/* Showcase website 3D: satu panggung WebGL menempel di belakang tiga bab. Bidang warna rata per bab (docs/DESIGN.md 11.4):
   tanpa gradasi, tanpa kaca, tanpa grain, tanpa preloader. Lima ukuran huruf: display, h2, lead 20, isi 17, kecil 16. */
@font-face { font-family: "Hanken Grotesk"; font-weight: 400 500; font-display: swap; src: url("../../assets/fonts/hanken-grotesk-latin.woff2") format("woff2"); }
:root { --font: "Hanken Grotesk", system-ui, sans-serif; --display: "Fraunces", Georgia, serif; --taupe: #5E5148; --paper-ink: #F4EFE8; }
* { box-sizing: border-box; }
html { scroll-behavior: auto; }
body { margin: 0; background: var(--taupe); color: var(--paper-ink); font-family: var(--font); font-size: 17px; -webkit-font-smoothing: antialiased; }

.progress-bar { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 1001; background: #743318; transform: scaleX(0); transform-origin: left; }

/* Navigasi bab: daftar teks 16px di kiri bawah panggung, bab aktif bergaris bawah 2px */
.chapnav { position: fixed; left: 5vw; bottom: 12px; z-index: 900; display: flex; gap: 4px 20px; padding: 0 14px; background: #DCD0BC; transition: opacity .4s ease, visibility .4s ease; }
.chapnav button { min-height: 44px; padding: 0 2px; border: 0; background: none; color: #1F241E; font: 600 16px var(--font); cursor: pointer; border-bottom: 2px solid transparent; }
.chapnav button[aria-current] { border-bottom-color: currentColor; }
.chapnav button:focus-visible { outline: 3px solid #743318; outline-offset: 2px; }
.at-outro .chapnav { opacity: 0; visibility: hidden; }

/* Panggung */
.story { position: relative; }
.stage {
  position: sticky; top: 0; height: 100vh; height: 100svh; margin-bottom: -100vh; margin-bottom: -100svh; overflow: hidden;
  background: #CBBBA2 url("poster-1.webp") center / cover no-repeat; transition: background-color .5s ease;
}
.has3d .stage { background-image: none; }
.stage[data-ch="1"] { background-color: #BDBAB3; }
.stage[data-ch="2"] { background-color: #B7C0C6; }
.stage canvas { display: block; width: 100%; height: 100%; opacity: 0; transition: opacity .6s ease; touch-action: pan-y; }
.has3d .stage canvas { opacity: 1; }
.stage[data-ch="1"] canvas { cursor: grab; }
.stage.dragging canvas { cursor: grabbing; }
/* Pergantian bab: bidang warna menyapu naik, memuat nama brand berikutnya */
.curtain {
  position: absolute; inset: 0; z-index: 3; display: grid; place-content: center; background: var(--taupe); color: var(--paper-ink);
  clip-path: inset(100% 0 0 0); transition: clip-path .48s cubic-bezier(.7, 0, .3, 1);
}
.curtain.in { clip-path: inset(0 0 0 0); }
.curtain.out { clip-path: inset(0 0 100% 0); }
.curtain.reset { transition: none; }
.curtain-t { font-family: var(--display); font-size: clamp(32px, 4.3vw, 58px); font-weight: 600; letter-spacing: -.02em; }

/* Bab dan panel: teks di atas kertas rata, tidak pernah langsung di atas objek */
.chapter { position: relative; pointer-events: none; }
.chapter[data-theme="kraft"] { --ink: #1F241E; --accent: #743318; --paper: #DCD0BC; --chbg: #CBBBA2; }
.chapter[data-theme="beton"] { --ink: #1C1C1C; --accent: #7A2C10; --paper: #D3D0C9; --chbg: #BDBAB3; }
.chapter[data-theme="kabut"] { --ink: #13213B; --accent: #5E3C0C; --paper: #D0D6DA; --chbg: #B7C0C6; }
.panel { position: relative; z-index: 1; min-height: 100vh; min-height: 100svh; display: flex; align-items: flex-end; padding: 96px 5vw 72px; color: var(--ink); }
.copy { pointer-events: auto; width: min(41.6%, 560px); padding: 32px 36px 34px; background: var(--paper); }
.panel h1, .panel h2 { margin: 0 0 16px; font-family: var(--display); font-weight: 600; letter-spacing: -.025em; line-height: 1.02; text-wrap: balance; }
.panel h1 { font-size: clamp(32px, 3.4vw, 50px); }
.ch-poster + .panel .copy { width: min(58%, 820px); }
.panel h2 { font-size: clamp(32px, 3.6vw, 48px); }
.panel p { margin: 0 0 14px; font-size: 17px; line-height: 1.6; color: var(--ink); }
.panel p.small, .small { font-size: 16px !important; }
.hint { display: block; margin-top: 8px; font-size: 16px; font-weight: 600; color: var(--accent); }

/* judul naik dari balik topeng; isi muncul bertahap */
.mask { display: block; overflow: hidden; padding-bottom: .1em; margin-bottom: -.1em; }
.mask > span { display: block; transform: translateY(105%); transition: transform 1s cubic-bezier(.2, .75, .1, 1); }
.panel.on .mask > span { transform: none; }
.copy > :not(h1):not(h2) { opacity: 0; transform: translateY(16px); transition: opacity .7s ease .2s, transform .7s ease .2s; }
.panel.on .copy > * { opacity: 1; transform: none; }

/* Fakta: baris biasa, angka menyatu dengan kalimat */
.facts, .stats { display: grid; gap: 6px; margin: 18px 0 0; padding: 0; list-style: none; }
.facts li, .stats li { display: flex; gap: 10px; align-items: baseline; font-size: 17px; }
.facts b, .stats b { font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.facts span, .stats span { font-size: 17px; }
.swatch { display: inline-block; width: .42em; height: .42em; vertical-align: .1em; margin-right: 12px; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .25); }
.spec { display: grid; grid-template-columns: auto 1fr; gap: 6px 18px; margin: 16px 0 0; font-size: 17px; }
.spec dd { margin: 0; font-weight: 700; }
.chips { display: grid; grid-template-columns: repeat(6, 44px); gap: 8px; margin: 16px 0 12px; }
.chip { width: 44px; height: 44px; border-radius: 50%; border: 0; cursor: pointer; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .25); }
.chip[aria-pressed="true"] { box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .25), 0 0 0 3px var(--paper), 0 0 0 5px var(--ink); }
.chip:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.price { margin: 12px 0 0; font-size: 20px; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.price small { font-size: 16px; font-weight: 400; color: var(--ink); }
.warna-list { display: none; }

/* Penutup: panel taupe sama dengan pita demo */
.outro { position: relative; z-index: 2; min-height: 100vh; min-height: 100svh; display: flex; flex-direction: column; justify-content: center; background: var(--taupe); color: var(--paper-ink); padding: 120px 5vw 90px; }
.outro h2 { margin: 0 0 18px; max-width: 820px; font-family: var(--display); font-size: clamp(32px, 3.6vw, 48px); font-weight: 600; letter-spacing: -.025em; line-height: 1.05; text-wrap: balance; }
.outro p { max-width: 620px; font-size: 17px; line-height: 1.6; margin: 0 0 28px; }
.outro-actions { display: flex; flex-wrap: wrap; }
.btn3d { display: inline-flex; align-items: center; min-height: 48px; padding: 0 24px; font-weight: 700; font-size: 17px; text-decoration: none; background: var(--paper-ink); color: #2B2019; border: 0; margin: 0 10px 10px 0; }
.btn3d:hover { background: #fff; }
.btn3d.ghost { background: transparent; color: inherit; box-shadow: inset 0 0 0 2px currentColor; }
.btn3d:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }
.related { margin-top: 40px; display: flex; flex-wrap: wrap; gap: 0 22px; font-size: 16px; align-items: center; }
.related a { color: var(--paper-ink); display: inline-flex; align-items: center; min-height: 44px; }
.outro small { display: block; margin-top: 20px; max-width: 760px; font-size: 16px; line-height: 1.55; }
footer { padding: 18px; text-align: center; font-size: 16px; color: var(--paper-ink); background: var(--taupe); }

/* Mode gambar diam (reduced-motion / tanpa WebGL): tanpa panggung, satu poster per bab, teks mengalir biasa */
.ch-poster { display: none; }
.no3d .stage, .no3d .chapnav { display: none; }
.no3d .chapter { background: var(--chbg); pointer-events: auto; }
.no3d .ch-poster { display: block; width: 100%; height: 62vh; object-fit: cover; }
.no3d .panel { min-height: 0; padding: 32px 5vw; }
.no3d .copy { width: min(100%, 640px); padding: 0; background: none; }
.no3d .chips, .no3d .chip-note { display: none; }
.no3d .warna-list { display: block; }

@media (max-width: 1023px) { .copy, .ch-poster + .panel .copy { width: min(78%, 640px); } }
@media (max-width: 1023px) { .copy, .ch-poster + .panel .copy { width: min(78%, 640px); } }
@media (max-width: 760px) {
  .chapnav { display: none; }
  .panel { padding: 0; align-items: flex-end; }
  .copy { width: 100%; max-height: 46svh; overflow: auto; padding: 20px 18px 24px; }
  .ch-poster + .panel .copy { width: 100%; }
  .outro { padding: 80px 16px 64px; }
  .no3d .panel { padding: 24px 16px; }
}
@media (prefers-reduced-motion: reduce) {
  .mask > span, .copy > :not(h1):not(h2) { transform: none !important; opacity: 1 !important; transition: none !important; }
  .curtain { transition: none; }
}

/* ---- Kopi Rindang 3D: khusus halaman ini ---- */
.stage { background-color: #CFD8C4; background-image: url("poster-1.webp"); }
.chapter { --ink: #2B2019; --accent: #7A3E1D; --paper: #E6DAC6; --chbg: #CFD8C4; }
.topbar { position: fixed; top: 0; left: 0; right: 0; z-index: 950; display: flex; align-items: center; gap: 24px; min-height: 56px; padding: 0 5vw; background: #F4EFE8; color: #2B2019; }
.topbar a { color: inherit; text-decoration: none; display: inline-flex; align-items: center; min-height: 44px; font-weight: 600; font-size: 16px; }
.topbar .brand { font: 600 20px "Fraunces", Georgia, serif; letter-spacing: -.01em; margin-right: auto; }
.topbar .brand span { color: #7A3E1D; }
.topbar nav { display: flex; gap: 22px; }
.topbar .topcta { padding: 0 18px; background: #2B2019; color: #F4EFE8; }
.topbar a:focus-visible { outline: 3px solid #7A3E1D; outline-offset: 2px; }
body:has(.demo-bar) .topbar { top: 48px; }
.panel { padding-top: 140px; padding-bottom: 84px; }
.copy { width: min(46%, 640px); }
.panel h1, .panel h2 { font-size: clamp(36px, 4.6vw, 68px); line-height: 1.06; }
.kicker { margin: 0 0 12px !important; font-size: 16px !important; font-weight: 700; color: var(--accent) !important; letter-spacing: .02em; }
.ui-card { display: grid; gap: 4px; margin: 16px 0 0; padding: 14px 16px; background: #FBF7F0; box-shadow: inset 0 0 0 1px rgba(43, 32, 25, .18); font-size: 16px; }
.ui-card b { font-size: 17px; }
.ui-card i { display: block; height: 6px; margin-top: 8px; background: #E6DAC6; position: relative; }
.ui-card i::after { content: ""; position: absolute; inset: 0 auto 0 0; width: var(--v); background: #7A3E1D; }
.steps { position: fixed; left: 50%; bottom: 12px; transform: translateX(-50%); z-index: 900; display: flex; gap: 4px; padding: 0 8px; background: #F4EFE8; transition: opacity .4s ease, visibility .4s ease; }
.steps button { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 12px; border: 0; background: none; color: #2B2019; font: 600 16px var(--font); cursor: pointer; border-bottom: 2px solid transparent; }
.steps button b { display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; box-shadow: inset 0 0 0 1.5px currentColor; font-size: 16px; }
.steps button[aria-current] { border-bottom-color: #7A3E1D; color: #7A3E1D; }
.steps button:focus-visible { outline: 3px solid #7A3E1D; outline-offset: 2px; }
.at-outro .steps, .no3d .steps { opacity: 0; visibility: hidden; }
.no3d .topbar { position: static; }
@media (max-width: 1023px) { .steps button span { display: none; } }
@media (max-width: 760px) {
  .topbar { padding: 0 16px; }
  body:has(.demo-bar) .topbar { top: 52px; }
  .topbar nav { display: none; }
  .copy { width: 100%; }
  .panel h1, .panel h2 { font-size: 28px; }
  .steps { top: 60px; bottom: auto; padding: 0 4px; }
  body:has(.demo-bar) .steps { top: 112px; }
}

/* ---- Penjelasan alur ---- */
.alur { position: relative; z-index: 2; background: #E6DAC6; color: #2B2019; padding: 96px 5vw; }
.alur h2 { margin: 0 0 16px; max-width: 820px; font-family: var(--display); font-size: clamp(30px, 3.4vw, 46px); font-weight: 600; letter-spacing: -.025em; line-height: 1.05; text-wrap: balance; }
.alur .lead { max-width: 760px; margin: 0 0 32px; font-size: 20px; line-height: 1.55; }
.alur-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin: 0; padding: 0; list-style: none; }
.alur-list li { display: grid; gap: 8px; align-content: start; padding: 20px 22px; background: #FBF7F0; box-shadow: inset 0 0 0 1px rgba(43, 32, 25, .14); }
.alur-list b { font-size: 18px; color: #7A3E1D; }
.alur-list span { font-size: 17px; line-height: 1.55; }
.alur .small { margin: 28px 0 0; font-size: 16px; }
@media (max-width: 760px) { .alur { padding: 72px 16px; } .alur .lead { font-size: 18px; } }