/* Сброс стилей и базовые настройки */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Цветовая палитра */
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-alt: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Типографика */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Отступы */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Переходы */
    --transition: all 0.3s ease;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Навигация */
.navbar {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease;
}

.navbar.hidden {
    transform: translateY(-100%);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.nav-brand .subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.login-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.625rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.login-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Герой-секция */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--spacing-2xl) 0;
    margin-bottom: var(--spacing-2xl);
    position: relative;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
}

.feature-icon {
    font-size: 1.5rem;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Секции */
.section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.section:not(:first-of-type) {
    border-top: 1px solid var(--border-color);
    margin-top: 0;
}

.section-alt {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-lg);
    position: relative;
}

.section-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    opacity: 0.4;
    border-radius: 2px;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

/* Блоки контента */
.content-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(229, 231, 235, 0.6);
    position: relative;
}

.content-block:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.content-block:not(:last-child)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    opacity: 0.3;
}

.content-block.reverse {
    direction: rtl;
}

.content-block.reverse > * {
    direction: ltr;
}

.content-text h3 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.content-text h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.content-text p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.7;
}

.content-text .lead {
    font-size: 1.125rem;
    color: var(--text-primary);
    font-weight: 500;
}

.content-image {
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    border-radius: 0.75rem;
    position: relative;
    min-height: 0;
}

/* Sticky изображение для десктопов */
@media (min-width: 969px) {
    .content-image {
        position: sticky;
        top: 100px;
        align-self: flex-start;
        max-height: calc(100vh - 120px);
        overflow-y: auto;
    }
    
    .content-image .content-img {
        max-height: calc(100vh - 120px);
        width: 100%;
        object-fit: contain;
    }
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 16 / 10;
    background: linear-gradient(135deg, var(--bg-alt) 0%, var(--border-color) 100%);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 1rem;
    border: 2px dashed var(--border-color);
    box-shadow: var(--shadow-md);
}

/* Стили для реальных изображений */
.hero-img,
.content-img {
    width: 100%;
    height: auto;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    object-fit: cover;
    transition: var(--transition);
}

.hero-img {
    aspect-ratio: 16 / 10;
}

.content-img {
    object-fit: contain;
    aspect-ratio: unset;
    width: 100%;
    height: auto;
    cursor: pointer;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.content-img:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.hero-img:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* Fallback для отсутствующих изображений */
img[src=""],
img:not([src]) {
    display: none;
}

/* Списки и шаги */
.steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.step {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.step-number {
    flex-shrink: 0;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.125rem;
}

.step p {
    margin: 0;
    padding-top: 0.5rem;
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
    line-height: 1.7;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

.numbered-list {
    list-style: none;
    counter-reset: item;
    padding: 0;
}

.numbered-list li {
    counter-increment: item;
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-xl);
    position: relative;
    color: var(--text-secondary);
    line-height: 1.7;
}

.numbered-list li::before {
    content: counter(item);
    position: absolute;
    left: 0;
    width: 1.75rem;
    height: 1.75rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

/* Сетки и карточки */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.setting-item {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.objects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.object-card {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.object-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.object-card strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 1rem;
}

.object-card p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.info-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.info-card {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border-left: 4px solid var(--primary-color);
}

.info-card h4 {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: 1.125rem;
}

.info-card p {
    margin: 0;
}

.status-list {
    display: flex;
    gap: var(--spacing-sm);
    margin: var(--spacing-sm) 0;
    flex-wrap: wrap;
}

.status-badge {
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.status-blue {
    background: #dbeafe;
    color: #1e40af;
}

.status-green {
    background: #d1fae5;
    color: #065f46;
}

.status-red {
    background: #fee2e2;
    color: #991b1b;
}

.note {
    padding: var(--spacing-md);
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    border-radius: 0.5rem;
    margin: var(--spacing-md) 0;
    color: #92400e;
}

.warning-box {
    padding: var(--spacing-md);
    background: #fef2f2;
    border-left: 4px solid #ef4444;
    border-radius: 0.5rem;
    margin: var(--spacing-md) 0;
}

.warning-box strong {
    display: block;
    color: #991b1b;
    margin-bottom: var(--spacing-sm);
}

.warning-box ul {
    margin: 0;
    padding-left: var(--spacing-lg);
    color: #7f1d1d;
}

.bot-commands {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.command-card {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.command-card h4 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1.125rem;
}

.command-card p {
    margin: 0;
}

.command-card code {
    background: var(--bg-alt);
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--primary-color);
}

/* Футер */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-lg) 0;
    text-align: center;
    margin-top: var(--spacing-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

/* Адаптивность */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .content-block {
        grid-template-columns: 1fr;
    }
    
    .content-block.reverse {
        direction: ltr;
    }
    
    .settings-grid,
    .objects-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .nav-brand h1 {
        font-size: 1.5rem;
    }
    
    .content-text h3 {
        font-size: 1.5rem;
    }
    
    .scroll-to-top {
        width: 2.5rem;
        height: 2.5rem;
        bottom: 1.5rem;
        right: 1.5rem;
        font-size: 1.25rem;
    }
    
    body {
        padding-top: 70px;
    }
}

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

/* Улучшение читаемости */
.content-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Сетка для клавиатурных сокращений */
.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.shortcut-item {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.shortcut-item strong {
    display: block;
    color: var(--primary-color);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    font-family: 'Courier New', monospace;
    background: var(--bg-alt);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 0.25rem;
    text-align: center;
}

.shortcut-item p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Версия в футере */
.footer-version {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Кнопка прокрутки вверх */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.scroll-to-top:active {
    transform: translateY(-1px);
}

/* Отступ для body, чтобы компенсировать фиксированную шапку */
body {
    padding-top: 80px;
}

/* Модальное окно для просмотра изображений */
.image-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-modal.active {
    display: flex;
}

.image-modal.visible {
    opacity: 1;
}

.image-modal-content {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: 0.5rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.image-modal-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease, transform 0.3s ease;
    z-index: 1001;
}

.image-modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

@media (max-width: 640px) {
    .image-modal-close {
        top: 1rem;
        right: 1rem;
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1.25rem;
    }
}