/* GRAMMAR slide-deck — Ardi Wibowo. Black and Tan. Tidak ada transisi antar slide (cut). Radius 0. */
:root {
  --canvas: #0B0B0B;
  --ink: #F2EEE6;
  --tan: #D8B98C;
  --sans: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, Menlo, monospace;
  --ease-out: cubic-bezier(.23, 1, .32, 1);
  --pad: clamp(24px, 6vw, 96px);
}
* { box-sizing: border-box; }
html, body { height: 100%; }
html { scroll-behavior: auto; }
body {
  margin: 0; background: var(--canvas); color: var(--ink);
  font-family: var(--sans); font-size: 18px; line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}
em { font-style: normal; color: var(--tan); }

/* Deck = scroll container dengan snap keras */
.deck {
  height: 100dvh; overflow-y: auto; overscroll-behavior: contain;
  scroll-snap-type: y mandatory;
  scrollbar-width: none;
}
.deck::-webkit-scrollbar { display: none; }
.slide {
  height: 100dvh; scroll-snap-align: start; scroll-snap-stop: always;
  padding: var(--pad); display: grid; align-content: center;
  /* TIDAK ada transition/animation di slide: perpindahan = cut */
}

/* Tipografi: hanya 3 ukuran di seluruh dek */
h1, h2, .statement, .number { margin: 0; font-weight: 700; letter-spacing: -.02em; line-height: 1.02; }
h1 { font-size: clamp(2.4rem, 6vw, 5.4rem); max-width: 18ch; }
h2 { font-size: clamp(2rem, 4.6vw, 4rem); max-width: 20ch; margin-bottom: 32px; }
.statement { font-size: clamp(2.2rem, 5.4vw, 5rem); max-width: 22ch; }
.slide__sub { font-size: clamp(1.05rem, 1.5vw, 1.35rem); max-width: 42ch; margin: 24px 0 0; opacity: .85; }
.slide__hint { position: absolute; left: var(--pad); bottom: 28px; margin: 0; font-family: var(--mono); font-size: 12px; opacity: .5; }
.slide--title { position: relative; }

/* Foto: satu-satunya gambar di dek */
.slide--photo { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 48px; align-items: center; }
.photo { margin: 0; aspect-ratio: 4 / 5; max-height: calc(100dvh - 2 * var(--pad)); background: #1a1a1a; }
.photo img { width: 100%; height: 100%; object-fit: cover; display: block; filter: grayscale(1) contrast(1.05); }
.slide__aside p { font-size: clamp(1.1rem, 1.7vw, 1.5rem); max-width: 34ch; margin: 0; }

/* Angka */
.number { font-size: clamp(6rem, 22vw, 20rem); color: var(--tan); font-variant-numeric: tabular-nums; }
.number__label { font-family: var(--mono); font-size: 13px; max-width: 46ch; opacity: .7; margin: 12px 0 0; }

/* Daftar modul: bukan kartu */
.modules { list-style: none; margin: 0; padding: 0; max-width: 60ch; }
.modules li {
  display: grid; grid-template-columns: 3ch 1fr; gap: 20px; align-items: baseline;
  padding: 18px 0; border-top: 1px solid rgba(242, 238, 230, .16); font-size: clamp(1.1rem, 1.8vw, 1.6rem);
}
.modules li:last-child { border-bottom: 1px solid rgba(242, 238, 230, .16); }
.modules li span { font-family: var(--mono); font-size: 13px; color: var(--tan); }

/* Kutipan: 3 baris maks */
.slide--quote blockquote { margin: 0; max-width: 46ch; }
.slide--quote p { font-size: clamp(1.4rem, 2.6vw, 2.4rem); line-height: 1.25; margin: 0 0 20px; font-weight: 500; }
.slide--quote footer { font-family: var(--mono); font-size: 13px; opacity: .7; }

/* CTA slide: color block tan, satu tombol */
.slide--cta { background: var(--tan); color: var(--canvas); }
.slide--cta .slide__sub { opacity: .85; }
.btn {
  display: inline-block; margin-top: 36px; justify-self: start;
  background: var(--canvas); color: var(--ink); text-decoration: none;
  font-family: var(--mono); font-size: 13px; text-transform: uppercase; letter-spacing: .08em; padding: 16px 24px;
  transition: transform 160ms var(--ease-out);
}
.btn:active { transform: scale(.97); }
@media (hover:hover) and (pointer:fine) { .btn:hover { transform: translateY(-1px); } }

/* HUD & nav: mono kecil, tetap di tempat */
.hud {
  position: fixed; inset: 0 auto auto 0; width: 100%; display: flex; justify-content: space-between;
  padding: 20px var(--pad); font-family: var(--mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase;
  pointer-events: none; z-index: 10; mix-blend-mode: difference; color: #fff;
}
.deck-nav { position: fixed; right: var(--pad); bottom: 24px; display: flex; gap: 8px; z-index: 10; mix-blend-mode: difference; }
.deck-nav button {
  width: 44px; height: 44px; font: 24px/1 var(--sans); color: var(--ink); background: transparent;
  border: 1px solid rgba(255,255,255,.45); color: #fff; cursor: pointer; transition: transform 160ms var(--ease-out);
}
.deck-nav button:active { transform: scale(.97); }
.deck-nav button:focus-visible { outline: 2px solid var(--tan); outline-offset: 2px; }

/* Mobile */
@media (max-width: 720px) {
  .slide--photo { grid-template-columns: 1fr; gap: 20px; align-content: start; padding-top: 72px; }
  .photo { max-height: 48dvh; aspect-ratio: auto; height: 48dvh; }
}
@media (prefers-reduced-motion: reduce) {
  .deck { scroll-snap-type: none; }
  .btn, .deck-nav button { transition: none; }
}


/* ===== Logo mark di HUD =====
   Satu garis naik yang terbaca sebagai monogram AW sekaligus grafik naik.
   Ikut warna teks lewat currentColor; di slide tan HUD-nya sudah dibalik
   jadi mark-nya ikut tanpa aturan tambahan. */
.hud__brand{display:inline-flex;align-items:center;gap:.5rem}
.hud__mark{width:26px;height:16px;flex:none;overflow:visible}
@media (max-width:720px){ .hud__mark{width:22px;height:13px} }


/* ===== HUD di slide berlatar terang =====
   mix-blend-mode: difference memang otomatis, tapi di atas tan #D8B98C
   hasilnya biru gelap; kontrasnya lolos (5:1) tetapi itu warna keempat
   yang tidak ada di palet. Di slide ber-data-hud="ink" blend dimatikan
   dan dipakai tinta langsung: 10:1 dan tetap Black and Tan. */
body.hud-ink .hud,
body.hud-ink .deck-nav { mix-blend-mode: normal; }
body.hud-ink .hud { color: var(--canvas); }
body.hud-ink .deck-nav button { color: var(--canvas); border-color: rgba(11, 11, 11, .38); }
body.hud-ink .deck-nav button:focus-visible { outline-color: var(--canvas); }