/* Import fontu */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

/* CSS Variables */
:root {
    --primary: #1a1a1a;
    --secondary: #ffffff;
    --accent: #00838F;
    --gray-light: #f5f5f5;
    --gray-medium: #e0e0e0;
    --gray-dark: #666666;
    --text: #333333;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    background-color: var(--secondary);
    line-height: 1.6;
    font-weight: 400;
    overflow-x: hidden;
}

/* Typography */
h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 300;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 300;
    letter-spacing: -0.01em;
    line-height: 1.2;
    margin-bottom: 2rem;
}

h3 {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    font-weight: 400;
    margin-bottom: 1rem;
}

h4 {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.8rem;
    color: var(--primary);
}

p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--gray-dark);
}

/* Layout */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

section {
    padding: 120px 0;
    position: relative;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

nav.scrolled {
    padding: 15px 0;
    border-bottom-color: var(--gray-medium);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

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

.nav-menu a {
    color: var(--text);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 400;
    transition: var(--transition);
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    width: 24px;
    height: 18px;
    justify-content: space-between;
}

.nav-toggle span {
    width: 100%;
    height: 1.5px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(to bottom, var(--gray-light), var(--secondary));
    padding-top: 80px;
}

.hero-content {
    text-align: center;
    max-width: 900px;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: 20px;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-weight: 500;
}

.hero-subtitle::after {
    content: '';
    display: block;
    width: 60px;
    height: 2px;
    background: var(--accent);
    margin: 20px auto;
}

.hero-title {
    margin-bottom: 30px;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--gray-dark);
    margin-bottom: 50px;
    font-weight: 300;
    line-height: 1.6;
}

.hero-cta {
    display: inline-flex;
    gap: 20px;
}

/* Buttons */
.btn {
    padding: 14px 32px;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    display: inline-block;
    letter-spacing: 0.5px;
}

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

.btn-primary:hover {
    background: var(--accent);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

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

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

.services-header {
    text-align: center;
    margin-bottom: 80px;
}

.services-header p {
    font-size: 1.1rem;
    margin-top: -1rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.service-card {
    background: var(--gray-light);
    padding: 60px 40px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 25px;
}

.service-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    font-weight: 400;
}

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

/* Portfolio Section - Updated */
.portfolio {
    background: var(--gray-light);
}

.portfolio-header {
    text-align: center;
    margin-bottom: 60px;
}

.portfolio-header p {
    font-size: 1.1rem;
    margin-top: -1rem;
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 10px 24px;
    background: transparent;
    border: 1px solid var(--gray-medium);
    color: var(--text);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
    font-weight: 400;
    letter-spacing: 0.5px;
}

.filter-tab:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.filter-tab.active {
    background: var(--primary);
    color: var(--secondary);
    border-color: var(--primary);
}

/* Category Sections */
.category-section {
    margin-bottom: 80px;
}

.category-title {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 40px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--accent);
    color: var(--primary);
}

/* Portfolio Grid for Stavby na klíč */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.portfolio-item.large {
    background: var(--secondary);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 350px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.portfolio-item.large:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.portfolio-item.large .portfolio-image {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-color: var(--gray-medium);
    position: relative;
    overflow: hidden;
}

.portfolio-item.large .portfolio-info {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.portfolio-item.large .portfolio-title {
    font-size: 1.5rem;
    color: var(--primary);
    font-weight: 400;
    margin-bottom: 20px;
}

.portfolio-item.large .portfolio-description {
    color: var(--gray-dark);
    line-height: 1.7;
    margin-bottom: 25px;
}

.portfolio-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    transition: var(--transition);
}

.portfolio-link:hover {
    transform: translateX(5px);
}

/* Work Categories Grid */
.work-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.work-category-card {
    background: var(--secondary);
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    position: relative;
}

.work-category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.work-category-image {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
    background-color: var(--gray-medium);
    position: relative;
    overflow: hidden;
}

.work-category-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.3));
    opacity: 0;
    transition: var(--transition);
}

.work-category-card:hover .work-category-image::after {
    opacity: 1;
}

.work-category-info {
    padding: 30px;
}

.work-category-info h4 {
    font-size: 1.3rem;
    font-weight: 400;
    color: var(--primary);
    margin-bottom: 10px;
}

.work-category-info p {
    color: var(--gray-dark);
    margin-bottom: 15px;
    line-height: 1.6;
}

.work-category-count {
    display: inline-block;
    padding: 5px 12px;
    background: var(--gray-light);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 20px;
}

/* Work Details Container */
.work-details-container {
    margin-top: 40px;
}

.work-detail-section {
    background: var(--secondary);
    border-radius: 8px;
    padding: 40px;
    margin-bottom: 30px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.work-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--gray-light);
}

.work-detail-header h4 {
    font-size: 1.8rem;
    font-weight: 300;
    color: var(--primary);
    margin: 0;
}

.work-detail-close {
    padding: 10px 20px;
    background: var(--gray-light);
    border: none;
    border-radius: 4px;
    color: var(--text);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
}

.work-detail-close:hover {
    background: var(--accent);
    color: var(--secondary);
}

/* Work Grid remains the same */
.work-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.work-item {
    background: var(--gray-light);
    overflow: hidden;
    border-radius: 4px;
    transition: var(--transition);
}

.work-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.work-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    cursor: zoom-in;
}

.work-item p {
    padding: 20px;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    padding: 20px;
    overflow-y: auto;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.modal-content {
    background: var(--secondary);
    max-width: 1000px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: var(--secondary);
    border: 1px solid var(--gray-medium);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--primary);
    color: var(--secondary);
}

.modal-gallery {
    width: 100%;
    height: 500px;
    background-size: cover;
    background-position: center;
    background-color: var(--gray-medium);
}

.modal-body {
    padding: 40px;
}

.modal-category {
    color: var(--accent);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 15px;
    font-weight: 500;
}

.modal-title {
    font-size: 2rem;
    margin-bottom: 25px;
    font-weight: 300;
}

.modal-description {
    color: var(--gray-dark);
    line-height: 1.7;
    margin-bottom: 30px;
}

.modal-images {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.modal-image {
    width: 100%;
    height: 250px;
    background-size: cover;
    background-position: center;
    background-color: var(--gray-medium);
}

/* About Section */
.about {
    background: var(--secondary);
}

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

.about-text h2 {
    margin-bottom: 30px;
}

.about-text p {
    margin-bottom: 20px;
}

.about-highlight {
    padding: 30px;
    background: var(--gray-light);
    border-left: 3px solid var(--accent);
    margin: 30px 0;
}

.about-highlight p {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text);
    margin: 0;
}

.about-image {
    position: relative;
    height: 500px;
    background-size: cover;
    background-position: center;
    background-color: var(--gray-medium);
}

/* Stats Section */
.stats {
    background: var(--primary);
    color: var(--secondary);
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 300;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
}

/* Contact Section */
.contact {
    background: var(--gray-light);
    text-align: center;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-title {
    margin-bottom: 20px;
}

.contact-info {
    margin-bottom: 40px;
}

.contact-info p {
    margin: 10px 0;
    font-size: 1.1rem;
}

.contact-info a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.contact-info a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background: var(--primary);
    color: var(--secondary);
    padding: 30px 0;
    text-align: center;
    font-size: 0.9rem;
}

footer a {
    color: var(--secondary);
    text-decoration: none;
    margin: 0 15px;
    opacity: 0.8;
    transition: var(--transition);
}

footer a:hover {
    opacity: 1;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-item.large {
        grid-template-columns: 1fr;
        min-height: auto;
    }
    
    .portfolio-item.large .portfolio-image {
        height: 300px;
    }
}

@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .modal-images {
        grid-template-columns: 1fr;
    }
    
    .work-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    section {
        padding: 80px 0;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--secondary);
        flex-direction: column;
        padding: 20px;
        gap: 20px;
        border-top: 1px solid var(--gray-medium);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }

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

    .nav-menu li {
        text-align: center;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .filter-tabs {
        gap: 10px;
    }

    .filter-tab {
        padding: 8px 16px;
        font-size: 0.9rem;
    }

    .modal-body {
        padding: 20px;
    }

    .modal-gallery {
        height: 300px;
    }
    
    .work-section {
        padding: 20px;
    }
    
    .work-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-description {
        font-size: 1rem;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }

    .service-card {
        padding: 40px 20px;
    }

    footer {
        padding: 20px;
    }

    footer div {
        margin-top: 10px;
    }

    footer a {
        display: block;
        margin: 5px 0;
    }
    
    .portfolio-item.large .portfolio-info {
        padding: 20px;
    }
    
    .category-title {
        font-size: 1.5rem;
    }
    
    .work-section-title {
        font-size: 1.2rem;
    }
}