/*
 * ============================================================
 *   WEB BY DIVELLION VENTURA MANDIRI
 * ============================================================
 */

:root {

    --primary-navy: #002147;

    --secondary-blue: #004080;

    --accent-gold: #C5A059;

    --text-dark: #222222;

    --text-grey: #555555;

    --bg-light: #F8F9FA;

    --white: #FFFFFF;


    --section-padding: 80px 0;
    --container-width: 1140px;


    --font-heading: 'Montserrat', sans-serif;

    --font-body: 'Open Sans', sans-serif;

}

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

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    background-color: var(--white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--primary-navy);
    font-weight: 700;
    line-height: 1.3;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

.container {
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
}

.text-center {
    text-align: center;
}

header {
    background-color: var(--white);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);

    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    height: 140px;
    display: flex;
    align-items: center;
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-logo {
    height: 120px;

    width: auto;
    object-fit: contain;
}

.nav-logo+.nav-logo {
    padding-left: 20px;
    border-left: 1px solid #ddd;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 35px;
}

.menu-header,
.menu-footer,
.menu-footer-text {
    display: none;
}

.menu-links {
    display: flex;
    align-items: center;
    gap: 35px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    color: var(--primary-navy);
    letter-spacing: 0.5px;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background: var(--accent-gold);
    bottom: -5px;
    left: 0;
    transition: width 0.3s;
}

.nav-link:hover::after {
    width: 100%;
}

.btn-contact {
    padding: 10px 25px;
    background-color: var(--primary-navy);
    color: var(--white);
    border-radius: 4px;

    font-weight: 600;
    font-size: 0.9rem;
}

.btn-contact:hover {
    background-color: var(--secondary-blue);
    color: var(--white);
}

.hamburger {
    display: none;
}

#hero {
    height: 100vh;
    min-height: 600px;
    position: relative;
    overflow: hidden;
    background:
        linear-gradient(rgba(0, 33, 71, 0.9), rgba(0, 33, 71, 0.8)),

        url('background.png') no-repeat center center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    margin-top: 140px;

}

#hero::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;

    background-image:

        url("data:image/svg+xml,%3Csvg width='400' height='400' viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23FFFFFF' fill-opacity='0.04'%3E%3Cpath d='M50,80 Q65,65 80,80 Q65,95 50,80 M80,80 L90,75 V85 Z' /%3E%3Cpath d='M250,150 Q260,140 270,150 Q260,160 250,150 M270,150 L278,146 V154 Z' /%3E%3Cpath d='M120,300 Q140,285 160,300 Q140,315 120,300 M160,300 L172,295 V305 Z' /%3E%3C/g%3E%3C/svg%3E"),

        url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 20 L20 0 M20 40 L40 20 M0 20 L20 40 M20 0 L40 20' stroke='%23FFFFFF' stroke-opacity='0.06' fill='none' stroke-width='0.5' /%3E%3C/svg%3E");
    background-size: 400px 400px, 40px 40px;
    background-position: center, center bottom;
    background-repeat: repeat, repeat-x;
    mask-image: linear-gradient(to bottom, transparent 20%, black 80%, black 100%);
    -webkit-mask-image: linear-gradient(to bottom, transparent 20%, black 80%, black 100%);
}

#hero .hero-content {
    position: relative;
    z-index: 2;
}

#hero {
    background-color: var(--primary-navy);
}

.hero-content {
    max-width: 900px;
    padding: 0 20px;
}

.hero-supertitle {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--accent-gold);
    margin-bottom: 20px;
    font-weight: 600;
}

.hero-title {
    font-size: 3.2rem;

    margin-bottom: 15px;
    color: var(--white);
    font-weight: 800;
}

.hero-acronym {
    font-size: 1.8rem;
    font-weight: 300;
    color: #e0e0e0;
    margin-bottom: 30px;
    display: block;
}

.hero-theme {
    font-size: 1.25rem;
    font-weight: 400;
    font-style: italic;
    color: #f0f0f0;
    margin-bottom: 50px;
    border-left: 4px solid var(--accent-gold);
    padding-left: 20px;
    display: inline-block;
    text-align: left;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn {
    padding: 15px 40px;
    font-family: var(--font-heading);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
    border-radius: 4px;
    transition: all 0.3s;
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-lg-primary {
    background-color: var(--accent-gold);
    color: var(--primary-navy);
}

.btn-lg-primary:hover {
    background-color: #d4b06a;
    transform: translateY(-2px);
}

.btn-lg-outline {
    background-color: transparent;
    border-color: var(--white);
    color: var(--white);
}

.btn-lg-outline:hover {
    background-color: var(--white);
    color: var(--primary-navy);
}

section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.2rem;
    color: var(--primary-navy);
    margin-bottom: 15px;
}

.section-line {
    width: 80px;
    height: 4px;
    background-color: var(--accent-gold);
    margin: 0 auto;
}

#about {
    background-color: var(--white);
}

#about {
    background-color: var(--white);
    overflow: hidden;
}

.about-content-wrapper {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-text {
    flex: 1;
    font-size: 1.1rem;
    color: var(--text-grey);
    text-align: justify;
}

.about-image {
    flex: 1;
    height: 400px;
    background: url('unsri_landmark.jpg') no-repeat center center/cover;
    border-radius: 8px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    position: relative;
}

.about-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 33, 71, 0.4), transparent);
    border-radius: 8px;
}

.objectives-wrapper {
    display: flex;
    justify-content: space-between;
    gap: 30px;
    margin-top: 50px;
}

.objective-box {
    flex: 1;
    background: var(--bg-light);
    padding: 30px;
    border-top: 4px solid var(--primary-navy);
    transition: transform 0.3s;
}

.objective-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.objective-box h4 {
    margin-bottom: 15px;
    color: var(--secondary-blue);
    display: flex;
    align-items: center;
    gap: 10px;
}

.objective-box i {
    color: var(--accent-gold);
}

#speakers {
    background-color: var(--bg-light);
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.speaker-card {
    background: var(--white);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    text-align: center;
    padding: 40px 20px;
    border: 1px solid #eee;
    transition: 0.3s;
}

.speaker-card:hover {
    border-color: var(--accent-gold);
}

.speaker-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background-color: #eee;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: #ccc;
    border: 4px solid var(--bg-light);
}

.speaker-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.speaker-uni {
    font-size: 0.9rem;
    color: var(--text-grey);
    font-weight: 500;
}

.scope-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);

    gap: 30px;
}

.scope-item {
    background: var(--white);
    padding: 30px;
    border-left: 5px solid var(--accent-gold);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
    display: block;

}

.scope-item:hover {
    transform: translateY(-5px);
}

.scope-item h4 {
    color: var(--primary-navy);
    font-size: 1.1rem;
    margin-bottom: 15px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

.scope-item ul {
    list-style: disc;
    padding-left: 20px;
    color: var(--text-grey);
    font-size: 0.9rem;
}

.scope-item li {
    margin-bottom: 5px;
}

#dates {
    background-color: var(--primary-navy);
    color: var(--white);
}

.dates-fees-container {
    display: flex;
    gap: 60px;
}

.df-col {
    flex: 1;
}

.df-title {
    color: var(--white);
    border-bottom: 2px solid var(--accent-gold);
    padding-bottom: 15px;
    margin-bottom: 30px;
    font-size: 1.5rem;
}

.timeline-list li {
    display: flex;
    justify-content: space-between;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.timeline-date {
    font-weight: 700;
    color: var(--accent-gold);
}

.fee-table {
    width: 100%;
    border-collapse: collapse;
}

.fee-table th,
.fee-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.fee-table th {
    color: var(--accent-gold);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.85);

    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: #fefefe;
    margin: 5% auto;
    padding: 0;
    border: 1px solid #888;
    width: 80%;
    max-width: 800px;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
    animation: animatetop 0.4s;
    position: relative;
}

@keyframes animatetop {
    from {
        top: -300px;
        opacity: 0
    }

    to {
        top: 0;
        opacity: 1
    }
}

.close-modal {
    color: white;
    float: right;
    font-size: 28px;
    font-weight: bold;
    position: absolute;
    top: 10px;
    right: 25px;
    cursor: pointer;
}

.close-modal:hover {
    color: var(--accent-gold);
}

#flyerImage {
    margin: 0 auto;
    padding: 10px;
    background: #fff;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid #ddd;
}

.flyer-responsive {
    width: 100%;
    height: auto;
    display: block;
}

.partners-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
}

.partner-logo-box {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.partner-logo-box img {
    height: 80px;

    width: auto;
    object-fit: contain;

    transition: all 0.3s ease;
}

.partner-logo-box:hover img {
    transform: scale(1.05);
}

.partner-logo-box span {
    font-weight: 600;
    color: var(--primary-navy);
    font-size: 0.9rem;
}

.partner-divider {
    height: 60px;
    width: 2px;
    background-color: #ddd;
}

#venue {
    position: relative;
    background: url('unsri_landmark.jpg') no-repeat center center/cover;
    background-attachment: fixed;

    height: 60vh;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.venue-overlay {
    background: rgba(0, 33, 71, 0.6);

    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.venue-title {
    color: var(--white);
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.venue-subtitle {
    color: #eee;
    font-size: 1.5rem;
    font-weight: 300;
    margin-top: 20px;
}

footer {
    position: relative;
    color: #eee;
    padding: 80px 0 30px;
    border-top: 5px solid var(--accent-gold);
    background: #00152e;

}

.relative-z {
    position: relative;
    z-index: 10;

}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-info h3 {
    color: var(--white);
    margin-bottom: 20px;
}

.footer-contact-item {
    margin-bottom: 10px;
    display: flex;
    gap: 10px;
    align-items: center;
}

.footer-contact-item i {
    color: var(--accent-gold);
}

@media screen and (max-width: 992px) {
    .speakers-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .scope-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .dates-fees-container {
        flex-direction: column;
    }

    .about-text {
        column-count: 1;
    }

    .objectives-wrapper {
        flex-direction: column;
    }
}

@media screen and (max-width: 768px) {


    .section-title {
        font-size: 1.8rem;
    }

    section {
        padding: 50px 0;
    }


    header {
        height: 80px;

        padding: 0 20px;

    }

    .navbar-container {
        padding: 0;

        justify-content: space-between;
    }




    .menu-header,
    .menu-footer,
    .menu-footer-text {
        display: flex;
    }

    .menu-footer {
        display: block;
    }

    .menu-footer-text {
        display: block;
    }


    .menu-links {
        display: block;
        padding: 12px 0;
        flex: 1;
    }


    .hamburger {
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        width: 28px;
        height: 28px;
        cursor: pointer;
        padding: 5px;
        margin-right: -5px;
        z-index: 999;
    }

    .hamburger-line {
        display: block;
        width: 100%;
        height: 2px;
        background-color: var(--primary-navy);
        border-radius: 2px;
        transition: all 0.3s ease;
    }

    .hamburger-line:nth-child(2) {
        width: 70%;
    }


    .hamburger.active .hamburger-line:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .hamburger.active .hamburger-line:nth-child(2) {
        opacity: 0;
        transform: translateX(-10px);
    }

    .hamburger.active .hamburger-line:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }


    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 300px;
        height: 100vh;
        background: linear-gradient(180deg, #001a35 0%, #00152e 100%);
        box-shadow: -5px 0 25px rgba(0, 0, 0, 0.3);
        display: flex;
        flex-direction: column;
        transition: right 0.35s cubic-bezier(0.22, 1, 0.36, 1);
        z-index: 1001;
    }

    .nav-menu.active {
        right: 0;
    }


    .menu-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 24px 24px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        gap: 20px;
    }

    .menu-brand {
        color: var(--accent-gold);
        font-family: var(--font-heading);
        font-size: 1rem;
        font-weight: 700;
        letter-spacing: 2px;
    }


    .nav-close-btn {
        width: 36px;
        height: 36px;
        min-width: 36px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1rem;
        cursor: pointer;
        color: rgba(255, 255, 255, 0.6);
        border: 1px solid rgba(255, 255, 255, 0.15);
        border-radius: 8px;
        background: rgba(255, 255, 255, 0.05);
        transition: all 0.2s;
        padding: 0;
    }

    .nav-close-btn:hover {
        color: var(--white);
        border-color: rgba(255, 255, 255, 0.3);
        background: rgba(255, 255, 255, 0.1);
    }


    .menu-links {
        list-style: none;
        margin: 0;
        padding: 16px 0;
        flex: 1;
    }

    .menu-links li {
        opacity: 0;
        transform: translateX(20px);
        transition: opacity 0.3s ease, transform 0.3s ease;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .menu-links li:last-child {
        border-bottom: none;
    }

    .nav-menu.active .menu-links li {
        opacity: 1;
        transform: translateX(0);
    }

    .nav-menu.active .menu-links li:nth-child(1) {
        transition-delay: 0.08s;
    }

    .nav-menu.active .menu-links li:nth-child(2) {
        transition-delay: 0.12s;
    }

    .nav-menu.active .menu-links li:nth-child(3) {
        transition-delay: 0.16s;
    }

    .nav-menu.active .menu-links li:nth-child(4) {
        transition-delay: 0.20s;
    }

    .nav-menu.active .menu-links li:nth-child(5) {
        transition-delay: 0.24s;
    }

    .nav-link {
        display: block;
        padding: 18px 24px;
        color: rgba(255, 255, 255, 0.8);
        font-size: 0.9rem;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 1.5px;
        text-align: left;
        transition: all 0.2s ease;
        border-left: 3px solid transparent;
    }

    .nav-link:hover,
    .nav-link:active {
        color: var(--white);
        background: rgba(255, 255, 255, 0.04);
        border-left-color: var(--accent-gold);
        padding-left: 30px;
    }

    .nav-link:hover::after {
        display: none;
    }


    .btn-contact {
        margin: 8px 24px 0 !important;
        text-align: center !important;
        background: transparent !important;
        border: 1.5px solid var(--accent-gold) !important;
        color: var(--accent-gold) !important;
        font-size: 0.8rem !important;
        padding: 10px 16px !important;
        border-radius: 4px !important;
        letter-spacing: 1.5px;
        transition: all 0.3s;
        border-left-width: 1.5px !important;
    }

    .btn-contact:hover {
        background: var(--accent-gold) !important;
        color: var(--primary-navy) !important;
    }


    .nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(2px);
        -webkit-backdrop-filter: blur(2px);
        z-index: 1000;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
    }

    .nav-overlay.active {
        opacity: 1;
        pointer-events: auto;
    }


    .menu-footer {
        padding: 20px 24px;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .menu-footer-text {
        font-size: 0.65rem;
        text-transform: uppercase;
        letter-spacing: 2px;
        color: rgba(255, 255, 255, 0.3);
        margin-bottom: 12px;
    }

    .menu-socials {
        display: flex;
        gap: 10px;
    }

    .menu-socials a {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 32px;
        height: 32px;
        border-radius: 50%;
        border: 1px solid rgba(255, 255, 255, 0.1);
        color: rgba(255, 255, 255, 0.4);
        font-size: 0.75rem;
        transition: all 0.2s;
    }

    .menu-socials a:hover {
        color: var(--accent-gold);
        border-color: var(--accent-gold);
        background: rgba(255, 255, 255, 0.05);
    }

    .nav-logo {
        height: 40px;

        width: auto;
        object-fit: contain;
    }


    .about-content-wrapper {
        flex-direction: column;
    }

    .about-image {
        height: 250px;
        order: -1;

        margin-bottom: 30px;
    }


    #hero {
        margin-top: 80px;
        min-height: auto;
        padding: 100px 0;

    }

    .hero-title {
        font-size: 2rem;
        line-height: 1.25;
        margin-bottom: 20px;
    }

    .hero-acronym {
        font-size: 1.2rem;
        margin-bottom: 20px;
    }

    .hero-theme {
        font-size: 1rem;
        padding-left: 15px;
        margin-bottom: 30px;
        border-left-width: 3px;
    }


    .logo-group {
        gap: 10px;
    }

    .nav-logo {
        height: 30px;
    }


    .nav-logo+.nav-logo {
        padding-left: 10px;
    }


    .hero-buttons {
        flex-direction: column;
        gap: 15px;
        width: 100%;
        max-width: 320px;
        margin: 0 auto;
    }

    .btn {
        width: 100%;
        padding: 12px 20px;
    }


    .speakers-grid {
        grid-template-columns: 1fr;
    }

    .scope-grid {
        grid-template-columns: 1fr;
    }

    .objective-box {
        margin-bottom: 20px;
    }


    .fee-table {
        font-size: 0.9rem;
    }

    .fee-table th,
    .fee-table td {
        padding: 10px;
    }


    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }

    .footer-contact-item {
        justify-content: center;
    }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-100 {
    transition-delay: 0.1s;
}

.delay-200 {
    transition-delay: 0.2s;
}

.delay-300 {
    transition-delay: 0.3s;
}

.delay-400 {
    transition-delay: 0.4s;
}