:root {
  --bg: #06171a;
  --bg-2: #0a2226;
  --surface: #0d2b30;
  --line: rgba(255, 255, 255, 0.09);
  --text: #e9f4f2;
  --muted: #93b3b0;
  --accent: #c8f031;
  --accent-ink: #0b1c05;
  --water: #1fb5aa;
  --radius: 18px;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(31, 181, 170, 0.18), transparent 60%),
    radial-gradient(700px 400px at -10% 30%, rgba(200, 240, 49, 0.06), transparent 60%),
    var(--bg);
  background-attachment: fixed;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { line-height: 1.12; margin: 0; letter-spacing: -0.02em; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.wrap { width: min(1120px, 100% - 40px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: var(--accent-ink); padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

/* header */
.site-header { position: sticky; top: 0; z-index: 40; background: rgba(6, 23, 26, 0.72); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.bar { display: flex; align-items: center; gap: 24px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.wordmark { font-weight: 700; font-size: 1.2rem; letter-spacing: -0.03em; }
.us { color: var(--accent); }
.nav { margin-left: auto; display: flex; gap: 22px; }
.nav a { text-decoration: none; color: var(--muted); font-size: 0.95rem; font-weight: 500; transition: color 0.2s; }
.nav a:hover { color: var(--text); }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 24px; border-radius: 999px; border: 1px solid transparent; background: var(--accent); color: var(--accent-ink); font: 600 1rem/1 var(--font); text-decoration: none; cursor: pointer; transition: transform 0.15s, box-shadow 0.2s, background 0.2s; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -10px rgba(200, 240, 49, 0.55); }
.btn:active { transform: translateY(0); }
.btn-sm { padding: 10px 18px; font-size: 0.92rem; }
.btn-ghost { background: transparent; color: var(--text); border-color: rgba(255, 255, 255, 0.22); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.06); box-shadow: none; }
.btn-dark { background: var(--bg); color: var(--text); }
.btn-dark:hover { box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.6); }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.6; cursor: progress; transform: none; box-shadow: none; }

/* type helpers */
.eyebrow { font-size: 0.82rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--water); margin-bottom: 14px; }
.lead { color: var(--muted); font-size: clamp(1.05rem, 2.2vw, 1.2rem); max-width: 58ch; }

/* hero */
.hero { padding-block: clamp(48px, 9vw, 112px); overflow: hidden; }
.hero-grid { display: grid; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(2.7rem, 8vw, 5.2rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1; margin-bottom: 22px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lead { margin-bottom: 30px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 32px 0 0; }
.chips li { padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; font-size: 0.88rem; color: var(--muted); background: rgba(255, 255, 255, 0.03); }

.hero-visual { display: none; }
.rings { position: relative; width: min(100%, 460px); aspect-ratio: 1; margin-inline: auto; display: grid; place-items: center; }
.ring { position: absolute; border-radius: 50%; border: 1px solid rgba(31, 181, 170, 0.4); animation: ripple 5s ease-out infinite; }
.ring:nth-child(1) { inset: 30%; }
.ring:nth-child(2) { inset: 18%; animation-delay: 0.6s; border-color: rgba(31, 181, 170, 0.28); }
.ring:nth-child(3) { inset: 6%; animation-delay: 1.2s; border-color: rgba(31, 181, 170, 0.18); }
.ring:nth-child(4) { inset: -6%; animation-delay: 1.8s; border-color: rgba(31, 181, 170, 0.1); }
.rings-mark { position: relative; width: 34%; height: auto; filter: drop-shadow(0 20px 40px rgba(200, 240, 49, 0.25)); }
@keyframes ripple { 0% { transform: scale(0.94); opacity: 0.2; } 50% { opacity: 1; } 100% { transform: scale(1.04); opacity: 0.2; } }

/* sections */
.section { padding-block: clamp(56px, 8vw, 104px); }
.section-alt { background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.01)); border-block: 1px solid var(--line); }
.section-head { margin-bottom: 40px; }
.section-head h2, .loc-grid h2 { font-size: clamp(1.9rem, 4.6vw, 3rem); font-weight: 750; margin-bottom: 14px; }

.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(160deg, var(--surface), var(--bg-2)); transition: transform 0.25s, border-color 0.25s; }
.card:hover { transform: translateY(-4px); border-color: rgba(200, 240, 49, 0.35); }
.card h3 { font-size: 1.2rem; margin: 18px 0 8px; }
.card p { color: var(--muted); font-size: 0.98rem; }
.icon { width: 28px; height: 28px; fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* events */
.events { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.event { display: grid; gap: 4px; padding: 20px 22px; border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 14px; background: var(--surface); }
.event time { font-size: 0.82rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); }
.event h3 { font-size: 1.15rem; }
.event p { color: var(--muted); font-size: 0.98rem; }
.event-note { border-left-color: var(--water); color: var(--muted); }

/* steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); counter-reset: none; }
.steps li { padding: 26px; border-top: 1px solid var(--line); }
.step-no { font-size: 2.6rem; font-weight: 800; letter-spacing: -0.04em; color: transparent; -webkit-text-stroke: 1px var(--accent); }
.steps h3 { font-size: 1.2rem; margin: 10px 0 8px; }
.steps p { color: var(--muted); }

/* location + form */
.loc-grid { display: grid; gap: 40px; align-items: start; }
address { font-style: normal; font-size: 1.1rem; line-height: 1.7; margin: 8px 0 18px; }
.contact-line { color: var(--muted); margin-bottom: 26px; }
.contact-line a { color: var(--accent); }

.map { margin-top: 28px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; aspect-ratio: 4 / 3; background: var(--surface); }
.map iframe { width: 100%; height: 100%; border: 0; display: block; }

.form { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(160deg, var(--surface), var(--bg-2)); }
.form h3 { font-size: 1.35rem; margin-bottom: 8px; }
.form-note { color: var(--muted); font-size: 0.95rem; margin-bottom: 18px; }
.form label { display: block; margin: 14px 0 6px; font-size: 0.9rem; font-weight: 600; }
.opt { color: var(--muted); font-weight: 400; }
.form input, .form textarea { width: 100%; padding: 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--bg); color: var(--text); font: inherit; font-size: 16px; }
.form input:focus, .form textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(200, 240, 49, 0.18); }
.form textarea { resize: vertical; min-height: 84px; }
.form .btn { margin-top: 20px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-status { min-height: 1.5em; margin-top: 14px; font-size: 0.95rem; }
.form-status.ok { color: var(--accent); }
.form-status.err { color: #ff9b8a; }
.form-status a { color: inherit; font-weight: 600; }

/* faq */
.faq-wrap { max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); padding: 4px 0; }
.faq summary { cursor: pointer; padding: 18px 32px 18px 0; font-weight: 600; font-size: 1.08rem; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%); font-size: 1.5rem; color: var(--accent); transition: transform 0.2s; }
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { color: var(--muted); padding: 0 0 20px; max-width: 62ch; }

/* final cta */
.final { padding-block: clamp(40px, 6vw, 72px) clamp(64px, 9vw, 112px); }
.final-box { text-align: center; padding: clamp(40px, 7vw, 72px) 24px; border-radius: 28px; background: var(--accent); color: var(--accent-ink); }
.final-box h2 { font-size: clamp(2.2rem, 6vw, 3.8rem); font-weight: 800; letter-spacing: -0.04em; margin-bottom: 10px; }
.final-box p { font-size: 1.15rem; margin-bottom: 26px; opacity: 0.8; }

/* footer */
.site-footer { border-top: 1px solid var(--line); padding-block: 36px 100px; color: var(--muted); font-size: 0.92rem; }
.foot { display: grid; gap: 14px; justify-items: start; }
.foot .brand { color: var(--text); }
.foot a { color: var(--text); }
.copy { opacity: 0.7; }

/* 404 */
.not-found { min-height: 100vh; display: grid; place-content: center; justify-items: center; text-align: center; gap: 18px; }

/* floating button */
.fab { position: fixed; right: 16px; bottom: 16px; z-index: 50; display: inline-flex; align-items: center; gap: 8px; padding: 13px 18px; border-radius: 999px; background: var(--accent); color: var(--accent-ink); font-weight: 700; font-size: 0.95rem; text-decoration: none; box-shadow: 0 12px 30px -8px rgba(0, 0, 0, 0.6); transition: transform 0.15s; }
.fab:hover { transform: translateY(-2px); }
.fab svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* reveal on scroll (aktif hanya jika JS jalan) */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

@media (min-width: 880px) {
  .hero-grid { grid-template-columns: 1.15fr 0.85fr; }
  .hero-visual { display: block; }
  .loc-grid { grid-template-columns: 1fr 1fr; gap: 56px; }
  .foot { grid-template-columns: auto 1fr auto; align-items: center; gap: 28px; }
}
@media (max-width: 720px) {
  .nav { display: none; }
  .bar { justify-content: space-between; }
  .btn-sm { margin-left: auto; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .ring { animation: none; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card, .fab { transition: none; }
}