/* ============================================================================
   Базовые стили кнопок (общие для всех страниц)
   ============================================================================ */

.btn {
    padding: 16px 32px;
    border-radius: var(--radius-xl);
    font-weight: 700;
    font-size: 1.1rem;
    text-decoration: none;
    transition: all var(--transition-bounce);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
}

    .btn:focus-visible {
        outline: 2px solid var(--color-accent-blue);
        outline-offset: 2px;
    }

    .btn::before {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 0;
        height: 0;
        border-radius: 50%;
        background: rgba(255,255,255,0.2);
        transform: translate(-50%, -50%);
        transition: width 0.6s, height 0.6s;
    }

    .btn:hover::before {
        width: 300px;
        height: 300px;
    }

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent-blue), var(--color-accent-cyan));
    color: white;
    box-shadow: var(--shadow-lg);
}

    .btn-primary:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-xl);
    }

.btn-secondary {
    background: rgba(255,255,255,0.1);
    color: var(--color-text-primary);
    border: 2px solid rgba(255,255,255,0.2);
}

    .btn-secondary:hover {
        background: rgba(255,255,255,0.15);
        border-color: rgba(255,255,255,0.3);
        transform: translateY(-6px);
    }

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}