:root {
    --primary: #306998;
    --secondary: #FFD43B;
    --accent: #4B8BBE;
    --dark: #1a1a2e;
    --light: #f5f5f5;
    --success: #98c379;
    --warning: #e5c07b;
    --danger: #e06c75;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, var(--dark), #16213e);
    color: var(--light);
    min-height: 100vh;
    overflow: hidden;
}

/* Главный контейнер страницы с прокруткой */
.page-container {
    height: 100vh;
    overflow-y: auto;
    padding: 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 2px solid var(--accent);
    gap: 20px;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-shrink: 0;
}

.logo h1 {
    font-size: 2rem;
    color: var(--secondary);
    white-space: nowrap;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.logo-icon {
    font-size: 2.5rem;
    animation: bounce 2s infinite;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 30px;
    flex: 1;
    justify-content: flex-end;
}

.nav-buttons {
    display: flex;
    gap: 15px;
}

.slide-info {
    font-size: 1.3rem;
    color: var(--secondary);
    white-space: nowrap;
    font-weight: bold;
    background: rgba(255,255,255,0.1);
    padding: 8px 16px;
    border-radius: 20px;
}

.main-content {
    flex: 1;
    display: flex;
    gap: 30px;
    margin: 20px 0;
    position: relative;
    min-height: 500px;
}

/* Боковая панель со слайдером - УВЕЛИЧИВАЕМ И ДЕЛАЕМ ВИДИМОЙ */
.slide-sidebar {
    width: 100px; /* Увеличиваем ширину */
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    background: rgba(255,255,255,0.03);
    border-radius: 15px;
    border: 1px solid rgba(255,255,255,0.1);
    min-height: 400px;
}

.slider-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    height: 100%;
    position: relative;
}

.slider-track {
    flex: 1;
    width: 8px; /* Увеличиваем толщину */
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    position: relative;
    margin: 20px 0;
    cursor: pointer;
    transition: var(--transition);
}

.slider-track:hover {
    background: rgba(255, 255, 255, 0.3);
}

.slider-thumb {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px; /* Увеличиваем размер */
    height: 24px;
    background: var(--secondary);
    border-radius: 50%;
    cursor: grab;
    box-shadow: 0 0 15px rgba(255, 212, 59, 0.6);
    transition: all 0.3s ease;
    z-index: 10;
    border: 2px solid var(--dark);
}

.slider-thumb:hover {
    transform: translateX(-50%) scale(1.3);
    box-shadow: 0 0 20px rgba(255, 212, 59, 0.9);
}

.slider-thumb:active {
    cursor: grabbing;
    transform: translateX(-50%) scale(1.2);
}

.slider-labels {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    color: var(--secondary);
    font-weight: bold;
    font-size: 1.1rem;
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
}

.slider-labels span {
    padding: 5px 0;
}

.slide-container {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
    position: relative;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    min-height: 600px;
}

.slide {
    display: none;
    animation: slideIn 0.6s ease;
    height: auto;
}

.slide.active {
    display: block;
}

.slide-title {
    font-size: 2.8rem;
    margin-bottom: 30px;
    color: var(--secondary);
    text-align: center;
    position: relative;
    padding-bottom: 20px;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.slide-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 30%;
    width: 40%;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    border-radius: 2px;
}

.slide-content {
    font-size: 1.4rem;
    line-height: 1.7;
}

.slide-content p {
    margin-bottom: 20px;
    text-align: justify;
}

.slide-content ul, .slide-content ol {
    margin: 20px 0;
    padding-left: 35px;
}

.slide-content li {
    margin-bottom: 12px;
    position: relative;
}

.btn {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}

.btn:active {
    transform: translateY(-1px);
}

.btn:disabled {
    background: #666;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.image-container {
    display: flex;
    justify-content: center;
    margin: 25px 0;
    padding: 20px;
    background: rgba(255,255,255,0.05);
    border-radius: 15px;
    border: 1px solid rgba(255,255,255,0.1);
}

.image-container img {
    max-width: 100%;
    max-height: 300px;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    object-fit: contain;
}

.list-item {
    margin: 15px 0;
    padding-left: 30px;
    position: relative;
}

.list-item::before {
    content: '⚡';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-size: 1.1em;
}

.highlight {
    color: var(--secondary);
    font-weight: bold;
    background: rgba(255,212,59,0.1);
    padding: 2px 6px;
    border-radius: 4px;
}

.concept-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin: 25px 0;
}

.concept-card {
    background: linear-gradient(135deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
    padding: 25px;
    border-radius: 15px;
    border: 1px solid rgba(255,255,255,0.1);
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.concept-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    border-color: var(--accent);
}

.concept-card h3 {
    color: var(--secondary);
    margin-bottom: 15px;
    font-size: 1.4rem;
    text-align: center;
}

.concept-card p {
    text-align: center;
    font-size: 1.1rem;
    line-height: 1.5;
}

.pattern-category {
    background: linear-gradient(135deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
    padding: 25px;
    border-radius: 15px;
    margin: 20px 0;
    border-left: 5px solid var(--secondary);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.pattern-list {
    columns: 2;
    gap: 25px;
}

.pattern-list li {
    break-inside: avoid;
    margin-bottom: 10px;
    background: rgba(255,255,255,0.05);
    padding: 10px 15px;
    border-radius: 8px;
    transition: var(--transition);
}

.pattern-list li:hover {
    background: rgba(255,255,255,0.1);
    transform: translateX(5px);
}

.example-block {
    background: rgba(255,255,255,0.07);
    padding: 20px;
    border-radius: 12px;
    margin: 20px 0;
    border-left: 4px solid var(--success);
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.principle-card {
    background: linear-gradient(135deg, rgba(48,105,152,0.2), rgba(75,139,190,0.1));
    padding: 20px;
    border-radius: 12px;
    margin: 15px 0;
    border: 1px solid rgba(75,139,190,0.3);
}

.principle-card h4 {
    color: var(--secondary);
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.benefits-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
    margin: 20px 0;
}

.benefit-item {
    background: rgba(152,195,121,0.1);
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid var(--success);
}

.pattern-diagram {
    text-align: center;
    margin: 20px 0;
    padding: 20px;
    background: rgba(255,255,255,0.05);
    border-radius: 12px;
    border: 2px dashed var(--accent);
}

.pattern-diagram .emoji {
    font-size: 4rem;
    margin-bottom: 15px;
}

.scroll-hint {
    position: fixed;
    bottom: 30px;
    right: 30px;
    color: var(--secondary);
    font-size: 1rem;
    animation: pulse 2s infinite;
    background: rgba(0,0,0,0.7);
    padding: 10px 15px;
    border-radius: 25px;
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 1000;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
}

@keyframes slideIn {
    from { 
        opacity: 0;
        transform: translateY(30px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.05);
    }
}

/* Полоса прокрутки для всей страницы */
.page-container::-webkit-scrollbar {
    width: 12px;
}

.page-container::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
}

.page-container::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 6px;
    border: 2px solid rgba(255,255,255,0.1);
}

.page-container::-webkit-scrollbar-thumb:hover {
    background: var(--secondary);
}

/* Responsive adjustments */
@media (max-width: 1200px) {
    .slide-title {
        font-size: 2.4rem;
    }
    
    .slide-content {
        font-size: 1.3rem;
    }
}

@media (max-width: 1024px) {
    .header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .header-controls {
        justify-content: center;
        width: 100%;
    }
    
    .logo h1 {
        font-size: 1.6rem;
    }
    
    .slide-title {
        font-size: 2.2rem;
    }
    
    .slide-content {
        font-size: 1.2rem;
    }
    
    .pattern-list {
        columns: 1;
    }
    
    .concept-grid {
        grid-template-columns: 1fr;
    }
    
    .scroll-hint {
        display: none;
    }
    
    .slide-sidebar {
        width: 80px;
        padding: 30px 15px;
    }
}

@media (max-width: 768px) {
    .header-controls {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-buttons {
        order: 2;
    }
    
    .slide-info {
        order: 1;
    }
    
    .logo h1 {
        font-size: 1.4rem;
    }
    
    .container {
        padding: 15px;
    }
    
    .slide-container {
        padding: 25px;
    }
    
    .slide-title {
        font-size: 2rem;
        margin-bottom: 20px;
    }
    
    .slide-content {
        font-size: 1.1rem;
    }
    
    .btn {
        padding: 10px 18px;
        font-size: 1rem;
    }
    
    .benefits-list {
        grid-template-columns: 1fr;
    }
    
    .slide-sidebar {
        display: none; /* На мобильных скрываем слайдер */
    }
}