/* ===================================
   Быстрова Воля — Artist Portfolio
   Modern CSS with Variables & Grid
   =================================== */

/* CSS Variables */
:root {
    /* Colors - Warm natural palette inspired by the artwork */
    --color-cream: #F5F0E8;
    --color-cream-dark: #EBE4D8;
    --color-terracotta: #C4756B;
    --color-terracotta-dark: #A85F55;
    --color-ochre: #B8860B;
    --color-brown: #3D2914;
    --color-brown-light: #5C4A32;
    --color-white: #FDFCFA;
    --color-black: #1A1612;
    
    /* Typography */
    --font-primary: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
    --font-size-base: 1.125rem;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2rem;
    --font-size-2xl: 3rem;
    --font-size-3xl: 4rem;
    --line-height: 1.7;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Layout */
    --max-width: 1200px;
    --header-height: 70px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-brown);
    background-color: var(--color-cream);
    overflow-x: hidden;
}

/* Texture overlay for artistic feel */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: -1;
}

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

a {
    color: var(--color-terracotta);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-terracotta-dark);
}

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Typography */
h1, h2, h3 {
    font-weight: 600;
    line-height: 1.2;
}

.section-title {
    font-size: var(--font-size-xl);
    text-align: center;
    margin-bottom: var(--space-lg);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 2px;
    background: var(--color-terracotta);
    margin: var(--space-sm) auto 0;
}

/* ===================================
   Header & Navigation
   =================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(245, 240, 232, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: box-shadow var(--transition-normal);
}

.header.scrolled {
    box-shadow: 0 2px 20px rgba(61, 41, 20, 0.1);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
    height: 100%;
}

.nav__logo {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-brown);
    letter-spacing: 0.02em;
}

.nav__logo:hover {
    color: var(--color-terracotta);
}

.nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.nav__links a {
    color: var(--color-brown);
    font-size: var(--font-size-base);
    position: relative;
    padding: var(--space-xs) 0;
}

.nav__links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-terracotta);
    transition: width var(--transition-normal);
}

.nav__links a:hover::after {
    width: 100%;
}

/* Language Switcher */
.lang-switcher {
    position: relative;
}

.lang-toggle {
    background: transparent;
    border: 1px solid var(--color-brown);
    color: var(--color-brown);
    padding: var(--space-xs) var(--space-sm);
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: 4px;
    min-width: 45px;
}

.lang-toggle:hover {
    background: var(--color-brown);
    color: var(--color-cream);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    background: var(--color-white);
    border: 1px solid var(--color-cream-dark);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(61, 41, 20, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 100;
}

.lang-switcher:hover .lang-dropdown,
.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown button {
    display: block;
    width: 100%;
    padding: var(--space-xs) var(--space-sm);
    background: transparent;
    border: none;
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    color: var(--color-brown);
    cursor: pointer;
    text-align: left;
    transition: background var(--transition-fast);
}

.lang-dropdown button:hover {
    background: var(--color-cream);
}

.lang-dropdown button.active {
    color: var(--color-terracotta);
    font-weight: 600;
}

/* Mobile language switcher */
.lang-switcher-mobile {
    display: flex;
    gap: var(--space-xs);
    padding: var(--space-sm) 0;
    border-top: 1px solid var(--color-cream-dark);
    margin-top: var(--space-sm);
}

.lang-btn {
    flex: 1;
    padding: var(--space-xs) var(--space-sm);
    background: transparent;
    border: 1px solid var(--color-brown-light);
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    color: var(--color-brown);
    cursor: pointer;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.lang-btn:hover,
.lang-btn.active {
    background: var(--color-brown);
    border-color: var(--color-brown);
    color: var(--color-cream);
}

/* Mobile Menu */
.nav__burger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav__burger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-brown);
    transition: all var(--transition-fast);
}

.nav__burger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

.nav__burger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: var(--color-cream);
    padding: var(--space-md);
    flex-direction: column;
    gap: var(--space-sm);
    z-index: 999;
    box-shadow: 0 10px 30px rgba(61, 41, 20, 0.1);
}

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

.mobile-menu a {
    color: var(--color-brown);
    font-size: var(--font-size-lg);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-cream-dark);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--space-xl) var(--space-md);
    position: relative;
    background: 
        linear-gradient(135deg, rgba(245, 240, 232, 0.9) 0%, rgba(235, 228, 216, 0.95) 100%),
        radial-gradient(circle at 20% 80%, rgba(196, 117, 107, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(184, 134, 11, 0.08) 0%, transparent 50%);
}

.hero__content {
    animation: fadeInUp 1s ease forwards;
}

.hero__title {
    font-size: var(--font-size-3xl);
    font-weight: 400;
    margin-bottom: var(--space-sm);
    letter-spacing: 0.05em;
}

.hero__name {
    display: block;
    font-weight: 600;
    color: var(--color-terracotta);
    font-size: 1.2em;
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-brown-light);
    margin-bottom: var(--space-lg);
    font-style: italic;
    letter-spacing: 0.1em;
}

.hero__cta {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--color-terracotta);
    color: var(--color-terracotta);
    font-size: var(--font-size-base);
    letter-spacing: 0.05em;
    transition: all var(--transition-normal);
}

.hero__cta:hover {
    background: var(--color-terracotta);
    color: var(--color-white);
}

.hero__scroll {
    position: absolute;
    bottom: var(--space-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-brown-light);
    font-size: var(--font-size-sm);
    animation: fadeIn 1s ease 0.5s forwards;
    opacity: 0;
}

.hero__scroll-line {
    width: 1px;
    height: 40px;
    background: var(--color-brown-light);
    animation: scrollLine 2s ease infinite;
}

/* ===================================
   Biography Section
   =================================== */

.biography {
    padding: var(--space-xl) 0;
    background: var(--color-white);
}

.bio-content {
    max-width: 800px;
    margin: 0 auto;
}

.bio-text p {
    margin-bottom: var(--space-md);
}

.bio-text h3 {
    font-size: var(--font-size-lg);
    margin: var(--space-lg) 0 var(--space-md);
    color: var(--color-terracotta);
}

.bio-list {
    margin-bottom: var(--space-md);
}

.bio-list li {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-cream-dark);
}

.bio-year {
    font-weight: 600;
    color: var(--color-ochre);
    min-width: 120px;
}

.exhibitions {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.exhibition {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    padding: var(--space-sm);
    border-radius: 4px;
    transition: background var(--transition-fast);
}

.exhibition:hover {
    background: var(--color-cream);
}

.exhibition--featured {
    background: rgba(196, 117, 107, 0.1);
    border-left: 3px solid var(--color-terracotta);
}

.exhibition--featured:hover {
    background: rgba(196, 117, 107, 0.15);
}

.bio-collections {
    font-style: italic;
    color: var(--color-brown-light);
    padding: var(--space-md);
    background: var(--color-cream);
    border-radius: 4px;
    margin-top: var(--space-lg);
}

/* ===================================
   Gallery Section
   =================================== */

.gallery {
    padding: var(--space-xl) 0;
    background: var(--color-cream);
}

.gallery__filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.filter-btn {
    padding: var(--space-xs) var(--space-md);
    background: transparent;
    border: 1px solid var(--color-brown-light);
    color: var(--color-brown-light);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: 4px;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--color-brown);
    border-color: var(--color-brown);
    color: var(--color-cream);
}

.gallery__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.gallery__item {
    position: relative;
    overflow: hidden;
    background: var(--color-white);
    border-radius: 4px;
    box-shadow: 0 4px 20px rgba(61, 41, 20, 0.08);
    transition: all var(--transition-normal);
}

.gallery__item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(61, 41, 20, 0.15);
}

.gallery__item a {
    display: block;
    overflow: hidden;
}

.gallery__item img {
    width: 100%;
    aspect-ratio: 4/5;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery__item:hover img {
    transform: scale(1.05);
}

.gallery__item figcaption {
    padding: var(--space-sm);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-brown-light);
}

.gallery__item.hidden {
    display: none;
}

/* ===================================
   Contact Section
   =================================== */

.contact {
    padding: var(--space-xl) 0;
    background: var(--color-white);
}

.contact__content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact__content p {
    margin-bottom: var(--space-xs);
    font-size: var(--font-size-lg);
}

.contact__info {
    margin-top: var(--space-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.contact__link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-lg);
    color: var(--color-terracotta);
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-terracotta);
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.contact__link:hover {
    background: var(--color-terracotta);
    color: var(--color-white);
}

.contact__icon {
    width: 24px;
    height: 24px;
}

/* ===================================
   Footer
   =================================== */

.footer {
    padding: var(--space-md) 0;
    background: var(--color-brown);
    color: var(--color-cream);
    text-align: center;
    font-size: var(--font-size-sm);
}

/* ===================================
   Lightbox
   =================================== */

.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 22, 18, 0.95);
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    z-index: 2000;
    padding: var(--space-md);
}

.lightbox.active {
    display: flex;
}

.lightbox__img {
    max-width: 90%;
    max-height: 80vh;
    object-fit: contain;
    animation: fadeIn 0.3s ease;
}

.lightbox__caption {
    color: var(--color-cream);
    margin-top: var(--space-md);
    font-size: var(--font-size-lg);
    text-align: center;
}

.lightbox__close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: transparent;
    border: none;
    color: var(--color-cream);
    font-size: 2.5rem;
    cursor: pointer;
    transition: color var(--transition-fast);
    line-height: 1;
}

.lightbox__close:hover {
    color: var(--color-terracotta);
}

.lightbox__prev,
.lightbox__next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--color-cream);
    font-size: 2rem;
    padding: var(--space-md) var(--space-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lightbox__prev:hover,
.lightbox__next:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-terracotta);
}

.lightbox__prev {
    left: var(--space-sm);
}

.lightbox__next {
    right: var(--space-sm);
}

/* ===================================
   Animations
   =================================== */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes scrollLine {
    0%, 100% {
        transform: scaleY(1);
        transform-origin: top;
    }
    50% {
        transform: scaleY(0.5);
        transform-origin: bottom;
    }
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1024px) {
    :root {
        --font-size-3xl: 3rem;
        --font-size-2xl: 2.5rem;
    }
    
    .gallery__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-3xl: 2.5rem;
        --font-size-2xl: 2rem;
        --font-size-xl: 1.75rem;
        --space-xl: 4rem;
        --space-lg: 2.5rem;
    }
    
    .nav__links {
        display: none;
    }
    
    .nav__burger {
        display: flex;
    }
    
    .hero__title {
        font-size: var(--font-size-2xl);
    }
    
    .bio-list li {
        flex-direction: column;
        gap: 0;
    }
    
    .bio-year {
        min-width: auto;
    }
    
    .exhibition {
        flex-direction: column;
        gap: 0;
    }
    
    .lightbox__prev,
    .lightbox__next {
        padding: var(--space-sm);
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-3xl: 2rem;
        --font-size-2xl: 1.75rem;
        --font-size-xl: 1.5rem;
        --font-size-lg: 1.25rem;
        --space-md: 1.5rem;
    }
    
    .gallery__grid {
        grid-template-columns: 1fr;
    }
    
    .gallery__filters {
        gap: var(--space-xs);
    }
    
    .filter-btn {
        padding: var(--space-xs) var(--space-sm);
        font-size: var(--font-size-sm);
    }
    
    .contact__link {
        width: 100%;
        justify-content: center;
    }
}

/* Print styles */
@media print {
    .header,
    .hero__scroll,
    .gallery__filters,
    .lightbox,
    .nav__burger,
    .mobile-menu {
        display: none !important;
    }
    
    .hero {
        min-height: auto;
        padding: var(--space-md);
    }
    
    .gallery__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}