/* ========================================
   PProjects - Hlavní styly
   ======================================== */

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

/* CSS proměnné */
:root {
    /* Barvy */
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-card: #1e293b;
    --color-bg-card-hover: #293548;
    
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    
    --color-accent: #6366f1;
    --color-accent-hover: #4f46e5;
    --color-accent-light: rgba(99, 102, 241, 0.1);
    
    --color-border: #334155;
    --color-border-light: #475569;
    
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
}

/* Základní styly */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* Header */
.site-header {
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-accent) 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-left: var(--spacing-sm);
}

.header-nav {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
}

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

/* Hero Section */
.hero {
    padding: var(--spacing-3xl) 0;
    text-align: center;
    background: linear-gradient(180deg, transparent 0%, rgba(99, 102, 241, 0.05) 100%);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 1200px;
    margin: 0 auto;
}

/* Filters */
.filters-section {
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--color-border);
}

.filters {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

.filter-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.filter-icon {
    font-size: 1.1rem;
}

/* Projects Section */
.projects-section {
    padding: var(--spacing-3xl) 0;
    min-height: 60vh;
}

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

/* Project Card - Upravená struktura */
.project-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
    position: relative;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-accent);
    background: var(--color-bg-card-hover);
}

/* Obrázek karty - nyní klikatelný */
.card-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-border) 100%);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    transition: transform var(--transition-slow);
}

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

.card-image-placeholder {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    opacity: 0.3;
}

.status-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-success);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.card-content {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.project-year {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.project-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.tech-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-accent-light);
    color: #a5b4fc;
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(99, 102, 241, 0.2);
    transition: all var(--transition-base);
}

.tech-badge:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--color-accent);
}

.card-footer {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.highlights {
    display: flex;
    gap: var(--spacing-sm);
}

.highlight-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-accent-light);
    color: var(--color-accent);
    font-size: 0.9rem;
    transition: all var(--transition-base);
}

.highlight-icon:hover {
    transform: scale(1.1);
    background: rgba(99, 102, 241, 0.2);
}

/* Nová sekce pro akční tlačítka - UPRAVENÝ PADDING */
.card-actions {
    display: flex;
    gap: var(--spacing-md);
    padding: 0 var(--spacing-lg) var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* SJEDNOCENÝ STYL PRO VŠECHNA TLAČÍTKA */
.action-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-base);
    cursor: pointer;
    text-decoration: none;
    border: 1px solid var(--color-accent);
    background: var(--color-accent);
    color: white;
}

.action-btn:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Odstraněny rozdílné styly pro detail-btn a visit-btn */
.detail-btn,
.visit-btn {
    /* Nyní dědí vše z .action-btn */
}

.btn-arrow {
    font-size: 1rem;
    opacity: 0.8;
    transition: transform var(--transition-base);
}

.action-btn:hover .btn-arrow {
    transform: translate(2px, -2px);
}

/* Project Detail Section */
.project-detail-section {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-in-out;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    width: 100%;
}

.project-detail-section.active {
    max-height: none;
    padding: var(--spacing-3xl) var(--spacing-xl);
}

.project-detail-content {
    width: 100%;
}

.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-2xl);
}

.detail-header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* SJEDNOCENÝ STYL PRO TLAČÍTKO V DETAILU */
.btn-visit {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-accent);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--transition-base);
    border: 1px solid var(--color-accent);
}

.btn-visit:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-visit .btn-icon {
    font-size: 1rem;
    opacity: 0.8;
    transition: transform var(--transition-base);
}

.btn-visit:hover .btn-icon {
    transform: translate(2px, -2px);
}

.detail-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.detail-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

.detail-close-btn {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: 1.25rem;
}

.detail-close-btn:hover {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.detail-content-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.detail-main-image {
    width: 100%;
    height: 400px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-2xl);
    position: relative;
    cursor: pointer;
    transition: height var(--transition-slow);
    display: flex;
    flex-direction: column;
}

.detail-main-image.expanded {
    height: 80vh;
}

.image-wrapper {
    width: 100%;
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
}

.detail-main-image img {
    width: 100%;
    height: auto;
    min-height: 100%;
    object-fit: cover;
    object-position: top;
    transition: all var(--transition-slow);
}

.detail-main-image.expanded img {
    object-fit: contain;
    object-position: top center;
    min-height: auto;
}

/* Indikátor pro rozbalení */
.image-expand-indicator {
    position: sticky;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.7) 60%, transparent 100%);
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    color: white;
    opacity: 0;
    transition: opacity var(--transition-base);
    margin-top: -80px;
    pointer-events: none;
}

.detail-main-image:hover .image-expand-indicator {
    opacity: 1;
    pointer-events: all;
}

.expand-icon {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    backdrop-filter: blur(10px);
}

.expand-text {
    font-size: 0.9rem;
    font-weight: 500;
}

/* Scrollbar styling pro rozbalený obrázek */
.image-wrapper::-webkit-scrollbar {
    width: 8px;
}

.image-wrapper::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

.image-wrapper::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: 4px;
}

.image-wrapper::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-hover);
}

.detail-info-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.detail-description {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    text-align: left;
}

.detail-features {
    background: var(--color-bg-card);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.detail-features h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-item {
    display: flex;
    align-items: start;
    gap: var(--spacing-md);
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--color-accent-light);
    color: var(--color-accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-text {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.detail-tech-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.tech-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.tech-category {
    background: var(--color-bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.tech-category h4 {
    font-size: 1rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.tech-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.detail-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    padding-top: var(--spacing-xl);
}

/* Loading */
.loading {
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--color-text-secondary);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto var(--spacing-lg);
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Footer */
.site-footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-3xl);
}

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

.footer-left {
    color: var(--color-text-secondary);
}

.footer-right {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

/* Responsive design */
@media (max-width: 1024px) {
    .detail-content-grid {
        gap: var(--spacing-xl);
    }
    
    .detail-main-image {
        height: 350px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    /* OPRAVA: Header navigace zůstává viditelná */
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .logo {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .tagline {
        margin-left: 0;
        margin-top: var(--spacing-xs);
    }
    
    .header-nav {
        display: flex; /* Již není display: none! */
        gap: var(--spacing-md);
        flex-wrap: wrap;
        justify-content: center;
        margin-top: var(--spacing-md);
    }
    
    .nav-link {
        font-size: 0.875rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    /* Hero sekce */
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    /* Projekty */
    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .project-detail-section.active {
        padding: var(--spacing-2xl) var(--spacing-md);
    }
    
    /* Detail sekce */
    .detail-header {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .detail-header-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .detail-title {
        font-size: 1.75rem;
    }
    
    .detail-main-image {
        height: 250px;
    }
    
    .detail-features,
    .detail-tech-section {
        margin: 0;
    }
    
    .tech-categories {
        grid-template-columns: 1fr;
    }
    
    /* Responsive tlačítka v kartách */
    .card-actions {
        flex-direction: column;
    }
    
    .action-btn {
        width: 100%;
    }
}

/* Velmi malé obrazovky */
@media (max-width: 480px) {
    /* Navigace */
    .nav-link {
        font-size: 0.8rem;
    }
    
    /* Logo a hero */
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
    
    /* Filtry */
    .filters {
        gap: var(--spacing-sm);
    }
    
    .filter-btn {
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-md);
    }
    
    .filter-icon {
        font-size: 1rem;
    }
    
    /* Tech badges */
    .tech-badge {
        font-size: 0.75rem;
        padding: 2px 6px;
    }
}

/* Footer responsive */
@media (max-width: 640px) {
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-right {
        gap: var(--spacing-md);
    }
}

/* Utility classes */
.hidden {
    display: none;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }