/* Peervie v1.11 — landing platform futuristik, rata tengah.
 * Tema dipilih Super Admin: <body class="landing lt-{nebula|cyber|aurora|orbit}">.
 * Tiap tema punya varian terang & gelap (mengikuti tombol tema / preferensi sistem).
 * Animasi murni CSS; dimatikan bila pengguna memilih "reduce motion".
 *
 * Kinerja (v1.11.1): tidak ada `filter: blur()` maupun `backdrop-filter` (sangat mahal
 * di GPU/CPU lemah) — kelembutan didapat dari radial-gradient. Latar dipaku di satu
 * layer komposit (tidak di-repaint saat gulir) dan hanya `transform` yang dianimasikan,
 * sehingga animasi berjalan di compositor. Di layar sentuh/HP, latar tidak dianimasikan. */

/* ── kerangka bersama ─────────────────────────────────────────────────── */
body.landing {
  --lt-radius: 20px;
  --lt-font-head: var(--font);
  --lt-stars: 0;
  background: var(--lt-bg); color: var(--lt-fg); overflow-x: hidden;
  /* Variabel dasar app.css mengikuti tema agar header, tombol tema, & footer selaras. */
  --brand: var(--lt-a1); --on-brand: var(--lt-on-accent); --text: var(--lt-fg); --muted: var(--lt-muted);
  --line: var(--lt-border); --line-2: var(--lt-border); --bg-2: var(--lt-card); --panel-2: var(--lt-card);
}
.landing .site-head { background: color-mix(in srgb, var(--lt-bg) 88%, transparent); border-bottom-color: var(--lt-border); backdrop-filter: none; -webkit-backdrop-filter: none; }
.landing .site-head .btn { border-radius: 999px; }
.landing .brand-mark { background: linear-gradient(135deg, var(--lt-a1), var(--lt-a2)); box-shadow: 0 0 22px -4px var(--lt-glow); }
.landing .site-main, .landing .site-foot { position: relative; z-index: 1; }
.landing .site-foot { background: transparent; border-top-color: var(--lt-border); }
.landing .site-foot .row { justify-content: center; gap: 1.5rem; }

/* z-index -1: di bawah seluruh konten <main> (yang membentuk stacking context sendiri). */
.lt-bg { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; contain: strict; transform: translateZ(0); }
.lt-bg > span { display: none; position: absolute; }

.lt-preview { margin: 1rem auto 0; max-width: 640px; text-align: center; font-size: .86rem; padding: .5rem 1rem; border-radius: 999px;
  border: 1px dashed var(--lt-a2); color: var(--lt-fg); background: var(--lt-card); }

.lt-hero { display: grid; justify-items: center; text-align: center; padding: clamp(3.5rem, 10vw, 7rem) 0 1rem; }
.lt-badge { display: inline-flex; align-items: center; gap: .55rem; margin: 0; padding: .4rem 1rem; border-radius: 999px; font-size: .82rem;
  color: var(--lt-muted); background: var(--lt-card); border: 1px solid var(--lt-border); }
.lt-pulse { position: relative; width: 8px; height: 8px; border-radius: 50%; background: var(--lt-a2); }
.lt-pulse::after { content: ""; position: absolute; inset: 0; border-radius: 50%; background: var(--lt-a2); animation: lt-pulse 2.4s ease-out infinite; }
.lt-title { font-family: var(--lt-font-head); font-size: clamp(2.2rem, 6.4vw, 4.6rem); line-height: 1.04; letter-spacing: -.035em; font-weight: 800;
  max-width: 15ch; margin: 1.5rem auto 1.3rem; text-wrap: balance; }
.lt-grad { background: linear-gradient(100deg, var(--lt-a1), var(--lt-a2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lt-lead { max-width: 62ch; margin: 0 auto; color: var(--lt-muted); font-size: clamp(1rem, 1.7vw, 1.16rem); text-wrap: pretty; }
.lt-lead .mono { color: var(--lt-fg); }
.lt-cta { display: flex; flex-wrap: wrap; justify-content: center; gap: .8rem; margin: 2.2rem 0 3rem; }
.lt-btn { padding: .85rem 1.6rem; border: 0; border-radius: 999px; font-size: 1rem; color: var(--lt-on-accent);
  background: linear-gradient(120deg, var(--lt-a1), var(--lt-a2)); box-shadow: 0 14px 34px -12px var(--lt-glow); }
.lt-btn:hover { background: linear-gradient(120deg, var(--lt-a1), var(--lt-a2)); filter: brightness(1.08); box-shadow: 0 18px 44px -12px var(--lt-glow); transform: translateY(-1px); }
.lt-btn-ghost { padding: .85rem 1.6rem; border-radius: 999px; font-size: 1rem; background: var(--lt-card); border-color: var(--lt-border); color: var(--lt-fg); }
.lt-btn-ghost:hover { background: var(--lt-card); border-color: var(--lt-a1); }

.lt-stats { display: flex; flex-wrap: wrap; justify-content: center; gap: clamp(1.2rem, 6vw, 4.5rem); margin: 0; }
.lt-stats > div { display: flex; flex-direction: column-reverse; align-items: center; }
.lt-stats dd { margin: 0; font-family: var(--lt-font-head); font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; letter-spacing: -.03em; line-height: 1.1;
  background: linear-gradient(180deg, var(--lt-fg), color-mix(in srgb, var(--lt-fg) 55%, transparent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lt-stats dt { font-size: .74rem; letter-spacing: .16em; text-transform: uppercase; color: var(--lt-muted); }

.lt-sec { padding: clamp(3.5rem, 9vw, 6rem) 0 0; text-align: center; }
.lt-kicker { margin: 0 0 .5rem; font-family: var(--mono); font-size: .76rem; letter-spacing: .24em; text-transform: uppercase; color: var(--lt-a2); }
.lt-h2 { font-family: var(--lt-font-head); font-size: clamp(1.6rem, 3.8vw, 2.6rem); font-weight: 750; letter-spacing: -.025em; line-height: 1.12;
  max-width: 22ch; margin: 0 auto 2.4rem; text-wrap: balance; }
.lt-muted { color: var(--lt-muted); }
.lt-note { margin-top: 1.4rem; font-size: .9rem; }

.lt-cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(290px, 100%), 1fr)); }
.lt-card, .lt-inst, .lt-steps li {
  position: relative; padding: 1.9rem 1.5rem; border-radius: var(--lt-radius); background: var(--lt-card);
  border: 1px solid var(--lt-border); box-shadow: var(--lt-card-shadow, none);
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.lt-card:hover, .lt-inst:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--lt-a1) 55%, var(--lt-border)); box-shadow: 0 24px 60px -30px var(--lt-glow); }
.lt-card h3, .lt-inst h3, .lt-steps h3 { font-family: var(--lt-font-head); font-size: 1.06rem; margin: 0 0 .45rem; }
.lt-card p, .lt-steps p { margin: 0; color: var(--lt-muted); font-size: .93rem; }
.lt-ico { display: grid; place-items: center; width: 52px; height: 52px; margin: 0 auto 1.1rem; border-radius: 16px; color: var(--lt-a1);
  background: color-mix(in srgb, var(--lt-a1) 13%, transparent); border: 1px solid color-mix(in srgb, var(--lt-a1) 30%, transparent); }
.lt-ico svg { width: 25px; height: 25px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

.lt-insts { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }
.lt-inst { flex: 0 1 330px; display: grid; justify-items: center; color: var(--lt-fg); }
.lt-inst:hover { text-decoration: none; }
.lt-inst-mark { display: grid; place-items: center; width: 54px; height: 54px; margin-bottom: 1rem; border-radius: 50%; font-weight: 800; font-size: 1.3rem;
  color: var(--lt-on-accent); background: linear-gradient(135deg, var(--lt-a1), var(--lt-a2)); box-shadow: 0 10px 30px -10px var(--lt-glow); }
.lt-host { margin: 0 0 .8rem; font-size: .8rem; color: var(--lt-muted); overflow-wrap: anywhere; }
.lt-inst-meta { display: flex; gap: .4rem; margin: 0 0 1rem; }
.lt-inst-meta span { padding: .15rem .65rem; border-radius: 999px; font-size: .78rem; color: var(--lt-muted); border: 1px solid var(--lt-border); }
.lt-inst-meta { flex-wrap: wrap; justify-content: center; }
.lt-inst-meta span { white-space: nowrap; }
.lt-go { font-size: .88rem; font-weight: 600; color: var(--lt-a1); }

.lt-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(270px, 100%), 1fr)); }
.lt-step { display: block; margin-bottom: .8rem; font-family: var(--mono); font-size: 2rem; font-weight: 700;
  background: linear-gradient(120deg, var(--lt-a1), var(--lt-a2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lt-final { margin: 4rem auto 1rem; padding: clamp(2.5rem, 6vw, 4rem) 1.5rem; border-radius: calc(var(--lt-radius) + 8px); border: 1px solid var(--lt-border);
  background: radial-gradient(120% 140% at 50% 0%, color-mix(in srgb, var(--lt-a1) 22%, transparent), transparent 60%), var(--lt-card); }
.lt-final .lt-h2 { margin-bottom: 1.6rem; }
.lt-final .lt-muted { margin: 1rem 0 0; font-size: .85rem; }

@keyframes lt-pulse { 0% { transform: scale(1); opacity: .6; } 75%, 100% { transform: scale(3.2); opacity: 0; } }
@keyframes lt-drift { from { transform: translate3d(0, 0, 0); } to { transform: translate3d(5vw, 3vh, 0); } }
@keyframes lt-spin { to { transform: translate(-50%, -50%) rotate(360deg); } }
@keyframes lt-floor { to { transform: translate3d(0, 64px, 0); } }

/* ── Nebula ───────────────────────────────────────────────────────────── */
body.lt-nebula {
  --lt-bg: #f6f3ff; --lt-fg: #1b1338; --lt-muted: #5d5680; --lt-card: rgba(255, 255, 255, .8); --lt-border: rgba(91, 63, 191, .16);
  --lt-a1: #7c3aed; --lt-a2: #0891b2; --lt-glow: rgba(124, 58, 237, .45); --lt-on-accent: #ffffff; --lt-orb-o: .32;
}
:root[data-theme="dark"] body.lt-nebula {
  --lt-bg: #07051a; --lt-fg: #f1ecff; --lt-muted: #aaa3cf; --lt-card: rgba(18, 13, 44, .72); --lt-border: rgba(167, 139, 250, .2);
  --lt-a1: #a78bfa; --lt-a2: #22d3ee; --lt-glow: rgba(139, 92, 246, .65); --lt-on-accent: #0b0620; --lt-orb-o: .55; --lt-stars: .7;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body.lt-nebula {
    --lt-bg: #07051a; --lt-fg: #f1ecff; --lt-muted: #aaa3cf; --lt-card: rgba(18, 13, 44, .72); --lt-border: rgba(167, 139, 250, .2);
    --lt-a1: #a78bfa; --lt-a2: #22d3ee; --lt-glow: rgba(139, 92, 246, .65); --lt-on-accent: #0b0620; --lt-orb-o: .55; --lt-stars: .7;
  }
}
.lt-nebula .lt-orb, .lt-aurora .lt-orb { display: block; border-radius: 50%; opacity: var(--lt-orb-o); will-change: transform; animation: lt-drift 22s ease-in-out infinite alternate; }
.lt-nebula .lt-orb-a { width: 60vw; height: 60vw; top: -24vw; left: -14vw; background: radial-gradient(closest-side, #8b5cf6, rgba(139, 92, 246, .35) 45%, transparent); }
.lt-nebula .lt-orb-b { width: 50vw; height: 50vw; top: 6vh; right: -17vw; background: radial-gradient(closest-side, #06b6d4, rgba(6, 182, 212, .3) 45%, transparent); animation-duration: 28s; animation-direction: alternate-reverse; }
.lt-nebula .lt-orb-c { width: 44vw; height: 44vw; bottom: -20vw; left: 28vw; background: radial-gradient(closest-side, #ec4899, rgba(236, 72, 153, .3) 45%, transparent); opacity: calc(var(--lt-orb-o) * .6); animation-duration: 34s; }
.lt-nebula .lt-stars { display: block; inset: 0; opacity: var(--lt-stars);
  background-image: radial-gradient(1px 1px at 20px 30px, #fff, transparent), radial-gradient(1px 1px at 120px 80px, #fff, transparent),
    radial-gradient(1.5px 1.5px at 70px 150px, #c4b5fd, transparent), radial-gradient(1px 1px at 180px 190px, #fff, transparent),
    radial-gradient(1px 1px at 240px 40px, #a5f3fc, transparent);
  background-size: 260px 220px; }
.lt-nebula .lt-grad { filter: drop-shadow(0 0 24px var(--lt-glow)); }

/* ── Cyber Grid ───────────────────────────────────────────────────────── */
body.lt-cyber {
  --lt-radius: 6px; --lt-font-head: var(--mono);
  --lt-bg: #eef4fa; --lt-fg: #0a1322; --lt-muted: #4a5b72; --lt-card: rgba(255, 255, 255, .78); --lt-border: rgba(8, 145, 178, .28);
  --lt-a1: #0891b2; --lt-a2: #db2777; --lt-glow: rgba(8, 145, 178, .45); --lt-on-accent: #ffffff; --lt-grid: rgba(8, 145, 178, .28);
}
:root[data-theme="dark"] body.lt-cyber {
  --lt-bg: #03050b; --lt-fg: #e3fbff; --lt-muted: #7fa3b5; --lt-card: rgba(4, 14, 22, .82); --lt-border: rgba(0, 229, 255, .24);
  --lt-a1: #00e5ff; --lt-a2: #ff2bd6; --lt-glow: rgba(0, 229, 255, .55); --lt-on-accent: #00141a; --lt-grid: rgba(0, 229, 255, .38);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body.lt-cyber {
    --lt-bg: #03050b; --lt-fg: #e3fbff; --lt-muted: #7fa3b5; --lt-card: rgba(4, 14, 22, .82); --lt-border: rgba(0, 229, 255, .24);
    --lt-a1: #00e5ff; --lt-a2: #ff2bd6; --lt-glow: rgba(0, 229, 255, .55); --lt-on-accent: #00141a; --lt-grid: rgba(0, 229, 255, .38);
  }
}
/* Perspektif di induk: titik hilang (horizon) di ±62% tinggi layar. */
.lt-cyber .lt-bg { perspective: 520px; perspective-origin: 50% 62%; }
.lt-cyber .lt-floor { display: block; left: -45%; right: -45%; bottom: -20vh; height: 140vh; overflow: hidden; transform: rotateX(72deg); transform-origin: 50% 100%; }
/* Pudar ke arah horizon: lapisan gradien statis di atas lantai (mask-image memaksa raster ulang tiap frame). */
.lt-cyber .lt-stars { display: block; inset: 0; background: linear-gradient(to bottom, var(--lt-bg) 61vh, color-mix(in srgb, var(--lt-bg) 55%, transparent) 72vh, transparent 92vh); }
.lt-cyber .lt-floor::before { content: ""; position: absolute; left: 0; right: 0; top: -64px; bottom: 0; will-change: transform; animation: lt-floor 3.5s linear infinite;
  background-image: linear-gradient(var(--lt-grid) 1px, transparent 1px), linear-gradient(90deg, var(--lt-grid) 1px, transparent 1px); background-size: 64px 64px; }
.lt-cyber .lt-orb-a { display: block; z-index: 1; left: 0; right: 0; top: calc(62vh - 90px); height: 180px; opacity: .5;
  background: radial-gradient(50% 50% at 50% 50%, color-mix(in srgb, var(--lt-a2) 45%, transparent), transparent 70%); }
.lt-cyber .lt-title { letter-spacing: -.05em; font-size: clamp(2rem, 4.6vw, 3.5rem); max-width: 26ch; }
.lt-cyber .lt-grad { filter: drop-shadow(0 0 14px var(--lt-glow)); }
.lt-cyber .lt-btn { border-radius: 4px; text-transform: uppercase; letter-spacing: .08em; font-size: .86rem; font-family: var(--mono); }
.lt-cyber .lt-btn-ghost { border-radius: 4px; text-transform: uppercase; letter-spacing: .08em; font-size: .86rem; font-family: var(--mono); }
.lt-cyber .lt-badge, .lt-cyber .lt-inst-meta span { border-radius: 4px; font-family: var(--mono); }
.lt-cyber .lt-card::before, .lt-cyber .lt-inst::before { content: ""; position: absolute; inset: -1px; border-radius: inherit; pointer-events: none;
  background: linear-gradient(var(--lt-a1), var(--lt-a1)) top left / 14px 2px no-repeat, linear-gradient(var(--lt-a1), var(--lt-a1)) top left / 2px 14px no-repeat,
    linear-gradient(var(--lt-a2), var(--lt-a2)) bottom right / 14px 2px no-repeat, linear-gradient(var(--lt-a2), var(--lt-a2)) bottom right / 2px 14px no-repeat; }
.lt-cyber .lt-ico, .lt-cyber .lt-inst-mark { border-radius: 6px; }

/* ── Aurora Glass ─────────────────────────────────────────────────────── */
body.lt-aurora {
  --lt-radius: 26px;
  --lt-bg: #f3f6fb; --lt-fg: #0f172a; --lt-muted: #55607a; --lt-card: rgba(255, 255, 255, .7); --lt-border: rgba(255, 255, 255, .8);
  --lt-a1: #0d9488; --lt-a2: #7c3aed; --lt-glow: rgba(13, 148, 136, .4); --lt-on-accent: #ffffff; --lt-orb-o: .55;
  --lt-card-shadow: 0 10px 40px -12px rgba(31, 38, 135, .14);
}
:root[data-theme="dark"] body.lt-aurora {
  --lt-bg: #0a0f1f; --lt-fg: #eef2ff; --lt-muted: #a3accb; --lt-card: rgba(20, 27, 48, .74); --lt-border: rgba(255, 255, 255, .12);
  --lt-a1: #34d399; --lt-a2: #a78bfa; --lt-glow: rgba(52, 211, 153, .45); --lt-on-accent: #03140e; --lt-orb-o: .32;
  --lt-card-shadow: 0 10px 40px -16px rgba(0, 0, 0, .6);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body.lt-aurora {
    --lt-bg: #0a0f1f; --lt-fg: #eef2ff; --lt-muted: #a3accb; --lt-card: rgba(20, 27, 48, .74); --lt-border: rgba(255, 255, 255, .12);
    --lt-a1: #34d399; --lt-a2: #a78bfa; --lt-glow: rgba(52, 211, 153, .45); --lt-on-accent: #03140e; --lt-orb-o: .32;
    --lt-card-shadow: 0 10px 40px -16px rgba(0, 0, 0, .6);
  }
}
.lt-aurora .lt-orb { animation-duration: 30s; }
.lt-aurora .lt-orb-a { width: 60vw; height: 38vw; top: -14vw; left: -10vw; background: radial-gradient(closest-side, #2dd4bf, rgba(74, 222, 128, .45) 50%, transparent); }
.lt-aurora .lt-orb-b { width: 52vw; height: 36vw; top: -6vw; right: -14vw; background: radial-gradient(closest-side, #a78bfa, rgba(96, 165, 250, .45) 50%, transparent); animation-direction: alternate-reverse; }
.lt-aurora .lt-orb-c { width: 46vw; height: 30vw; top: 46vh; left: 24vw; background: radial-gradient(closest-side, #f472b6, rgba(251, 191, 36, .4) 50%, transparent); opacity: calc(var(--lt-orb-o) * .55); animation-duration: 38s; }

/* ── Orbit ────────────────────────────────────────────────────────────── */
body.lt-orbit {
  --lt-radius: 14px;
  --lt-bg: #ffffff; --lt-fg: #0a0a0a; --lt-muted: #5c5c5c; --lt-card: rgba(255, 255, 255, .86); --lt-border: #e6e6e6;
  --lt-a1: #2563eb; --lt-a2: #2563eb; --lt-glow: rgba(37, 99, 235, .35); --lt-on-accent: #ffffff; --lt-ring: rgba(0, 0, 0, .09);
}
:root[data-theme="dark"] body.lt-orbit {
  --lt-bg: #000000; --lt-fg: #fafafa; --lt-muted: #9a9a9a; --lt-card: rgba(10, 10, 10, .82); --lt-border: #1f1f1f;
  --lt-a1: #3b82f6; --lt-a2: #60a5fa; --lt-glow: rgba(59, 130, 246, .55); --lt-on-accent: #ffffff; --lt-ring: rgba(255, 255, 255, .1);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body.lt-orbit {
    --lt-bg: #000000; --lt-fg: #fafafa; --lt-muted: #9a9a9a; --lt-card: rgba(10, 10, 10, .82); --lt-border: #1f1f1f;
    --lt-a1: #3b82f6; --lt-a2: #60a5fa; --lt-glow: rgba(59, 130, 246, .55); --lt-on-accent: #ffffff; --lt-ring: rgba(255, 255, 255, .1);
  }
}
.lt-orbit .lt-rings { display: block; inset: 0; }
.lt-orbit .lt-rings i { position: absolute; left: 50%; top: 340px; border-radius: 50%; border: 1px solid var(--lt-ring); transform: translate(-50%, -50%); will-change: transform; animation: lt-spin 40s linear infinite; }
.lt-orbit .lt-rings i::after { content: ""; position: absolute; top: -4px; left: 50%; width: 8px; height: 8px; margin-left: -4px; border-radius: 50%;
  background: var(--lt-a1); box-shadow: 0 0 14px 3px var(--lt-glow); }
.lt-orbit .lt-rings i:nth-child(1) { width: 560px; height: 560px; }
.lt-orbit .lt-rings i:nth-child(2) { width: 820px; height: 820px; animation-duration: 70s; animation-direction: reverse; }
.lt-orbit .lt-rings i:nth-child(3) { width: 1100px; height: 1100px; animation-duration: 110s; }
.lt-orbit .lt-rings i:nth-child(3)::after { background: var(--lt-fg); box-shadow: none; width: 5px; height: 5px; margin-left: -2.5px; top: -3px; }
.lt-orbit .lt-grad { background: none; color: var(--lt-a1); }
.lt-orbit .lt-btn { background: var(--lt-a1); box-shadow: none; }
.lt-orbit .lt-btn:hover { background: var(--lt-a1); box-shadow: 0 0 0 4px color-mix(in srgb, var(--lt-a1) 25%, transparent); }
.lt-orbit .lt-step, .lt-orbit .lt-inst-mark { background: none; color: var(--lt-a1); -webkit-background-clip: border-box; background-clip: border-box; }
.lt-orbit .lt-inst-mark { border: 1px solid var(--lt-border); box-shadow: none; }
.lt-orbit .lt-ico { background: none; }
.lt-orbit .lt-final { background: var(--lt-card); }
.lt-orbit .lt-stats dd { background: none; color: var(--lt-fg); }

/* ── Lumen (paling ringan) ────────────────────────────────────────────────
 * Tanpa layer latar tetap, tanpa animasi, tanpa filter/blur, tanpa bayangan bercahaya.
 * Satu-satunya dekorasi: pola titik statis di hero (dua gradien, digambar sekali). */
body.lt-lumen {
  --lt-radius: 14px;
  --lt-bg: #fafafa; --lt-fg: #111827; --lt-muted: #4b5563; --lt-card: #ffffff; --lt-border: #e5e7eb;
  --lt-a1: #4f46e5; --lt-a2: #0ea5e9; --lt-glow: transparent; --lt-on-accent: #ffffff; --lt-dot: #d4d4d8;
}
:root[data-theme="dark"] body.lt-lumen {
  --lt-bg: #0b0d12; --lt-fg: #f3f4f6; --lt-muted: #9ca3af; --lt-card: #12151c; --lt-border: #232733;
  --lt-a1: #818cf8; --lt-a2: #38bdf8; --lt-on-accent: #0b0d12; --lt-dot: #262b36;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body.lt-lumen {
    --lt-bg: #0b0d12; --lt-fg: #f3f4f6; --lt-muted: #9ca3af; --lt-card: #12151c; --lt-border: #232733;
    --lt-a1: #818cf8; --lt-a2: #38bdf8; --lt-on-accent: #0b0d12; --lt-dot: #262b36;
  }
}
.lt-lumen .lt-bg { display: none; }
.lt-lumen .lt-hero { margin-top: 1rem; border-radius: calc(var(--lt-radius) + 10px);
  background: radial-gradient(ellipse 65% 75% at 50% 42%, transparent 0%, var(--lt-bg) 78%),
    radial-gradient(circle, var(--lt-dot) 1px, transparent 1.6px) 0 0 / 22px 22px; }
.lt-lumen .lt-pulse::after { display: none; }
.lt-lumen .lt-btn, .lt-lumen .lt-btn:hover { box-shadow: none; transform: none; }
.lt-lumen .lt-card, .lt-lumen .lt-inst { transition: border-color .15s ease; }
.lt-lumen .lt-card:hover, .lt-lumen .lt-inst:hover { transform: none; box-shadow: none; border-color: var(--lt-a1); }
.lt-lumen .lt-inst-mark, .lt-lumen .brand-mark { box-shadow: none; }
.lt-lumen .lt-stats dd { background: none; color: var(--lt-fg); }
.lt-lumen .lt-final { background: var(--lt-card); }

/* ── v1.13 jurnal unggulan (pilihan owner) ───────────────────────────────── */
.lt-featured { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.1rem; margin: 0 0 2.4rem; }
.lt-feat { position: relative; flex: 0 1 250px; display: grid; justify-items: center; gap: .35rem; padding: 2.2rem 1.2rem 1.4rem; color: var(--lt-fg);
  border-radius: var(--lt-radius); background: var(--lt-card); border: 1px solid color-mix(in srgb, var(--lt-a1) 45%, var(--lt-border));
  box-shadow: 0 18px 50px -30px var(--lt-glow); transition: transform .25s ease, box-shadow .25s ease; }
.lt-feat:hover { text-decoration: none; transform: translateY(-4px); box-shadow: 0 26px 60px -28px var(--lt-glow); }
.lt-feat h3 { margin: .5rem 0 0; font-family: var(--lt-font-head); font-size: 1.02rem; }
.lt-feat-inst { margin: 0; font-size: .86rem; }
.lt-feat-cover { width: 130px; height: auto; aspect-ratio: 3 / 4; object-fit: cover; border-radius: 12px; border: 1px solid var(--lt-border);
  box-shadow: 0 14px 30px -14px rgba(0, 0, 0, .45); }
.lt-feat-ph { display: grid; place-items: center; font-size: 2.4rem; font-weight: 800; color: var(--lt-on-accent); background: linear-gradient(135deg, var(--lt-a1), var(--lt-a2)); }
.lt-award { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); display: inline-flex; align-items: center; gap: .35rem; white-space: nowrap;
  padding: .32rem .8rem .32rem .55rem; border-radius: 999px; font-size: .74rem; font-weight: 700; letter-spacing: .02em;
  color: #3b2a00; background: linear-gradient(135deg, #fde68a, #f59e0b); box-shadow: 0 6px 18px -6px rgba(245, 158, 11, .7); }
.lt-award svg { width: 18px; height: 18px; fill: none; stroke: #7c4a03; stroke-width: 1.8; stroke-linejoin: round; }
.lt-award .lt-award-star { fill: #7c4a03; stroke: none; }

/* ── v1.13 blog ─────────────────────────────────────────────────────────── */
.lt-posts { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr)); text-align: left; }
.lt-posts-all { margin-bottom: 2rem; }
.lt-post { display: grid; grid-template-rows: auto 1fr; overflow: hidden; color: var(--lt-fg); border-radius: var(--lt-radius); background: var(--lt-card);
  border: 1px solid var(--lt-border); transition: transform .25s ease, border-color .25s ease; }
.lt-post:hover { text-decoration: none; transform: translateY(-3px); border-color: color-mix(in srgb, var(--lt-a1) 55%, var(--lt-border)); }
.lt-post img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; display: block; }
.lt-post-body { display: grid; gap: .35rem; align-content: start; padding: 1.1rem 1.2rem 1.3rem; }
.lt-post-body h3 { margin: 0; font-family: var(--lt-font-head); font-size: 1.08rem; line-height: 1.3; }
.lt-post-body p { margin: 0; font-size: .92rem; }
.lt-post-date { font-size: .74rem; letter-spacing: .06em; }
.lt-blog-head { padding-bottom: 0; }
.lt-article { max-width: 760px; margin: 0 auto; padding: clamp(2rem, 6vw, 3.5rem) 0 1rem; }
.lt-article-title { font-family: var(--lt-font-head); font-size: clamp(1.8rem, 4.5vw, 2.8rem); line-height: 1.12; letter-spacing: -.025em; margin: .3rem 0 .5rem; }
.lt-article-cover { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--lt-radius); margin: 1.4rem 0; border: 1px solid var(--lt-border); }
.lt-article-lead { font-size: 1.12rem; color: var(--lt-fg); }
.lt-prose { font-size: 1.04rem; line-height: 1.75; }
.lt-prose h2, .lt-prose h3, .lt-prose h4 { font-family: var(--lt-font-head); margin: 2rem 0 .6rem; line-height: 1.25; }
.lt-prose a { color: var(--lt-a1); text-decoration: underline; text-underline-offset: 3px; }
.lt-prose blockquote { margin: 1.4rem 0; padding: .4rem 1.2rem; border-left: 3px solid var(--lt-a1); color: var(--lt-muted); }
.lt-prose code { font-family: var(--mono); font-size: .9em; padding: .1rem .35rem; border-radius: 6px; background: var(--lt-card); border: 1px solid var(--lt-border); }

/* ── v1.13 login terpusat (IdP) ─────────────────────────────────────────── */
.idp { display: grid; place-items: center; padding: clamp(2.5rem, 8vw, 5rem) 0 3rem; }
.idp-card { width: min(440px, 100%); padding: clamp(1.4rem, 4vw, 2.2rem); border-radius: calc(var(--lt-radius) + 4px); background: var(--lt-card);
  border: 1px solid var(--lt-border); box-shadow: 0 30px 80px -40px var(--lt-glow); }
.idp-wide { width: min(620px, 100%); }
.idp-title { font-family: var(--lt-font-head); font-size: clamp(1.5rem, 4vw, 1.9rem); line-height: 1.15; letter-spacing: -.02em; margin: .2rem 0 .5rem; }
.idp-sub { margin: 0 0 1.2rem; }
.idp-form { display: grid; gap: .9rem; }
.idp-form .btn { justify-content: center; }
.idp-foot { margin: 1.2rem 0 0; text-align: center; font-size: .9rem; }
.idp-foot a, .idp-card a:not(.btn):not(.idp-portal) { color: var(--lt-a1); }
.idp-error { margin: 0 0 1rem; padding: .65rem .85rem; border-radius: 10px; font-size: .9rem; color: #b91c1c; background: rgba(239, 68, 68, .1); border: 1px solid rgba(239, 68, 68, .35); }
.idp-note { margin: 0 0 1rem; padding: .65rem .85rem; border-radius: 10px; font-size: .9rem; background: color-mix(in srgb, var(--lt-a1) 10%, transparent); border: 1px solid color-mix(in srgb, var(--lt-a1) 30%, transparent); }
.idp-portals { display: grid; gap: .7rem; }
.idp-portal { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: .9rem; align-items: center; padding: .9rem 1rem; color: var(--lt-fg);
  border-radius: 14px; border: 1px solid var(--lt-border); background: color-mix(in srgb, var(--lt-bg) 40%, transparent); transition: border-color .2s ease; }
.idp-portal:hover { text-decoration: none; border-color: var(--lt-a1); }
.idp-portal .lt-inst-mark { width: 42px; height: 42px; margin: 0; font-size: 1.05rem; }
.idp-portal-text { display: grid; gap: .15rem; min-width: 0; font-size: .86rem; }
.idp-portal-text b { font-size: .98rem; }
.idp-roles { display: flex; flex-wrap: wrap; gap: .3rem; margin-top: .15rem; }
.idp-roles span { padding: .05rem .5rem; border-radius: 999px; font-size: .72rem; border: 1px solid var(--lt-border); color: var(--lt-muted); }
@media (max-width: 520px) { .idp-portal { grid-template-columns: auto minmax(0, 1fr); } .idp-portal .lt-go { grid-column: 2; } }

/* ── aksesibilitas ────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .lt-bg *, .lt-bg *::before, .lt-pulse::after { animation: none !important; }
  .lt-card, .lt-inst, .lt-btn { transition: none; }
}
/* HP & tablet: latar statis (hemat baterai), hanya titik "live" yang berdenyut. */
@media (max-width: 900px), (pointer: coarse) {
  .lt-bg span, .lt-bg span::before, .lt-bg i { animation: none !important; will-change: auto; }
}
@media (max-width: 640px) {
  .lt-orbit .lt-rings i { top: 260px; }
  .lt-cta .btn { flex: 1 1 100%; justify-content: center; }
  .lt-badge { font-size: .72rem; padding: .35rem .8rem; }
}

/* v1.15 — kartu institusi unggulan: logo + jurnal unggulannya */
.lt-inst-logo { width: 56px; height: 56px; object-fit: contain; border-radius: 12px; background: #fff; padding: 4px; }
.lt-inst h3 a { color: inherit; }
.lt-inst-journals { list-style: none; margin: .2rem 0 .6rem; padding: 0; display: grid; gap: .3rem; justify-items: center; font-size: .85rem; }
.lt-inst-journals a { color: var(--lt-a1); }
.lt-inst a.lt-go { text-decoration: none; }

/* ── v1.18 Harga ─────────────────────────────────────────────────────────── */
.lt-price-lead { max-width: 60ch; margin: -.4rem auto 1.6rem; text-align: center; }
.lt-prices { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(250px, 100%), 1fr)); align-items: stretch; }
.lt-prices[data-count="1"] { max-width: 380px; margin-inline: auto; }
.lt-prices[data-count="2"] { max-width: 760px; margin-inline: auto; }
.lt-price { position: relative; display: flex; flex-direction: column; gap: .7rem; padding: 1.5rem 1.3rem 1.3rem; text-align: left;
  border: 1px solid var(--lt-border); border-radius: var(--lt-radius); background: var(--lt-card); transition: transform .25s, box-shadow .25s, border-color .25s; }
.lt-price:hover { transform: translateY(-4px); box-shadow: 0 24px 60px -30px var(--lt-glow); }
.lt-price.is-hot { border: 2px solid transparent;
  background: linear-gradient(var(--lt-card), var(--lt-card)) padding-box, linear-gradient(135deg, var(--lt-a1), var(--lt-a2)) border-box;
  box-shadow: 0 26px 60px -34px var(--lt-glow); }
.lt-price-badge { position: absolute; top: -.75rem; left: 50%; transform: translateX(-50%); white-space: nowrap; padding: .2rem .75rem; border-radius: 999px;
  font-size: .72rem; font-weight: 700; letter-spacing: .04em; color: var(--lt-on-accent); background: linear-gradient(120deg, var(--lt-a1), var(--lt-a2)); }
.lt-price-name { margin: 0; font-family: var(--lt-font-head); font-size: 1.1rem; }
.lt-price-amount { margin: 0; display: flex; flex-wrap: wrap; align-items: baseline; gap: .1rem .45rem; }
.lt-price-amount b { font-family: var(--lt-font-head); font-size: clamp(1.55rem, 3.2vw, 1.95rem); line-height: 1.1; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.lt-price-amount span { color: var(--lt-muted); font-size: .88rem; }
.lt-price-amount.is-contact b { background: linear-gradient(100deg, var(--lt-a1), var(--lt-a2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lt-price-amount.is-contact span { flex-basis: 100%; }
.lt-price-desc { margin: 0; font-size: .92rem; }
.lt-price-feat { list-style: none; margin: .2rem 0 .4rem; padding: .8rem 0 0; border-top: 1px solid var(--lt-border); display: grid; gap: .5rem; font-size: .92rem; flex: 1; align-content: start; }
.lt-price-feat li { position: relative; padding-left: 1.6rem; }
.lt-price-feat li small { display: block; color: var(--lt-muted); font-size: .78rem; }
.lt-price-feat li::before { content: ""; position: absolute; left: 0; top: .12rem; width: 1.05rem; height: 1.05rem; border-radius: 50%;
  background: color-mix(in srgb, var(--lt-a1) 18%, transparent) no-repeat center / .7rem; }
.lt-price-feat li.ok::before { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 6.2l2.3 2.3 4.7-5' fill='none' stroke='%2322c55e' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-color: color-mix(in srgb, #22c55e 16%, transparent); }
.lt-price-feat li.no { color: var(--lt-muted); }
.lt-price-feat li.no::before { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M3.5 3.5l5 5M8.5 3.5l-5 5' fill='none' stroke='%2394a3b8' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E"); background-color: color-mix(in srgb, #94a3b8 16%, transparent); }
.lt-price-cta { width: 100%; justify-content: center; text-align: center; }
.lt-price-note { text-align: center; margin-top: 1.2rem; }
/* Ponsel: kartu digeser horizontal (scroll-snap), kartu berikutnya mengintip. */
@media (max-width: 640px) {
  .lt-prices { display: flex; gap: .85rem; overflow-x: auto; scroll-snap-type: x mandatory; padding: .9rem 1rem 1rem; margin-inline: -1rem; scrollbar-width: none; max-width: none; }
  .lt-prices::-webkit-scrollbar { display: none; }
  .lt-price { flex: 0 0 84%; scroll-snap-align: center; }
  .lt-prices[data-count="1"] .lt-price { flex-basis: 100%; }
  .lt-price:hover { transform: none; }
}

/* ── v1.19 OTP, lupa sandi, langganan info ───────────────────────────────── */
.otp-input { font: 700 1.6rem/1.2 var(--mono, ui-monospace, monospace); letter-spacing: .5em; text-align: center; padding-left: .5em; }
.link-btn { border: 0; background: none; padding: 0; font: inherit; color: var(--lt-a1); cursor: pointer; text-decoration: underline; }
.idp-foot form, form.idp-foot { display: block; }
.lt-news { margin: 2.4rem auto 0; max-width: 560px; padding: 1.4rem; border-radius: var(--lt-radius); border: 1px solid var(--lt-border); background: var(--lt-card); text-align: center; }
.lt-news h3 { margin: 0 0 .35rem; font-family: var(--lt-font-head); font-size: 1.12rem; }
.lt-news p { margin: 0 0 1rem; }
.lt-news form { display: flex; gap: .5rem; flex-wrap: wrap; justify-content: center; }
.lt-news input[type=email] { flex: 1 1 15rem; min-width: 0; padding: .75rem 1rem; border-radius: 999px; border: 1px solid var(--lt-border); background: var(--lt-bg); color: var(--lt-fg); font: inherit; }
.lt-news .lt-btn { padding: .75rem 1.3rem; justify-content: center; text-align: center; }
.lt-news .hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
@media (max-width: 480px) { .lt-news form { flex-direction: column; } .lt-news input[type=email] { flex: none; width: 100%; } .lt-news .lt-btn { width: 100%; } }