font-size: 14px;
}

.features-list li {
    padding: 8px 0;
    color: var(--text-light);
    border-bottom: 1px solid var(--border-color);
}

.features-list li:last-child {
    border-bottom: none;
}

.features-list li::before {
    content: '✓ ';
    color: var(--primary-color);
    font-weight: bold;
    margin-right: 8px;
}

/* Portfolio Section */
.portfolio {
    padding: 80px 20px;
}

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

.portfolio-item {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.portfolio-item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.portfolio-placeholder {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    height: 250px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    gap: 15px;
}

.portfolio-placeholder p {
    font-size: 18px;
    font-weight: 600;
}

/* About Section */
.about {
    padding: 80px 20px;
    background-color: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 16px;
}

.advantages-list {
    list-style: none;
    margin-top: 20px;
}

.advantages-list li {
    padding: 12px 0;
    color: var(--text-dark);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 12px;
}

.advantages-list i {
    color: var(--accent-color);
    font-size: 20px;
}

.image-placeholder {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    font-size: 80px;
    gap: 20px;
}

.image-placeholder p {
    font-size: 24px;
    font-weight: 600;
}

/* Contact Section */
.contact {
    padding: 80px 20px;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-info h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.info-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.info-item i {
    font-size: 28px;
    color: var(--primary-color);
    width: 40px;
    text-align: center;
    margin-top: 5px;
}

.info-item h4 {
    font-size: 16px;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.info-item p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
}

.info-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.info-item a:hover {
    color: var(--accent-color);
}

.contact-form {
    background-color: var(--bg-light);
    padding: 40px;
    border-radius: 10px;
}

.contact-form h3 {
    font-size: 28px;
    margin-bottom: 30px;
    color: var(--text-dark);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-family: inherit;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.contact-form .btn {
    width: 100%;
    margin-top: 10px;
}

/* Footer */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: 60px 20px 20px;
}

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

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.footer-section p {
    color: #d1d5db;
    line-height: 1.6;
}

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

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

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--accent-color);
}

.social-links {
    display: flex;
    gap: 20px;
    font-size: 24px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #9ca3af;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--bg-white);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .hero-content h2 {
        font-size: 36px;
    }

    .hero-content p {
        font-size: 18px;
    }

    .services h2,
    .portfolio h2,
    .about h2,
    .contact h2 {
        font-size: 32px;
        margin-bottom: 40px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .image-placeholder {
        height: 300px;
    }

    .services-grid,
    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 22px;
    }

    .hero-content h2 {
        font-size: 28px;
    }

    .hero-content p {
        font-size: 16px;
    }

    .hero {
        padding: 60px 20px;
        min-height: 400px;
    }

    .services h2,
    .portfolio h2,
    .about h2,
    .contact h2 {
        font-size: 24px;
    }

    .service-card,
    .contact-form {
        padding: 25px;
    }

    .about-text h3,
    .contact-info h3,
    .contact-form h3 {
        font-size: 22px;
    }

    .footer-section h4 {
        font-size: 16px;
    }
}