/* About Us */
.au-wrap {
    background: #161616;
    border: 1px solid #2b2b2b;
    border-radius: 22px;
    padding: 15px;
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.au-header h2 {
    margin: 0 0 8px;
    font-size: 28px;
    font-weight: 700;
    color: var(--color-white);
}

.au-header p {
    margin: 0;
    color: #bdbdbd;
    font-size: 14px;
}

.au-grid {
    margin-top: 10px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.au-card {
    background: #0f0f0f;
    border: 1px solid #222;
    border-radius: 18px;
    padding: 15px;
    transition: .3s;
    display: flex;
    flex-direction: column;
}

.au-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-main);
    box-shadow: 0 12px 35px rgba(0, 0, 0, .35);
}

.au-icon {
    width: 54px;
    height: 54px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    background: #1b1b1b;
}

.au-icon i {
    font-size: 24px;
}

/* màu icon */
.au-card:nth-child(1) i {
    color: #38d66b;
}

.au-card:nth-child(2) i {
    color: #ffcb45;
}

.au-card:nth-child(3) i {
    color: #6da8ff;
}

.au-card:nth-child(4) i {
    color: #ff6b4a;
}

.au-card h3 {
    font-size: 16px;
    color: var(--color-white);
    font-weight: 700;
}

.au-card p {
    margin: 0;
    color: #b8b8b8;
    font-size: 13px;
}

.au-footer {
    margin-top: 30px;
    display: flex;
    justify-content: flex-end;
}

.au-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-white);
    padding: 10px 20px;
    border-radius: 999px;
    background: #4a3b2c;
    border: 1px solid var(--color-main);
    transition: .3s;
    font-weight: 600;
}

.au-btn:hover {
    background: var(--color-main);
    color: var(--color-white);
}

.au-btn i {
    transition: .3s;
}

.au-btn:hover i {
    transform: translateX(4px);
}

/* Tablet */
@media(max-width: 992px) {
    .au-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .au-header h2 {
        font-size: 24px;
    }
}

/* Mobile */
@media(max-width: 768px) {
    .au-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .au-footer {
        justify-content: center;
    }

    .au-btn {
        width: 100%;
        justify-content: center;
    }

    .au-header h2 {
        font-size: 22px;
    }

    .au-header p {
        font-size: 14px;
    }
}