/* ========================================
   DESIGN TOKENS - РЕАКТИВНАЯ ЭРА
   ======================================== */

:root {
    /* Базовые цвета */
    --color-bg: #1a1a1a;
    --color-bg-secondary: #252525;
    --color-bg-card: #2a2a2a;
    --color-text: #d9d9d9;
    --color-text-secondary: #999999;
    --color-text-muted: #666666;
    --color-line: #3a3a3a;
    
    /* Акцентные цвета */
    --color-accent-red: #c94a4a;
    --color-accent-red-hover: #d85c5c;
    --color-accent-red-active: #b03d3d;
    
    --color-accent-gray: #5a5a5a;
    --color-accent-gray-hover: #6a6a6a;
    --color-accent-gray-active: #4a4a4a;
    
    --color-accent-cool: #67C9C3;
    --color-accent-cool-hover: #84D9D3;
    
    /* Типографика */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    
    --font-size-title: clamp(24px, 4vw, 36px);
    --font-size-chapter: clamp(24px, 3.5vw, 36px);
    --font-size-body: 16px;
    --font-size-small: 13px;
    --font-size-ui: 12px;
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    
    --line-height: 1.7;
    --line-height-tight: 1.3;
    
    /* Ширина контента */
    --content-width: 800px;
    --content-padding: 24px;
    
    /* Анимации */
    --transition-fast: 150ms ease-out;
    --transition-medium: 250ms ease-out;
    --transition-slow: 350ms ease-out;
}

/* ========================================
   RESET & BASE
   ======================================== */

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========================================
   ФОНОВОЕ ИЗОБРАЖЕНИЕ
   ======================================== */

.bg-image {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('assets/illustration-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    opacity: 0.08;
    z-index: -1;
    pointer-events: none;
}

/* ========================================
   ШАПКА (HEADER)
   ======================================== */

.header {
    padding: 16px var(--content-padding);
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid var(--color-line);
}

/* ИЗМЕНЕНО: как в index.html — max-width + width: 100% */
.header__inner {
    max-width: var(--content-width);
    width: 100%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 32px;
    flex-wrap: wrap;
}

.header__inner--with-back {
    justify-content: space-between;
}

.header__left {
    display: flex;
    align-items: center;
}

.header__right {
    display: flex;
    align-items: center;
    gap: 32px;
    flex-wrap: wrap;
}

.header__link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-small);
    transition: color var(--transition-fast);
}

.header__link:hover,
.header__link:focus {
    color: var(--color-text);
}

.header__link--boosty:hover {
    color: #ff6b6b;
}

.header__link--telegram:hover {
    color: var(--color-accent-cool);
}

.header__icon-img {
    width: 24px;
    height: 24px;
    object-fit: contain;
    display: block;
}

.header__text {
    display: flex;
    flex-direction: column;
    line-height: 1.4;
}

.header__text-primary {
    font-weight: var(--font-weight-medium);
}

.header__text-secondary {
    font-size: 11px;
    color: var(--color-text-muted);
}

/* ========================================
   ОСНОВНОЙ КОНТЕНТ — Входная страница
   ======================================== */

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 70px var(--content-padding);
}

.intro {
    max-width: var(--content-width);
    margin: 0 auto;
    width: 100%;
}

.intro__title {
    font-size: var(--font-size-title);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
    line-height: var(--line-height-tight);
}

/* Hero изображение */
.intro__hero {
    width: 100%;
    margin-bottom: 32px;
    overflow: hidden;
}

.intro__hero-image {
    width: 100%;
    height: auto;
    display: block;
}

.intro__description {
    font-size: var(--font-size-body);
    color: var(--color-text);
    margin-bottom: 32px;
    line-height: var(--line-height);
}

.intro__description strong {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
}

/* Счётчик глав и действия */
.intro__actions-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

@media (max-width: 600px) {
    .intro__actions-grid {
        grid-template-columns: 1fr;
    }
}

.intro__action-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.intro__chapters-count {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.chapters-available {
    color: var(--color-accent-red);
    font-weight: var(--font-weight-semibold);
}

/* Обновления */
.intro__updates {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    align-items: start;
    padding: 16px;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-line);
    margin-bottom: 32px;
}

@media (max-width: 600px) {
    .intro__updates {
        grid-template-columns: 1fr;
    }
}

.intro__update-info {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.intro__update-label {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
}

.intro__update-date {
    color: var(--color-text);
}

/* ========================================
   КНОПКИ
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 24px;
    font-family: var(--font-main);
    font-size: var(--font-size-ui);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: 
        background-color var(--transition-fast),
        color var(--transition-fast),
        border-color var(--transition-fast),
        transform var(--transition-fast),
        box-shadow var(--transition-fast);
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.btn--large {
    font-size: 14px;
    padding: 16px 28px;
}

.btn--primary {
    background-color: var(--color-accent-red);
    color: #fff;
    border-color: var(--color-accent-red);
}

.btn--primary:hover,
.btn--primary:focus {
    background-color: var(--color-accent-red-hover);
    border-color: var(--color-accent-red-hover);
}

.btn--primary:active {
    background-color: var(--color-accent-red-active);
    border-color: var(--color-accent-red-active);
}

.btn--secondary {
    background-color: var(--color-accent-gray);
    color: #fff;
    border-color: var(--color-accent-gray);
}

.btn--secondary:hover,
.btn--secondary:focus {
    background-color: var(--color-accent-gray-hover);
    border-color: var(--color-accent-gray-hover);
}

.btn--secondary:active {
    background-color: var(--color-accent-gray-active);
    border-color: var(--color-accent-gray-active);
}

.btn--link {
    background-color: transparent;
    color: var(--color-text);
    border-color: var(--color-line);
}

.btn--link:hover,
.btn--link:focus {
    border-color: var(--color-text-secondary);
    color: var(--color-text);
}

.btn--disabled {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-muted);
    border-color: var(--color-line);
    cursor: not-allowed;
    pointer-events: none;
}

/* ========================================
   ПОДВАЛ
   ======================================== */

.footer {
    padding: 24px var(--content-padding);
    text-align: center;
    border-top: 1px solid var(--color-line);
    margin-top: auto;
}

.footer__copyright {
    font-size: var(--font-size-small);
    color: var(--color-text-muted);
}

.footer__copyright a {
    color: var(--color-text-secondary);
    text-decoration: none;
}

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

/* ========================================
   СТРАНИЦА ГЛАВЫ
   ======================================== */

.page-chapter {
    padding-top: 0;
}

/* ИЗМЕНЕНО: обёртка с padding — как .main-content в index.html */
.chapter-wrapper {
    padding: 32px var(--content-padding);
}

/* ИЗМЕНЕНО: контейнер с max-width — как .intro в index.html */
.chapter-content {
    max-width: var(--content-width);
    margin: 0 auto;
    width: 100%;
}

.chapter-image {
    width: 100%;
    height: auto;
    margin-bottom: 32px;
    display: block;
}

.chapter-title {
    font-size: var(--font-size-chapter);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-bottom: 32px;
    line-height: var(--line-height-tight);
}

.chapter-number {
    color: var(--color-accent-red);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: var(--font-size-body);
}

.chapter-title__name {
    font-weight: var(--font-weight-normal);
}

.chapter-text {
    margin-bottom: 48px;
    font-size: var(--font-size-body);
    line-height: var(--line-height);
	color: #b8b8b8;
}

.chapter-text p {
    margin-bottom: 1.2em;
    text-align: justify;
    hyphens: auto;
}

.chapter-text p:last-child {
    margin-bottom: 0;
}

/* Нижняя навигация по главам */
.chapter-footer {
    border-top: 1px solid var(--color-line);
    padding: 32px var(--content-padding);
}

/* ИЗМЕНЕНО: контейнер с max-width — как .intro в index.html */
.chapter-footer__inner {
    max-width: var(--content-width);
    margin: 0 auto;
    width: 100%;
}

.chapter-footer__nav {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 12px;
    margin-bottom: 32px;
}

.chapter-footer__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    font-size: var(--font-size-ui);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    text-decoration: none;
    transition: 
        background-color var(--transition-fast),
        color var(--transition-fast);
}

.chapter-footer__link--prev {
    background-color: var(--color-accent-gray);
    color: #fff;
    border: 1px solid var(--color-accent-gray);
}

.chapter-footer__link--prev:hover {
    background-color: var(--color-accent-gray-hover);
    border-color: var(--color-accent-gray-hover);
}

.chapter-footer__link--next {
    background-color: var(--color-accent-red);
    color: #fff;
    border: 1px solid var(--color-accent-red);
}

.chapter-footer__link--next:hover {
    background-color: var(--color-accent-red-hover);
    border-color: var(--color-accent-red-hover);
}

.chapter-footer__link--disabled {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-muted);
    border: 1px solid var(--color-line);
    cursor: not-allowed;
    pointer-events: none;
}

/* Ссылка на отзыв */
.chapter-feedback {
    padding-top: 16px;
    border-top: 1px solid var(--color-line);
    text-align: center;
}

.feedback-link {
    display: inline-block;
    padding: 12px 24px;
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border: 1px dashed var(--color-line);
    transition: 
        color var(--transition-fast),
        border-color var(--transition-fast);
}

.feedback-link:hover,
.feedback-link:focus {
    color: var(--color-accent-red);
    border-color: var(--color-accent-red);
}

/* ========================================
   СТРАНИЦА КОНЦЕПТ-АРТА
   ======================================== */

/* ИЗМЕНЕНО: обёртка с padding — как .main-content в index.html */
.gallery-wrapper {
    padding: 32px var(--content-padding);
}

/* ИЗМЕНЕНО: контейнер с max-width — как .intro в index.html */
.gallery-content {
    max-width: var(--content-width);
    margin: 0 auto;
    width: 100%;
}

.gallery-title {
    font-size: var(--font-size-chapter);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-bottom: 32px;
    line-height: var(--line-height-tight);
}

.gallery-title__chapter {
    color: var(--color-accent-red);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-normal);
}

.concept-card {
    margin-bottom: 48px;
}

.concept-card__image {
    width: 100%;
    height: auto;
    display: block;
}

.concept-card__quote {
    padding: 24px 0;
    font-size: var(--font-size-body);
    color: var(--color-text-secondary);
    font-style: italic;
    line-height: var(--line-height);
}

.concept-card__quote::before {
    content: '"';
}

.concept-card__quote::after {
    content: '"';
}

/* Кнопки на странице галереи */
.gallery-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 32px;
}

@media (max-width: 600px) {
    .gallery-actions {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   АУДИОПЛЕЕР
   ======================================== */

.audio-section {
    margin-bottom: 32px;
    padding: 16px;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-line);
}

.audio-label {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.audio-player {
    width: 100%;
    height: 40px;
    border-radius: 0;
    background-color: transparent;
}

.audio-player::-webkit-media-controls-panel {
    background-color: var(--color-bg-card);
}

/* ========================================
   АНИМАЦИИ ПОЯВЛЕНИЯ
   ======================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp var(--transition-medium) ease-out backwards;
}

.animate-fade-in-delay-1 { animation-delay: 80ms; }
.animate-fade-in-delay-2 { animation-delay: 160ms; }
.animate-fade-in-delay-3 { animation-delay: 240ms; }
.animate-fade-in-delay-4 { animation-delay: 320ms; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========================================
   АДАПТИВНОСТЬ
   ======================================== */

@media (max-width: 768px) {
    :root {
        --content-padding: 16px;
        --font-size-body: 15px;
    }
    
    .header {
        padding: 12px var(--content-padding);
    }
    
    .header__text-secondary {
        display: none;
    }
    
    .main-content {
        padding: 24px var(--content-padding);
    }
    
    .intro__title {
        font-size: clamp(20px, 6vw, 32px);
    }
    
    .btn {
        padding: 12px 16px;
        font-size: 11px;
        width: 100%;
    }
    
    .btn--large {
        font-size: 13px;
        padding: 14px 20px;
    }
    
    .chapter-footer__nav {
        grid-template-columns: 1fr;
    }
    
    .chapter-footer__link {
        width: 100%;
        justify-content: center;
    }
    
    .header__inner--with-back {
        flex-direction: column;
        align-items: stretch;
    }
    
    .header__left {
        justify-content: center;
    }
    
    .header__right {
        justify-content: center;
    }
    
    .gallery-actions {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .header__text-primary {
        font-size: 11px;
    }
    
    .intro__actions-grid {
        gap: 12px;
    }
    
    .intro__updates {
        padding: 12px;
    }
}

/* ========================================
   УТИЛИТЫ
   ======================================== */

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

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }