/* ═══════════════════════════════════════════════════════
   INDEX — Halaman Utama
   Konsep: halaman dibuka seperti buku. Kiri = kode (indigo,
   geometris). Kanan = naskah (emas, serif miring). Garis
   tengah tipis berperan sebagai "lipatan" penghubung keduanya.
   ═══════════════════════════════════════════════════════ */

.dot-grid {
    position: absolute; inset: 0;
    background-image: radial-gradient(circle, rgba(255,255,255,0.10) 1px, transparent 1px);
    background-size: 30px 30px;
    mask-image: radial-gradient(ellipse 75% 55% at 50% 30%, black 0%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 75% 55% at 50% 30%, black 0%, transparent 100%);
    pointer-events: none;
    z-index: 0;
}

/* ── HERO ── */
.hero {
    position: relative;
    padding: 168px 5% 64px;
    text-align: center;
    overflow: hidden;
}

.hero-topline {
    position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(to right,
        transparent 0%, var(--acc-dev) 25%, var(--acc-lib) 75%, transparent 100%);
    opacity: 0.55;
    z-index: 4;
}

.hero-content {
    position: relative; z-index: 3;
    max-width: 680px;
    margin: 0 auto;
}

.hero .badge { margin-bottom: 22px; justify-content: center; }

.hero h1 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: clamp(28px, 4.6vw, 46px);
    font-weight: 800;
    letter-spacing: -1.6px;
    line-height: 1.15;
    color: var(--txt);
    margin-bottom: 18px;
}

.hero h1 .word-dev { color: var(--acc-dev); }
.hero h1 .word-lib { color: var(--acc-lib); font-family: 'Fraunces', serif; font-style: italic; font-weight: 600; }

.hero p {
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    line-height: 1.85;
    color: var(--txt-2);
    max-width: 520px;
    margin: 0 auto;
}

/* ── PORTAL SPLIT (signature element) ── */
.portal-section {
    position: relative;
    padding: 20px 5% 70px;
    z-index: 2;
}

.portal-spine {
    position: relative;
    max-width: 1160px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    border: 1px solid var(--line-2);
}

/* Stagger: kartu kanan muncul sedikit lebih lambat dari kiri */
.portal-lib[data-reveal] { transition-delay: 0.12s; }

/* garis tengah "lipatan buku" */
.portal-spine::before {
    content: '';
    position: absolute;
    top: 0; bottom: 0; left: 50%;
    width: 1px;
    background: linear-gradient(to bottom, transparent, var(--line-2) 15%, var(--line-2) 85%, transparent);
    z-index: 2;
}

.portal-spine::after {
    content: '\2022';
    position: absolute;
    top: -1px; left: 50%;
    transform: translate(-50%, -50%);
    width: 26px; height: 26px;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg);
    border: 1px solid var(--line-2);
    border-radius: 50%;
    color: var(--txt-3);
    font-size: 10px;
    z-index: 3;
}

.portal-card {
    position: relative;
    padding: 52px 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    text-decoration: none;
    background: var(--bg-2);
    transition: background 0.3s ease;
    overflow: hidden;
    min-height: 380px;
}

.portal-card:hover { background: var(--bg-3); }

.portal-card::before {
    content: '';
    position: absolute; inset: 0;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    z-index: 0;
}

.portal-dev::before {
    background: radial-gradient(ellipse 70% 60% at 20% 0%, var(--acc-dev-dim) 0%, transparent 70%);
}
.portal-lib::before {
    background: radial-gradient(ellipse 70% 60% at 80% 0%, var(--acc-lib-dim) 0%, transparent 70%);
}
.portal-card:hover::before { opacity: 1; }

.portal-card > * { position: relative; z-index: 1; }

.portal-icon {
    width: 46px; height: 46px;
    display: flex; align-items: center; justify-content: center;
    border: 1px solid var(--line-2);
    margin-bottom: 28px;
    font-size: 18px;
}
.portal-dev .portal-icon { color: var(--acc-dev); border-color: var(--acc-dev-line); background: var(--acc-dev-dim); }
.portal-lib .portal-icon { color: var(--acc-lib); border-color: var(--acc-lib-line); background: var(--acc-lib-dim); }

.portal-eyebrow {
    font-family: 'Inter', sans-serif;
    font-size: 10px; font-weight: 700;
    letter-spacing: 0.16em; text-transform: uppercase;
    margin-bottom: 14px;
}
.portal-dev .portal-eyebrow { color: var(--acc-dev); }
.portal-lib .portal-eyebrow { color: var(--acc-lib); }

.portal-dev h2 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: clamp(20px, 2.4vw, 25px);
    font-weight: 800;
    letter-spacing: -0.6px;
    line-height: 1.25;
    color: var(--txt);
    margin-bottom: 16px;
}

.portal-lib h2 {
    font-family: 'Fraunces', serif;
    font-style: italic;
    font-size: clamp(21px, 2.6vw, 27px);
    font-weight: 600;
    letter-spacing: -0.4px;
    line-height: 1.25;
    color: var(--txt);
    margin-bottom: 16px;
}

.portal-card p {
    font-family: 'Inter', sans-serif;
    font-size: 13.5px;
    line-height: 1.85;
    color: var(--txt-2);
    margin: 0 auto 26px;
    max-width: 380px;
}

.portal-tags {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 8px;
    margin-bottom: 32px;
}

.portal-tags span {
    font-family: 'Inter', sans-serif;
    font-size: 10.5px; font-weight: 600;
    padding: 5px 11px;
    border: 1px solid var(--line-2);
    color: var(--txt-2);
    letter-spacing: 0.02em;
}

.portal-cta {
    margin-top: auto;
    display: inline-flex; align-items: center; justify-content: center; gap: 9px;
    font-family: 'Inter', sans-serif;
    font-size: 11.5px; font-weight: 700;
    letter-spacing: 0.06em; text-transform: uppercase;
    transition: gap 0.2s ease;
}
.portal-dev .portal-cta { color: var(--acc-dev); }
.portal-lib .portal-cta { color: var(--acc-lib); }
.portal-card:hover .portal-cta { gap: 14px; }

.portal-cta i { font-size: 11px; }

@media (max-width: 820px) {
    .portal-spine { grid-template-columns: 1fr; }
    .portal-spine::before { left: 0; right: 0; top: 50%; bottom: auto; width: auto; height: 1px;
        background: linear-gradient(to right, transparent, var(--line-2) 15%, var(--line-2) 85%, transparent); }
    .portal-spine::after { top: 50%; left: 50%; }
    .portal-card { padding: 44px 28px; min-height: unset; }
}

@media (max-width: 480px) {
    .hero { padding: 130px 6% 44px; }
}