:root {
    --primary-color: #123e7c;
    --secondary-color: #e91e63;
    --accent-color: #ff4081;
    --light-bg: #f5f5f5;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow-x: hidden;
}

/* Header Styles */
.header-top {
    background: var(--primary-color);
    color: white;
    padding: 10px 0;
    font-size: 14px;
}

.navbar-main {
    background: var(--primary-color);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

    .navbar-main .nav-link {
        color: white !important;
        padding: 15px 25px !important;
        transition: all 0.3s;
        font-weight: 500;
    }

        .navbar-main .nav-link:hover {
            background: rgba(255,255,255,0.1);
        }

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 60px 0;
    color: white;
}

    .hero-section h1 {
        font-size: 2.5rem;
        font-weight: 700;
        margin-bottom: 20px;
        text-transform: uppercase;
    }

/* Timeline Section */
.timeline-section {
    padding: 60px 0;
}

.timeline-header {
    background: var(--primary-color);
    color: white;
    padding: 15px;
    border-radius: 5px 5px 0 0;
    margin-bottom: 0;
}

.timeline-content {
    background: white;
    padding: 20px;
    border-radius: 0 0 5px 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.event-item {
    padding: 15px;
    margin-bottom: 10px;
    border-left: 3px solid var(--secondary-color);
    background: #f9f9f9;
    transition: all 0.3s;
}

    .event-item:hover {
        transform: translateX(5px);
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }

.event-time {
    color: var(--secondary-color);
    font-weight: 600;
}

/* Accordion Styles */
.custom-accordion .accordion-button {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
    padding: 15px 20px;
}

    .custom-accordion .accordion-button:not(.collapsed) {
        background: var(--primary-color);
        color: white;
    }

    .custom-accordion .accordion-button::after {
        filter: brightness(0) invert(1);
    }

/* Registration Section */
.registration-section {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    padding: 30px;
    border-radius: 10px;
    margin: 30px 0;
}

    .registration-section h3 {
        margin-bottom: 20px;
    }

.btn-register {
    background: white;
    color: var(--secondary-color);
    padding: 10px 30px;
    border: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s;
}

    .btn-register:hover {
        transform: scale(1.05);
        box-shadow: 0 5px 20px rgba(0,0,0,0.2);
    }

/* Room Info */
.room-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    transition: all 0.3s;
}

    .room-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 5px 20px rgba(0,0,0,0.15);
    }

.room-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-top: 10px;
}

/* Footer */
.footer {
    background-image: url(./assets/images/bg-footer-02.jpg);
    color: white;
    padding: 110px 0 20px;
    position: relative;
    overflow: hidden;
    background-size: cover !important;
    background-repeat: no-repeat !important;
    background-position: 50% 50%;
}

    .footer::before {
        content: '';
        position: absolute;
        top: -50px;
        left: 0;
        width: 100%;
        height: 100px;
        background-size: cover;
    }

.footer-decoration {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 150px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 1.8rem;
    }

    .navbar-main .nav-link {
        padding: 10px 15px;
        font-size: 14px;
    }

    .timeline-section {
        padding: 30px 0;
    }

    .footer-decoration {
        display: none;
    }
}

/* Loading Animation */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}

.section-padding {
    padding: 20px 0;
}

.countdown-wrapper {
    padding: 10px;
}

.countdown-left {
    background: #123e7c;
    color: #fff;
    padding: 12px 28px;
    border-radius: 15px 0 0 15px;
    font-size: 26px;
    font-weight: 700;
}

    .countdown-left .avatar img {
        width: 40px;
        height: 40px;
        border-radius: 50%;
    }

.countdown-right {
    background: #ff4b1f;
    color: #fff;
    padding: 12px 28px;
    border-radius: 0 15px 15px 0;
    font-size: 26px;
    font-weight: 800;
}

.info-box {
    border-radius: 18px;
    padding: 24px 28px;
}

    .info-box ul {
        padding-left: 18px;
    }

    .info-box li {
        margin-bottom: 10px;
        line-height: 1.7;
    }

.bg-primary {
    background-color: #123e7c !important;
}

.bg-danger {
    background-color: #ff4b1f !important;
}

.notice-box {
    border-left: 4px solid #1f4c8c;
    padding: 14px 18px;
    background: #ffffff;
    color: #e53935;
    font-style: italic;
    font-size: 16px;
    line-height: 1.8;
    margin: 20px 0;
}

.text-primary {
    color: var(--primary-color) !important;
}

span.time-event {
    padding: 8px 15px;
    background-color: #ffffff;
    color: #ff0000;
    border-radius: 10px;
    margin-right: 10px;
}

.gallery-section {
    background: #fff;
}

.gallery-item {
    background: #fff;
}

.gallery-item-1 {
    height: 400px;
}

.gallery-item-2 {
    height: 300px;
}

.gallery-item-3 {
    height: 500px;
}

@media (max-width: 768px) {
    .gallery-item-1, .gallery-item-2, .gallery-item-3 {
        height: auto !important;
    }

    .gallery-item img {
        height: auto !important;
    }
}

.gallery-item img {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 8px;
    object-fit: cover;
}

p.updating {
    background-color: #123e7c;
    color: #ffffff;
    padding: 80px;
    font-size: 20px;
    font-weight: 700;
    border-radius: 10px;
    text-align: center;
}

.copyright {
    background: var(--primary-color);
    color: #ffffff;
}

.link-share-header {
    position: absolute;
    top: 22px;
    right: 15px;
}

    .link-share-header a {
        padding: 12px;
        color: #ffffff;
        border-radius: 10px;
        text-decoration: none;
        font-size: 15px;
        font-weight: 600;
        margin-left: 10px;
    }

        .link-share-header a.join-button {
            background-color: #123e7c;
        }

        .link-share-header a.share-button {
            background-color: #ff4b1f;
        }

@media (max-width: 991px) {
    .link-share-header {
        position: relative;
        padding-bottom: 30px;
        padding-top: 10px;
        text-align: center;
    }
}

a.address {
    color: #333333;
}

    a.address:hover {
        color: #123e7c;
    }

p {
    text-align: justify;
}

    p.copyright {
        text-align: center;
    }

ul.chat-right {
    position: fixed;
    right: 17px;
    z-index: 999;
    bottom: 35px;
    list-style: none;
}

    ul.chat-right > li a {
        display: block;
        text-align: center;
        color: #515151;
        line-height: 1;
        font-weight: 500;
    }

        ul.chat-right > li a span.icon-zalo {
            background: #018fe5 url("data:image/svg+xml,%3Csvg viewBox='0 0 97.4 87.2' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink'%3E%3Cpath fill='%23fff' d='M78.4,42c-1.4,0-2.4,0.6-3.2,1.7c-0.7,1-1,2.2-1,3.7c0,1.5,0.3,2.7,1,3.7c0.8,1.2,1.8,1.7,3.2,1.7 c1.4,0,2.5-0.6,3.2-1.7c0.7-1,1-2.2,1-3.7c0-1.4-0.3-2.6-1-3.6C80.8,42.6,79.7,42,78.4,42z' fill-rule='evenodd'%3E%3C/path%3E%3Cpath fill='%23fff' d='M48.8,0C21.9,0,0,19.5,0,43.6c0,11.9,5.4,22.7,14,30.6c2.2,2-5.4,10.5-9,11.3c10.4,2.9,20.7-3.4,23.2-2.4 c6.2,2.6,13.2,4,20.5,4c26.9,0,48.7-19.5,48.7-43.6C97.5,19.5,75.7,0,48.8,0z M27.8,58.2H14.6c-3.1,0-4.6-1.1-4.6-3.3 c0-1,0.6-2.4,1.8-4l11.8-15.6h-8.5c-3.1,0-4.7-1-4.7-3c0-2,1.6-3,4.7-3h11.2c3.8,0,5.7,1.1,5.7,3.2c0,1-0.6,2.3-1.9,4L18.5,52.2 h9.3c3.1,0,4.7,1,4.7,3C32.5,57.2,30.9,58.2,27.8,58.2z M54.9,53.8c0,3.1-1.1,4.7-3.2,4.7c-1.4,0-2.4-0.7-3.1-2.2 c-1.3,1.6-3.1,2.4-5.4,2.4c-2.9,0-5.3-1.2-7.2-3.5c-1.7-2.2-2.5-4.8-2.5-7.8c0-3,0.9-5.6,6.7-7.8c1.9-2.3,4.3-3.5,7.3-3.5 c2.2,0,3.9,0.8,5.1,2.3c0.7-1.4,8.8-2,3.1-2c2.1,0,3.2,1.5,3.2,4.6V53.8z M65.7,53.8c0,3.1-1.1,4.7-3.2,4.7c-2.1,0-3.2-1.6-3.2-4.7 V31.9c0-3.1,1.1-4.7,3.2-4.7c2.1,0,3.2,1.6,3.2,4.7V53.8z M78.4,58.9c-3.2,0-5.9-1.1-7.9-3.3c-2-2.2-3-4.9-3-8.1s1-6,3-8.1 c2-2.2,4.7-3.3,7.9-3.3c3.3,0,5.9,1.1,7.9,3.3c1.9,2.1,2.9,4.9,2.9,8.1s-1,6-2.9,8.1C84.2,57.8,81.6,58.9,78.4,58.9z' fill-rule='evenodd'%3E%3C/path%3E%3Cpath fill='%23fff' d='M44.4,42.2c-1.3,0-2.4,0.5-3.1,1.6c-0.7,1-1,2.1-1,3.5c0,1.4,0.3,2.6,1,3.6c0.8,1.1,1.8,1.7,3.2,1.7 c1.3,0,2.4-0.6,3.1-1.7c0.6-1,1-2.2,1-3.6c0-1.4-0.3-2.5-1-3.5C46.7,42.8,45.7,42.2,44.4,42.2z' fill-rule='evenodd'%3E%3C/path%3E%3C/svg%3E") no-repeat center;
            background-size: 75%;
            border-radius: 99px;
        }

        ul.chat-right > li a span.icon-messenger {
            background: #0665f7 url("data:image/svg+xml,%3Csvg viewBox='0 0 32 32' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink'%3E%3Cpath fill='%23fff' d='M16 6C9.925 6 5 10.56 5 16.185c0 3.205 1.6 6.065 4.1 7.932V28l3.745-2.056c1 .277 2.058.426 3.155.426 6.075 0 11-4.56 11-10.185C27 10.56 22.075 6 16 6zm1.093 13.716l-2.8-2.988-5.467 2.988 6.013-6.383 2.868 2.988 5.398-2.987-6.013 6.383z' fill-rule='evenodd'%3E%3C/path%3E%3C/svg%3E") no-repeat center;
            border-radius: 99px;
        }

        ul.chat-right > li a :is(i,span)[class*=icon-] {
            margin: auto;
            width: 50px;
            height: 50px;
            display: block;
        }

        ul.chat-right > li a span {
            font-size: .6em;
        }

.icon-zalo-social {
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 97.4 87.2' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink'%3E%3Cpath fill='%23fff' d='M78.4,42c-1.4,0-2.4,0.6-3.2,1.7c-0.7,1-1,2.2-1,3.7c0,1.5,0.3,2.7,1,3.7c0.8,1.2,1.8,1.7,3.2,1.7 c1.4,0,2.5-0.6,3.2-1.7c0.7-1,1-2.2,1-3.7c0-1.4-0.3-2.6-1-3.6C80.8,42.6,79.7,42,78.4,42z' fill-rule='evenodd'%3E%3C/path%3E%3Cpath fill='%23fff' d='M48.8,0C21.9,0,0,19.5,0,43.6c0,11.9,5.4,22.7,14,30.6c2.2,2-5.4,10.5-9,11.3c10.4,2.9,20.7-3.4,23.2-2.4 c6.2,2.6,13.2,4,20.5,4c26.9,0,48.7-19.5,48.7-43.6C97.5,19.5,75.7,0,48.8,0z M27.8,58.2H14.6c-3.1,0-4.6-1.1-4.6-3.3 c0-1,0.6-2.4,1.8-4l11.8-15.6h-8.5c-3.1,0-4.7-1-4.7-3c0-2,1.6-3,4.7-3h11.2c3.8,0,5.7,1.1,5.7,3.2c0,1-0.6,2.3-1.9,4L18.5,52.2 h9.3c3.1,0,4.7,1,4.7,3C32.5,57.2,30.9,58.2,27.8,58.2z M54.9,53.8c0,3.1-1.1,4.7-3.2,4.7c-1.4,0-2.4-0.7-3.1-2.2 c-1.3,1.6-3.1,2.4-5.4,2.4c-2.9,0-5.3-1.2-7.2-3.5c-1.7-2.2-2.5-4.8-2.5-7.8c0-3,0.9-5.6,6.7-7.8c1.9-2.3,4.3-3.5,7.3-3.5 c2.2,0,3.9,0.8,5.1,2.3c0.7-1.4,8.8-2,3.1-2c2.1,0,3.2,1.5,3.2,4.6V53.8z M65.7,53.8c0,3.1-1.1,4.7-3.2,4.7c-2.1,0-3.2-1.6-3.2-4.7 V31.9c0-3.1,1.1-4.7,3.2-4.7c2.1,0,3.2,1.6,3.2,4.7V53.8z M78.4,58.9c-3.2,0-5.9-1.1-7.9-3.3c-2-2.2-3-4.9-3-8.1s1-6,3-8.1 c2-2.2,4.7-3.3,7.9-3.3c3.3,0,5.9,1.1,7.9,3.3c1.9,2.1,2.9,4.9,2.9,8.1s-1,6-2.9,8.1C84.2,57.8,81.6,58.9,78.4,58.9z' fill-rule='evenodd'%3E%3C/path%3E%3Cpath fill='%23fff' d='M44.4,42.2c-1.3,0-2.4,0.5-3.1,1.6c-0.7,1-1,2.1-1,3.5c0,1.4,0.3,2.6,1,3.6c0.8,1.1,1.8,1.7,3.2,1.7 c1.3,0,2.4-0.6,3.1-1.7c0.6-1,1-2.2,1-3.6c0-1.4-0.3-2.5-1-3.5C46.7,42.8,45.7,42.2,44.4,42.2z' fill-rule='evenodd'%3E%3C/path%3E%3C/svg%3E") no-repeat center;
}


.social-icons {
    display: flex;
    align-items: center; 
    gap: 16px;
}

    .social-icons a {
        display: flex;
        align-items: center;
        justify-content: center;
        text-decoration: none;
    }

    .social-icons i {
        font-size: 28px;
        line-height: 1;
    }

    .social-icons img {
        height: 28px; 
        width: auto;
        display: block; 
    }

.event-content {
    display: flex;
    align-items: center;
    height: 70%;
}