/* avibook.id: tema buku yang sama dengan studio dan album (kertas krem, tinta cokelat, emas, sage). */
:root {
  --latar: #f6f3ee;
  --kertas: #f3eee3;
  --mat: #fbf8f1;
  --tinta: #3d372f;
  --redup: #6f6457;
  --garis: #e3d8c3;
  --emas: #b48d4f;
  --emas-lembut: rgb(180 141 79 / 45%);
  --emas-tua: #7a5a2a;
  --sage: #aab59f;
  --rose: #b3475d;
  --wa: #1f8f4e;
  --serif: 'Cormorant Garamond', 'Cormorant', Georgia, 'Times New Roman', serif;
  --sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --bayang: 0 2px 4px rgb(60 45 20 / 8%), 0 12px 32px rgb(60 45 20 / 12%);
  --tekstur:
    radial-gradient(120% 80% at 20% 10%, rgb(255 253 246 / 70%), transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.45 0 0 0 0 0.38 0 0 0 0 0.28 0 0 0 0.08 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--latar);
  color: var(--tinta);
  font: 17px/1.65 var(--sans);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--emas-tua); }
h1, h2, h3 { font-family: var(--serif); font-weight: 500; line-height: 1.15; margin: 0 0 12px; font-variant-numeric: lining-nums; }
h1 { font-size: clamp(2.3rem, 7.5vw, 3.6rem); font-style: italic; }
h2 { font-size: clamp(1.9rem, 6vw, 2.7rem); font-style: italic; }
h3 { font-size: 1.45rem; font-weight: 600; font-style: italic; }
p { margin: 0 0 14px; }
.redup { color: var(--redup); }
.kecil { font-size: 0.95rem; }
.tengah { text-align: center; }
.lead { font-size: 1.15rem; }
.kicker {
  margin: 0 0 8px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--emas-tua);
}
.ornamen {
  width: min(62%, 240px);
  height: 16px;
  margin: 6px 0 18px;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='16' viewBox='0 0 18 16'%3E%3Cpath d='M9 1 L13.5 8 L9 15 L4.5 8 Z' fill='none' stroke='%23b48d4f' stroke-width='1'/%3E%3Cpath d='M9 5 L11 8 L9 11 L7 8 Z' fill='%23b48d4f'/%3E%3C/svg%3E") center / 18px 16px no-repeat,
    linear-gradient(var(--emas-lembut), var(--emas-lembut)) left center / calc(50% - 16px) 1px no-repeat,
    linear-gradient(var(--emas-lembut), var(--emas-lembut)) right center / calc(50% - 16px) 1px no-repeat;
}

/* ---------- tombol ---------- */
.tombol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 26px;
  border: 1px solid var(--emas-lembut);
  border-radius: 999px;
  background: transparent;
  color: var(--tinta);
  font-weight: 600;
  text-decoration: none;
  text-align: center;
}
.tombol:hover { background: rgb(180 141 79 / 10%); }
.tombol.utama {
  border-color: var(--emas);
  background: var(--tinta);
  color: var(--mat);
  font-family: var(--serif);
  font-size: 1.3rem;
  font-style: italic;
}
.tombol.utama:hover { background: #2b2620; }
.tombol-baris { display: flex; flex-wrap: wrap; gap: 10px; margin: 6px 0 14px; }

/* ---------- kepala ---------- */
.atas {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  background: rgb(246 243 238 / 92%);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--garis);
}
.merek { display: inline-flex; align-items: center; gap: 8px; color: var(--tinta); font-family: var(--serif); font-size: 1.45rem; font-weight: 600; font-style: italic; text-decoration: none; }
.merek img { border-radius: 8px; }
.atas nav { display: flex; align-items: center; gap: 14px; }
.atas nav a { color: var(--tinta); text-decoration: none; font-weight: 600; font-size: 0.95rem; }
.masuk-studio { padding: 8px 14px; border: 1px solid var(--emas-lembut); border-radius: 999px; }

/* ---------- bagian ---------- */
.bagian, .pembuka, .penutup { padding: 56px 20px; }
.bagian > *, .penutup > * { max-width: 760px; margin-left: auto; margin-right: auto; }
.kertas { background: var(--kertas) var(--tekstur); }
.masalah { text-align: center; }
.masalah p { font-size: 1.1rem; }

/* pembuka */
.pembuka {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 28px;
  align-items: center;
  max-width: none;
  padding-top: 40px;
}
.pembuka-isi { position: relative; z-index: 1; max-width: 560px; }
.pembuka h1 { margin-bottom: 10px; }
.hiasan { position: absolute; inset: 0; pointer-events: none; }
.sobek { position: absolute; top: 0; right: 0; width: 28%; height: 220px; filter: drop-shadow(-1px 1px 1.5px rgb(60 45 20 / 18%)); }
.sobek .sage { fill: var(--sage); }
.sobek .tepi { fill: none; stroke: #fbf8f0; stroke-width: 3.5; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
@media (min-width: 860px) {
  .pembuka { grid-template-columns: 1.2fr 0.8fr; padding: 72px max(40px, calc(50% - 520px)); }
}

/* bingkai HP */
.hp {
  position: relative;
  margin: 0 auto;
  width: min(100%, 270px);
  padding: 10px;
  border-radius: 34px;
  background: #1e1b18;
  box-shadow: var(--bayang), inset 0 0 0 2px #3a342e;
}
.hp img { border-radius: 26px; width: 100%; }
.hp figcaption { margin-top: 10px; text-align: center; color: var(--redup); font-size: 0.95rem; }
.hp:has(figcaption) { padding-bottom: 12px; background: transparent; box-shadow: none; }
.hp:has(figcaption) img { border: 10px solid #1e1b18; border-radius: 34px; box-shadow: var(--bayang); }
.hp-pembuka { z-index: 1; transform: rotate(2deg); }
.galeri-hp {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: min(72%, 250px);
  gap: 18px;
  max-width: 1100px !important;
  overflow-x: auto;
  padding: 8px 4px 16px;
  scroll-snap-type: x mandatory;
}
.galeri-hp .hp { width: 100%; scroll-snap-align: center; }
@media (min-width: 1000px) { .galeri-hp { grid-auto-flow: row; grid-template-columns: repeat(4, 1fr); overflow: visible; } }

/* langkah */
.langkah, .keunggulan { list-style: none; padding: 0; display: grid; gap: 22px; margin-top: 22px; }
.langkah li, .keunggulan li { display: flex; gap: 16px; align-items: flex-start; }
.langkah h3, .keunggulan h3 { margin-bottom: 4px; }
.langkah p, .keunggulan p { margin: 0; color: var(--redup); }
.ikon-langkah, .keunggulan li > span {
  flex: none;
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border: 1px solid var(--emas-lembut);
  border-radius: 50%;
  background: var(--mat);
  font-size: 1.4rem;
}
@media (min-width: 760px) { .keunggulan { grid-template-columns: 1fr 1fr; } }

/* kartu */
.dua-kolom { display: grid; gap: 16px; margin: 22px auto; }
@media (min-width: 700px) { .dua-kolom { grid-template-columns: 1fr 1fr; } }
.kartu {
  padding: 22px 20px;
  border: 1px solid var(--garis);
  border-radius: 16px;
  background: var(--mat);
  box-shadow: var(--bayang);
}
.kartu-ucapan { background: #fff7f3; border-color: #efd8cf; }
.kartu-ucapan h3 { color: var(--rose); }
.daftar { margin: 0; padding-left: 20px; }
.daftar li { margin-bottom: 6px; }
.daftar.centang { list-style: none; padding: 0; }
.daftar.centang li { position: relative; padding-left: 28px; }
.daftar.centang li::before { content: '✓'; position: absolute; left: 0; color: var(--wa); font-weight: 700; }

/* harga */
.paket { display: grid; gap: 18px; margin: 24px auto; align-items: start; }
@media (min-width: 720px) { .paket { grid-template-columns: 1fr 1fr; } }
.kartu-paket {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 26px 22px 22px;
  border: 1px solid var(--garis);
  border-radius: 18px;
  background: var(--mat);
  box-shadow: var(--bayang);
}
.kartu-paket .tombol { margin-top: 14px; }
.kartu-paket.unggulan { border: 2px solid var(--emas); }
.pita {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  padding: 4px 14px;
  border-radius: 999px;
  background: var(--emas);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  white-space: nowrap;
}
.harga { margin: 0; font-family: var(--serif); font-size: 3rem; font-weight: 600; line-height: 1; font-variant-numeric: lining-nums; }
.harga span { font-size: 1.6rem; }
.hemat { margin: 2px 0 6px; color: var(--wa); font-weight: 700; }

/* alur setelah membeli */
.alur { margin: 20px auto 0; padding-left: 22px; display: grid; gap: 10px; font-size: 1.05rem; }

/* tanya jawab */
.tanya { display: grid; gap: 10px; margin-top: 20px; }
.tanya details { border: 1px solid var(--garis); border-radius: 12px; background: var(--mat); }
.tanya summary { min-height: 52px; padding: 14px 44px 14px 16px; font-weight: 600; cursor: pointer; list-style: none; position: relative; }
.tanya summary::-webkit-details-marker { display: none; }
.tanya summary::after { content: '+'; position: absolute; right: 16px; top: 12px; color: var(--emas); font-size: 1.4rem; }
.tanya details[open] summary::after { content: '–'; }
.tanya details p { margin: 0; padding: 0 16px 16px; color: var(--redup); }

/* penutup */
.penutup { text-align: center; }
.penutup .ornamen { margin-left: auto; margin-right: auto; }
.penutup .tombol-baris { justify-content: center; }

/* kaki */
.kaki { padding: 32px 20px 96px; text-align: center; border-top: 1px solid var(--garis); }
.merek-kaki { display: inline-flex; align-items: center; gap: 8px; font-family: var(--serif); font-size: 1.3rem; font-style: italic; font-weight: 600; }
.merek-kaki img { border-radius: 6px; }
.kaki nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 18px; margin: 8px 0 12px; }

/* tombol WA melayang */
.wa-melayang {
  position: fixed;
  right: 16px;
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: 20;
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--wa);
  color: #fff;
  box-shadow: 0 6px 20px rgb(0 0 0 / 25%);
}

/* halaman teks (privasi, syarat) */
.teks { max-width: 720px; margin: 0 auto; padding: 40px 20px 80px; }
.teks h1 { font-size: 2.4rem; }
.teks h2 { font-size: 1.6rem; margin-top: 28px; }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }