/* ==========================================================================
   BIRO UMUM — LAYOUT
   Kerangka halaman: kontainer, seksi, navbar, dan footer.
   ========================================================================== */

/* --------------------------------------------------------------------------
   KONTAINER
   -------------------------------------------------------------------------- */
.bu-container {
    width: 100%;
    max-width: var(--bu-container);
    margin-inline: auto;
    padding-inline: var(--bu-gutter);
}
.bu-container--wide {
    max-width: var(--bu-container-wide);
}
.bu-container--narrow {
    max-width: var(--bu-container-narrow);
}

/* --------------------------------------------------------------------------
   SEKSI
   -------------------------------------------------------------------------- */
.bu-section {
    position: relative;
    padding-block: var(--bu-space-section);
}
.bu-section--tight {
    padding-block: calc(var(--bu-space-section) * 0.62);
}
.bu-section--alt {
    background: var(--bu-bg-2);
}
.bu-section--ink {
    background: var(--bu-ink);
    color: var(--bu-text-inv);
    overflow: hidden;
}
.bu-section--edge-top {
    border-top: var(--bu-border);
}

/* Ruang di bawah navbar untuk halaman tanpa hero */
.bu-shell {
    padding-top: calc(var(--bu-nav-h) + clamp(1.5rem, 4vw, 3rem));
}
.bu-shell--flush {
    padding-top: 0;
}
@media (max-width: 900px) {
    .bu-shell {
        padding-top: calc(var(--bu-nav-h-sm) + 1.5rem);
    }
}

/* Judul seksi standar */
.bu-section-head {
    max-width: 760px;
    margin-bottom: clamp(2rem, 4vw, 3.4rem);
}
.bu-section-head--center {
    margin-inline: auto;
    text-align: center;
}
.bu-section-head .bu-h2 {
    margin-bottom: 0.6rem;
}
.bu-section-head .bu-lead {
    margin-bottom: 0;
}

/* ==========================================================================
   NAVBAR
   ========================================================================== */
.bu-nav {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    height: var(--bu-nav-h);
    display: flex;
    align-items: center;
    transition:
        background-color var(--bu-dur) var(--bu-ease),
        box-shadow var(--bu-dur) var(--bu-ease),
        height var(--bu-dur) var(--bu-ease),
        border-color var(--bu-dur) var(--bu-ease);
    border-bottom: 1px solid transparent;
}

/* Mode solid (halaman tanpa hero) */
.bu-nav--solid {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom-color: var(--bu-line);
    box-shadow: var(--bu-shadow-xs);
}

/* Mode overlay (menumpang di atas hero, transparan) */
.bu-nav--overlay {
    background: linear-gradient(
        180deg,
        rgba(var(--bu-ink-rgb), 0.55) 0%,
        rgba(var(--bu-ink-rgb), 0) 100%
    );
}
.bu-nav--overlay.is-stuck {
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom-color: var(--bu-line);
    box-shadow: var(--bu-shadow-sm);
    height: 68px;
}

.bu-nav__inner {
    width: 100%;
    max-width: var(--bu-container-wide);
    margin-inline: auto;
    padding-inline: var(--bu-gutter);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
}

/* -- Merek / logo -- */
.bu-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none;
    min-width: 0;
}
.bu-brand__logo {
    width: 46px;
    height: 46px;
    object-fit: contain;
    flex: none;
    filter: drop-shadow(0 3px 8px rgba(0, 0, 0, 0.28));
    transition: transform var(--bu-dur) var(--bu-ease);
}
.bu-brand:hover .bu-brand__logo {
    transform: scale(1.05);
}
.bu-brand__text {
    display: flex;
    flex-direction: column;
    min-width: 0;
    line-height: 1.05;
}
.bu-brand__kicker {
    font-size: 0.62rem;
    font-weight: var(--bu-fw-bold);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    opacity: 0.82;
    white-space: nowrap;
}
.bu-brand__name {
    font-family: var(--bu-font-display);
    font-size: 1.16rem;
    font-weight: var(--bu-fw-bold);
    letter-spacing: 0.01em;
    white-space: nowrap;
}

/* Warna merek menyesuaikan mode navbar */
.bu-nav--solid .bu-brand,
.bu-nav.is-stuck .bu-brand {
    color: var(--bu-text);
}
.bu-nav--solid .bu-brand__kicker,
.bu-nav.is-stuck .bu-brand__kicker {
    color: var(--bu-brand);
}
.bu-nav--overlay:not(.is-stuck) .bu-brand {
    color: #fff;
}
.bu-nav--overlay:not(.is-stuck) .bu-brand__kicker {
    color: var(--bu-gold-light);
}
.bu-nav--overlay:not(.is-stuck) .bu-brand__logo {
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.45));
}

/* -- Menu desktop -- */
.bu-nav__menu {
    display: flex;
    align-items: center;
    gap: clamp(0.35rem, 1.4vw, 1.5rem);
}
.bu-nav__link {
    position: relative;
    padding: 0.55rem 0.15rem;
    font-size: 0.97rem;
    font-weight: var(--bu-fw-semibold);
    text-decoration: none;
    white-space: nowrap;
    transition: color var(--bu-dur-fast) var(--bu-ease);
}
/* Penanda tautan yang membuka tab baru */
.bu-nav__ext {
    margin-left: 0.35rem;
    font-size: 0.62em;
    opacity: 0.65;
    vertical-align: 1px;
}
.bu-nav__link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: var(--bu-gold);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--bu-dur) var(--bu-ease);
}
.bu-nav__link:hover::after,
.bu-nav__link.is-active::after {
    transform: scaleX(1);
}

.bu-nav--solid .bu-nav__link,
.bu-nav.is-stuck .bu-nav__link {
    color: var(--bu-text);
}
.bu-nav--solid .bu-nav__link:hover,
.bu-nav--solid .bu-nav__link.is-active,
.bu-nav.is-stuck .bu-nav__link:hover,
.bu-nav.is-stuck .bu-nav__link.is-active {
    color: var(--bu-brand);
}
.bu-nav--overlay:not(.is-stuck) .bu-nav__link {
    color: rgba(255, 255, 255, 0.94);
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.45);
}
.bu-nav--overlay:not(.is-stuck) .bu-nav__link:hover,
.bu-nav--overlay:not(.is-stuck) .bu-nav__link.is-active {
    color: #fff;
}

.bu-nav__actions {
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

/* Pemisah vertikal tipis */
.bu-nav__divider {
    width: 1px;
    height: 26px;
    background: currentColor;
    opacity: 0.22;
}

/* -- Tombol hamburger -- */
.bu-burger {
    display: none;
    width: 46px;
    height: 46px;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: var(--bu-radius-sm);
    background: transparent;
    cursor: pointer;
    color: inherit;
}
.bu-burger span {
    position: relative;
    display: block;
    width: 22px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
    transition: transform var(--bu-dur) var(--bu-ease),
        opacity var(--bu-dur-fast) var(--bu-ease);
}
.bu-burger span::before,
.bu-burger span::after {
    content: "";
    position: absolute;
    left: 0;
    width: 22px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
    transition: transform var(--bu-dur) var(--bu-ease);
}
.bu-burger span::before {
    top: -7px;
}
.bu-burger span::after {
    top: 7px;
}
.bu-nav--solid .bu-burger,
.bu-nav.is-stuck .bu-burger {
    color: var(--bu-text);
}
.bu-nav--overlay:not(.is-stuck) .bu-burger {
    color: #fff;
}

/* -- Menu pengguna (dropdown) -- */
.bu-usermenu {
    position: relative;
}
.bu-usermenu__trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.45rem 0.9rem 0.45rem 0.45rem;
    border: 1px solid currentColor;
    border-radius: var(--bu-radius-pill);
    background: transparent;
    font: inherit;
    font-size: 0.92rem;
    font-weight: var(--bu-fw-semibold);
    color: inherit;
    cursor: pointer;
    max-width: 230px;
    transition: background-color var(--bu-dur-fast) var(--bu-ease);
}
.bu-nav--solid .bu-usermenu__trigger,
.bu-nav.is-stuck .bu-usermenu__trigger {
    color: var(--bu-text);
    border-color: var(--bu-line-strong);
}
.bu-nav--overlay:not(.is-stuck) .bu-usermenu__trigger {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.45);
}
.bu-usermenu__trigger:hover {
    background: rgba(var(--bu-brand-rgb), 0.1);
}
.bu-usermenu__avatar {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    flex: none;
    border-radius: 50%;
    background: var(--bu-grad-brand);
    color: #fff;
    font-size: 0.78rem;
    font-weight: var(--bu-fw-bold);
    letter-spacing: 0;
}
.bu-usermenu__name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.bu-usermenu__panel {
    position: absolute;
    right: 0;
    top: calc(100% + 12px);
    min-width: 232px;
    padding: 0.5rem;
    background: #fff;
    border: var(--bu-border);
    border-radius: var(--bu-radius);
    box-shadow: var(--bu-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition:
        opacity var(--bu-dur) var(--bu-ease),
        transform var(--bu-dur) var(--bu-ease),
        visibility var(--bu-dur);
}
.bu-usermenu.is-open .bu-usermenu__panel {
    opacity: 1;
    visibility: visible;
    transform: none;
}
.bu-usermenu__head {
    padding: 0.6rem 0.8rem 0.75rem;
    border-bottom: var(--bu-border);
    margin-bottom: 0.4rem;
}
.bu-usermenu__head strong {
    display: block;
    font-size: 0.95rem;
    color: var(--bu-text);
}
.bu-usermenu__head span {
    font-size: var(--bu-fs-xs);
    color: var(--bu-text-3);
}
.bu-usermenu__item {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    width: 100%;
    padding: 0.65rem 0.8rem;
    border: 0;
    border-radius: var(--bu-radius-sm);
    background: transparent;
    font: inherit;
    font-size: 0.93rem;
    font-weight: var(--bu-fw-medium);
    color: var(--bu-text);
    text-align: left;
    text-decoration: none;
    cursor: pointer;
    transition: background-color var(--bu-dur-fast) var(--bu-ease);
}
.bu-usermenu__item i {
    width: 18px;
    color: var(--bu-brand);
    text-align: center;
}
.bu-usermenu__item:hover {
    background: var(--bu-brand-tint);
    color: var(--bu-text);
}
.bu-usermenu__item--danger {
    color: var(--bu-danger);
}
.bu-usermenu__item--danger i {
    color: var(--bu-danger);
}
.bu-usermenu__item--danger:hover {
    background: var(--bu-danger-tint);
    color: var(--bu-danger);
}

/* -- Panel menu mobile -- */
.bu-drawer {
    position: fixed;
    inset: 0;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    background: var(--bu-ink);
    color: #fff;
    padding: 1.25rem var(--bu-gutter) 2.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-100%);
    transition:
        transform var(--bu-dur-slow) var(--bu-ease),
        opacity var(--bu-dur) var(--bu-ease),
        visibility var(--bu-dur-slow);
    overflow-y: auto;
}
.bu-drawer.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
}
.bu-drawer::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--bu-grad-ink);
    z-index: -1;
}
.bu-drawer__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--bu-nav-h-sm);
    margin-bottom: 1.5rem;
}
.bu-drawer__close {
    width: 46px;
    height: 46px;
    display: grid;
    place-items: center;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 50%;
    background: transparent;
    color: #fff;
    font-size: 1.15rem;
    cursor: pointer;
    transition: background-color var(--bu-dur-fast) var(--bu-ease);
}
.bu-drawer__close:hover {
    background: rgba(255, 255, 255, 0.12);
}
.bu-drawer__nav {
    display: flex;
    flex-direction: column;
}
.bu-drawer__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.15rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    font-family: var(--bu-font-display);
    font-size: 1.5rem;
    font-weight: var(--bu-fw-semibold);
    color: #fff;
    text-decoration: none;
}
.bu-drawer__link i {
    font-size: 0.85rem;
    color: var(--bu-gold);
    opacity: 0.8;
}
.bu-drawer__link.is-active {
    color: var(--bu-gold-light);
}
.bu-drawer__foot {
    margin-top: auto;
    padding-top: 2rem;
    display: grid;
    gap: 0.75rem;
}
.bu-drawer__meta {
    margin-top: 1.75rem;
    font-size: var(--bu-fs-sm);
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

/* -- Titik balik responsif navbar -- */
@media (max-width: 1024px) {
    .bu-nav__menu,
    .bu-nav__actions {
        display: none;
    }
    .bu-burger {
        display: inline-flex;
    }
}
@media (max-width: 900px) {
    .bu-nav,
    .bu-nav--overlay.is-stuck {
        height: var(--bu-nav-h-sm);
    }
    .bu-brand__logo {
        width: 38px;
        height: 38px;
    }
    .bu-brand__name {
        font-size: 1rem;
    }
    .bu-brand__kicker {
        font-size: 0.56rem;
        letter-spacing: 0.16em;
    }
}
@media (max-width: 380px) {
    .bu-brand__kicker {
        display: none;
    }
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.bu-footer {
    position: relative;
    color: var(--bu-text-inv);
    background: var(--bu-ink);
    overflow: hidden;
    isolation: isolate;
}
.bu-footer__media {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center 30%;
    opacity: 0.22;
    z-index: -2;
    filter: grayscale(0.35);
}
.bu-footer::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(
        180deg,
        rgba(var(--bu-ink-rgb), 0.82) 0%,
        rgba(var(--bu-ink-rgb), 0.95) 55%,
        rgba(var(--bu-ink-rgb), 0.99) 100%
    );
}
.bu-footer__top {
    height: 3px;
    background: var(--bu-grad-gold);
    opacity: 0.85;
}
.bu-footer__body {
    padding-block: clamp(3rem, 6vw, 5rem);
}
.bu-footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
    gap: clamp(2rem, 4vw, 3.5rem);
}
.bu-footer__brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin-bottom: 1.1rem;
}
.bu-footer__brand img {
    width: 52px;
    height: 52px;
    object-fit: contain;
}
.bu-footer__brand-name {
    font-family: var(--bu-font-display);
    font-size: 1.25rem;
    font-weight: var(--bu-fw-bold);
    line-height: 1.2;
    color: #fff;
}
.bu-footer__brand-sub {
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--bu-gold-light);
    font-weight: var(--bu-fw-semibold);
}
.bu-footer p {
    color: rgba(255, 255, 255, 0.72);
    font-size: var(--bu-fs-sm);
    line-height: 1.75;
    margin: 0 0 0.65rem;
}
.bu-footer__title {
    margin: 0 0 1.15rem;
    font-size: 0.74rem;
    font-weight: var(--bu-fw-bold);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--bu-gold);
}
.bu-footer__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.6rem;
}
.bu-footer__list a {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    color: rgba(255, 255, 255, 0.82);
    text-decoration: none;
    font-size: var(--bu-fs-sm);
    transition: color var(--bu-dur-fast) var(--bu-ease),
        transform var(--bu-dur-fast) var(--bu-ease);
}
.bu-footer__list a::before {
    content: "";
    width: 12px;
    height: 1px;
    background: var(--bu-gold);
    opacity: 0.6;
    transition: width var(--bu-dur-fast) var(--bu-ease);
}
.bu-footer__list a:hover {
    color: #fff;
}
.bu-footer__list a:hover::before {
    width: 20px;
}
.bu-footer__contact {
    display: grid;
    gap: 0.9rem;
}
.bu-footer__contact-item {
    display: flex;
    gap: 0.8rem;
    align-items: flex-start;
    font-size: var(--bu-fs-sm);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    line-height: 1.65;
}
.bu-footer__contact-item i {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    flex: none;
    border-radius: 50%;
    border: 1px solid rgba(var(--bu-gold-rgb), 0.4);
    color: var(--bu-gold);
    font-size: 0.85rem;
}
.bu-footer__contact-item:hover {
    color: #fff;
}
.bu-footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding-block: 1.4rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem 1.5rem;
    align-items: center;
    justify-content: space-between;
    font-size: var(--bu-fs-xs);
    color: rgba(255, 255, 255, 0.6);
}
.bu-footer__bottom a {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
}
.bu-footer__bottom a:hover {
    color: var(--bu-gold-light);
}

@media (max-width: 980px) {
    .bu-footer__grid {
        grid-template-columns: 1fr 1fr;
    }
    .bu-footer__col--brand {
        grid-column: 1 / -1;
    }
}
@media (max-width: 560px) {
    .bu-footer__grid {
        grid-template-columns: 1fr;
    }
    .bu-footer__bottom {
        justify-content: center;
        text-align: center;
    }
}

/* --------------------------------------------------------------------------
   TOMBOL KEMBALI KE ATAS
   -------------------------------------------------------------------------- */
.bu-totop {
    position: fixed;
    right: clamp(1rem, 3vw, 2rem);
    bottom: clamp(1rem, 3vw, 2rem);
    z-index: 900;
    width: 50px;
    height: 50px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: 50%;
    background: var(--bu-brand);
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: var(--bu-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(14px);
    transition:
        opacity var(--bu-dur) var(--bu-ease),
        transform var(--bu-dur) var(--bu-ease),
        background-color var(--bu-dur-fast) var(--bu-ease),
        visibility var(--bu-dur);
}
.bu-totop.is-visible {
    opacity: 1;
    visibility: visible;
    transform: none;
}
.bu-totop:hover {
    background: var(--bu-brand-dark);
}