/* Base styles and reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2c3e50;
    --secondary-color: #e74c3c;
    --accent-color: #f1c40f;
    --text-color: #333;
    --text-light: #ecf0f1;
    --bg-light: #ffffff;
    --bg-dark: #34495e;
    --font-main: 'Helvetica Neue', Arial, sans-serif;
    --font-heading: 'Montserrat', sans-serif;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    margin-bottom: 1rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--secondary-color);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul {
    list-style: none;
}

section {
    padding: 100px 0;
}

.btn {
    display: inline-block;
    background-color: var(--secondary-color);
    color: white;
    padding: 12px 30px;
    border-radius: 4px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #c0392b;
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.btn-small {
    padding: 8px 20px;
    font-size: 0.9rem;
}

/* Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    padding: 0 50px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 50px;
    width: auto;
    transition: var(--transition);
}

.logo a:hover img {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    justify-content: space-between;
    width: 40%;
}

.nav-links li a {
    color: var(--primary-color);
    font-weight: 600;
    position: relative;
}

.nav-links li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--secondary-color);
    transition: var(--transition);
}

.nav-links li a:hover::after {
    width: 100%;
}

.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 5px;
    transition: var(--transition);
}

/* Hero Section */
#hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    color: var(--text-light);
    overflow: hidden;
}

#hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 1;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
}

.hero-bg-1 {
    background-image: url('../images/hero-bg-1.png');
    opacity: 1;
}

.hero-bg-2 {
    background-image: url('../images/hero-bg-2.png');
}

.hero-bg-3 {
    background-image: url('../images/hero-bg-3.png');
}

.hero-content {
    max-width: 800px;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.about-text p {
    margin-bottom: 1.5rem;
}

/* Projects Section */
.project-filter {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.filter-btn {
    background: none;
    border: none;
    padding: 10px 20px;
    margin: 0 5px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-color);
}

.filter-btn.active, .filter-btn:hover {
    color: var(--secondary-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.project-card {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.project-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover img {
    transform: scale(1.05);
}

.project-info {
    padding: 20px;
    background-color: var(--bg-light);
}

.project-info h3 {
    margin-bottom: 0.5rem;
}

.project-info p {
    margin-bottom: 1rem;
    color: #777;
}

/* Services Section */
#services {
    background-color: var(--bg-dark);
    color: var(--text-light);
}

#services h2::after {
    background-color: var(--accent-color);
}

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

.service-card {
    background-color: rgba(255, 255, 255, 0.05);
    padding: 30px;
    border-radius: 8px;
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-5px);
    background-color: rgba(255, 255, 255, 0.1);
}

.service-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.service-card h3 {
    margin-bottom: 1rem;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
}

.form-group textarea {
    resize: vertical;
}

.contact-info {
    padding-left: 50px;
}

.info-item {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.info-item .icon {
    width: 50px;
    height: 50px;
    background-color: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-right: 1rem;
    font-size: 1.2rem;
}

.social-links {
    display: flex;
    margin-top: 2rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-right: 1rem;
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 70px;
    margin-bottom: 50px;
}

.footer-logo p {
    margin-top: 1rem;
}

.footer-links h3, .footer-newsletter h3 {
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h3::after, .footer-newsletter h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--secondary-color);
}

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

.footer-links ul li a:hover {
    color: var(--secondary-color);
    padding-left: 5px;
}

.footer-newsletter form {
    display: flex;
}

.footer-newsletter input {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 4px 0 0 4px;
    font-family: inherit;
}

.footer-newsletter button {
    border-radius: 0 4px 4px 0;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media screen and (max-width: 1024px) {
    .nav-links {
        width: 60%;
    }
}

@media screen and (max-width: 768px) {
    .nav-links {
        position: absolute;
        right: 0;
        height: calc(100vh - 80px);
        top: 80px;
        background-color: rgba(255, 255, 255, 0.95);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: space-around;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        box-shadow: -5px 0 10px rgba(0, 0, 0, 0.1);
    }

    .nav-active {
        transform: translateX(0%);
    }

    .burger {
        display: block;
    }
    
    .logo img {
        height: 40px;
    }

    .about-content, .contact-content {
        grid-template-columns: 1fr;
    }

    .about-image::before {
        display: none;
    }

    .contact-info {
        padding-left: 0;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }
}

@media screen and (max-width: 480px) {
    .nav-links {
        width: 100%;
    }
    
    .logo img {
        height: 35px;
    }
    
    nav {
        padding: 0 20px;
    }

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

    .project-filter {
        flex-direction: column;
        align-items: center;
    }

    .filter-btn {
        margin-bottom: 10px;
    }

    .footer-newsletter form {
        flex-direction: column;
    }

    .footer-newsletter button {
        width: 100%;
        margin-top: 10px;
        border-radius: 4px;
    }
}