:root {
    --dark-bg: #0a0a0a;
    --darker-bg: #050505;
    --card-bg: #1a1a1a;
    --accent: #4361ee;
    --accent-hover: #3a56d4;
    --text: #f8f9fa;
    --text-light: #e9ecef;
    --text-muted: #adb5bd;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    display: 'none';
    background-color: var(--dark-bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

li{
    padding-bottom: 2%;
}

/* кнопки */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--accent);
    color: white;
    box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(67, 97, 238, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Плавающая кнопка */
.floating-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    background-color: var(--accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 5px 20px rgba(67, 97, 238, 0.4);
    z-index: 100;
    transition: all 0.3s ease;
    text-decoration: none;
}

.floating-btn:hover {
    transform: scale(1.1) translateY(-5px);
    background-color: var(--accent-hover);
}

/* Прелоадер */
.preloader {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: var(--dark-bg);
        display: flex;
        justify-content: center;
        align-items: center;
        z-index: 9999;
        transition: opacity 0.5s ease;
    }
    
    .loader .brain {
        font-size: 4rem;
        color: var(--accent);
        animation: pulse 2s infinite;
    }
    
    @keyframes pulse {
        0% { transform: scale(1); opacity: 1; }
        50% { transform: scale(1.2); opacity: 0.7; }
        100% { transform: scale(1); opacity: 1; }
    }