:root {
  --teal: #0d9488;
  --teal-dark: #0f766e;
  --teal-light: #14b8a6;
  --navy: #0f172a;
  --slate: #64748b;
  --amber: #f59e0b;
  --bg: #ffffff;
  --bg-soft: #f0fdfa;
  --border: #e2e8f0;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(2, 44, 34, 0.08);
  --shadow-lg: 0 20px 50px rgba(2, 44, 34, 0.14);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Poppins", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--navy); line-height: 1.6; background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: 999px; font-weight: 600; font-size: 15px;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  border: 2px solid transparent; cursor: pointer; white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--teal); color: #fff; box-shadow: 0 8px 20px rgba(13,148,136,.3); }
.btn-primary:hover { background: var(--teal-dark); }
.btn-outline { border-color: var(--teal); color: var(--teal); }
.btn-outline:hover { background: var(--teal); color: #fff; }
.btn-ghost { border-color: rgba(255,255,255,.6); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-block { width: 100%; }
.btn-sm { padding: 9px 18px; font-size: 14px; }

/* ---------- HEADER ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--border);
  transition: box-shadow .2s ease;
}
.site-header.scrolled { box-shadow: 0 6px 20px rgba(2,44,34,.08); }
.header-inner { display: flex; align-items: center; gap: 22px; height: 70px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.brand-mark { height: 40px; width: auto; border-radius: 11px; }
.brand-text strong { color: var(--teal); }
.nav { display: flex; align-items: center; gap: 22px; margin-left: auto; }
.nav a { font-size: 15px; font-weight: 500; color: var(--slate); transition: color .15s; }
.nav a:hover { color: var(--teal); }
.btn-header { margin-left: 6px; }

.menu-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.menu-toggle span { width: 24px; height: 2.5px; background: var(--navy); border-radius: 2px; transition: .25s; }
.menu-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------- HERO ---------- */
.hero {
  background: radial-gradient(1100px 550px at 50% -10%, #14b8a6 0%, #0f766e 45%, #0b3b33 100%);
  color: #fff; text-align: center;
}
.hero-inner { max-width: 820px; margin: 0 auto; padding: 76px 20px 88px; }
.badge {
  display: inline-block; background: var(--amber); color: #7c2d12; font-weight: 700; font-size: 13px;
  padding: 7px 16px; border-radius: 999px; letter-spacing: .5px; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(30px, 4.6vw, 50px); line-height: 1.15; font-weight: 800; margin-bottom: 22px; }
.hero-promo {
  display: inline-flex; align-items: center; flex-wrap: wrap; gap: 12px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.25);
  padding: 14px 24px; border-radius: 16px; font-weight: 800; font-size: 18px;
  letter-spacing: .5px; margin-bottom: 22px; backdrop-filter: blur(6px);
}
.hero-promo-plus { color: var(--amber); font-size: 22px; }
.lead { font-size: 17px; color: rgba(255,255,255,.9); margin-bottom: 28px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

/* ---------- SECTIONS ---------- */
section { padding: 68px 0; }
section[id] { scroll-margin-top: 78px; }
.section-head { text-align: center; max-width: 600px; margin: 0 auto 44px; }
.eyebrow { display: inline-block; color: var(--teal); font-weight: 700; font-size: 13px; text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 10px; }
.section-head h2 { font-size: clamp(26px, 3.6vw, 38px); font-weight: 800; line-height: 1.2; margin-bottom: 12px; }
.section-head p { color: var(--slate); }

/* ---------- PAKET ---------- */
.paket { background: #fbfdfd; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.card {
  position: relative; background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 26px; box-shadow: var(--shadow); display: flex; flex-direction: column; text-align: center;
  transition: transform .2s, box-shadow .2s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.card-featured { border: 2px solid var(--teal); box-shadow: 0 16px 40px rgba(13,148,136,.18); }
.card-ribbon {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--amber); color: #7c2d12; font-weight: 700; font-size: 12px; letter-spacing: .5px;
  padding: 6px 16px; border-radius: 999px; white-space: nowrap;
}
.card-speed { display: block; font-size: 26px; font-weight: 800; margin-bottom: 10px; }
.card-price { font-size: 38px; font-weight: 800; color: var(--teal); margin-bottom: 18px; }
.card-price .curr { font-size: 20px; font-weight: 600; }
.card-price small { font-size: 14px; font-weight: 500; color: var(--slate); }
.card-features { list-style: none; margin: 0 auto 24px; display: grid; gap: 10px; text-align: left; }
.card-features li { position: relative; padding-left: 28px; color: #334155; font-size: 15px; }
.card-features li::before { content: "✔"; position: absolute; left: 0; color: var(--teal); font-weight: 700; }

/* ---------- KEUNGGULAN ---------- */
.keunggulan { background: #fff; }
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.feature { background: var(--bg-soft); border: 1px solid #d9f3ee; border-radius: var(--radius); padding: 26px 22px; text-align: center; }
.feature-icon { display: inline-flex; width: 52px; height: 52px; align-items: center; justify-content: center; font-size: 26px; background: #fff; border-radius: 14px; margin-bottom: 14px; box-shadow: var(--shadow); }
.feature h3 { font-size: 16px; margin-bottom: 6px; }
.feature p { color: var(--slate); font-size: 14px; }

/* ---------- FAQ ---------- */
.faq { background: #fbfdfd; }
.faq-inner { max-width: 720px; }
.faq-list { display: grid; gap: 14px; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 4px 22px; }
.faq-item summary { cursor: pointer; font-weight: 600; padding: 16px 0; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::after { content: "+"; font-size: 22px; color: var(--teal); font-weight: 700; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { color: var(--slate); padding: 0 0 16px; font-size: 15px; }

/* ---------- FOOTER ---------- */
.site-footer { background: #0b1220; color: #cbd5e1; padding: 52px 0 0; }
.footer-inner { display: grid; grid-template-columns: 1.6fr 1fr; gap: 36px; padding-bottom: 36px; }
.footer-logo { height: 56px; width: auto; margin-bottom: 14px; }
.footer-brand p { font-size: 14.5px; max-width: 340px; }
.footer-col h4 { color: #fff; margin-bottom: 12px; font-size: 16px; }
.footer-col p { margin-bottom: 8px; font-size: 14.5px; }
.footer-col a:hover { color: var(--teal-light); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 18px 20px; text-align: center; font-size: 13.5px; color: #94a3b8; }

/* ---------- FLOATING WHATSAPP ---------- */
.wa-float {
  position: fixed; right: 22px; bottom: 22px; z-index: 999;
  width: 60px; height: 60px; border-radius: 50%;
  background: #25D366; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(37, 211, 102, .5); transition: transform .2s ease;
}
.wa-float:hover { transform: scale(1.1); }
.wa-float svg { width: 34px; height: 34px; fill: #fff; }
.wa-float::before {
  content: ""; position: absolute; inset: 0; border-radius: 50%;
  background: #25D366; z-index: -1; animation: waPulse 2s ease-out infinite;
}
@keyframes waPulse {
  0% { transform: scale(1); opacity: .55; }
  70%, 100% { transform: scale(1.75); opacity: 0; }
}

/* ---------- RESPONSIVE ---------- */
/* Tablet & layar sedang: menu jadi hamburger, kartu paket 1 kolom */
@media (max-width: 900px) {
  .nav {
    position: fixed; inset: 70px 0 auto 0; flex-direction: column; gap: 0; z-index: 49;
    background: #fff; border-bottom: 1px solid var(--border); padding: 10px 20px 20px;
    transform: translateY(-140%); transition: transform .25s ease; box-shadow: 0 20px 40px rgba(0,0,0,.1);
  }
  .nav.open { transform: translateY(0); }
  .nav a { padding: 12px 0; font-size: 16px; width: 100%; border-bottom: 1px solid var(--border); }
  .nav a:last-child { border-bottom: 0; }
  .btn-header { display: none; }
  .menu-toggle { display: flex; margin-left: auto; }
  .cards { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .features { grid-template-columns: 1fr 1fr; }
}

/* HP: semua menumpuk 1 kolom, tombol full-width, padding lebih rapat */
@media (max-width: 600px) {
  section { padding: 52px 0; }
  .hero-inner { padding: 56px 16px 64px; }
  .hero h1 { font-size: 29px; }
  .hero-promo { font-size: 15px; padding: 12px 16px; gap: 8px; }
  .hero-cta { width: 100%; }
  .hero-cta .btn { width: 100%; }
  .features { grid-template-columns: 1fr; }
  .card { padding: 26px 20px; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .wa-float { right: 16px; bottom: 16px; width: 56px; height: 56px; }
  .wa-float svg { width: 30px; height: 30px; }
}