:root {
    --blue: #087f8c;
    --blue-dark: #086873;
    --dark: #14505b;
    --navy: #153744;
    --sky: #45b8c4;
    --gold: #d8ad4c;
    --gold-light: #f4d982;
    --cream: #fffaf0;
    --text: #304650;
    --muted: #71838c;
    --line: #dfe9ec;
    --pale: #edf8f8;
    --white: #ffffff;
    --shadow: 0 12px 35px rgba(21, 55, 68, .09);
    --radius: 12px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background: #f3f7fa;
    line-height: 1.7;
    overflow-x: hidden;
}

body.menu-open {
    overflow: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select,
textarea {
    font: inherit;
}

button {
    -webkit-tap-highlight-color: transparent;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: min(1150px, calc(100% - 36px));
    margin-inline: auto;
}

/* =========================
   TOPBAR
========================= */

.topbar {
    position: relative;
    z-index: 1;
    padding: 7px 0;
    background: var(--navy);
    color: var(--white);
    font-size: 11px;
}

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.topbar a,
.text-link {
    color: #bd8d0b;
    font-weight: 700;
}

.topbar a:hover,
.text-link:hover {
    color: var(--blue);
}

/* =========================
   HEADER DAN NAVBAR
========================= */

.site-header {
    position: relative;
    z-index: 1002;
    background: var(--cream);
    border-bottom: 3px solid var(--gold);
}

.nav {
    position: relative;
    min-height: 82px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    flex-shrink: 0;
}

.brand-logo {
    width: 49px;
    height: 49px;
    flex: 0 0 49px;
    display: grid;
    place-items: center;
    border: 2px solid var(--gold);
    border-radius: 50%;
    background: var(--white);
    color: var(--blue);
    font-family: Georgia, serif;
    font-weight: 700;
    font-size: 17px;
    transition: transform .35s;
}

.brand:hover .brand-logo {
    transform: rotate(15deg);
}

.brand-name {
    color: var(--dark);
    font-family: Georgia, serif;
    font-size: 23px;
    font-weight: 700;
    letter-spacing: 2px;
    line-height: 1.3;
}

.brand-name small {
    display: block;
    margin-top: 3px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 7px;
    letter-spacing: .4px;
    line-height: 1.5;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 19px;
}

.nav-links a {
    position: relative;
    display: inline-block;
    color: var(--dark);
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
    transition: color .25s, background .25s;
}

.nav-links a:not(.nav-register)::after {
    content: "";
    position: absolute;
    bottom: -7px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: width .25s;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a.active,
.nav-links a:hover {
    color: var(--blue);
}

.nav-links .nav-register {
    padding: 10px 15px;
    border: 1px solid var(--blue);
    border-radius: 4px;
    background: var(--blue);
    color: var(--white);
    transition: background .25s, border-color .25s;
}

.nav-links .nav-register:hover,
.nav-links .nav-register.active {
    border-color: var(--dark);
    background: var(--dark);
    color: var(--white);
}

/* Tombol hamburger */

.menu-toggle {
    display: none;
    width: 43px;
    height: 43px;
    flex: 0 0 43px;
    padding: 8px;
    border: 1px solid #dce5eb;
    border-radius: 6px;
    background: var(--white);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2.5px;
    margin: 5px 0;
    border-radius: 5px;
    background: var(--dark);
    transition: transform .3s, opacity .3s;
}

.menu-toggle.active span:first-child {
    transform: translateY(7.5px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:last-child {
    transform: translateY(-7.5px) rotate(-45deg);
}

/* Backdrop hanya aktif pada tampilan mobile */

.menu-backdrop {
    display: none;
}

/* =========================
   CAMPUS SLIDER
========================= */

.campus-slider {
    position: relative;
    isolation: isolate;
    height: clamp(330px, 43vw, 540px);
    overflow: hidden;
    background: var(--dark);
}

.slides,
.slide {
    position: absolute;
    inset: 0;
}

.slide {
    z-index: 0;
    visibility: hidden;
    opacity: 0;
    transform: scale(1.04);
    transition:
        opacity .8s ease,
        transform 5s ease,
        visibility .8s ease;
}

.slide.active {
    z-index: 1;
    visibility: visible;
    opacity: 1;
    transform: scale(1);
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.slide::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        rgba(3, 35, 61, .88),
        rgba(3, 47, 78, .58) 52%,
        rgba(3, 35, 61, .12)
    );
    pointer-events: none;
}

.slide-caption {
    position: absolute;
    z-index: 2;
    left: max(30px, calc((100% - 1150px) / 2));
    bottom: 90px;
    width: min(650px, 75%);
    color: var(--white);
    opacity: 0;
    transform: translateY(20px);
}

.slide.active .slide-caption {
    animation: captionIn .8s .2s ease forwards;
}

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

.eyebrow {
    display: inline-block;
    margin-bottom: 12px;
    padding: 5px 10px;
    border: 1px solid rgba(226, 183, 53, .7);
    border-radius: 3px;
    color: var(--gold-light);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.5px;
}

.slide-caption h1,
.slide-caption h2 {
    margin-bottom: 12px;
    font-family: Georgia, serif;
    font-size: clamp(29px, 4.2vw, 50px);
    line-height: 1.2;
}

.slide-caption h1 span,
.slide-caption h2 span {
    color: var(--gold-light);
}

.slide-caption p {
    margin-bottom: 5px;
    color: #edf6ff;
    font-size: 13px;
    line-height: 1.7;
}

.slide-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

/* Tombol umum */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 11px 17px;
    border: 1px solid transparent;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
    line-height: 1.5;
    text-align: center;
    cursor: pointer;
    transition:
        transform .25s,
        background .25s,
        color .25s,
        box-shadow .25s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, .12);
}

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

.btn-gold:hover {
    background: #f4d260;
    color: var(--navy);
}

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

.btn-outline:hover {
    background: var(--white);
    color: var(--dark);
}

.btn-primary {
    background: var(--blue);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--dark);
    color: var(--white);
}

.btn-full {
    width: 100%;
}

.slider-arrow {
    position: absolute;
    top: 50%;
    z-index: 5;
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border: 1px solid rgba(255, 255, 255, .5);
    border-radius: 50%;
    background: rgba(6, 45, 74, .7);
    color: var(--white);
    font-size: 22px;
    cursor: pointer;
    transform: translateY(-50%);
    transition: background .25s;
}

.slider-arrow:hover {
    background: var(--blue);
}

.slider-arrow.prev {
    left: 17px;
}

.slider-arrow.next {
    right: 17px;
}

.slider-dots {
    position: absolute;
    z-index: 5;
    bottom: 23px;
    left: 50%;
    display: flex;
    gap: 9px;
    transform: translateX(-50%);
}

.slider-dot {
    width: 9px;
    height: 9px;
    padding: 0;
    border: 1px solid var(--white);
    border-radius: 20px;
    background: transparent;
    cursor: pointer;
    transition: width .3s, background .3s;
}

.slider-dot.active {
    width: 29px;
    background: var(--gold);
    border-color: var(--gold);
}

/* =========================
   INFO KONFERENSI
========================= */

.quick-info {
    background: var(--dark);
    border-bottom: 3px solid var(--gold);
    color: var(--white);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-item {
    min-width: 0;
    padding: 17px;
    border-right: 1px solid rgba(255, 255, 255, .12);
}

.info-item:last-child {
    border-right: 0;
}

.info-item span,
.info-item strong {
    display: block;
}

.info-item span {
    margin-bottom: 5px;
    color: var(--gold-light);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1px;
}

.info-item strong {
    font-size: 12px;
    overflow-wrap: anywhere;
}

/* =========================
   KONTEN HALAMAN
========================= */

.section-space {
    padding-top: 38px;
    padding-bottom: 42px;
}

.section-heading {
    max-width: 720px;
    margin: 0 auto 28px;
    text-align: center;
}

.dark-eyebrow {
    color: var(--blue);
}

.section-heading h2,
.page-heading h1 {
    color: var(--dark);
    font-family: Georgia, serif;
    font-size: clamp(26px, 4vw, 36px);
    line-height: 1.3;
}

.section-heading p,
.page-heading p {
    margin-top: 9px;
    color: var(--muted);
    font-size: 13px;
}

.text-link {
    display: inline-block;
    margin-top: 13px;
    font-size: 12px;
}

.home-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.content-card {
    min-width: 0;
    padding: 23px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
    box-shadow: var(--shadow);
    animation: panelIn .6s ease both;
}

@keyframes panelIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

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

.content-card h2,
.content-card h3 {
    color: var(--blue);
    font-family: Georgia, serif;
}

.content-card h2 {
    font-size: 23px;
    line-height: 1.4;
}

.content-card h3 {
    font-size: 19px;
    line-height: 1.4;
}

.content-card p {
    margin: 12px 0;
    color: #526475;
    font-size: 13px;
    overflow-wrap: anywhere;
}

.gold-line {
    height: 2px;
    margin: 13px 0;
    background: linear-gradient(to right, var(--gold), #f5edd6);
}

.date-list,
.topic-list {
    margin: 10px 0 17px;
    list-style: none;
}

.date-list li {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 11px 0 11px 14px;
    border-bottom: 1px dashed var(--line);
}

.date-list li::before {
    content: "";
    position: absolute;
    top: 18px;
    left: 0;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--gold);
}

.date-list strong {
    color: var(--dark);
    font-size: 12px;
}

.date-list span {
    color: var(--muted);
    font-size: 12px;
}

.topic-list li {
    padding: 9px 0;
    border-bottom: 1px solid #e9edf1;
    font-size: 12px;
}

.topic-list li::before {
    content: "✦";
    margin-right: 9px;
    color: #c69c21;
}

.register-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-top: 25px;
    padding: 24px;
    border: 1px solid #c9dfec;
    border-left: 4px solid var(--gold);
    border-radius: 6px;
    background: #eaf5fc;
}

.register-banner h2 {
    color: var(--dark);
    font-family: Georgia, serif;
    font-size: 23px;
    line-height: 1.4;
}

.register-banner p {
    margin-top: 5px;
    color: var(--muted);
    font-size: 12px;
}

/* =========================
   HALAMAN DALAM
========================= */

.page-heading {
    margin-bottom: 25px;
}

.page-heading h1 {
    margin-top: 3px;
}

.registration-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .8fr);
    align-items: start;
    gap: 22px;
}

.registration-info {
    background: #f9fcfe;
}

.registration-info p {
    padding-bottom: 11px;
    border-bottom: 1px solid #e4ebef;
}

.form-group {
    margin-bottom: 17px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--dark);
    font-size: 12px;
    font-weight: 700;
}

.form-group input,
.form-group select,
.form-group textarea {
    display: block;
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
    border: 1px solid #d5e0e8;
    border-radius: 4px;
    outline: none;
    background: var(--white);
    color: var(--text);
    font-size: 13px;
    transition: border-color .2s, box-shadow .2s;
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(8, 99, 155, .1);
}

.form-note {
    margin-top: 13px;
    color: var(--muted);
    font-size: 11px;
}

.alert {
    margin-bottom: 15px;
    padding: 12px;
    border-radius: 4px;
    font-size: 12px;
}

.alert-error {
    border: 1px solid #efc5c5;
    background: #fff0f0;
    color: #9c2525;
}

.alert-success {
    border: 1px solid #b7dfc2;
    background: #effaf2;
    color: #176b36;
}

.table-wrap {
    width: 100%;
    overflow-x: auto;
}

.program-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}

.program-table th {
    padding: 12px;
    background: var(--blue);
    color: var(--white);
    text-align: left;
}

.program-table td {
    padding: 12px;
    border-bottom: 1px solid #e2eaf0;
    overflow-wrap: anywhere;
}

.program-table tbody tr:nth-child(even) {
    background: var(--pale);
}

.speaker-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.speaker-card {
    border-left: 3px solid var(--gold);
    transition: transform .25s, box-shadow .25s;
}

.speaker-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.speaker-card p {
    color: var(--blue);
    font-weight: 700;
}

.speaker-card span {
    color: var(--muted);
    font-size: 12px;
}

/* =========================
   FOOTER
========================= */

.site-footer {
    position: relative;
    padding-top: 33px;
    background: var(--navy);
    border-top: 3px solid var(--gold);
    color: #e5f0f8;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr .7fr 1fr;
    gap: 28px;
    padding-bottom: 24px;
}

.footer-grid h3 {
    margin-bottom: 12px;
    color: var(--gold-light);
    font-family: Georgia, serif;
    font-size: 17px;
}

.footer-grid p,
.footer-grid a {
    display: block;
    margin-bottom: 8px;
    overflow-wrap: anywhere;
    font-size: 12px;
}

.footer-grid a:hover {
    color: var(--gold-light);
}

.footer-bottom {
    padding: 14px 0;
    border-top: 1px solid rgba(255, 255, 255, .15);
    color: #b9ccdc;
    text-align: center;
    font-size: 11px;
}

/* =========================
   HALAMAN ERROR
========================= */

.error-page {
    padding-top: 70px;
    padding-bottom: 90px;
    text-align: center;
}

.error-code {
    color: var(--blue);
    font-size: 75px;
    font-weight: 700;
}

/* =========================
   RESPONSIVE TABLET
========================= */

@media (max-width: 950px) {
    .nav-links {
        gap: 12px;
    }

    .nav-links a {
        font-size: 11px;
    }

    .brand-name {
        font-size: 20px;
    }

    .brand-name small {
        max-width: 230px;
    }
}

/* =========================
   RESPONSIVE MOBILE
========================= */

@media (max-width: 760px) {
    .container {
        width: calc(100% - 26px);
    }

    .topbar-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 2px;
    }

    /*
       Header menjadi lapisan di atas backdrop.
       Panel menu dan tombol tetap bisa diklik.
    */

    .site-header {
        position: relative;
        z-index: 1002;
    }

    .nav {
        min-height: 73px;
        gap: 10px;
    }

    .brand {
        gap: 8px;
        min-width: 0;
    }

    .brand-logo {
        width: 42px;
        height: 42px;
        flex-basis: 42px;
        font-size: 15px;
    }

    .brand-name {
        font-size: 19px;
        letter-spacing: 1px;
    }

    .brand-name small {
        max-width: 220px;
        font-size: 6px;
        letter-spacing: 0;
    }

    .menu-toggle {
        position: relative;
        z-index: 1004;
        display: block;
    }

    /*
       Panel menu berada di dalam header.
       Jangan menempatkan backdrop di atas panel.
    */

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        z-index: 1003;

        display: flex;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        gap: 0;

        width: min(84vw, 330px);
        height: 100vh;
        height: 100dvh;

        padding: 95px 22px 25px;
        overflow-x: hidden;
        overflow-y: auto;
        overscroll-behavior: contain;

        background: var(--cream);
        box-shadow: -10px 0 35px rgba(0, 0, 0, .15);

        transform: translateX(105%);
        visibility: hidden;
        pointer-events: none;

        transition:
            transform .35s ease,
            visibility .35s ease;
    }

    .nav-links.open {
        transform: translateX(0);
        visibility: visible;
        pointer-events: auto;
    }

    .nav-links a {
        position: relative;
        display: block;
        width: 100%;
        padding: 13px 10px;

        border-bottom: 1px solid #e9e0c9;
        color: var(--dark);
        font-size: 14px;
        white-space: normal;

        opacity: 0;
        transform: translateX(12px);

        transition:
            opacity .25s ease,
            transform .25s ease,
            background .2s ease,
            color .2s ease;
    }

    .nav-links.open a {
        opacity: 1;
        transform: translateX(0);
    }

    .nav-links.open a:nth-child(1) {
        transition-delay: .04s;
    }

    .nav-links.open a:nth-child(2) {
        transition-delay: .08s;
    }

    .nav-links.open a:nth-child(3) {
        transition-delay: .12s;
    }

    .nav-links.open a:nth-child(4) {
        transition-delay: .16s;
    }

    .nav-links.open a:nth-child(5) {
        transition-delay: .20s;
    }

    .nav-links.open a:nth-child(6) {
        transition-delay: .24s;
    }

    .nav-links a:not(.nav-register)::after {
        display: none;
    }

    .nav-links a.active,
    .nav-links a:hover {
        padding-left: 17px;
        background: var(--pale);
        color: var(--blue);
    }

    .nav-links .nav-register {
        margin-top: 15px;
        padding: 13px;
        border-radius: 4px;
        background: var(--blue);
        color: var(--white);
        text-align: center;
    }

    .nav-links .nav-register:hover,
    .nav-links .nav-register.active {
        background: var(--dark);
        color: var(--white);
    }

    /*
       Backdrop berada di bawah header dan panel menu.
       Area di luar panel dapat diklik untuk menutup menu.
    */

    .menu-backdrop {
        position: fixed;
        inset: 0;
        z-index: 1001;

        display: block;
        background: rgba(3, 28, 49, .65);

        opacity: 0;
        visibility: hidden;
        pointer-events: none;

        transition:
            opacity .3s ease,
            visibility .3s ease;
    }

    .menu-backdrop.show {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    /* Slider */

    .campus-slider {
        height: 440px;
    }

    .slide img {
        object-position: center;
    }

    .slide::after {
        background: linear-gradient(
            0deg,
            rgba(3, 31, 53, .95),
            rgba(3, 43, 71, .65) 55%,
            rgba(3, 35, 61, .08)
        );
    }

    .slide-caption {
        right: 24px;
        bottom: 70px;
        left: 24px;
        width: auto;
    }

    .slide-caption h1,
    .slide-caption h2 {
        font-size: clamp(27px, 7vw, 38px);
    }

    .slide-caption p {
        font-size: 12px;
    }

    .slide-buttons {
        gap: 8px;
        margin-top: 14px;
    }

    .slide-buttons .btn {
        padding: 10px 12px;
        font-size: 10px;
    }

    .slider-arrow {
        top: 35%;
        width: 36px;
        height: 36px;
        font-size: 18px;
    }

    .slider-arrow.prev {
        left: 9px;
    }

    .slider-arrow.next {
        right: 9px;
    }

    /* Info acara */

    .info-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .info-item {
        padding: 12px 15px;
        border-right: 0;
        border-bottom: 1px solid rgba(255, 255, 255, .12);
    }

    .info-item:last-child {
        border-bottom: 0;
    }

    /* Konten */

    .section-space {
        padding-top: 25px;
        padding-bottom: 30px;
    }

    .home-grid,
    .registration-layout,
    .speaker-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 14px;
    }

    .content-card {
        padding: 17px;
    }

    .register-banner {
        flex-direction: column;
        align-items: stretch;
        padding: 18px;
    }

    .register-banner h2 {
        font-size: 21px;
    }

    /* Footer */

    .footer-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 17px;
    }

    .footer-grid > div {
        min-width: 0;
    }

    .program-table {
        min-width: 440px;
    }
}

/* =========================
   MOBILE KECIL
========================= */

@media (max-width: 380px) {
    .container {
        width: calc(100% - 20px);
    }

    .brand-name {
        font-size: 17px;
    }

    .brand-name small {
        max-width: 185px;
        font-size: 5.5px;
    }

    .menu-toggle {
        width: 39px;
        height: 39px;
        flex-basis: 39px;
    }

    .nav-links {
        width: min(88vw, 330px);
        padding-right: 17px;
        padding-left: 17px;
    }

    .campus-slider {
        height: 420px;
    }

    .slide-caption {
        right: 20px;
        left: 20px;
    }

    .slide-caption h1,
    .slide-caption h2 {
        font-size: 26px;
    }

    .slide-buttons {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
    }

    .content-card {
        padding: 15px;
    }

    .register-banner {
        padding: 15px;
    }
}

/* =========================
   AKSESIBILITAS
========================= */

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--sky);
    outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
        scroll-behavior: auto !important;
    }
}







.nav-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 10px 13px;
    border: 1px solid var(--blue, #08639b);
    border-radius: 8px;
    color: var(--blue, #08639b);
    font-size: 13px;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.nav-download:hover {
    background: var(--pale, #edf7fc);
    color: var(--dark, #063453);
}

@media (max-width: 768px) {
    .nav-download {
        width: 100%;
        box-sizing: border-box;
        justify-content: center;
        padding: 12px;
    }
}




/* =========================================
   ORAL PRESENTATION GUIDELINES
   DELI ICAS 2027
========================================= */

.oral-guidelines-section {
    max-width: 1160px;
    margin: 56px auto;
    padding: 0 20px;
    color: #26394b;
    font-family: inherit;
    scroll-margin-top: 100px;
}

.oral-guidelines-card {
    overflow: hidden;
    background: #ffffff;
    border: 1px solid #e2eaf1;
    border-radius: 22px;
    box-shadow: 0 16px 45px rgba(4, 40, 68, 0.09);
}

/* Header */
.oral-guidelines-header {
    position: relative;
    overflow: hidden;
    padding: 38px 36px;
    color: #ffffff;
    background:
        radial-gradient(circle at 90% 0%, rgba(226, 183, 53, 0.20), transparent 32%),
        linear-gradient(125deg, #042844 0%, #064c76 60%, #0877a8 100%);
    border-bottom: 5px solid #e2b735;
}

.oral-guidelines-header::after {
    content: "";
    position: absolute;
    right: -55px;
    bottom: -110px;
    width: 260px;
    height: 260px;
    border: 35px solid rgba(255, 255, 255, 0.06);
    border-radius: 50%;
    pointer-events: none;
}

.oral-guidelines-header-content {
    position: relative;
    z-index: 1;
    max-width: 850px;
}

.oral-guidelines-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 13px;
    color: #ffe58c;
    background: rgba(255, 255, 255, 0.10);
    border: 1px solid rgba(255, 229, 140, 0.35);
    border-radius: 30px;
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.oral-guidelines-header h2 {
    margin: 20px 0 12px;
    color: #ffffff;
    font-size: clamp(1.8rem, 4vw, 2.7rem);
    font-weight: 800;
    line-height: 1.2;
}

.oral-guidelines-header h2 span {
    color: #f3d36a;
}

.oral-guidelines-header p {
    max-width: 760px;
    margin: 0;
    color: #e5f1fa;
    font-size: 0.98rem;
    line-height: 1.85;
}

.oral-guidelines-theme {
    margin-top: 22px;
    padding: 16px 18px;
    color: #ffffff;
    background: rgba(255, 255, 255, 0.08);
    border-left: 4px solid #e2b735;
    border-radius: 0 10px 10px 0;
    line-height: 1.7;
}

.oral-guidelines-theme strong {
    display: block;
    margin-bottom: 4px;
    color: #f3d36a;
    font-size: 0.76rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.oral-guidelines-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 25px;
}

.oral-guidelines-actions .oral-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    min-height: 46px;
    padding: 12px 20px;
    border: 1px solid transparent;
    border-radius: 9px;
    font-size: 0.88rem;
    font-weight: 750;
    text-align: center;
    text-decoration: none;
    transition: transform .2s ease, box-shadow .2s ease,
                background .2s ease;
}

.oral-guidelines-actions .oral-btn:hover {
    transform: translateY(-2px);
}

.oral-btn-gold {
    color: #172b3c;
    background: #f1ce62;
    box-shadow: 0 6px 18px rgba(226, 183, 53, 0.18);
}

.oral-btn-gold:hover {
    color: #172b3c;
    background: #ffdc70;
    box-shadow: 0 9px 22px rgba(226, 183, 53, 0.25);
}

.oral-btn-outline {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.5) !important;
}

.oral-btn-outline:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.14);
}

/* Ringkasan konferensi */
.oral-guidelines-body {
    padding: 30px 32px 34px;
}

.oral-overview-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 32px;
}

.oral-overview-item {
    display: flex;
    align-items: flex-start;
    gap: 13px;
    min-width: 0;
    padding: 18px;
    background: #f5f9fc;
    border: 1px solid #e2ebf2;
    border-radius: 13px;
}

.oral-overview-icon {
    display: flex;
    flex: 0 0 43px;
    align-items: center;
    justify-content: center;
    width: 43px;
    height: 43px;
    color: #ffffff;
    background: #06476e;
    border-radius: 11px;
    font-size: 1.1rem;
}

.oral-overview-item span {
    display: block;
    margin-bottom: 5px;
    color: #718196;
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .5px;
}

.oral-overview-item strong {
    display: block;
    color: #12344c;
    font-size: 0.93rem;
    line-height: 1.55;
    overflow-wrap: anywhere;
}

/* Judul section */
.oral-section-title {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin: 32px 0 16px;
}

.oral-section-title:first-child {
    margin-top: 0;
}

.oral-section-number {
    display: flex;
    flex: 0 0 34px;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    color: #ffffff;
    background: #075078;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 800;
}

.oral-section-title h3 {
    margin: 2px 0 5px;
    color: #073653;
    font-size: 1.12rem;
    font-weight: 800;
}

.oral-section-title p {
    margin: 0;
    color: #718196;
    font-size: 0.9rem;
    line-height: 1.65;
}

.oral-guidelines-body p,
.oral-guidelines-body li {
    line-height: 1.8;
}

.oral-guidelines-body > p {
    margin: 10px 0;
}

.oral-guidelines-body ul,
.oral-guidelines-body ol {
    padding-left: 24px;
}

.oral-guidelines-body li {
    margin: 7px 0;
}

.oral-guidelines-body a:not(.oral-btn) {
    color: #0872a5;
    font-weight: 650;
    overflow-wrap: anywhere;
}

/* Grid konten */
.oral-content-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin-top: 16px;
}

.oral-content-box {
    min-width: 0;
    padding: 22px;
    background: #f7fafc;
    border: 1px solid #e2eaf1;
    border-radius: 14px;
}

.oral-content-box h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 15px;
    color: #073653;
    font-size: 1rem;
    font-weight: 800;
}

.oral-content-box h4 i {
    color: #0877a8;
    font-size: 1.1rem;
}

.oral-content-box ul,
.oral-content-box ol {
    margin-bottom: 0;
}

.oral-content-box li {
    font-size: 0.92rem;
}

/* Topik penelitian */
.oral-topic-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 15px;
}

.oral-topic-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 13px;
    color: #29465b;
    background: #ffffff;
    border: 1px solid #e1eaf1;
    border-radius: 10px;
    font-size: 0.88rem;
    line-height: 1.6;
}

.oral-topic-item i {
    margin-top: 4px;
    color: #0a83a9;
}

/* Highlight tenggat */
.oral-highlight {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-top: 20px;
    padding: 18px;
    color: #654c08;
    background: #fff9e8;
    border: 1px solid #f0df9d;
    border-left: 5px solid #e2b735;
    border-radius: 11px;
}

.oral-highlight > i {
    margin-top: 3px;
    color: #b8870b;
    font-size: 1.3rem;
}

.oral-highlight strong {
    display: block;
    margin-bottom: 4px;
}

.oral-highlight p {
    margin: 0;
    line-height: 1.7;
}

/* Durasi presentasi */
.oral-duration-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 16px;
}

.oral-duration-card {
    padding: 22px;
    background: #f3f8fc;
    border: 1px solid #deebf4;
    border-radius: 14px;
}

.oral-duration-card.qa {
    background: #fff9e8;
    border-color: #f0df9d;
}

.oral-duration-card span {
    display: block;
    margin-bottom: 7px;
    color: #63798d;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: .7px;
    text-transform: uppercase;
}

.oral-duration-card strong {
    display: block;
    color: #06476e;
    font-size: 2.1rem;
    font-weight: 850;
    line-height: 1.2;
}

.oral-duration-card.qa strong {
    color: #8a6710;
}

.oral-duration-card p {
    margin: 8px 0 0;
    color: #586d80;
    font-size: 0.9rem;
}

/* Biaya */
.oral-fee-box {
    margin-top: 22px;
    padding: 25px;
    color: #ffffff;
    background: linear-gradient(125deg, #073653, #075d86);
    border-radius: 15px;
}

.oral-fee-label {
    color: #f3d36a;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.oral-fee-amount {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 10px 15px;
    margin: 9px 0;
}

.oral-fee-amount strong {
    color: #ffffff;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 850;
}

.oral-fee-amount span {
    color: #f3d36a;
    font-size: 1.05rem;
    font-weight: 750;
}

.oral-fee-box > p {
    margin: 0;
    color: #e3eff7;
    font-size: 0.91rem;
}

.oral-bank-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 20px;
}

.oral-bank-item {
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
}

.oral-bank-item span {
    display: block;
    margin-bottom: 5px;
    color: #c4dce9;
    font-size: 0.76rem;
}

.oral-bank-item strong {
    display: block;
    color: #ffffff;
    font-size: 0.94rem;
    overflow-wrap: anywhere;
}

/* Footer */
.oral-guidelines-footer {
    margin-top: 26px;
    padding: 18px;
    color: #4a6174;
    background: #f5f9fc;
    border: 1px solid #e1eaf1;
    border-radius: 12px;
    font-size: 0.9rem;
    line-height: 1.8;
}

.oral-guidelines-footer strong {
    color: #073653;
}

/* Responsif */
@media (max-width: 900px) {
    .oral-overview-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .oral-content-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .oral-guidelines-section {
        margin: 36px auto;
        padding: 0 14px;
    }

    .oral-guidelines-header {
        padding: 27px 20px;
    }

    .oral-guidelines-header h2 {
        font-size: 1.8rem;
    }

    .oral-guidelines-body {
        padding: 23px 17px;
    }

    .oral-overview-grid,
    .oral-topic-list,
    .oral-duration-grid,
    .oral-bank-grid {
        grid-template-columns: 1fr;
    }

    .oral-overview-item {
        padding: 15px;
    }

    .oral-content-box {
        padding: 18px;
    }

    .oral-guidelines-actions {
        flex-direction: column;
    }

    .oral-guidelines-actions .oral-btn {
        width: 100%;
    }

    .oral-fee-box {
        padding: 20px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .oral-guidelines-actions .oral-btn {
        transition: none;
    }
}



/* =========================================
   POSTER PRESENTATION GUIDELINES
========================================= */

.poster-guidelines-section {
    max-width: 1160px;
    margin: 56px auto;
    padding: 0 20px;
    color: #26394b;
}

.poster-guidelines-card {
    overflow: hidden;
    background: #fff;
    border: 1px solid #e2eaf1;
    border-radius: 22px;
    box-shadow: 0 16px 45px rgba(4, 40, 68, .09);
}

.poster-guidelines-header {
    position: relative;
    overflow: hidden;
    padding: 38px 36px;
    color: #fff;
    background:
        radial-gradient(circle at 90% 0%, rgba(226,183,53,.20), transparent 32%),
        linear-gradient(125deg, #042844, #064c76 60%, #0877a8);
    border-bottom: 5px solid #e2b735;
}

.poster-guidelines-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 13px;
    color: #ffe58c;
    background: rgba(255,255,255,.10);
    border: 1px solid rgba(255,229,140,.35);
    border-radius: 30px;
    font-size: .76rem;
    font-weight: 800;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.poster-guidelines-header h2 {
    margin: 20px 0 12px;
    color: #fff;
    font-size: clamp(1.8rem, 4vw, 2.7rem);
    font-weight: 800;
    line-height: 1.2;
}

.poster-guidelines-header p {
    max-width: 760px;
    margin: 0;
    color: #e5f1fa;
    font-size: .98rem;
    line-height: 1.85;
}

.poster-guidelines-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 25px;
}

.poster-guidelines-actions a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    min-height: 46px;
    padding: 12px 20px;
    border: 1px solid transparent;
    border-radius: 9px;
    font-size: .88rem;
    font-weight: 750;
    text-decoration: none;
    transition: transform .2s ease, box-shadow .2s ease;
}

.poster-guidelines-actions a:hover {
    transform: translateY(-2px);
}

.poster-btn-gold {
    color: #172b3c;
    background: #f1ce62;
}

.poster-btn-outline {
    color: #fff;
    background: rgba(255,255,255,.06);
    border-color: rgba(255,255,255,.5) !important;
}

.poster-guidelines-body {
    padding: 30px 32px 34px;
}

.poster-guidelines-body h3 {
    margin: 30px 0 14px;
    color: #073653;
    font-size: 1.12rem;
    font-weight: 800;
}

.poster-guidelines-body h3:first-child {
    margin-top: 0;
}

.poster-guidelines-body p,
.poster-guidelines-body li {
    line-height: 1.8;
}

.poster-guidelines-body ul,
.poster-guidelines-body ol {
    padding-left: 24px;
}

.poster-guidelines-body li {
    margin: 7px 0;
}

.poster-guidelines-body a:not(.poster-btn) {
    color: #0872a5;
    font-weight: 650;
    overflow-wrap: anywhere;
}

.poster-overview-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 32px;
}

.poster-overview-item {
    padding: 18px;
    background: #f5f9fc;
    border: 1px solid #e2ebf2;
    border-radius: 13px;
}

.poster-overview-item span {
    display: block;
    margin-bottom: 6px;
    color: #718196;
    font-size: .76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .5px;
}

.poster-overview-item strong {
    display: block;
    color: #12344c;
    font-size: .93rem;
    line-height: 1.6;
    overflow-wrap: anywhere;
}

.poster-section-title {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin: 32px 0 16px;
}

.poster-section-number {
    display: flex;
    flex: 0 0 34px;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    color: #fff;
    background: #075078;
    border-radius: 10px;
    font-size: .9rem;
    font-weight: 800;
}

.poster-section-title h3 {
    margin: 2px 0 5px;
}

.poster-section-title p {
    margin: 0;
    color: #718196;
    font-size: .9rem;
}

.poster-content-box {
    padding: 22px;
    background: #f7fafc;
    border: 1px solid #e2eaf1;
    border-radius: 14px;
}

.poster-fee-box {
    margin-top: 22px;
    padding: 25px;
    color: #fff;
    background: linear-gradient(125deg, #073653, #075d86);
    border-radius: 15px;
}

.poster-fee-box h3 {
    margin-top: 0;
    color: #f3d36a;
}

.poster-fee-box p,
.poster-fee-box li {
    color: #e3eff7;
}

.poster-fee-amount {
    margin: 10px 0;
    color: #fff;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 850;
}

.poster-bank-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 20px;
}

.poster-bank-item {
    padding: 14px 16px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.15);
    border-radius: 10px;
}

.poster-bank-item span {
    display: block;
    margin-bottom: 5px;
    color: #c4dce9;
    font-size: .76rem;
}

.poster-bank-item strong {
    display: block;
    color: #fff;
    overflow-wrap: anywhere;
}

.poster-highlight {
    margin-top: 20px;
    padding: 18px;
    color: #654c08;
    background: #fff9e8;
    border: 1px solid #f0df9d;
    border-left: 5px solid #e2b735;
    border-radius: 11px;
    line-height: 1.8;
}

@media (max-width: 900px) {
    .poster-overview-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 600px) {
    .poster-guidelines-section {
        margin: 36px auto;
        padding: 0 14px;
    }

    .poster-guidelines-header {
        padding: 27px 20px;
    }

    .poster-guidelines-body {
        padding: 23px 17px;
    }

    .poster-overview-grid,
    .poster-bank-grid {
        grid-template-columns: 1fr;
    }

    .poster-guidelines-actions {
        flex-direction: column;
    }

    .poster-guidelines-actions a {
        width: 100%;
    }

    .poster-content-box,
    .poster-fee-box {
        padding: 18px;
    }
}




/* Tombol toggle menu mobile */
.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    padding: 9px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 8px;
    background: #063453;
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    flex-shrink: 0;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    border-radius: 2px;
    background: #ffffff;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

/* Animasi menjadi tanda X saat menu terbuka */
.menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Latar belakang menu mobile */
.menu-backdrop {
    display: none;
}

/* Tampilan mobile */
@media (max-width: 992px) {
    .menu-toggle {
        display: flex;
    }

    .site-header .nav {
        position: relative;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: calc(100% + 10px);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        padding: 18px;
        background: #ffffff;
        border: 1px solid #e3eaf0;
        border-radius: 12px;
        box-shadow: 0 12px 30px rgba(4, 40, 68, 0.15);
        z-index: 1002;
        max-height: calc(100vh - 100px);
        overflow-y: auto;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links .nav-link,
    .nav-links .nav-download,
    .nav-links .nav-register,
    .nav-links .nav-login {
        display: flex;
        align-items: center;
        padding: 12px 14px;
        border-radius: 7px;
        text-decoration: none;
    }

    .nav-links .nav-link {
        color: #063453;
    }

    .nav-links .nav-link:hover {
        background: #f0f6fa;
    }

    .nav-links .nav-download,
    .nav-links .nav-register,
    .nav-links .nav-login {
        justify-content: center;
    }

    .menu-backdrop.active {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(4, 25, 42, 0.35);
        z-index: 999;
    }
}

/* Kurangi animasi jika diminta oleh pengaturan perangkat */
@media (prefers-reduced-motion: reduce) {
    .menu-toggle span {
        transition: none;
    }
}