/* ==========================================================================
   03 — LAYOUT
   Kerangka halaman: container, spacing section, background ambient,
   header, drawer, footer, tombol back-to-top.
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--kn-container);
    margin-inline: auto;
    padding-inline: var(--kn-gutter);
}

.site-main {
    position: relative;
    z-index: var(--kn-z-content);
}

/* Satu-satunya sumber padding vertikal antar section, supaya tidak
   ada selector lain yang saling menimpa. */
.section {
    position: relative;
    padding-block: var(--kn-section-y);
}

.section--features { padding-block-start: 0; }
.section--cta { padding-block-end: calc(var(--kn-section-y) * 0.8); }

/* ==========================================================================
   BACKDROP — aurora blobs
   ========================================================================== */

.kn-backdrop {
    position: fixed;
    inset: 0;
    z-index: var(--kn-z-backdrop);
    overflow: hidden;
    pointer-events: none;
    background:
        radial-gradient(120% 90% at 50% -10%, var(--kn-bg-soft) 0%, transparent 55%),
        linear-gradient(180deg, #f3f6ff 0%, var(--kn-bg) 45%, #e9eefb 100%);
}

.kn-blob {
    position: absolute;
    display: block;
    border-radius: 50%;
    filter: blur(70px);
    opacity: 0.5;
    will-change: transform;
}

.kn-blob--1 {
    top: -14vh; right: -8vw;
    width: 46vw; height: 46vw;
    background: radial-gradient(circle at 35% 35%, rgba(120, 190, 255, 0.85), rgba(120, 190, 255, 0) 68%);
}

.kn-blob--2 {
    top: 24vh; left: -14vw;
    width: 40vw; height: 40vw;
    background: radial-gradient(circle at 60% 40%, rgba(196, 176, 255, 0.7), rgba(196, 176, 255, 0) 68%);
}

.kn-blob--3 {
    bottom: 6vh; right: -10vw;
    width: 42vw; height: 42vw;
    background: radial-gradient(circle at 40% 60%, rgba(255, 190, 226, 0.55), rgba(255, 190, 226, 0) 66%);
}

.kn-blob--4 {
    bottom: 30vh; left: 18vw;
    width: 30vw; height: 30vw;
    background: radial-gradient(circle at 50% 50%, rgba(150, 236, 255, 0.55), rgba(150, 236, 255, 0) 66%);
}

/* Garis grid halus supaya latar tidak terasa "kosong". */
.kn-grid-lines {
    position: absolute;
    inset: 0;
    opacity: 0.35;
    background-image:
        linear-gradient(to right, rgba(20, 60, 130, 0.045) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(20, 60, 130, 0.045) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: radial-gradient(120% 80% at 50% 0%, #000 20%, transparent 75%);
    -webkit-mask-image: radial-gradient(120% 80% at 50% 0%, #000 20%, transparent 75%);
}

/* ==========================================================================
   SCROLL PROGRESS
   ========================================================================== */

.kn-scroll-progress {
    position: fixed;
    inset-block-start: 0;
    inset-inline: 0;
    z-index: calc(var(--kn-z-header) + 5);
    height: 2px;
    pointer-events: none;
}

.kn-scroll-progress__bar {
    display: block;
    height: 100%;
    width: 100%;
    background: var(--kn-grad-text);
    transform: scaleX(0);
    transform-origin: 0 50%;
}

/* ==========================================================================
   HEADER
   ========================================================================== */

.site-header {
    position: sticky;
    inset-block-start: 0;
    z-index: var(--kn-z-header);
    padding-block: 14px;
    transition: padding var(--kn-dur) var(--kn-ease), background-color var(--kn-dur) var(--kn-ease),
                box-shadow var(--kn-dur) var(--kn-ease), backdrop-filter var(--kn-dur) var(--kn-ease);
}

.site-header::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: rgba(255, 255, 255, 0.62);
    border-block-end: 1px solid rgba(255, 255, 255, 0.7);
    box-shadow: 0 10px 30px -22px rgba(16, 42, 92, 0.4);
    backdrop-filter: blur(var(--kn-glass-blur)) saturate(var(--kn-glass-sat));
    -webkit-backdrop-filter: blur(var(--kn-glass-blur)) saturate(var(--kn-glass-sat));
    opacity: 0;
    transition: opacity var(--kn-dur) var(--kn-ease);
}

.site-header.is-stuck { padding-block: 9px; }
.site-header.is-stuck::after { opacity: 1; }

.site-header__inner {
    display: flex;
    align-items: center;
    gap: var(--kn-space-5);
}

.site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--kn-space-3);
    margin-inline-start: auto;
}

/* ------------------------------------------------------------------ logo */
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--kn-navy-800);
    transition: transform var(--kn-dur) var(--kn-ease);
}

.logo:hover { transform: translateY(-1px); }

.logo__mark {
    width: 44px;
    height: 44px;
    object-fit: contain;
    filter: drop-shadow(0 6px 12px rgba(14, 90, 216, 0.28));
    transition: transform var(--kn-dur-slow) var(--kn-ease-spring);
}

.logo:hover .logo__mark { transform: rotate(-8deg) scale(1.06); }

.logo__type {
    display: flex;
    flex-direction: column;
    line-height: 1.05;
}

.logo__name {
    font-family: var(--kn-font-display);
    font-size: 1.0625rem;
    font-weight: 800;
    letter-spacing: 0.01em;
    text-transform: uppercase;
    color: var(--kn-navy-800);
}

.logo__tag {
    font-size: var(--kn-fs-2xs);
    font-weight: 500;
    letter-spacing: var(--kn-ls-wide);
    text-transform: uppercase;
    color: var(--kn-blue-500);
}

.logo--light .logo__name,
.logo--light .logo__tag { color: var(--kn-white); }

/* -------------------------------------------------------------- nav list */
.nav {
    position: relative;
    display: none;
}

@media (min-width: 1000px) {
    .nav { display: block; }
}

.nav__list {
    display: flex;
    align-items: center;
    gap: clamp(14px, 2vw, 30px);
}

.nav__link {
    position: relative;
    display: inline-block;
    padding-block: 6px;
    color: var(--kn-ink-500);
    font-size: var(--kn-fs-xs);
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    white-space: nowrap;
}

.nav__link:hover { color: var(--kn-navy-800); }

.nav__link.is-active {
    color: var(--kn-blue-600);
    font-weight: 600;
}

/* Indikator garis yang meluncur ke link aktif (diposisikan oleh kn-nav.js). */
.nav__indicator {
    position: absolute;
    inset-block-end: -2px;
    inset-inline-start: 0;
    height: 2px;
    width: 0;
    border-radius: var(--kn-r-pill);
    background: var(--kn-grad-brand);
    opacity: 0;
    transition: transform var(--kn-dur) var(--kn-ease-out),
                width var(--kn-dur) var(--kn-ease-out),
                opacity var(--kn-dur) var(--kn-ease);
}

.nav__indicator.is-visible { opacity: 1; }

/* ----------------------------------------------------------- nav toggle */
.nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    padding: 11px;
    border: 1px solid var(--kn-glass-border);
    border-radius: var(--kn-r-sm);
    background: var(--kn-glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

@media (min-width: 1000px) {
    .nav-toggle { display: none; }
}

.nav-toggle__bar {
    display: block;
    height: 2px;
    width: 100%;
    border-radius: 2px;
    background: var(--kn-navy-800);
    transition: transform var(--kn-dur) var(--kn-ease), opacity var(--kn-dur-fast) var(--kn-ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   DRAWER (mobile)
   ========================================================================== */

.drawer {
    position: fixed;
    inset: 0;
    z-index: var(--kn-z-drawer);
    display: grid;
}

.drawer[hidden] { display: none; }

.drawer__scrim {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: rgba(10, 31, 71, 0.35);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    opacity: 0;
    transition: opacity var(--kn-dur) var(--kn-ease);
    cursor: default;
}

.drawer__panel {
    position: relative;
    z-index: 2;
    inset-inline-end: 0;
    margin-inline-start: auto;
    width: min(360px, 88vw);
    height: 100%;
    padding: 22px 22px max(32px, env(safe-area-inset-bottom));
    padding-inline-end: max(22px, env(safe-area-inset-right));
    display: flex;
    flex-direction: column;
    gap: var(--kn-space-5);
    border-radius: var(--kn-r-xl) 0 0 var(--kn-r-xl);
    transform: translateX(102%);
    transition: transform var(--kn-dur-slow) var(--kn-ease-out),
                opacity var(--kn-dur) var(--kn-ease);

    /* Panel harus bisa di-scroll sendiri: di phone landscape (tinggi ~375px)
       6 item menu + logo + tombol tidak muat. overscroll-behavior mencegah
       scroll "menembus" ke halaman di belakangnya. */
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
}

.drawer.is-open .drawer__scrim { opacity: 1; }
.drawer.is-open .drawer__panel { transform: translateX(0); }

.drawer__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--kn-space-4);
}

.drawer__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px; height: 38px;
    border-radius: var(--kn-r-sm);
    background: rgba(255, 255, 255, 0.6);
    color: var(--kn-navy-800);
    transition: background-color var(--kn-dur-fast) var(--kn-ease);
}

.drawer__close:hover { background: var(--kn-white); }

.drawer__nav { flex: 1; }

.drawer__nav ul {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.drawer__nav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 14px;
    border-radius: var(--kn-r-sm);
    color: var(--kn-navy-800);
    font-family: var(--kn-font-display);
    font-size: var(--kn-fs-sm);
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: background-color var(--kn-dur-fast) var(--kn-ease),
                color var(--kn-dur-fast) var(--kn-ease),
                transform var(--kn-dur-fast) var(--kn-ease);
}

.drawer__nav a .icon {
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity var(--kn-dur-fast) var(--kn-ease), transform var(--kn-dur-fast) var(--kn-ease);
}

.drawer__nav a:hover {
    background: rgba(26, 123, 240, 0.09);
    color: var(--kn-blue-600);
}

.drawer__nav a:hover .icon { opacity: 1; transform: translateX(0); }

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

.site-footer {
    position: relative;
    z-index: var(--kn-z-content);
    padding-block: clamp(2.5rem, 4vw, 3.5rem) 1.25rem;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.44), rgba(255, 255, 255, 0.72));
    border-block-start: 1px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(var(--kn-glass-blur));
    -webkit-backdrop-filter: blur(var(--kn-glass-blur));
}

.site-footer__grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(2, 1fr) 1.2fr 0.8fr;
    gap: clamp(1.5rem, 3vw, 2.5rem);
    align-items: start;
}

.site-footer__about {
    margin-block-start: 14px;
    max-width: 22ch;
    color: var(--kn-ink-500);
    font-size: var(--kn-fs-xs);
    line-height: 1.75;
}

.site-footer__title {
    margin-block-end: 14px;
    color: var(--kn-navy-800);
    font-size: var(--kn-fs-2xs);
    font-weight: 700;
    letter-spacing: var(--kn-ls-wide);
    text-transform: uppercase;
}

.site-footer__links {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.site-footer__links a {
    color: var(--kn-ink-500);
    font-size: var(--kn-fs-xs);
}

.site-footer__links a:hover {
    color: var(--kn-blue-600);
    padding-inline-start: 4px;
}

.site-footer__links a { transition: color var(--kn-dur-fast) var(--kn-ease), padding var(--kn-dur-fast) var(--kn-ease); }

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.contact-list__item {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: var(--kn-fs-xs);
}

.contact-list__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px; height: 22px;
    flex: none;
    border-radius: 50%;
    background: rgba(26, 123, 240, 0.12);
    color: var(--kn-blue-600);
}

.contact-list__item a { color: var(--kn-ink-500); }
.contact-list__item a:hover { color: var(--kn-blue-600); }

.social {
    display: flex;
    gap: 9px;
}

.social__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px; height: 34px;
    border: 1px solid rgba(26, 123, 240, 0.28);
    border-radius: 50%;
    color: var(--kn-blue-600);
    background: rgba(255, 255, 255, 0.5);
    transition: transform var(--kn-dur) var(--kn-ease-spring),
                background var(--kn-dur) var(--kn-ease),
                color var(--kn-dur) var(--kn-ease),
                box-shadow var(--kn-dur) var(--kn-ease);
}

.social__link:hover {
    transform: translateY(-3px);
    background: var(--kn-grad-brand);
    border-color: transparent;
    color: var(--kn-white);
    box-shadow: var(--kn-shadow-blue);
}

.site-footer__bottom {
    margin-block-start: clamp(1.75rem, 3vw, 2.5rem);
    padding-block-start: 16px;
    border-block-start: 1px solid rgba(20, 60, 130, 0.08);
    text-align: center;
}

.site-footer__bottom p {
    color: var(--kn-ink-400);
    font-size: var(--kn-fs-2xs);
    letter-spacing: 0.02em;
}

/* ==========================================================================
   BACK TO TOP
   ========================================================================== */

.to-top {
    position: fixed;
    /* max() supaya tidak tertutup home indicator iPhone / gesture bar Android */
    inset-block-end: max(22px, env(safe-area-inset-bottom));
    inset-inline-end: max(22px, env(safe-area-inset-right));
    z-index: var(--kn-z-top);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: var(--kn-grad-brand);
    color: var(--kn-white);
    box-shadow: var(--kn-shadow-blue);
    opacity: 0;
    transform: translateY(14px) scale(0.9);
    pointer-events: none;
    transition: opacity var(--kn-dur) var(--kn-ease),
                transform var(--kn-dur) var(--kn-ease-spring),
                box-shadow var(--kn-dur) var(--kn-ease);
}

.to-top.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.to-top:hover { box-shadow: var(--kn-shadow-blue-h); transform: translateY(-3px); }

/* Kalau widget kontak mengambang aktif (body.has-kn-widget, lihat inc/head.php
   & assets/css/11-widget.css), geser tombol ini ke ATAS widget tsb supaya
   keduanya tidak pernah bertumpuk (58px tinggi trigger widget + 12px jarak). */
body.has-kn-widget .to-top {
    inset-block-end: calc(max(22px, env(safe-area-inset-bottom)) + 70px);
}