* {
    padding: 0;
    margin: 0;
}

p {
    color: #ffffff;
}

h1 {
    color: #ffffff;
}

h2 {
    color: #ffffff;
}

ul {
    color: #ffffff;
}

.body-back {
    background-image: linear-gradient(rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.9)), url("/assets/background_vert.jpg");
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.position-fixed {
    position: fixed;
}

.position-sticky {
    position: sticky;
    top: 0;
    left: 0;
}

.content-to-left-side {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
}

.width-3 {
    width: 3%;
}

.width-auto {
    width: auto;
}

.width-100 {
    width: 100%;
}

.height-100 {
    height: 100%;
}

.height-6 {
    height: 6%;
}

.margin-left-top-1-percent {
    margin: 1% 0 0 1%;
}

.margin-left-top-5 {
    margin: 5% 0 0 5%;
}

.font-size-30px {
    font-size: 30px;
}

.border-circle {
    border-radius: 50%;
}

.color-white {
    color: white;
}

.back-btn-animation {
    border: none;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea, #764ba2);
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

    .back-btn-animation i {
        transition: all 0.4s ease;
    }

    .back-btn-animation:hover {
        transform: scale(1.15) rotate(-15deg);
        box-shadow: 0 15px 35px rgba(102, 126, 234, 0.4);
    }

    .back-btn-animation::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
        transition: left 0.7s ease;
        border-radius: 50%;
    }

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

    .back-btn-animation:active {
        transform: scale(0.9) rotate(0deg);
        transition: transform 0.1s ease;
    }

        .back-btn-animation:active i {
            color: #ffeb3b;
        }

.width-40-percent {
    width: 40%;
}

.width-50-percent {
    width: 50%;
}

.margin-top-bottom-5-percent {
    margin: 5% 0 5% 0;
}

.menu-logo {
    width: 30px;
    height: auto;
}