/*!
 * BBK - Benteng Beton Konstruksi
 * Stylesheet utama situs publik.
 * Struktur: 1) Tokens  2) Reset  3) Layout  4) Komponen  5) Section  6) Utility  7) Media
 * ------------------------------------------------------------------------------------
 * Desain: "Blueprint Industrial" - aksen biru korporat dipadukan dengan motif garis
 * ukur/blueprint teknikal (dimension lines) yang merefleksikan presisi produksi precast.
 */

/* =========================================================================
   1. DESIGN TOKENS
   ====================================================================== */
:root {
    /* Warna inti brand */
    --navy-950: #081B30;
    --navy-900: #0F4C81;
    --blue-700: #1A5FB4;
    --blue-500: #2E86DE;
    --white: #FFFFFF;
    --fog-50: #F5F7FA;
    --fog-100: #EAEEF3;
    --slate-800: #1E293B;
    --slate-600: #475569;

    /* Aksen pendukung: abu-abu "beton" & amber "blueprint annotation" */
    --steel-300: #B8C4D1;
    --steel-400: #94A3B8;
    --steel-600: #64748B;
    --amber-500: #F5A524;

    /* Semantic aliases */
    --color-bg: var(--white);
    --color-bg-alt: var(--fog-50);
    --color-text: var(--slate-800);
    --color-text-muted: var(--slate-600);
    --color-primary: var(--blue-700);
    --color-primary-dark: var(--navy-900);
    --color-primary-light: var(--blue-500);
    --color-accent: var(--amber-500);

    /* Tipografi */
    --font-display: 'Poppins', 'Segoe UI', sans-serif;
    --font-body: 'Inter', 'Segoe UI', sans-serif;

    --fs-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
    --fs-sm: clamp(0.875rem, 0.84rem + 0.18vw, 0.9375rem);
    --fs-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
    --fs-lg: clamp(1.125rem, 1.08rem + 0.25vw, 1.25rem);
    --fs-xl: clamp(1.375rem, 1.28rem + 0.5vw, 1.625rem);
    --fs-2xl: clamp(1.75rem, 1.55rem + 1vw, 2.25rem);
    --fs-3xl: clamp(2.25rem, 1.9rem + 1.75vw, 3.25rem);
    --fs-4xl: clamp(2.75rem, 2.2rem + 2.75vw, 4.5rem);

    /* Spacing scale */
    --sp-1: 0.25rem;
    --sp-2: 0.5rem;
    --sp-3: 0.75rem;
    --sp-4: 1rem;
    --sp-5: 1.5rem;
    --sp-6: 2rem;
    --sp-7: 2.5rem;
    --sp-8: 3rem;
    --sp-9: 4rem;
    --sp-10: 5rem;
    --section-pad: clamp(3.5rem, 3rem + 2.5vw, 6.5rem);

    /* Layout */
    --container-max: 1240px;
    --container-pad: clamp(1.25rem, 1rem + 2vw, 2.5rem);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-full: 999px;

    /* Efek */
    --shadow-sm: 0 2px 8px rgba(15, 76, 129, 0.08);
    --shadow-md: 0 12px 28px -8px rgba(8, 27, 48, 0.18);
    --shadow-lg: 0 24px 60px -12px rgba(8, 27, 48, 0.28);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 180ms var(--ease-out);
    --transition-med: 320ms var(--ease-out);

    --header-h: 84px;
}

/* =========================================================================
   2. RESET & BASE
   ====================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-h) + env(safe-area-inset-top, 0px));
    overflow-x: hidden;
    width: 100%;
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}
body {
    margin: 0;
    font-family: var(--font-body);
    font-size: var(--fs-base);
    line-height: 1.65;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.18;
    margin: 0 0 var(--sp-4);
    color: var(--slate-800);
    letter-spacing: -0.01em;
}
p { margin: 0 0 var(--sp-4); }
address { font-style: normal; }
input, textarea, select, button { font-family: inherit; }

/* Focus visibility (aksesibilitas) */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
    outline: 3px solid var(--blue-500);
    outline-offset: 2px;
    border-radius: 4px;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--navy-900);
    color: var(--white);
    padding: var(--sp-3) var(--sp-5);
    z-index: 999;
    border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* =========================================================================
   3. LAYOUT
   ====================================================================== */
.container {
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-pad);
}
.section { padding-block: var(--section-pad); }
.section--alt { background: var(--color-bg-alt); }
.section--dark {
    background: linear-gradient(160deg, var(--navy-950), var(--navy-900) 60%, var(--blue-700));
    color: var(--white);
}
.section--dark h2, .section--dark h3 { color: var(--white); }

.section-head {
    max-width: 720px;
    margin-bottom: var(--sp-8);
}
.section-head--center { margin-inline: auto; text-align: center; }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    font-family: var(--font-body);
    font-size: var(--fs-xs);
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--blue-700);
    margin-bottom: var(--sp-4);
}
.eyebrow::before {
    content: "";
    width: 28px;
    height: 2px;
    background: var(--amber-500);
    display: inline-block;
}
.section--dark .eyebrow { color: var(--steel-300); }
.section--dark .eyebrow::before { background: var(--amber-500); }

.section-title { font-size: var(--fs-3xl); }
.section-desc { color: var(--color-text-muted); font-size: var(--fs-lg); }
.section--dark .section-desc { color: var(--steel-300); }

.grid { display: grid; gap: var(--sp-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Signature element: garis "dimension" ala gambar teknik, dipakai sebagai
   pembatas antar section untuk menegaskan tema presisi & blueprint. */
.dimension-divider {
    position: relative;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    color: var(--steel-400);
}
.dimension-divider::before,
.dimension-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: repeating-linear-gradient(90deg, currentColor 0 6px, transparent 6px 12px);
}
.dimension-divider span {
    font-family: var(--font-body);
    font-size: var(--fs-xs);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    white-space: nowrap;
}

/* =========================================================================
   4. BUTTONS
   ====================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: var(--fs-sm);
    padding: 0.95rem 1.75rem;
    border-radius: var(--radius-full);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
}
.btn--sm { padding: 0.6rem 1.15rem; font-size: var(--fs-xs); }
.btn--primary {
    background: var(--white);
    color: var(--navy-900);
    box-shadow: var(--shadow-sm);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--outline {
    background: transparent;
    color: var(--white);
    border: 1.5px solid rgba(255,255,255,0.55);
}
.btn--outline:hover { background: rgba(255,255,255,0.12); border-color: var(--white); transform: translateY(-2px); }
.btn--solid {
    background: var(--color-primary);
    color: var(--white);
    box-shadow: var(--shadow-sm);
}
.btn--solid:hover { background: var(--navy-900); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--wa {
    background: #25D366;
    color: var(--white);
    box-shadow: 0 4px 14px rgba(37, 211, 102, 0.35);
}
.btn--wa:hover { background: #1EBE5A; transform: translateY(-2px); }
.btn--block { width: 100%; }
.btn--ghost-dark {
    background: transparent;
    color: var(--navy-900);
    border: 1.5px solid var(--steel-300);
}
.btn--ghost-dark:hover { border-color: var(--navy-900); background: var(--fog-50); }

/* =========================================================================
   5. HEADER / NAVIGASI
   ====================================================================== */
.site-header {
    position: fixed;
    inset-inline: 0;
    top: 0;
    z-index: 100;
    min-height: var(--header-h);
    padding-top: env(safe-area-inset-top, 0px);
    display: flex;
    align-items: center;
    transition: background var(--transition-med), box-shadow var(--transition-med), min-height var(--transition-med);
}
.site-header::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(8, 27, 48, 0.0);
    backdrop-filter: blur(0px);
    transition: background var(--transition-med), backdrop-filter var(--transition-med);
    z-index: -1;
}
.site-header.is-scrolled {
    min-height: 72px;
    box-shadow: var(--shadow-sm);
}
.site-header.is-scrolled::before {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(14px);
}
.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: var(--sp-5);
}
.brand { display: flex; align-items: center; gap: var(--sp-3); min-width: 0; }
.brand__mark { transition: opacity var(--transition-fast); flex-shrink: 0; }
.brand__mark--light { position: absolute; opacity: 0; }
.site-header.is-scrolled .brand__mark--dark { opacity: 1; }
.site-header.is-scrolled .brand__mark--light { opacity: 0; }
.site-header:not(.is-scrolled) .brand__mark--dark { opacity: 0; }
.site-header:not(.is-scrolled) .brand__mark--light { opacity: 1; position: relative; }
.site-header:not(.is-scrolled) .brand__mark--dark { position: absolute; }
.brand__text { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.brand__text strong {
    font-family: var(--font-display);
    font-size: clamp(0.95rem, 1.4vw + 0.5rem, 1.15rem);
    font-weight: 800;
    letter-spacing: 0.01em;
    color: var(--white);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 62vw;
    transition: color var(--transition-med);
}
.brand__text small {
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.75);
    transition: color var(--transition-med);
}
.site-header.is-scrolled .brand__text strong { color: var(--navy-900); }
.site-header.is-scrolled .brand__text small { color: var(--slate-600); }

.main-nav ul { display: flex; align-items: center; gap: var(--sp-6); }
.main-nav a {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: rgba(255,255,255,0.85);
    position: relative;
    padding-block: var(--sp-2);
    transition: color var(--transition-fast);
}
.main-nav a::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: -2px;
    height: 2px;
    background: var(--amber-500);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-fast);
}
.main-nav a:hover, .main-nav a.is-active { color: var(--white); }
.main-nav a:hover::after, .main-nav a.is-active::after { transform: scaleX(1); }
.site-header.is-scrolled .main-nav a { color: var(--slate-800); }
.site-header.is-scrolled .main-nav a:hover, .site-header.is-scrolled .main-nav a.is-active { color: var(--navy-900); }

.site-header__actions { display: flex; align-items: center; gap: var(--sp-4); }
.main-nav__cta { display: none; }

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 42px;
    height: 42px;
    gap: 5px;
    border-radius: var(--radius-sm);
    z-index: 10;
}
.hamburger span {
    width: 22px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast), background var(--transition-fast);
}
.site-header.is-scrolled .hamburger span { background: var(--navy-900); }
.hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.hamburger.is-open span { background: var(--navy-900) !important; }

.mobile-nav-backdrop {
    position: fixed; inset: 0; background: rgba(8,27,48,0.5);
    z-index: 90; opacity: 0; pointer-events: none; transition: opacity var(--transition-med);
}
.mobile-nav-backdrop.is-visible { opacity: 1; pointer-events: auto; }

/* =========================================================================
   6. HERO
   ====================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: calc(var(--header-h) + env(safe-area-inset-top, 0px));
    padding-bottom: var(--sp-9);
    background: radial-gradient(120% 100% at 15% 0%, #123E66 0%, var(--navy-950) 55%, #05121F 100%);
    color: var(--white);
    overflow: hidden;
    isolation: isolate;
}
.hero__grid-overlay {
    position: absolute;
    inset: 0;
    z-index: 0;
    opacity: 0.35;
    background-image:
        linear-gradient(rgba(140, 180, 220, 0.14) 1px, transparent 1px),
        linear-gradient(90deg, rgba(140, 180, 220, 0.14) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: radial-gradient(80% 70% at 50% 30%, black 40%, transparent 100%);
}
.hero__glow {
    position: absolute;
    z-index: 0;
    border-radius: 50%;
    filter: blur(90px);
    pointer-events: none;
}
.hero__glow--1 {
    width: 620px; height: 620px;
    background: radial-gradient(circle, rgba(46,134,222,0.55), transparent 70%);
    top: -180px; right: -120px;
}
.hero__glow--2 {
    width: 480px; height: 480px;
    background: radial-gradient(circle, rgba(26,95,180,0.4), transparent 70%);
    bottom: -160px; left: -140px;
}
.hero__floating-shape {
    position: absolute;
    z-index: 0;
    border: 1.5px solid rgba(255,255,255,0.14);
    border-radius: var(--radius-lg);
    animation: floatShape 9s ease-in-out infinite;
}
.hero__floating-shape--1 { width: 90px; height: 90px; top: 22%; left: 6%; animation-delay: 0s; transform: rotate(12deg); }
.hero__floating-shape--2 { width: 46px; height: 46px; top: 68%; left: 12%; border-radius: 50%; animation-delay: 1.2s; }
.hero__floating-shape--3 { width: 60px; height: 60px; top: 14%; right: 30%; animation-delay: 2.4s; transform: rotate(-8deg); }
@keyframes floatShape {
    0%, 100% { transform: translateY(0) rotate(var(--r, 0deg)); }
    50% { transform: translateY(-22px) rotate(var(--r, 0deg)); }
}

.hero__inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    gap: var(--sp-8);
    align-items: center;
    width: 100%;
}
.hero__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    padding: 0.4rem 0.9rem 0.4rem 0.6rem;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.06);
    font-size: var(--fs-xs);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--steel-300);
    margin-bottom: var(--sp-5);
}
.hero__eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--amber-500); box-shadow: 0 0 0 4px rgba(245,165,36,0.25); }

.hero__title {
    font-size: var(--fs-4xl);
    color: var(--white);
    margin-bottom: var(--sp-5);
}
.hero__title .accent { color: var(--blue-500); }
.hero__subtitle {
    font-size: var(--fs-lg);
    color: var(--steel-300);
    max-width: 46ch;
    margin-bottom: var(--sp-7);
}
.hero__ctas { display: flex; flex-wrap: wrap; gap: var(--sp-4); margin-bottom: var(--sp-9); }

.hero__stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--sp-6);
    width: 100%;
    padding-top: var(--sp-6);
    border-top: 1px solid rgba(255,255,255,0.14);
}
.hero__stat-value {
    font-family: var(--font-display);
    font-size: var(--fs-2xl);
    font-weight: 800;
    color: var(--white);
    display: block;
    line-height: 1.1;
}
.hero__stat-label {
    font-size: var(--fs-xs);
    color: var(--steel-300);
    letter-spacing: 0.02em;
}

/* Visual 3D area */
.hero__visual {
    position: relative;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero__visual-ring {
    position: absolute;
    inset: 6%;
    border: 1px dashed rgba(255,255,255,0.18);
    border-radius: 50%;
    animation: spinSlow 40s linear infinite;
}
@keyframes spinSlow { to { transform: rotate(360deg); } }
.hero__illustration {
    position: relative;
    width: 100%;
    max-width: 460px;
    filter: drop-shadow(0 30px 45px rgba(3, 12, 22, 0.55));
    transition: transform 120ms linear;
}
.hero__photo-badge {
    position: absolute;
    bottom: 6%;
    left: -4%;
    width: 168px;
    background: rgba(11, 30, 51, 0.55);
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: var(--radius-md);
    padding: var(--sp-2);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
    animation: floatShape 8s ease-in-out infinite;
}
.hero__photo-badge img { border-radius: calc(var(--radius-md) - 6px); aspect-ratio: 4/3; object-fit: cover; }
.hero__photo-badge span {
    display: block;
    margin-top: 6px;
    font-size: 0.6rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--steel-300);
    text-align: center;
}
.hero__corner-tag {
    position: absolute;
    top: 4%;
    right: 2%;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--steel-300);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-full);
    padding: 0.35rem 0.75rem;
    background: rgba(255,255,255,0.05);
}
.hero__corner-tag svg { width: 12px; height: 12px; }

.hero__scroll-indicator {
    position: absolute;
    left: 50%;
    bottom: var(--sp-4);
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--sp-2);
    color: var(--steel-300);
    font-size: var(--fs-xs);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    z-index: 1;
}
.hero__scroll-indicator .mouse {
    width: 24px; height: 38px;
    border: 1.5px solid rgba(255,255,255,0.4);
    border-radius: var(--radius-full);
    position: relative;
}
.hero__scroll-indicator .mouse::before {
    content: "";
    position: absolute;
    top: 6px; left: 50%;
    width: 4px; height: 8px;
    background: var(--amber-500);
    border-radius: var(--radius-full);
    transform: translateX(-50%);
    animation: scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot {
    0% { opacity: 1; transform: translate(-50%, 0); }
    70% { opacity: 0; transform: translate(-50%, 10px); }
    100% { opacity: 0; transform: translate(-50%, 10px); }
}

/* =========================================================================
   7. SCROLL REVEAL ANIMATIONS (Intersection Observer driven)
   ====================================================================== */
[data-reveal] {
    opacity: 0;
    transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out);
    will-change: transform, opacity;
}
[data-reveal="fade"] { transform: translateY(14px); }
[data-reveal="up"] { transform: translateY(46px); }
[data-reveal="left"] { transform: translateX(-46px); }
[data-reveal="right"] { transform: translateX(46px); }
[data-reveal="zoom"] { transform: scale(0.92); }
[data-reveal].is-visible { opacity: 1; transform: translate(0) scale(1); }

/* Stagger anak elemen otomatis via delay index */
[data-reveal-group] > * { transition-delay: calc(var(--stagger-index, 0) * 90ms); }

/* =========================================================================
   8. PAGE BANNER (halaman selain beranda)
   ====================================================================== */
.page-banner {
    position: relative;
    padding-top: calc(var(--header-h) + var(--sp-9));
    padding-bottom: var(--sp-9);
    background: radial-gradient(120% 140% at 85% 0%, #123E66 0%, var(--navy-950) 55%, #05121F 100%);
    color: var(--white);
    overflow: hidden;
}
.page-banner__grid {
    position: absolute; inset: 0; opacity: 0.3;
    background-image:
        linear-gradient(rgba(140,180,220,0.14) 1px, transparent 1px),
        linear-gradient(90deg, rgba(140,180,220,0.14) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(70% 100% at 80% 0%, black 30%, transparent 100%);
}
.page-banner__inner { position: relative; z-index: 1; }
.breadcrumb {
    display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-2);
    font-size: var(--fs-xs);
    color: var(--steel-300);
    margin-bottom: var(--sp-5);
    letter-spacing: 0.02em;
}
.breadcrumb a { color: var(--steel-300); transition: color var(--transition-fast); }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb span[aria-hidden] { opacity: 0.5; }
.breadcrumb .is-current { color: var(--white); font-weight: 600; }
.page-banner__title { font-size: var(--fs-3xl); color: var(--white); margin-bottom: var(--sp-3); max-width: 46ch; }
.page-banner__desc { color: var(--steel-300); font-size: var(--fs-lg); max-width: 62ch; }

/* =========================================================================
   9. KARTU KEUNGGULAN (Advantages)
   ====================================================================== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-6);
}
.advantage-card {
    position: relative;
    background: var(--white);
    border: 1px solid var(--fog-100);
    border-radius: var(--radius-lg);
    padding: var(--sp-6);
    transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
}
.advantage-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.advantage-card__corner {
    position: absolute; top: 14px; right: 14px;
    width: 14px; height: 14px;
    border-top: 2px solid var(--steel-300);
    border-right: 2px solid var(--steel-300);
    opacity: 0.7;
}
.advantage-card__icon {
    width: 54px; height: 54px;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius-md);
    background: linear-gradient(145deg, var(--navy-900), var(--blue-700));
    color: var(--white);
    margin-bottom: var(--sp-5);
}
.advantage-card h3 { font-size: var(--fs-lg); margin-bottom: var(--sp-2); }
.advantage-card p { color: var(--color-text-muted); font-size: var(--fs-sm); margin: 0; }

/* =========================================================================
   10. TENTANG / VISI MISI
   ====================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: var(--sp-9);
    align-items: center;
}
.about-visual {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/5;
    box-shadow: var(--shadow-lg);
}
.about-visual img { width: 100%; height: 100%; object-fit: cover; }
.about-visual__badge {
    position: absolute;
    left: var(--sp-5); bottom: var(--sp-5);
    background: rgba(8,27,48,0.65);
    backdrop-filter: blur(8px);
    color: var(--white);
    border-radius: var(--radius-md);
    padding: var(--sp-4) var(--sp-5);
    border: 1px solid rgba(255,255,255,0.16);
}
.about-visual__badge strong { display: block; font-family: var(--font-display); font-size: var(--fs-xl); }
.about-visual__badge span { font-size: var(--fs-xs); color: var(--steel-300); text-transform: uppercase; letter-spacing: 0.06em; }

.vision-mission { margin-top: var(--sp-7); display: grid; gap: var(--sp-5); }
.vm-card {
    border-left: 3px solid var(--amber-500);
    background: var(--fog-50);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: var(--sp-5) var(--sp-6);
}
.vm-card h3 {
    font-size: var(--fs-base);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-primary);
    margin-bottom: var(--sp-2);
}
.vm-card p, .vm-card ul { margin: 0; color: var(--color-text-muted); font-size: var(--fs-sm); }
.vm-card ul { display: grid; gap: var(--sp-2); }
.vm-card ul li { padding-left: 1.3em; position: relative; }
.vm-card ul li::before {
    content: "";
    position: absolute; left: 0; top: 0.55em;
    width: 6px; height: 6px;
    background: var(--blue-500);
    border-radius: 2px;
    transform: rotate(45deg);
}

/* =========================================================================
   11. PRODUK - PREVIEW (Beranda) & HALAMAN PENUH
   ====================================================================== */
.product-preview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-9);
    align-items: center;
}
.product-visual-frame {
    position: relative;
    background: linear-gradient(160deg, var(--navy-950), var(--navy-900));
    border-radius: var(--radius-lg);
    padding: var(--sp-8);
    display: flex; align-items: center; justify-content: center;
    aspect-ratio: 1/1;
    overflow: hidden;
}
.product-visual-frame .hero__grid-overlay { opacity: 0.25; }
.product-visual-frame img, .product-visual-frame svg { position: relative; z-index: 1; max-width: 88%; }

.product-info h2 { margin-bottom: var(--sp-4); }
.product-info > p { color: var(--color-text-muted); font-size: var(--fs-lg); }

.mini-size-table {
    width: 100%;
    border-collapse: collapse;
    margin-block: var(--sp-6);
    font-size: var(--fs-sm);
}
.mini-size-table th, .mini-size-table td {
    padding: var(--sp-3) var(--sp-4);
    text-align: left;
    border-bottom: 1px solid var(--fog-100);
}
.mini-size-table th {
    font-family: var(--font-display);
    text-transform: uppercase;
    font-size: var(--fs-xs);
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}
.mini-size-table tr:last-child td { border-bottom: none; }
.status-badge {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: var(--fs-xs); font-weight: 600;
    color: #0F9D58;
    background: rgba(15,157,88,0.1);
    padding: 0.25rem 0.7rem;
    border-radius: var(--radius-full);
}
.status-badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: #0F9D58; }

/* Halaman produk penuh */
.product-hero-strip {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--sp-8);
    align-items: center;
}
.product-tabs { display: flex; gap: var(--sp-3); margin-bottom: var(--sp-6); flex-wrap: wrap; }
.product-tab-btn {
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--fog-100);
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}
.product-tab-btn.is-active, .product-tab-btn:hover { border-color: var(--color-primary); color: var(--color-primary); background: rgba(26,95,180,0.06); }

.size-table-wrap {
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--fog-100);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.size-table-wrap__head {
    padding: var(--sp-5) var(--sp-6);
    border-bottom: 1px solid var(--fog-100);
    display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4); flex-wrap: wrap;
}
.size-table-search {
    display: flex; align-items: center; gap: var(--sp-2);
    background: var(--fog-50);
    border: 1px solid var(--fog-100);
    border-radius: var(--radius-full);
    padding: 0.5rem 1rem;
}
.size-table-search input { background: none; border: none; font-size: var(--fs-sm); width: 160px; }
.size-table-search input:focus { outline: none; }
.size-table-search svg { color: var(--steel-400); flex-shrink: 0; }

.size-table {
    width: 100%;
    border-collapse: collapse;
}
.size-table th, .size-table td {
    padding: var(--sp-4) var(--sp-6);
    text-align: left;
    font-size: var(--fs-sm);
    border-bottom: 1px solid var(--fog-100);
}
.size-table thead th {
    background: var(--fog-50);
    font-family: var(--font-display);
    text-transform: uppercase;
    font-size: var(--fs-xs);
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    position: sticky; top: 0;
}
.size-table tbody tr { transition: background var(--transition-fast); }
.size-table tbody tr:hover { background: var(--fog-50); }
.size-table tbody tr:last-child td { border-bottom: none; }
.size-table td.size-value { font-family: var(--font-display); font-weight: 700; color: var(--navy-900); }
.size-table .row-wa-btn {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: var(--fs-xs); font-weight: 600; color: var(--color-primary);
}
.size-table .row-wa-btn:hover { text-decoration: underline; }
.size-table-empty { padding: var(--sp-8); text-align: center; color: var(--color-text-muted); display: none; }

.spec-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-3) var(--sp-8);
}
.spec-row { display: flex; justify-content: space-between; gap: var(--sp-4); padding-block: var(--sp-3); border-bottom: 1px dashed var(--fog-100); font-size: var(--fs-sm); }
.spec-row dt { color: var(--color-text-muted); }
.spec-row dd { margin: 0; font-weight: 600; text-align: right; }

.cta-banner {
    background: linear-gradient(120deg, var(--navy-900), var(--blue-700));
    border-radius: var(--radius-lg);
    padding: var(--sp-8);
    color: var(--white);
    display: flex; align-items: center; justify-content: space-between; gap: var(--sp-6); flex-wrap: wrap;
    position: relative;
    overflow: hidden;
}
.cta-banner::after {
    content: "";
    position: absolute; inset: 0;
    background-image: linear-gradient(rgba(255,255,255,0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px);
    background-size: 32px 32px;
    mask-image: radial-gradient(70% 100% at 100% 0%, black 0%, transparent 80%);
}
.cta-banner__text { position: relative; z-index: 1; max-width: 480px; }
.cta-banner__text h3 { color: var(--white); font-size: var(--fs-2xl); margin-bottom: var(--sp-2); }
.cta-banner__text p { color: var(--steel-300); margin: 0; }
.cta-banner__action { position: relative; z-index: 1; }

/* =========================================================================
   12. GALERI (Masonry + Lightbox)
   ====================================================================== */
.gallery-filter { display: flex; gap: var(--sp-3); flex-wrap: wrap; margin-bottom: var(--sp-7); }
.gallery-masonry {
    columns: 3 260px;
    column-gap: var(--sp-5);
}
.gallery-item {
    break-inside: avoid;
    margin-bottom: var(--sp-5);
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: zoom-in;
    box-shadow: var(--shadow-sm);
}
.gallery-item img { width: 100%; display: block; transition: transform var(--transition-med); }
.gallery-item:hover img { transform: scale(1.06); }
.gallery-item__overlay {
    position: absolute; inset: 0;
    background: linear-gradient(0deg, rgba(8,27,48,0.85) 0%, transparent 55%);
    display: flex; align-items: flex-end;
    padding: var(--sp-4);
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.gallery-item:hover .gallery-item__overlay { opacity: 1; }
.gallery-item__overlay p { color: var(--white); font-size: var(--fs-sm); font-weight: 600; margin: 0; }
.gallery-item__overlay span { color: var(--steel-300); font-size: var(--fs-xs); }

.lightbox {
    position: fixed; inset: 0; z-index: 200;
    background: rgba(5, 15, 26, 0.94);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; pointer-events: none;
    transition: opacity var(--transition-med);
    padding: var(--sp-6);
}
.lightbox.is-open { opacity: 1; pointer-events: auto; }
.lightbox img { max-height: 82vh; max-width: 100%; border-radius: var(--radius-md); box-shadow: var(--shadow-lg); }
.lightbox__caption { color: var(--steel-300); text-align: center; margin-top: var(--sp-4); font-size: var(--fs-sm); }
.lightbox__close, .lightbox__nav {
    position: absolute;
    color: var(--white);
    width: 46px; height: 46px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    display: flex; align-items: center; justify-content: center;
    transition: background var(--transition-fast);
}
.lightbox__close:hover, .lightbox__nav:hover { background: rgba(255,255,255,0.18); }
.lightbox__close { top: var(--sp-6); right: var(--sp-6); }
.lightbox__nav--prev { left: var(--sp-6); top: 50%; transform: translateY(-50%); }
.lightbox__nav--next { right: var(--sp-6); top: 50%; transform: translateY(-50%); }

/* =========================================================================
   13. FAQ ACCORDION
   ====================================================================== */
.faq-list { max-width: 820px; margin-inline: auto; display: grid; gap: var(--sp-3); }
.faq-item {
    background: var(--white);
    border: 1px solid var(--fog-100);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.faq-question {
    width: 100%;
    display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4);
    padding: var(--sp-5) var(--sp-6);
    text-align: left;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--fs-base);
}
.faq-question .faq-icon {
    flex-shrink: 0;
    width: 30px; height: 30px;
    border-radius: 50%;
    background: var(--fog-50);
    display: flex; align-items: center; justify-content: center;
    color: var(--color-primary);
    transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}
.faq-item.is-open .faq-icon { background: var(--color-primary); color: var(--white); transform: rotate(45deg); }
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-med);
}
.faq-answer__inner { padding: 0 var(--sp-6) var(--sp-5); color: var(--color-text-muted); font-size: var(--fs-sm); }

/* =========================================================================
   14. KONTAK
   ====================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: var(--sp-9);
    align-items: start;
}
.contact-info-card {
    background: var(--white);
    border: 1px solid var(--fog-100);
    border-radius: var(--radius-lg);
    padding: var(--sp-6);
    display: flex; gap: var(--sp-4);
    margin-bottom: var(--sp-4);
}
.contact-info-card__icon {
    flex-shrink: 0;
    width: 46px; height: 46px;
    border-radius: var(--radius-md);
    background: linear-gradient(145deg, var(--navy-900), var(--blue-700));
    color: var(--white);
    display: flex; align-items: center; justify-content: center;
}
.contact-info-card h3 { font-size: var(--fs-base); margin-bottom: 4px; }
.contact-info-card p, .contact-info-card a { font-size: var(--fs-sm); color: var(--color-text-muted); margin: 0; }
.contact-info-card a:hover { color: var(--color-primary); }

.map-embed {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--fog-100);
    aspect-ratio: 16/10;
    margin-top: var(--sp-6);
}
.map-embed iframe { width: 100%; height: 100%; border: 0; }

.contact-form-card {
    background: var(--white);
    border: 1px solid var(--fog-100);
    border-radius: var(--radius-lg);
    padding: var(--sp-8);
    box-shadow: var(--shadow-sm);
}
.form-row { margin-bottom: var(--sp-5); }
.form-row--2col { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-5); }
.form-label { display: block; font-size: var(--fs-sm); font-weight: 600; margin-bottom: var(--sp-2); }
.form-control {
    width: 100%;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--fog-100);
    background: var(--fog-50);
    font-size: var(--fs-sm);
    transition: border-color var(--transition-fast), background var(--transition-fast);
}
.form-control:focus { outline: none; border-color: var(--blue-500); background: var(--white); }
textarea.form-control { resize: vertical; min-height: 130px; }
.form-hint { font-size: var(--fs-xs); color: var(--color-text-muted); margin-top: var(--sp-2); }
.form-alert { padding: var(--sp-4) var(--sp-5); border-radius: var(--radius-sm); font-size: var(--fs-sm); margin-bottom: var(--sp-5); }
.form-alert--success { background: rgba(15,157,88,0.1); color: #0F9D58; }
.form-alert--error { background: rgba(220,53,69,0.1); color: #DC3545; }
.honeypot-field { position: absolute; left: -9999px; opacity: 0; height: 0; width: 0; }

/* =========================================================================
   15. FOOTER
   ====================================================================== */
.site-footer {
    background: var(--navy-950);
    color: var(--steel-300);
    position: relative;
}
.footer-dimension-divider {
    height: 10px;
    background: repeating-linear-gradient(90deg, var(--amber-500) 0 26px, transparent 26px 52px);
    opacity: 0.85;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.3fr 0.8fr 0.9fr 1fr;
    gap: var(--sp-8);
    padding-block: var(--sp-9);
}
.footer-col h3 {
    color: var(--white);
    font-size: var(--fs-sm);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--sp-5);
}
.footer-col p { font-size: var(--fs-sm); line-height: 1.7; }
.brand--footer { margin-bottom: var(--sp-5); }
.brand--footer .brand__text strong { color: var(--white); }
.brand--footer .brand__text small { color: var(--steel-400); }
.footer-links { display: grid; gap: var(--sp-3); }
.footer-links a { font-size: var(--fs-sm); transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--white); }
.footer-contact { display: grid; gap: var(--sp-4); }
.footer-contact li { display: flex; align-items: center; gap: var(--sp-2); font-size: var(--fs-sm); }
.footer-contact a:hover { color: var(--white); }
.footer-contact__hours { color: var(--steel-400); font-size: var(--fs-xs) !important; }
address { font-size: var(--fs-sm); line-height: 1.7; }
.footer-map-link { display: inline-block; margin-top: var(--sp-3); font-size: var(--fs-sm); font-weight: 600; color: var(--blue-500); }
.footer-map-link:hover { color: var(--white); }

.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-block: var(--sp-5); }
.footer-bottom__inner { display: flex; justify-content: space-between; align-items: center; gap: var(--sp-4); flex-wrap: wrap; }
.footer-bottom p { margin: 0; font-size: var(--fs-xs); color: var(--steel-400); }

/* =========================================================================
   16. FLOATING ACTIONS
   ====================================================================== */
.fab-whatsapp {
    position: fixed;
    right: var(--sp-5); bottom: var(--sp-5);
    width: 58px; height: 58px;
    background: #25D366;
    color: var(--white);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 10px 26px rgba(37,211,102,0.45);
    z-index: 80;
    animation: pulseWa 2.6s ease-in-out infinite;
}
@keyframes pulseWa {
    0%, 100% { box-shadow: 0 10px 26px rgba(37,211,102,0.45); }
    50% { box-shadow: 0 10px 34px rgba(37,211,102,0.7), 0 0 0 8px rgba(37,211,102,0.12); }
}
.back-to-top {
    position: fixed;
    right: var(--sp-5); bottom: 92px;
    width: 44px; height: 44px;
    background: var(--white);
    color: var(--navy-900);
    border: 1px solid var(--fog-100);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-sm);
    z-index: 80;
    opacity: 0; pointer-events: none;
    transform: translateY(10px);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}
.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

/* =========================================================================
   17. UTILITAS
   ====================================================================== */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-2 { gap: var(--sp-2); }
.gap-4 { gap: var(--sp-4); }
.hide-mobile { display: initial; }
.show-mobile { display: none; }

/* =========================================================================
   18. RESPONSIVE — 1024px (navigasi menjadi drawer, grid dirapatkan)
   ====================================================================== */
@media (max-width: 1024px) {
    .hamburger { display: flex; }
    .main-nav {
        position: fixed;
        top: 0; right: 0;
        height: 100dvh;
        width: min(320px, 82vw);
        background: var(--white);
        box-shadow: var(--shadow-lg);
        padding: calc(var(--header-h) + var(--sp-6)) var(--sp-6) var(--sp-6);
        transform: translateX(100%);
        transition: transform var(--transition-med);
        z-index: 95;
        overflow-y: auto;
    }
    .main-nav.is-open { transform: translateX(0); }
    .main-nav ul { flex-direction: column; align-items: flex-start; gap: var(--sp-1); width: 100%; }
    .main-nav ul li { width: 100%; }
    .main-nav a { color: var(--slate-800); display: block; padding: var(--sp-3) 0; width: 100%; }
    .main-nav a::after { display: none; }
    .main-nav a.is-active { color: var(--color-primary); }

    .hero__inner { grid-template-columns: 1fr; text-align: left; }
    .hero__visual { max-width: 380px; margin-inline: auto; margin-top: var(--sp-8); }
    .hero__stats { grid-template-columns: repeat(2, 1fr); }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; }
    .about-visual { max-width: 460px; margin-inline: auto; }
    .product-preview, .product-hero-strip { grid-template-columns: 1fr; }
    .product-visual-frame { max-width: 420px; margin-inline: auto; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .spec-grid { grid-template-columns: 1fr; }
    .gallery-masonry { columns: 2 240px; }
}

/* =========================================================================
   19. RESPONSIVE — 768px (tablet)
   ====================================================================== */
@media (max-width: 768px) {
    :root { --header-h: 72px; }
    .hide-mobile { display: none !important; }
    .show-mobile { display: initial; }
    .site-header__wa { display: none; }
    .main-nav__cta { display: block; width: 100%; margin-top: var(--sp-6); padding-top: var(--sp-6); border-top: 1px solid var(--fog-100); }
    .main-nav__cta .btn { width: 100%; display: flex; justify-content: center; align-items: center; gap: 8px; }
    .hero { min-height: auto; padding-bottom: var(--sp-9); }
    .hero__visual { display: none; }
    .hero__ctas .btn { flex: 1 1 auto; justify-content: center; }
    .hero__stats { grid-template-columns: repeat(2, 1fr); gap: var(--sp-5); }
    .advantages-grid { grid-template-columns: 1fr; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: var(--sp-6); }
    .form-row--2col { grid-template-columns: 1fr; }
    .size-table-wrap__head { flex-direction: column; align-items: stretch; }
    .size-table-search { width: 100%; }
    .size-table-search input { width: 100%; }
    .cta-banner { flex-direction: column; align-items: flex-start; }
    .gallery-masonry { columns: 1 100%; }
    .lightbox__nav { width: 38px; height: 38px; }
    .lightbox__close { top: var(--sp-4); right: var(--sp-4); }
    .lightbox__nav--prev { left: var(--sp-3); }
    .lightbox__nav--next { right: var(--sp-3); }
}

/* =========================================================================
   20. RESPONSIVE — 480px / 414 / 390 / 360 / 320 (mobile fine tuning)
   ====================================================================== */
@media (max-width: 480px) {
    .hero__eyebrow { font-size: 0.65rem; }
    .hero__photo-badge { width: 128px; left: -2%; }
    .hero__corner-tag span { display: none; }
    .fab-whatsapp { width: 52px; height: 52px; right: var(--sp-4); bottom: var(--sp-4); }
    .back-to-top { right: var(--sp-4); bottom: 86px; width: 40px; height: 40px; }
    .contact-form-card { padding: var(--sp-5); }
    .advantage-card, .contact-info-card, .vm-card { padding: var(--sp-5); }
    .size-table th, .size-table td { padding: var(--sp-3) var(--sp-4); }
    .dimension-divider span { font-size: 0.6rem; letter-spacing: 0.08em; }
}

@media (max-width: 360px) {
    .hero__stats { grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
    .btn { padding: 0.85rem 1.4rem; }
}