/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-blue: #0066cc;
    --text-black: #1a1a1a;
    --background-white: #ffffff;
    --light-gray: #f5f5f5;
    --medium-gray: #e0e0e0;
}

html {
    scroll-behavior: smooth;
    scroll-snap-type: y mandatory;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-black);
    background: var(--background-white);
    line-height: 1.6;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--medium-gray);
}

header nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

header nav img {
    height: 64px;
    width: auto;
}

header nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

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

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

header .language-switcher {
    position: relative;
}

header .lang-btn {
    padding: 0.25rem 0.75rem;
    border: 1px solid var(--medium-gray);
    border-radius: 4px;
    font-size: 0.9rem;
    background: var(--white);
    cursor: pointer;
}

header .lang-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border: 1px solid var(--medium-gray);
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    z-index: 100;
    min-width: 60px;
}

header .language-switcher:hover .lang-dropdown {
    display: block;
}

header .lang-dropdown a {
    display: block;
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
    text-decoration: none;
}

header .lang-dropdown a:hover {
    background: var(--light-gray);
}

header .lang-dropdown a.current {
    font-weight: bold;
    pointer-events: none;
}

/* Main Content */
main {
    margin-top: 65px;
}

/* Section Styles */
section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 4rem 2rem;
    scroll-snap-align: start;
}

section:nth-child(even) {
    background: var(--light-gray);
}

.section-content {
    max-width: 1200px;
    width: 100%;
}

/* Hero Section */
.hero {
    text-align: center;
}

.hero .logo {
    max-width: 400px;
    width: 100%;
    height: auto;
    margin-bottom: 1rem;
    margin-top: -1rem;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-black);
}

.hero p {
    font-size: 1.5rem;
    color: #666;
    margin-bottom: 2rem;
}

.hero .cta {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--primary-blue);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: background 0.3s ease, transform 0.2s ease;
}

.hero .cta:hover {
    background: #0052a3;
    transform: translateY(-2px);
}

/* Services Section */
.services {
    background: var(--light-gray);
}

.services h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    color: var(--text-black);
}

.service-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    width: 100%;
}

.service-list article {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-list article:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px rgba(0, 102, 204, 0.2);
}

.service-list h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-blue);
}

.service-list h3 a {
    color: var(--primary-blue);
    text-decoration: none;
}

.service-list p {
    color: #666;
    line-height: 1.8;
}

/* About Section */
.about {
    background: white;
}

.about h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
}

.about .content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
    color: #444;
}

/* Projects Section */
.projects h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
}

.project-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    width: 100%;
}

.project-list article {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.project-list article:hover {
    transform: translateY(-4px);
}

.project-list img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.project-list .project-content {
    padding: 1.5rem;
}

.project-list h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-black);
}

/* Footer */
footer {
    background: var(--text-black);
    color: white;
    padding: 3rem 2rem 1rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

footer h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

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

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

footer ul {
    list-style: none;
}

footer li {
    margin-bottom: 0.5rem;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid #444;
    text-align: center;
    color: #888;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator::before {
    content: "↓";
    font-size: 2rem;
    color: var(--primary-blue);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Responsive */
@media (max-width: 768px) {
    header nav {
        flex-direction: column;
        gap: 1rem;
    }

    header nav ul {
        gap: 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.2rem;
    }

    section {
        min-height: auto;
        padding: 3rem 1rem;
    }

    .service-list,
    .project-list {
        grid-template-columns: 1fr;
    }
}