/* Стили для навигации */
.navigation {
    margin-top: 2em;
    text-align: center;
}

/* Стили для layout с боковой навигацией */
.page-layout {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    position: relative;
}

/* Стили для боковой навигации */
.side-navigation {
    position: fixed;
    left: -280px;
    top: 0;
    height: 100vh;
    width: 280px;
    background: var(--card-bg);
    transition: all 0.3s ease;
    z-index: 1000;
    overflow-y: auto;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
    padding-top: 2.25rem;
}

.side-navigation.active {
    left: 0;
}

.nav-content {
    padding: 1.5rem;
}

.nav-tree {
    font-size: 0.95rem;
    padding: 0.5rem;
}

/* Стили для элементов навигации */
.nav-item {
    margin-bottom: 0.5rem;
}

.nav-topic-header,
.nav-subject-header,
.nav-section-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    flex: 1;
    display: block;
    padding: 0.4rem 0.8rem;
    color: var(--text-color);
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.nav-link:hover {
    background: var(--hover-bg);
}

/* Стили для активного состояния */
.nav-link.active {
    background-color: rgba(0, 123, 255, 0.1);
    color: #007bff;
    font-weight: 500;
}

.nav-toggle-conspects.active,
.nav-toggle-topics.active,
.nav-toggle-subjects.active,
.nav-toggle-sections.active {
    color: #007bff;
}

.nav-toggle-conspects.active .nav-toggle-icon::before,
.nav-toggle-conspects.active .nav-toggle-icon::after,
.nav-toggle-topics.active .nav-toggle-icon::before,
.nav-toggle-topics.active .nav-toggle-icon::after,
.nav-toggle-subjects.active .nav-toggle-icon::before,
.nav-toggle-subjects.active .nav-toggle-icon::after,
.nav-toggle-sections.active .nav-toggle-icon::before,
.nav-toggle-sections.active .nav-toggle-icon::after {
    background-color: #007bff;
}

/* Отступы для подразделов */
.nav-subtopics {
    margin-left: 1rem;
    padding-left: 0.8rem;
    border-left: 2px solid var(--border-color);
    margin-top: 0.3rem;
}

/* Отступы для конспектов */
.nav-conspects {
    margin-left: 1rem;
    padding-left: 0.8rem;
    border-left: 2px solid var(--conspect-border);
    margin-top: 0.3rem;
}

/* Отступы для предметов */
.nav-subjects {
    margin-left: 1rem;
    padding-left: 0.8rem;
    border-left: 2px solid var(--primary-color);
    margin-top: 0.3rem;
}

/* Отступы для разделов */
.nav-sections {
    margin-left: 1rem;
    padding-left: 0.8rem;
    border-left: 2px solid var(--accent-color);
    margin-top: 0.3rem;
}

/* Стили для конспектов в навигации */
.nav-link.conspect {
    font-size: 0.9rem;
    padding: 0.3rem 0.8rem;
}

/* Стили для задач в навигации */
.nav-link.item {
    font-size: 0.9rem;
    padding: 0.3rem 0.8rem;
}

/* Индикатор текущего положения */
.nav-current {
    font-weight: bold;
    position: relative;
}

.nav-current::before {
    content: '•';
    position: absolute;
    left: -1rem;
    color: var(--border-color);
}

/* Стили для кнопки переключения */
.nav-toggle {
    padding: 0.25rem;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 4px;
    transition: background-color 0.2s ease;
    z-index: 1001;
}

.nav-toggle:hover {
    background-color: var(--hover-bg);
}

.nav-toggle-icon {
    width: 1rem;
    height: 1rem;
    position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
    content: "";
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: white;
    transition: transform 0.2s ease;
}

.nav-toggle-icon::before {
    top: 0.25rem;
}

.nav-toggle-icon::after {
    bottom: 0.25rem;
}

.nav-toggle.active .nav-toggle-icon::before {
    transform: translateY(3px) rotate(45deg);
}

.nav-toggle.active .nav-toggle-icon::after {
    transform: translateY(-3px) rotate(-45deg);
}

/* Стили для кнопки раскрытия конспектов */
.nav-toggle-conspects,
.nav-toggle-topics,
.nav-toggle-subjects,
.nav-toggle-sections {
    padding: 0.25rem;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 4px;
    transition: all 0.2s ease;
    position: relative;
}

.nav-toggle-conspects:hover,
.nav-toggle-topics:hover,
.nav-toggle-subjects:hover,
.nav-toggle-sections:hover {
    background: var(--hover-bg);
}

.nav-toggle-conspects .nav-toggle-icon,
.nav-toggle-topics .nav-toggle-icon,
.nav-toggle-subjects .nav-toggle-icon,
.nav-toggle-sections .nav-toggle-icon {
    width: 0.8rem;
    height: 0.8rem;
    position: relative;
}

.nav-toggle-conspects .nav-toggle-icon::before,
.nav-toggle-conspects .nav-toggle-icon::after,
.nav-toggle-topics .nav-toggle-icon::before,
.nav-toggle-topics .nav-toggle-icon::after,
.nav-toggle-subjects .nav-toggle-icon::before,
.nav-toggle-subjects .nav-toggle-icon::after,
.nav-toggle-sections .nav-toggle-icon::before,
.nav-toggle-sections .nav-toggle-icon::after {
    content: "";
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: var(--text-color);
    transition: transform 0.2s ease;
}

.nav-toggle-conspects .nav-toggle-icon::before,
.nav-toggle-topics .nav-toggle-icon::before,
.nav-toggle-subjects .nav-toggle-icon::before,
.nav-toggle-sections .nav-toggle-icon::before {
    top: 0.25rem;
}

.nav-toggle-conspects .nav-toggle-icon::after,
.nav-toggle-topics .nav-toggle-icon::after,
.nav-toggle-subjects .nav-toggle-icon::after,
.nav-toggle-sections .nav-toggle-icon::after {
    bottom: 0.25rem;
}

.nav-toggle-conspects.active .nav-toggle-icon::before,
.nav-toggle-topics.active .nav-toggle-icon::before,
.nav-toggle-subjects.active .nav-toggle-icon::before,
.nav-toggle-sections.active .nav-toggle-icon::before {
    transform: translateY(3px) rotate(45deg);
}

.nav-toggle-conspects.active .nav-toggle-icon::after,
.nav-toggle-topics.active .nav-toggle-icon::after,
.nav-toggle-subjects.active .nav-toggle-icon::after,
.nav-toggle-sections.active .nav-toggle-icon::after {
    transform: translateY(-3px) rotate(-45deg);
}

/* Стили для мобильного меню */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--card-bg);
    transition: right 0.3s ease;
    z-index: 1001;
    overflow-y: auto;
    padding-top: 4rem;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav {
    padding: 2rem;
}

.mobile-nav-link {
    display: block;
    padding: 1rem;
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease;
}

.mobile-nav-link:hover {
    background: var(--hover-bg);
}

.mobile-user-name {
    display: block;
    padding: 1rem;
    color: var(--text-muted);
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
}

/* Стили для скроллбара в боковой навигации */
.side-navigation::-webkit-scrollbar {
    width: 6px;
}

.side-navigation::-webkit-scrollbar-track {
    background: var(--bg-color);
}

.side-navigation::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

/* Адаптивность */
@media (max-width: 768px) {
    .side-navigation {
        width: 100%;
        left: -100%;
    }
    
    .nav-content {
        padding: 1rem;
    }
    
    .nav-tree {
        font-size: 1rem;
        padding: 0.25rem;
    }
    
    .nav-link {
        padding: 0.5rem 1rem;
    }
    
    .nav-conspects,
    .nav-subtopics,
    .nav-subjects,
    .nav-sections {
        margin-left: 0.5rem;
        padding-left: 0.5rem;
    }
}