/* Основные переменные */
:root {
    --primary-bg: #0d1117;
    --secondary-bg: #161b22;
    --accent-bg: #21262d;
    --primary-color: #00ff88;
    --secondary-color: #00d4ff;
    --text-primary: #f0f6fc;
    --text-secondary: #7d8590;
    --border-color: #30363d;
    --danger-color: #ff4757;
    --warning-color: #ffa502;
    --success-color: #2ed573;
    --glow-primary: 0 0 10px var(--primary-color);
    --glow-secondary: 0 0 10px var(--secondary-color);
}

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

body {
    font-family: 'Orbitron', monospace;
    background: var(--primary-bg);
    color: var(--text-primary);
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 25% 25%, var(--primary-color)15 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, var(--secondary-color)15 0%, transparent 50%);
    background-attachment: fixed;
}

/* Заголовок */
.header {
    background: var(--secondary-bg);
    border-bottom: 2px solid var(--primary-color);
    padding: 1rem 0;
    box-shadow: 0 4px 20px rgba(0, 255, 136, 0.3);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'Press Start 2P', monospace;
    font-size: 1.5rem;
    color: var(--primary-color);
    text-shadow: var(--glow-primary);
    animation: pulse 2s infinite;
}

.logo-bracket {
    color: var(--secondary-color);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.navigation {
    display: flex;
    gap: 0.5rem;
}

.nav-btn {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.nav-btn:hover,
.nav-btn.active {
    color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 136, 0.2), transparent);
    transition: left 0.5s;
}

.nav-btn:hover::before {
    left: 100%;
}

/* Основной контейнер */
.main-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* Секции */
.section {
    display: none;
    animation: fadeIn 0.5s ease-in;
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Панели */
.welcome-panel,
.news-panel,
.chat-container,
.files-container,
.profile-container {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    position: relative;
}

.welcome-panel::before,
.news-panel::before,
.chat-container::before,
.files-container::before,
.profile-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.welcome-panel h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 2rem;
    text-align: center;
}

/* Статистика */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.stat-card {
    background: var(--accent-bg);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 255, 136, 0.2);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--secondary-color);
    font-family: 'Press Start 2P', monospace;
}

.stat-label {
    color: var(--text-secondary);
    margin-top: 0.5rem;
    text-transform: uppercase;
    font-size: 0.9rem;
}

/* Новости */
.news-panel h3 {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.news-item {
    padding: 1rem;
    margin: 0.5rem 0;
    background: var(--accent-bg);
    border-left: 3px solid var(--primary-color);
    border-radius: 4px;
    transition: background 0.3s ease;
}

.news-item:hover {
    background: var(--border-color);
}

.news-date {
    color: var(--primary-color);
    font-family: 'Press Start 2P', monospace;
    font-size: 0.8rem;
    margin-right: 1rem;
}

.news-text {
    color: var(--text-primary);
}

/* Чат */
.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.chat-header h3 {
    color: var(--secondary-color);
    font-size: 1.5rem;
}

.online-counter {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    animation: blink 2s infinite;
}

.status-indicator.online {
    background: var(--success-color);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0.3; }
}

.chat-messages {
    height: 400px;
    overflow-y: auto;
    padding: 1rem;
    background: var(--accent-bg);
    border-radius: 8px;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
}

.message {
    margin-bottom: 0.75rem;
    padding: 0.5rem;
    border-radius: 4px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateX(-20px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.message.system {
    background: rgba(0, 212, 255, 0.1);
    border-left: 3px solid var(--secondary-color);
}

.message.user {
    background: rgba(0, 255, 136, 0.1);
    border-left: 3px solid var(--primary-color);
}

.message-time {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-family: 'Press Start 2P', monospace;
}

.message-author {
    color: var(--primary-color);
    font-weight: 700;
    margin: 0 0.5rem;
}

.message-content {
    color: var(--text-primary);
}

.chat-input-container {
    display: flex;
    gap: 1rem;
}

#chatInput {
    flex: 1;
    background: var(--accent-bg);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 4px;
    font-family: 'Orbitron', monospace;
    transition: border-color 0.3s ease;
}

#chatInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
}

.send-btn {
    background: var(--primary-color);
    color: var(--primary-bg);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
}

.send-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--glow-secondary);
}

/* Файлы */
.files-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.files-header h3 {
    color: var(--secondary-color);
    font-size: 1.5rem;
}

.upload-btn {
    background: var(--success-color);
    color: var(--primary-bg);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(46, 213, 115, 0.4);
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 3rem;
    text-align: center;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--primary-color);
    background: rgba(0, 255, 136, 0.05);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.upload-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

#fileInput {
    display: none;
}

.files-list h4 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: var(--accent-bg);
    border-radius: 8px;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.file-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(0, 255, 136, 0.1);
}

.file-icon {
    font-size: 2rem;
    margin-right: 1rem;
}

.file-info {
    flex: 1;
}

.file-name {
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.file-details {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.file-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-family: 'Orbitron', monospace;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.8rem;
}

.action-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.action-btn.download:hover {
    background: var(--success-color);
    color: var(--primary-bg);
}

.action-btn.preview:hover {
    background: var(--secondary-color);
    color: var(--primary-bg);
}

/* Профиль */
.profile-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.profile-card {
    background: var(--accent-bg);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.profile-avatar {
    position: relative;
    margin-bottom: 1.5rem;
}

.avatar-placeholder {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--secondary-bg);
    border: 3px solid var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    margin: 0 auto 1rem;
    box-shadow: var(--glow-primary);
}

.avatar-change {
    background: var(--secondary-color);
    color: var(--primary-bg);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-family: 'Orbitron', monospace;
    cursor: pointer;
    font-size: 0.8rem;
}

.profile-info h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.profile-role {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

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

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--secondary-color);
    font-family: 'Press Start 2P', monospace;
}

.stat-name {
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    margin-top: 0.25rem;
}

.profile-settings h4 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.setting-item {
    margin-bottom: 1.5rem;
}

.setting-item label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
    cursor: pointer;
}

.setting-input {
    background: var(--accent-bg);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 4px;
    font-family: 'Orbitron', monospace;
    width: 100%;
    transition: border-color 0.3s ease;
}

.setting-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
}

input[type="checkbox"] {
    accent-color: var(--primary-color);
    transform: scale(1.2);
}

.save-btn {
    background: var(--primary-color);
    color: var(--primary-bg);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    width: 100%;
    margin-top: 1rem;
}

.save-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--glow-secondary);
}

/* Модальное окно */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--secondary-bg);
    margin: 5% auto;
    padding: 2rem;
    border: 2px solid var(--primary-color);
    border-radius: 8px;
    width: 80%;
    max-width: 800px;
    position: relative;
    box-shadow: var(--glow-primary);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-close {
    color: var(--text-secondary);
    float: right;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: var(--danger-color);
}

/* Адаптивность */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .navigation {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
    
    .logo {
        font-size: 1.2rem;
    }
    
    .main-container {
        padding: 0 1rem;
    }
    
    .profile-container {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .profile-stats {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .file-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .file-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
}

/* Скроллбары */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--secondary-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}