/* site.css — halaman publik (landing, katalog, pengajuan, cek) */
.wrap { width: min(1160px, 100% - 3rem); margin-inline: auto; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 30; background: rgba(243, 245, 248, .92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line-soft); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 1.5rem; }
.nav { display: flex; align-items: center; gap: .25rem; }
.nav a:not(.btn) { color: var(--text); text-decoration: none; font-weight: 500; font-size: .94rem; padding: .5rem .8rem; border-radius: var(--r-md); }
.nav a:not(.btn):hover, .nav a[aria-current="page"] { background: #fff; color: var(--ink); }
.nav .btn { margin-left: .5rem; }
.nav-toggle { display: none; background: #fff; border: 1px solid var(--line); border-radius: var(--r-md); width: 44px; height: 44px; cursor: pointer; color: var(--ink); }

/* Hero */
.hero { padding: clamp(3rem, 7vw, 6rem) 0 clamp(2.5rem, 5vw, 4rem); }
.hero-top { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: clamp(2rem, 6vw, 5rem); align-items: end; }
.hero h1 { font: 500 clamp(2.4rem, 5vw, 4.1rem)/1.04 var(--serif); letter-spacing: -.02em; margin: 0; max-width: 16ch; }
.hero-lead { font-size: 1.08rem; color: var(--muted); max-width: 46ch; margin-bottom: 1.5rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; }

/* Anatomi nomor ISBN */
.anatomy { margin: clamp(2.5rem, 6vw, 4.5rem) 0 0; padding: clamp(1.5rem, 3vw, 2.5rem) 0 0; border-top: 1px solid var(--ink); }
.anatomy-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.anatomy-head h2 { font: 500 1.05rem/1.3 var(--sans); margin: 0; }
.anatomy-head span { color: var(--muted); font-size: .88rem; }
.isbn-row { display: flex; align-items: flex-start; flex-wrap: wrap; gap: 0 .15em; font: 400 clamp(2.1rem, 6.6vw, 5.6rem)/1 var(--serif); font-variant-numeric: lining-nums tabular-nums; letter-spacing: -.02em; color: var(--ink); }
.seg { display: flex; flex-direction: column; animation: seg-in .7s cubic-bezier(.2, .7, .2, 1) both; animation-delay: calc(var(--i) * 110ms + 150ms); }
.dash { color: #9aa5b5; animation: seg-in .7s both; animation-delay: calc(var(--i) * 110ms + 150ms); }
.seg-digits { padding-bottom: .12em; }
.seg-bracket { height: 9px; border: 1.5px solid var(--ink); border-top: 0; border-radius: 0 0 4px 4px; opacity: .9; }
.seg-cap { font: 500 clamp(.72rem, 1.2vw, .9rem)/1.3 var(--sans); letter-spacing: 0; color: var(--muted); margin-top: .65rem; max-width: 11ch; }
.seg.cd { color: var(--stamp); }
.seg.cd .seg-bracket { border-color: var(--stamp); }
.seg.cd .seg-cap { color: var(--stamp); }
@keyframes seg-in { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

.hero-stats { display: flex; flex-wrap: wrap; gap: .5rem 2.25rem; margin-top: 2.5rem; color: var(--muted); font-size: .94rem; }
.hero-stats strong { color: var(--ink); font: 500 1.35rem/1 var(--serif); margin-right: .35rem; font-variant-numeric: lining-nums; }

/* Seksi */
.section { padding: clamp(3rem, 6vw, 5rem) 0; }
.section-white { background: #fff; border-block: 1px solid var(--line-soft); }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 2rem; }
.section-head h2 { font: 500 clamp(1.7rem, 3vw, 2.4rem)/1.1 var(--serif); margin: 0; letter-spacing: -.015em; }
.section-head p { margin: .5rem 0 0; color: var(--muted); max-width: 52ch; }

/* Pengecek */
.cek { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(1.5rem, 5vw, 4rem); align-items: center; }
.cek h2 { font: 500 clamp(1.7rem, 3vw, 2.4rem)/1.1 var(--serif); margin: 0 0 .6rem; letter-spacing: -.015em; }
.cek-form { display: flex; gap: .6rem; }
.cek-form .input { font-size: 1.05rem; }

/* Alur */
.alur { list-style: none; counter-reset: alur; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--ink); }
.alur li { counter-increment: alur; padding: 1.5rem 1.5rem 0 0; position: relative; }
.alur li::before { content: counter(alur); display: block; font: 500 2.4rem/1 var(--serif); color: var(--brand); margin-bottom: 1rem; font-variant-numeric: lining-nums; }
.alur h3 { font: 600 1.02rem/1.3 var(--sans); margin-bottom: .4rem; }
.alur p { color: var(--muted); font-size: .92rem; margin: 0; }

/* Daftar katalog */
.daftar { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.daftar li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .35rem 2rem; padding: 1.1rem 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.daftar .judul, .daftar .meta { display: block; }
.daftar .judul { font: 500 1.25rem/1.3 var(--serif); color: var(--ink); text-wrap: balance; }
.daftar .meta { color: var(--muted); font-size: .9rem; }
.daftar .isbn { font-size: 1.15rem; color: var(--ink); justify-self: end; display: inline-flex; align-items: center; gap: .4rem; }
.daftar .meta-kanan { grid-column: 2; justify-self: end; font-size: .85rem; color: var(--muted); }

/* FAQ */
.faq { border-top: 1px solid var(--ink); max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 1.15rem 2.5rem 1.15rem 0; font-weight: 600; color: var(--ink); position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: .5rem; top: 50%; width: 9px; height: 9px; border-right: 2px solid var(--ink); border-bottom: 2px solid var(--ink); transform: translateY(-70%) rotate(45deg); transition: transform .2s; }
.faq details[open] summary::after { transform: translateY(-30%) rotate(225deg); }
.faq .jawab { padding: 0 2.5rem 1.25rem 0; color: var(--muted); }

/* Ajakan */
.ajakan { background: var(--ink); color: #d6deea; padding: clamp(2.5rem, 5vw, 4rem) 0; }
.ajakan .wrap { display: flex; align-items: center; justify-content: space-between; gap: 2rem; flex-wrap: wrap; }
.ajakan h2 { font: 500 clamp(1.6rem, 3vw, 2.3rem)/1.15 var(--serif); color: #fff; margin: 0 0 .5rem; }
.ajakan p { margin: 0; max-width: 52ch; }
.ajakan .btn-primary { background: #fff; color: var(--ink); }
.ajakan .btn-primary:hover { background: var(--brand-50); }

/* Footer */
.site-footer { background: var(--ink); color: #a9b5c7; padding: 3rem 0 2rem; border-top: 1px solid rgba(255,255,255,.08); font-size: .92rem; }
.ajakan + .site-footer { border-top: 1px solid rgba(255,255,255,.1); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2.5rem; }
.site-footer h3 { color: #fff; font: 600 .95rem/1.3 var(--sans); margin-bottom: .75rem; }
.site-footer a { color: #d6deea; text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .45rem; }
.footer-brand { font: 500 1.4rem/1.2 var(--serif); color: #fff; margin-bottom: .6rem; }
.footer-bawah { margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid rgba(255,255,255,.1); display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: .85rem; }

/* Halaman dalam */
.page-head { padding: clamp(2.5rem, 5vw, 4rem) 0 1.5rem; }
.page-head h1 { font: 500 clamp(2rem, 4vw, 3rem)/1.08 var(--serif); letter-spacing: -.02em; margin: 0 0 .6rem; }
.page-head p { color: var(--muted); max-width: 58ch; margin: 0; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: clamp(1.25rem, 3vw, 2rem); }
.filter { display: grid; grid-template-columns: 1.6fr 1fr 1fr auto; gap: .6rem; align-items: end; margin-bottom: 1.75rem; }
.filter .field { margin: 0; }
.layout-form { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 2rem; align-items: start; padding-bottom: 4rem; }
.catatan-samping h2 { font: 600 1rem/1.3 var(--sans); }
.catatan-samping ul { margin: 0 0 1.25rem; padding-left: 1.1rem; color: var(--muted); font-size: .92rem; }
.catatan-samping li { margin-bottom: .45rem; }
.fieldset-judul { font: 500 1.2rem/1.2 var(--serif); color: var(--ink); margin: 1.75rem 0 1rem; padding-top: 1.25rem; border-top: 1px solid var(--line-soft); }
.fieldset-judul:first-child { margin-top: 0; padding-top: 0; border: 0; }

.hasil { padding-bottom: 4rem; }
.hasil-kartu { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: clamp(1.5rem, 3vw, 2.25rem); }
.hasil-kartu .isbn { font-size: clamp(1.8rem, 4vw, 2.8rem); display: block; margin: .75rem 0 1rem; color: var(--ink); }
.hasil-kartu dl { display: grid; grid-template-columns: max-content 1fr; gap: .5rem 1.5rem; margin: 1.5rem 0 0; font-size: .95rem; }
.hasil-kartu dt { color: var(--muted); }
.hasil-kartu dd { margin: 0; color: var(--ink); }
.sukses-kode { font: 500 2.4rem/1 var(--serif); letter-spacing: .12em; color: var(--ink); margin: .5rem 0 1rem; font-variant-numeric: lining-nums; }

@media (max-width: 900px) {
  .hero-top, .cek, .layout-form { grid-template-columns: 1fr; }
  .hero h1 { max-width: 20ch; }
  .alur { grid-template-columns: 1fr 1fr; row-gap: 2rem; }
  .filter { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .wrap { width: min(1160px, 100% - 2rem); }
  .nav-toggle { display: inline-grid; place-items: center; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 72px; background: var(--paper); border-bottom: 1px solid var(--line); padding: .75rem 1rem 1rem; flex-direction: column; align-items: stretch; }
  .nav.terbuka { display: flex; }
  .nav a:not(.btn) { padding: .8rem; }
  .nav .btn { margin: .5rem 0 0; }
  .dash { display: none; }
  .isbn-row { gap: 1.25rem 1.5rem; }
  .seg-cap { max-width: none; }
  .daftar li { grid-template-columns: 1fr; }
  .daftar .isbn, .daftar .meta-kanan { justify-self: start; grid-column: 1; }
  .cek-form { flex-direction: column; }
  .alur { grid-template-columns: 1fr; }
  .filter { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hasil-kartu dl { grid-template-columns: 1fr; gap: .1rem; }
  .hasil-kartu dd { margin-bottom: .75rem; }
}