* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    /* border: 2px solid red; */
}

body {
    min-height: 100vh;
    font-family: 'Arial', sans-serif;
    color: #fff;
    background-color: #1f1f1f;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

/* header */
.header {
    max-width: 1700px;
    width: 100%;
    height: auto;
    background-image: url('../asset/header-bg.png');
    background-size: cover;
    background-position: center;
    border-bottom: 12px solid royalblue;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
}

.header_content-wrapper {
    width: 100%;
    height: 450px;
    padding: 20px 50px;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: all 0.5s ease;
}

.header_logo {
    width: 150px;
    max-width: 100%;
    height: auto;
    align-self: flex-start;
}

.header_title {
    font-size: 70px;
    line-height: 1.2;
    text-align: center;
    margin: auto;
    transition: all 0.3s ease;
}

.header_title span {
    font-size: 48px;
    text-align: center;
    margin: 5px auto auto;
}

.header:hover .header_title {
    cursor: pointer;
    color: royalblue;
    text-shadow: 0 0 5px rgba(0, 0, 0, 0.8);
    transform: scale(1.005);
    transition: all 0.5s ease;
}

/* content */
.content {
    max-width: 1700px;
    width: 100%;
    height: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #f0f0f0;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
}

.content_item-wrapper {
    width: 60%;
    max-width: 1100px;
    height: auto;
    padding: 12px;
    border-radius: 15px;
    gap: 10px;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    margin: 100px 0;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

.content_item {
    flex: 1 1 calc(33.333% - 10px);
    height: 170px;
    border-radius: 15px;
    background-color: #333333;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease-in-out;
    overflow: hidden;
    cursor: pointer;
    position: relative;
}

.content_item i {
    font-size: 48px;
    text-align: center;
    color: #fff;
    margin-bottom: 12px;
    transition: transform 0.3s ease;
}

.content_item span {
    font-size: 21px;
    text-align: center;
    color: #fff;
}

/* Warna dan hover effect tiap item */
.content_item:nth-child(7),
.content_item:nth-child(8),
.content_item:nth-child(9),
.content_item:nth-child(10) {
    flex: 1 1 calc(25% - 10px);
}

.content_item:nth-child(1) {
    background: linear-gradient(135deg, #27ae60, #1e8449);
    box-shadow: 0 0 12px rgba(39, 174, 96, 0.4);
}

.content_item:nth-child(1):hover {
    background: linear-gradient(135deg, #1e8449, #145a32);
    box-shadow: 0 0 20px rgba(39, 174, 96, 0.7);
}

.content_item:nth-child(2) {
    background: linear-gradient(135deg, #3498db, #2e86c1);
    box-shadow: 0 0 12px rgba(52, 152, 219, 0.4);
}

.content_item:nth-child(2):hover {
    background: linear-gradient(135deg, #2e86c1, #1f618d);
    box-shadow: 0 0 20px rgba(52, 152, 219, 0.7);
}

.content_item:nth-child(3) {
    background: linear-gradient(135deg, #e67e22, #ca6f1e);
    box-shadow: 0 0 12px rgba(230, 126, 34, 0.4);
}

.content_item:nth-child(3):hover {
    background: linear-gradient(135deg, #ca6f1e, #873600);
    box-shadow: 0 0 20px rgba(230, 126, 34, 0.7);
}

.content_item:nth-child(4) {
    background: linear-gradient(135deg, #e74c3c, #cb4335);
    box-shadow: 0 0 12px rgba(231, 76, 60, 0.4);
}

.content_item:nth-child(4):hover {
    background: linear-gradient(135deg, #cb4335, #922b21);
    box-shadow: 0 0 20px rgba(231, 76, 60, 0.7);
}

.content_item:nth-child(5) {
    background: linear-gradient(135deg, #9b59b6, #884ea0);
    box-shadow: 0 0 12px rgba(155, 89, 182, 0.4);
}

.content_item:nth-child(5):hover {
    background: linear-gradient(135deg, #884ea0, #633974);
    box-shadow: 0 0 20px rgba(155, 89, 182, 0.7);
}

.content_item:nth-child(6) {
    background: linear-gradient(135deg, #1abc9c, #17a589);
    box-shadow: 0 0 12px rgba(26, 188, 156, 0.4);
}

.content_item:nth-child(6):hover {
    background: linear-gradient(135deg, #17a589, #0e6655);
    box-shadow: 0 0 20px rgba(26, 188, 156, 0.7);
}

.content_item:nth-child(7) {
    background: linear-gradient(135deg, #f39c12, #d68910);
    box-shadow: 0 0 12px rgba(243, 156, 18, 0.4);
}

.content_item:nth-child(7):hover {
    background: linear-gradient(135deg, #d68910, #9c640c);
    box-shadow: 0 0 20px rgba(243, 156, 18, 0.7);
}

.content_item:nth-child(8) {
    background: linear-gradient(135deg, #2980b9, #2471a3);
    box-shadow: 0 0 12px rgba(41, 128, 185, 0.4);
}

.content_item:nth-child(8):hover {
    background: linear-gradient(135deg, #2471a3, #1a5276);
    box-shadow: 0 0 20px rgba(41, 128, 185, 0.7);
}

.content_item:nth-child(9) {
    background: linear-gradient(135deg, #f1c40f, #d4ac0d);
    box-shadow: 0 0 12px rgba(241, 196, 15, 0.4);
}

.content_item:nth-child(9):hover {
    background: linear-gradient(135deg, #d4ac0d, #9a7d0a);
    box-shadow: 0 0 20px rgba(241, 196, 15, 0.7);
}

.content_item:nth-child(10) {
    background: linear-gradient(135deg, #7f8c8d, #707b7c);
    box-shadow: 0 0 12px rgba(127, 140, 141, 0.4);
}

.content_item:nth-child(10):hover {
    background: linear-gradient(135deg, #707b7c, #424949);
    box-shadow: 0 0 20px rgba(127, 140, 141, 0.7);
}

.content_item::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.0), rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.0));
    transition: left 0.5s ease;
    z-index: 2;
}

.content_item:hover {
    transform: translateY(-3px);
}

.content_item:hover::after {
    left: 100%;
}

.content_item:hover i {
    transform: scale(1.1);
}

.content_item:active {
    transform: translateY(1px);
    transition: all 0.1s ease;
}

/* footer */
.footer {
    max-width: 1700px;
    width: 100%;
    height: 40px;
    background-color: royalblue;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
}

.footer_copyright {
    font-size: 12px;
    transition: all 0.3s ease;
}

.footer:hover .footer_copyright {
    transform: scale(1.04);
    font-weight: 700;
    transition: all 0.5s ease;
}

.buble {
    position: fixed;
    bottom: 5%;
    right: 7%;
    height: 55%;
    z-index: 1000;
    animation: floaty 7s ease-in-out infinite;
}

@keyframes floaty{
  0%{transform:translateY(0) scale(1)}
  50%{transform:translateY(-16px) scale(1.05)}
  100%{transform:translateY(0) scale(1)}
}

/* Responsive Design */
@media (max-width: 1200px) {
    .header_content-wrapper {
        height: 380px;
        padding: 18px 40px;
    }

    .header_title {
        font-size: 64px;
    }

    .header_title span {
        font-size: 34px;
    }

    .content_item-wrapper {
        width: 80%;
    }

    .content_item {
        flex: 1 1 calc(50% - 10px) !important;
        height: 150px;
    }

    .buble {
        height: 35%;
        right: 5%;
    }
}

@media (max-width: 900px) {
    .header_content-wrapper {
        height: auto;
        padding: 16px 30px;
    }

    .header_title {
        font-size: 44px;
        line-height: 1.1;
        margin: 20px 0;
    }

    .header_title span {
        font-size: 20px;
        display: block;
    }

    .content_item-wrapper {
        width: 90%;
        margin: 40px 0;
    }

    .content_item {
        flex: 1 1 calc(100% - 10px) !important;
        height: 120px;
    }

    .content_item i {
        font-size: 36px;
    }

    .content_item span {
        font-size: 18px;
    }

    .header_logo {
        width: 120px;
    }

    .buble {
        height: 30%;
        right: 3%;
    }
}

@media (max-width: 480px) {
    .header_title {
        font-size: 34px;
    }

    .header_title span {
        font-size: 16px;
    }

    .content {
        padding: 40px 0;
    }

    .content_item {
        height: 110px;
        padding: 10px;
    }

    .footer {
        height: auto;
        padding: 12px 0;
        font-size: 14px;
    }

    .footer_copyright {
        font-size: 12px;
    }

    .buble {
        height: 25%;
        right: 2%;
    }
}