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

:root {
    --primary-color: #333;
    --secondary-color: #666;
    --background-color: #fff;
    --accent-color: #5bbad5;
    --border-color: #eee;
    --shadow-color: rgba(0,0,0,0.1);
    --transition-speed: 0.3s;
    --card-background: #f8f9fa;
    --hover-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

body.dark {
    --primary-color: #f0f0f0;
    --secondary-color: #ccc;
    --background-color: #1a1a1a;
    --accent-color: #4ca6c2;
    --border-color: #444;
    --shadow-color: rgba(255,255,255,0.1);
    --card-background: #2d2d2d;
    --hover-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--primary-color);
    background-color: var(--background-color);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Индикатор прокрутки */
.line {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--accent-color);
    width: 0%;
    z-index: 1000;
    transition: width 0.1s;
}

/* Основной контейнер */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    flex: 1;
}

/* Шапка */
.header {
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 30px;
}

.title-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.site-title {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.8rem;
    font-weight: 700;
    transition: color var(--transition-speed);
}

.site-title:hover {
    color: var(--accent-color);
}

/* Переключатель темы */
.theme-switcher {
    position: relative;
}

.theme-checkbox {
    opacity: 0;
    position: absolute;
}

.theme-label {
    background-color: var(--card-background);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 5px;
    position: relative;
    height: 26px;
    width: 50px;
    transform: scale(1);
    transition: all var(--transition-speed);
}

.theme-label:hover {
    border-color: var(--accent-color);
    transform: scale(1.05);
}

.theme-label .moon-icon,
.theme-label .sun-icon {
    width: 14px;
    height: 14px;
    fill: var(--primary-color);
    transition: fill var(--transition-speed);
}

.theme-ball {
    background-color: var(--primary-color);
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    height: 18px;
    width: 18px;
    transform: translateX(0);
    transition: transform var(--transition-speed), background-color var(--transition-speed);
}

.theme-checkbox:checked + .theme-label .theme-ball {
    transform: translateX(24px);
}

/* Основной контент */
.content {
    margin-bottom: 40px;
}

/* Секция с информацией об авторе */
.intro-section {
    margin-bottom: 40px;
}

.author-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    margin-bottom: 40px;
    padding: 25px;
    background-color: var(--card-background);
    border-radius: 15px;
    box-shadow: 0 4px 15px var(--shadow-color);
    border: 1px solid var(--border-color);
}

@media (min-width: 768px) {
    .author-container {
        flex-direction: row;
        align-items: flex-start;
    }
}

.author-image {
    flex-shrink: 0;
    text-align: center;
}

.author-image img {
    border-radius: 50%;
    width: 200px;
    height: 200px;
    object-fit: cover;
    border: 4px solid var(--accent-color);
    transition: all var(--transition-speed);
    box-shadow: 0 4px 15px var(--shadow-color);
}

.author-image img:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px var(--shadow-color);
}

.author-info {
    flex: 1;
}

.author-name {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary-color);
    text-align: center;
    position: relative;
    padding-bottom: 10px;
}

.author-name::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--accent-color);
}

@media (min-width: 768px) {
    .author-name {
        text-align: left;
    }
    
    .author-name::after {
        left: 0;
        transform: none;
    }
}

.author-description p {
    margin-bottom: 15px;
    text-align: justify;
    color: var(--secondary-color);
    font-size: 1.1rem;
}

/* Секция мастер-классов */
.master-class-section {
    text-align: center;
    padding: 30px;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    box-shadow: 0 4px 15px var(--shadow-color);
    margin-bottom: 30px;
    transition: all var(--transition-speed);
}

.master-class-section:hover {
    box-shadow: var(--hover-shadow);
    transform: translateY(-5px);
}

.master-class-section h3 {
    margin-bottom: 25px;
    color: var(--primary-color);
    font-size: 1.6rem;
    position: relative;
    display: inline-block;
    padding-bottom: 10px;
}

.master-class-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--accent-color);
}

.master-class-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    margin-top: 20px;
}

@media (min-width: 600px) {
    .master-class-links {
        flex-direction: row;
        justify-content: center;
    }
}

.master-class-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-speed);
    padding: 20px;
    border-radius: 10px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 300px;
}

.master-class-link:hover {
    transform: translateY(-8px);
    box-shadow: var(--hover-shadow);
    border-color: var(--accent-color);
}

.master-class-link img {
    width: 200px;
    height: 200px;
    border-radius: 8px;
    object-fit: cover;
    border: 2px solid var(--border-color);
    margin-bottom: 15px;
    transition: all var(--transition-speed);
}

.master-class-link:hover img {
    border-color: var(--accent-color);
    transform: scale(1.05);
}

.master-class-text {
    margin-top: 10px;
}

.master-class-text p {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-color);
    transition: color var(--transition-speed);
}

.master-class-link:hover .master-class-text p {
    color: var(--primary-color);
}

/* Секция донатов */
.donation-section {
    text-align: center;
    padding: 30px;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    box-shadow: 0 4px 15px var(--shadow-color);
    margin-bottom: 30px;
    transition: all var(--transition-speed);
}

.donation-section:hover {
    box-shadow: var(--hover-shadow);
    transform: translateY(-5px);
}

.donation-section h3 {
    margin-bottom: 25px;
    color: var(--primary-color);
    font-size: 1.6rem;
    position: relative;
    display: inline-block;
    padding-bottom: 10px;
}

.donation-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background-color: var(--accent-color);
}

.donation-links {
    display: flex;
    justify-content: center;
    align-items: center;
}

.donation-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-speed);
    padding: 20px;
    border-radius: 10px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    max-width: 300px;
}

.donation-link:hover {
    transform: translateY(-8px);
    box-shadow: var(--hover-shadow);
    border-color: var(--accent-color);
}

.donation-link img {
    width: 200px;
    height: 200px;
    border-radius: 8px;
    object-fit: contain;
    border: 2px solid var(--border-color);
    background-color: white;
    padding: 10px;
    margin-bottom: 15px;
    transition: all var(--transition-speed);
}

body.dark .donation-link img {
    background-color: #2d2d2d;
}

.donation-link:hover img {
    border-color: var(--accent-color);
    transform: scale(1.05);
}

.donation-text {
    margin-top: 10px;
}

.donation-text p {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-color);
    transition: color var(--transition-speed);
}

.donation-link:hover .donation-text p {
    color: var(--primary-color);
}

/* Навигация */
.main-navigation {
    margin: 40px 0;
}

.main-navigation ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 15px;
    padding: 25px;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    box-shadow: 0 4px 15px var(--shadow-color);
}

@media (min-width: 600px) {
    .main-navigation ul {
        flex-direction: row;
        justify-content: center;
    }
}

.main-navigation a {
    color: var(--primary-color);
    text-decoration: none;
    padding: 12px 25px;
    border: 2px solid transparent;
    border-radius: 8px;
    transition: all var(--transition-speed);
    display: block;
    text-align: center;
    font-weight: 600;
    background-color: var(--background-color);
}

.main-navigation a:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background-color: var(--background-color);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

/* Подвал */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    margin-top: auto;
    background-color: var(--card-background);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    border-radius: 50%;
    background-color: var(--background-color);
    border: 2px solid var(--border-color);
    transition: all var(--transition-speed);
    width: 50px;
    height: 50px;
}

.social-links a:hover {
    border-color: var(--accent-color);
    transform: translateY(-5px);
    background-color: var(--accent-color);
}

.social-links a:hover img {
    filter: brightness(0) invert(1);
}

.social-links img {
    display: block;
    transition: filter var(--transition-speed);
    width: 24px;
    height: 24px;
}

body.dark .social-links img:not(:hover) {
    filter: invert(0.8);
}

.copyright {
    margin-top: 20px;
    color: var(--secondary-color);
    font-size: 0.9rem;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

/* Анимации */
.back-transition {
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

/* Адаптивные изображения */
img {
    max-width: 100%;
    height: auto;
}

/* Адаптивность */
@media (max-width: 768px) {
    .main-container {
        padding: 0 15px;
    }
    
    .site-title {
        font-size: 1.5rem;
    }
    
    .author-name {
        font-size: 1.5rem;
    }
    
    .master-class-section,
    .donation-section {
        padding: 20px;
    }
    
    .master-class-section h3,
    .donation-section h3 {
        font-size: 1.4rem;
    }
    
    .master-class-link,
    .donation-link {
        padding: 15px;
    }
    
    .master-class-link img,
    .donation-link img {
        width: 180px;
        height: 180px;
    }
    
    .author-container {
        padding: 20px;
    }
    
    .author-image img {
        width: 180px;
        height: 180px;
    }
}

@media (max-width: 480px) {
    .site-title {
        font-size: 1.3rem;
    }
    
    .author-image img {
        width: 150px;
        height: 150px;
    }
    
    .social-links {
        gap: 15px;
    }
    
    .social-links a {
        padding: 10px;
        width: 45px;
        height: 45px;
    }
    
    .social-links img {
        width: 20px;
        height: 20px;
    }
    
    .master-class-link img,
    .donation-link img {
        width: 160px;
        height: 160px;
    }
    
    .master-class-text p,
    .donation-text p {
        font-size: 1.1rem;
    }
    
    .main-navigation a {
        padding: 10px 20px;
        font-size: 0.95rem;
    }
}

/* Эффекты при загрузке */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.author-container,
.master-class-section,
.donation-section,
.main-navigation ul {
    animation: fadeInUp 0.6s ease-out forwards;
}

.author-container {
    animation-delay: 0.1s;
}

.master-class-section {
    animation-delay: 0.2s;
}

.donation-section {
    animation-delay: 0.3s;
}

.main-navigation ul {
    animation-delay: 0.4s;
}

/* Улучшенные состояния фокуса для доступности */
.site-title:focus,
.master-class-link:focus,
.donation-link:focus,
.main-navigation a:focus,
.social-links a:focus,
.theme-label:focus-within {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Плавная прокрутка */
html {
    scroll-behavior: smooth;
}

/* Улучшение читаемости для темной темы */
body.dark .author-description p,
body.dark .copyright {
    color: var(--secondary-color);
}

body.dark .master-class-link,
body.dark .donation-link,
body.dark .main-navigation a {
    background-color: var(--card-background);
}