@import url('https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,400;14..32,500;14..32,600;14..32,700&display=swap');

/* ============================================
   0. Сброс и общие стили
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: #f0f4f8;
    color: #1e293b;
    line-height: 1.7;
    padding: 20px;
    min-height: 100vh;
}

/* ============================================
   1. Обёртка (основная каркасная структура)
   ============================================ */
.wrapper {
    max-width: 1300px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    border-radius: 32px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    padding: 30px 35px;
    display: flex;
    flex-direction: column;
    min-height: 90vh;
}

/* ============================================
   2. Шапка
   ============================================ */
.header {
    text-align: center;
    padding: 20px 0 25px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.5);
    margin-bottom: 30px;
}

.header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, #0f172a, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.header .sub {
    color: #64748b;
    font-size: 1.1rem;
}

/* ============================================
   3. Основная сетка (контент + сайдбар)
   ============================================ */
.main-grid {
    display: flex;
    gap: 35px;
    flex: 1;
}

.content {
    flex: 1;
    background: #ffffff;
    border-radius: 24px;
    padding: 35px 40px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.7);
}

.content h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 20px;
    border-bottom: 4px solid #eef2f6;
    padding-bottom: 15px;
}

.content h2 {
    font-size: 1.7rem;
    margin: 25px 0 12px;
    color: #1e293b;
}

.content p {
    margin-bottom: 18px;
    font-size: 1.05rem;
    color: #334155;
}

.content ul,
.content ol {
    margin: 12px 0 18px 25px;
}

.content code {
    background: #f1f5f9;
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.9rem;
}

.content hr {
    border: none;
    height: 2px;
    background: linear-gradient(to right, #e2e8f0, transparent);
    margin: 30px 0;
}

/* ============================================
   4. Боковое меню (сайдбар)
   ============================================ */
.sidebar {
    width: 260px;
    flex-shrink: 0;
    background: #ffffff;
    border-radius: 24px;
    padding: 20px 0;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.7);
    position: sticky;
    top: 20px;
    align-self: flex-start;
}

.sidebar .menu-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: #94a3b8;
    padding: 0 24px 14px 24px;
    border-bottom: 2px solid #f1f5f9;
    font-weight: 600;
}

.sidebar ul {
    list-style: none;
    padding: 12px 0;
}

.sidebar ul li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 24px;
    color: #475569;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.98rem;
    transition: all 0.2s;
    border-right: 4px solid transparent;
    border-radius: 0 12px 12px 0;
    margin-right: 12px;
}

.sidebar ul li a .icon {
    font-size: 1.2rem;
    width: 28px;
    text-align: center;
}

.sidebar ul li a:hover {
    background: #f8fafc;
    color: #0f172a;
    border-right-color: #3b82f6;
    transform: translateX(-4px);
}

.sidebar ul li a.active {
    background: #eff6ff;
    color: #1d4ed8;
    border-right-color: #2563eb;
    font-weight: 600;
}

.sidebar .admin-link {
    display: block;
    margin: 20px 20px 0;
    padding: 10px 0;
    border-top: 1px solid #f1f5f9;
    text-align: center;
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.85rem;
    transition: 0.2s;
}

.sidebar .admin-link:hover {
    color: #3b82f6;
}

/* ============================================
   5. Подвал
   ============================================ */
.footer {
    margin-top: 40px;
    padding-top: 20px;
    text-align: center;
    color: #94a3b8;
    font-size: 0.9rem;
    border-top: 2px solid rgba(255, 255, 255, 0.5);
}

.footer span {
    color: #3b82f6;
}

/* ============================================
   6. Общие классы для страниц (переиспользуются)
   ============================================ */

/* — заголовки страниц (используется в .welcome и .chapter-content) */
.page-title {
    font-size: 28px;
    font-weight: 700;
    color: #1a3a2f;
    text-align: center;
    border-bottom: 2px solid #e8e2d8;
    padding-bottom: 14px;
    margin-bottom: 24px;
}

/* — вступительный абзац (lead) */
.lead {
    font-size: 20px;
    color: #3a3a3a;
    line-height: 1.8;
    font-style: italic;
    border-left: 4px solid #c9a87c;
    padding-left: 20px;
    margin-bottom: 24px;
}

/* — основной текст */
.page-text {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 16px;
    color: #2d2d2d;
}

.page-text strong {
    color: #1a3a2f;
}

/* — подпись в конце блока */
.signature {
    font-size: 19px;
    color: #1a3a2f;
    border-top: 2px solid #e8e2d8;
    padding-top: 20px;
    margin-top: 24px;
    text-align: center;
}

/* — кнопки (общая база) */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.3s ease, transform 0.2s ease;
    text-align: center;
}

/* — большая кнопка "Читать далее" */
.btn-read-more {
    background: #1a3a2f;
    color: #ffffff;
    padding: 14px 40px;
    font-size: 18px;
    font-weight: 600;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-read-more:hover {
    background: #2a5a4f;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
    color: #fff;
}

/* — контейнер для кнопок */
.button-container {
    text-align: center;
    margin-top: 30px;
}

/* ============================================
   7. Стили для главной страницы (welcome)
   ============================================ */
.welcome {
    max-width: 720px;
    margin: 0 auto;
    padding: 20px 0;
}

/* ============================================
   8. Стили для страниц книг (chapter-content)
   ============================================ */
.chapter-content {
    max-width: 720px;
    margin: 0 auto;
    padding: 10px 0;
}

/* — навигация по главам */
.chapter-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 18px;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 2px solid #e8e2d8;
}

.nav-link {
    background: #f1eee9;
    color: #1a3a2f;
    padding: 10px 20px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    flex: 1 1 auto;
    text-align: center;
}

.nav-link:hover {
    background: #ddd6cb;
    transform: translateY(-2px);
}

/* ============================================
   9. Стили для страницы "Мои книги"
   ============================================ */
.resource-block {
    margin: 30px 0 40px 0;
    padding: 20px 24px;
    background: #f9f7f4;
    border-radius: 12px;
    border-left: 6px solid #c9a87c;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.resource-block.future {
    border-left-color: #8a9a8a;
    background: #f4f6f2;
}

.resource-title {
    font-size: 22px;
    color: #1a3a2f;
    margin-bottom: 10px;
    font-weight: 700;
}

.resource-description {
    font-size: 17px;
    line-height: 1.8;
    color: #2d2d2d;
    margin-bottom: 6px;
}

/* — список всех глав (используется на странице "Все главы") */
.full-chapter-list {
    list-style: none;
    padding: 0;
    margin: 20px 0 30px 0;
}

.full-chapter-list li {
    padding: 12px 16px;
    border-bottom: 1px solid #e8e2d8;
    font-size: 18px;
    transition: background 0.2s;
}

.full-chapter-list li:hover {
    background: #f6f2ed;
    border-radius: 6px;
}

.full-chapter-list li a {
    color: #1a3a2f;
    text-decoration: none;
    font-weight: 500;
    display: block;
}

.full-chapter-list li a:hover {
    color: #8a3a2a;
    text-decoration: underline;
}

/* ============================================
   10. Адаптивность
   ============================================ */

/* Планшеты */
@media (max-width: 900px) {
    .main-grid {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        position: static;
        margin-bottom: 20px;
    }

    .sidebar ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        padding: 6px 0;
    }

    .sidebar ul li a {
        border-right: none;
        border-bottom: 3px solid transparent;
        border-radius: 20px;
        margin: 0 6px;
        padding: 8px 16px;
        font-size: 0.9rem;
    }

    .sidebar ul li a:hover {
        transform: none;
        border-bottom-color: #3b82f6;
    }

    .sidebar ul li a.active {
        border-bottom-color: #2563eb;
        background: #eff6ff;
    }

    .content {
        padding: 25px 20px;
    }

    .header h1 {
        font-size: 2rem;
    }

    .wrapper {
        padding: 15px;
    }
}

/* Телефоны */
@media (max-width: 480px) {
    .sidebar ul li a {
        font-size: 0.8rem;
        padding: 6px 12px;
    }

    .content h1 {
        font-size: 1.6rem;
    }

    .chapter-navigation {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
}