/* Basis Reset und Variablen */
:root {
    --color-primary: #007bff;
    --color-dark: #333;
    --color-gray: #666;
    --color-light-gray: #f5f5f5;
    --color-white: #ffffff;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-dark);
    background: var(--color-white);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-dark);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    color: var(--color-gray);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

.admin-link {
    margin-left: auto;
}

.admin-link a {
    color: var(--color-primary);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-dark);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    overflow: hidden;
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: rgba(0,0,0,0.3);
}

.hero-title {
    font-size: clamp(40px, 8vw, 80px);
    font-weight: 300;
    color: var(--color-white);
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: clamp(18px, 3vw, 24px);
    color: var(--color-white);
    margin-bottom: 30px;
    font-weight: 300;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 16px;
}

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

.btn-primary:hover {
    background: #0056b3;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

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

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Sections */
.featured-projects,
.about-section {
    padding: 100px 0;
}

.section-title {
    font-size: 40px;
    font-weight: 300;
    margin-bottom: 60px;
    text-align: center;
    color: var(--color-dark);
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.project-card {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    overflow: hidden;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.project-card a {
    text-decoration: none;
    color: inherit;
}

.project-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

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

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent, rgba(0,0,0,0.5));
    display: flex;
    align-items: flex-end;
    padding: 20px;
}

.project-category {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 5px 15px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project-content {
    padding: 30px;
}

.project-content h3 {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 10px;
}

.project-location {
    color: var(--color-gray);
    font-size: 14px;
    margin-bottom: 15px;
}

.project-description {
    color: var(--color-gray);
    line-height: 1.6;
}

/* About Section */
.about-section {
    background: var(--color-light-gray);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-content h2 {
    font-size: 36px;
    font-weight: 300;
    margin-bottom: 30px;
}

.about-content p {
    color: var(--color-gray);
    margin-bottom: 20px;
}

.about-image img {
    width: 100%;
    height: auto;
    box-shadow: var(--shadow-lg);
}

/* CTA Section */
.cta-section {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 80px 0;
    text-align: center;
}

.cta-section h2 {
    font-size: 36px;
    font-weight: 300;
    margin-bottom: 20px;
}

.cta-section p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

/* Footer */
.footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: 60px 0 20px;
}

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

.footer h3 {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 20px;
}

.footer h4 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 15px;
}

.footer ul {
    list-style: none;
}

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

.footer a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.5);
}

/* Utilities */
.text-center { text-align: center; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* Logo in Navigation */
.navbar .logo img {
    height: 40px;
    width: auto;
    vertical-align: middle;
}

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