/* ========================================
   Letorost.art - Portfolio práce se dřevem
   ======================================== */

/* CSS proměnné */
:root {
    --color-bg: #1a1612;
    --color-bg-alt: #241f1a;
    --color-text: #e8e0d5;
    --color-text-muted: #a89f94;
    --color-accent: #8b6f4e;
    --color-accent-light: #b8956e;
    --color-wood-dark: #3d2e1f;
    --color-wood-medium: #5c4530;
    --color-wood-light: #8b6f4e;

    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-heading: Georgia, 'Times New Roman', serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    --transition: 0.3s ease;
    --border-radius: 8px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
}

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

a:hover {
    color: var(--color-text);
}

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

/* Kontejner */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   Navigace
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(26, 22, 18, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-wood-dark);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-accent-light);
    font-weight: bold;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-menu a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent-light);
    transition: width var(--transition);
}

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

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

/* Hamburger menu */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

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

/* ========================================
   Hero sekce
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(26, 22, 18, 0.6), rgba(26, 22, 18, 0.8)),
                url('../images/gallery/drevo/joel-jasmin-forestbird-xzPMUMDDsfk-unsplash.jpg') center/cover no-repeat;
    background-color: var(--color-wood-dark);
}

.hero-content {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 10vw, 6rem);
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.1em;
}

.hero p {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-accent);
    color: var(--color-text);
    border-radius: var(--border-radius);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.9rem;
    transition: background-color var(--transition), transform var(--transition);
}

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

/* ========================================
   Sekce
   ======================================== */
.section {
    padding: var(--spacing-xl) 0;
}

.section-alt {
    background-color: var(--color-bg-alt);
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--color-accent-light);
    text-align: center;
    margin-bottom: var(--spacing-xs);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

/* ========================================
   Galerie
   ======================================== */
.gallery-categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.gallery-category {
    display: block;
    background-color: var(--color-wood-dark);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
    text-decoration: none;
    color: inherit;
}

.gallery-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.gallery-category-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

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

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

.gallery-category-content {
    padding: var(--spacing-md);
}

.gallery-category-content h3 {
    font-family: var(--font-heading);
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-xs);
}

.gallery-category-content p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.gallery-item {
    aspect-ratio: 4/3;
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.gallery-item:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Placeholder pro obrázky */
.gallery-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-wood-dark), var(--color-wood-medium));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 1.2rem;
}

/* ========================================
   Videa
   ======================================== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-md);
}

.video-item {
    aspect-ratio: 16/9;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.video-item iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.video-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-wood-dark), var(--color-wood-medium));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    gap: var(--spacing-xs);
}

.video-placeholder span {
    font-size: 1.5rem;
}

.video-placeholder p {
    font-size: 0.9rem;
}

/* ========================================
   Projekty
   ======================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background-color: var(--color-bg-alt);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
}

.section:not(.section-alt) .project-card {
    background-color: var(--color-wood-dark);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.project-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

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

.project-content {
    padding: var(--spacing-md);
}

.project-content h3 {
    font-family: var(--font-heading);
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-xs);
}

.project-content p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* ========================================
   Technika
   ======================================== */
.techniques-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.technique-card {
    background-color: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid var(--color-wood-dark);
    display: block;
    color: inherit;
    text-decoration: none;
}

.technique-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border-color: var(--color-accent);
}

.technique-icon {
    font-size: 2.5rem;
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-sm);
}

.technique-card h3 {
    font-family: var(--font-heading);
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-xs);
}

.technique-card p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ========================================
   Historie
   ======================================== */
.history-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.history-text h3 {
    font-family: var(--font-heading);
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.history-text h3:first-child {
    margin-top: 0;
}

.history-text p {
    color: var(--color-text-muted);
    line-height: 1.8;
}

.history-gallery {
    display: grid;
    gap: var(--spacing-md);
}

/* ========================================
   Kontakt
   ======================================== */
.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-info {
    display: grid;
    gap: var(--spacing-md);
}

.contact-item h3 {
    font-family: var(--font-heading);
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-xs);
}

.contact-item p {
    color: var(--color-text-muted);
}

.contact-item a {
    color: var(--color-accent-light);
}

/* ========================================
   Patička
   ======================================== */
.footer {
    background-color: var(--color-wood-dark);
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: 1px solid var(--color-accent);
}

.footer p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ========================================
   Lightbox
   ======================================== */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 90vw;
    max-height: 90vh;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 2rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    transition: color var(--transition);
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    color: var(--color-accent-light);
}

.lightbox-close {
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 2.5rem;
}

.lightbox-prev {
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
}

.lightbox-next {
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
}

/* ========================================
   Animace při scrollu
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Responzivní design
   ======================================== */
@media (max-width: 992px) {
    .history-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        flex-direction: column;
        align-items: center;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: flex;
    }

    .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);
    }

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

    .video-item {
        min-height: 200px;
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: 1fr;
    }

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

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

/* ========================================
   Detail stránky techniky
   ======================================== */
.back-link {
    display: inline-block;
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
    transition: color var(--transition);
}

.back-link:hover {
    color: var(--color-text);
}

.technique-detail {
    max-width: 800px;
    margin: 0 auto;
}

.technique-detail h2 {
    font-family: var(--font-heading);
    color: var(--color-accent-light);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.technique-detail h2:first-child {
    margin-top: 0;
}

.technique-detail p {
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}