@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@900&family=JetBrains+Mono:ital,wght@0,400;0,700;1,400&family=Bodoni+Moda:ital,opsz,wght@0,6..96,400;1,6..96,400;1,6..96,700&family=Dela+Gothic+One&family=Oswald:wght@700&family=Anton&family=Bebas+Neue&family=Playfair+Display:ital,wght@1,900&family=Space+Grotesk:wght@700&family=Abril+Fatface&family=Righteous&display=block');

/* ─── TOKENS ─── */
:root {
  --bg:       #0c0c0c;
  --fg:       #e8e4dc;
  --mute:     #4e4c46;
  --dim:      #252420;
  --border:   #1c1b18;
  --amber:    #c8a96e;
  --amber-d:  #6e5320;
  --amber-bg: #c8a96e;   /* cover inversion bg */
  --amber-fg: #1a1306;   /* text on amber bg */
  --cond:     'Barlow Condensed', sans-serif;
  --serif:    'Bodoni Moda', serif;
  --mono:     "Leto Regular", sans-serif;
  --stamp:    'Dela Gothic One', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%; width: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  -webkit-font-smoothing: antialiased;
}

/* ══════════════════════════════════════
   FIXED UI
══════════════════════════════════════ */

#d-back {
  position: fixed;
  top: 1.5rem;
  left: 2.5rem;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mute);
  text-decoration: none;
  z-index: 200;
  transition: color 0.2s;
  white-space: nowrap;
  display: flex;
  align-items: baseline;
  gap: 0.5em;
}
#d-back::before {
  content: '←';
  color: var(--amber);
  letter-spacing: 0;
}
#d-back:hover { color: var(--fg); }

#d-pos {
  position: fixed; top: 1.5rem; right: 2.5rem;
  display: flex; align-items: baseline; gap: 0.4rem;
  font-size: 0.65rem; letter-spacing: 0.1em; z-index: 200;
}
#d-num   { color: var(--amber); }
#d-sep   { color: var(--dim); }
#d-total { color: var(--mute); }
#d-name  { color: var(--mute); text-transform: uppercase; margin-left: 0.6rem; }

#d-hint {
  position: fixed; bottom: 1.75rem; left: 50%;
  transform: translateX(-50%);
  font-size: 0.62rem; letter-spacing: 0.2em; color: var(--mute);
  text-transform: uppercase; pointer-events: none; z-index: 200;
  animation: blink 2.8s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:.2} 50%{opacity:.55} }

#d-progress {
  position: fixed; bottom: 0; left: 0;
  height: 1px; background: var(--amber-d); width: 0%; z-index: 200;
}

/* ══════════════════════════════════════
   TRACK + STEPS — geometry set by JS
══════════════════════════════════════ */

#d-track { will-change: transform; }

.d-step { overflow: hidden; }

/* ══════════════════════════════════════
   PANEL BASE — JS sets position/size
══════════════════════════════════════ */

.d-panel {
  position: absolute;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;           /* bottom-left anchor by default */
  padding: 2.5rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}


/* ══════════════════════════════════════
   COVER PANEL  (Stedelijk + Klim)
   — huge condensed title bleeds right
   — content anchored bottom-left
══════════════════════════════════════ */

.d-panel--cover {
  background: var(--bg);
}

/* amber inversion — chapters 03 & 05 */
.d-panel--amber {
  background: var(--amber-bg);
}
.d-panel--amber .d-ch    { color: var(--amber-fg); opacity: 0.5; }
.d-panel--amber .d-bleed { color: var(--amber-fg); }
.d-panel--amber .d-cover-sub { color: var(--amber-fg); opacity: 0.6; }

.d-ch {
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--mute);
  text-transform: uppercase;
  margin-bottom: 1rem;
  position: relative; z-index: 1;
}

/* Bleed title — Stedelijk's core move */
.d-bleed {
  font-family: var(--cycle-font, var(--cond));
  font-style: var(--cycle-style, normal);
  font-size: clamp(5rem, 22vw, 20rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--cycle-color, var(--fg));
  white-space: nowrap;
  /* intentionally overflows panel width — clipped by overflow:hidden */
  position: relative; z-index: 1;
  margin-bottom: 1.5rem;
}

/* ── Effect 1: paint/ink distress via SVG filter ── */
.d-bleed {
  filter: url(#paint-distress);
}

.d-cover-sub {
  font-size: clamp(0.75rem, 1.2vw, 0.9rem);
  color: var(--mute);
  letter-spacing: 0.04em;
  line-height: 1.5;
  position: relative; z-index: 1;
}

/* subtle glow behind cover content */
.d-panel--cover::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 60%; height: 60%;
  background: radial-gradient(circle at 20% 80%, rgba(200,169,110,0.07) 0%, transparent 70%);
  pointer-events: none;
}
.d-panel--amber::before { display: none; }

/* Effect 3: vertical editorial label (writing-mode) */
.d-panel--cover::after {
  content: 'DESIGN · 23AG';
  position: absolute;
  right: 1.8rem; top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--mono);
  font-size: 0.52rem;
  letter-spacing: 0.22em;
  color: var(--border);
  text-transform: uppercase;
  pointer-events: none;
  z-index: 2;
}
.d-panel--amber::after {
  color: rgba(26,19,6,0.25);
}

/* ══════════════════════════════════════
   BANDS PANEL  (Stedelijk — text rows)
══════════════════════════════════════ */

.d-panel--bands {
  justify-content: center;
  padding: 3rem 0 3rem 2.5rem;
  gap: 0;
}

.d-bands-label {
  font-family: "Union Regular", arial, helvetica, sans-serif;
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--amber-d);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  padding-right: 2.5rem;
}

.d-bands {
  list-style: none;
  width: 100%;
  margin-bottom: 2rem;
  overflow: visible;
}

.d-bands li {
  font-family: "Union Regular", arial, helvetica, sans-serif;
  font-size: clamp(1rem, 2.4vw, 1.6rem);
  line-height: 1;
  color: var(--mute);
  padding: 0.85em 2.5rem 0.85em 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.6em;
  transition: color 0.15s;
  letter-spacing: -0.01em;
  transform-origin: left center;
}
.d-bands li:first-child { border-top: 1px solid var(--border); }
.d-bands li:hover { color: var(--fg); }

.d-band--accent {
  color: var(--fg) !important;
}

/* chain variant — with arrows */
.d-bands--chain li { color: var(--mute); }
.d-arr {
  color: var(--amber-d);
  font-family: var(--mono);
  font-size: 0.75em;
  flex-shrink: 0;
  margin: 0 0.3em;
}

/* stat variant — big number + label */
.d-bands--stat li { gap: 1rem; align-items: baseline; }
.d-stat-num {
  font-family: var(--cond);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  color: var(--amber);
  line-height: 1;
  flex-shrink: 0;
  min-width: 2.5ch;
}

/* inline tag (Dev / Design / Consulting) */
.d-tag-inline {
  font-size: 0.58em;
  letter-spacing: 0.12em;
  color: var(--amber);
  text-transform: uppercase;
  border: 1px solid var(--amber-d);
  padding: 0.15em 0.5em;
  line-height: 1;
  flex-shrink: 0;
}

.d-bands-note {
  font-family: "Union Regular", arial, helvetica, sans-serif;
  font-size: clamp(0.72rem, 1.1vw, 0.82rem);
  line-height: 1.85;
  color: var(--mute);
  max-width: 52ch;
  padding-right: 2.5rem;
}
.d-bands-note em { color: var(--amber); font-style: normal; }

/* ══════════════════════════════════════
   QUOTE PANEL  (Lusion bottom-anchor + Vercel glow)
══════════════════════════════════════ */

.d-panel--quote {
  justify-content: flex-end;
  padding: 2.5rem;
}

/* radial glow behind quote */
.d-panel--quote::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 80%; height: 80%;
  background: radial-gradient(ellipse at 15% 85%, rgba(200,169,110,0.09) 0%, transparent 65%);
  pointer-events: none;
}

.d-q-label {
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--amber-d);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  position: relative; z-index: 1;
}

.d-q {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  font-weight: 400;
  font-style: italic;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--fg);
  margin-bottom: 1.5rem;
  position: relative; z-index: 1;
}

.d-q-body {
  font-size: clamp(0.72rem, 1.1vw, 0.82rem);
  line-height: 1.85;
  color: var(--mute);
  max-width: 44ch;
  position: relative; z-index: 1;
}
.d-q-body em { color: var(--amber); font-style: normal; }

/* final quote — slightly larger */
.d-panel--quote-final .d-q {
  font-size: clamp(2rem, 4.5vw, 3.8rem);
}

/* ══════════════════════════════════════
   P3 — CENTRED BIG SERIF  (ch01)
══════════════════════════════════════ */

.d-panel--q-center {
  justify-content: center;
  align-items: center;
  text-align: center;
}

.d-qc {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(2.8rem, 6.5vw, 5.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--fg);
  max-width: 16ch;
}

/* ══════════════════════════════════════
   P3 — NUM SPLIT  (ch02): giant "0" left, text right
══════════════════════════════════════ */

.d-panel--q-numsplit {
  flex-direction: row;
  align-items: stretch;
  padding: 0;
}

.d-qns-num {
  flex: 0 0 42%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--cond);
  font-size: clamp(12rem, 30vw, 24rem);
  font-weight: 900;
  line-height: 1;
  color: var(--amber);
  border-right: 1px solid var(--border);
  letter-spacing: -0.05em;
  user-select: none;
}

.d-qns-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2.5rem;
}

/* ══════════════════════════════════════
   P3 — HALVES  (ch03): dark left / amber right
══════════════════════════════════════ */

.d-panel--q-halves {
  flex-direction: row;
  align-items: stretch;
  padding: 0;
}

.d-qh-left {
  flex: 0 0 55%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2.5rem;
  border-right: 1px solid var(--border);
}

.d-qh-right {
  flex: 1;
  background: var(--amber-bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

.d-qh-stat {
  font-family: var(--cond);
  font-size: clamp(6rem, 16vw, 13rem);
  font-weight: 900;
  line-height: 1;
  color: var(--amber-fg);
  opacity: 0.9;
}

.d-qh-desc {
  font-family: var(--mono);
  font-size: clamp(0.7rem, 1.1vw, 0.85rem);
  color: var(--amber-fg);
  opacity: 0.6;
  line-height: 1.6;
  text-align: center;
  letter-spacing: 0.03em;
  margin-top: 0.5rem;
}

/* ══════════════════════════════════════
   P3 — INDEX  (ch04): book-index list
══════════════════════════════════════ */

.d-panel--q-index {
  justify-content: center;
  padding: 3rem 2.5rem;
}

.d-index-list {
  list-style: none;
  margin: 1.5rem 0 2rem;
  width: 100%;
}

.d-index-list li {
  display: grid;
  grid-template-columns: 2.5rem 1fr 1fr;
  align-items: baseline;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border);
  gap: 1rem;
}
.d-index-list li:first-child { border-top: 1px solid var(--border); }

.d-idx-num {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--amber-d);
  letter-spacing: 0.05em;
}

.d-idx-name {
  font-family: var(--cond);
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 900;
  color: var(--fg);
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.d-idx-desc {
  font-family: var(--serif);
  font-size: clamp(0.9rem, 1.6vw, 1.2rem);
  font-style: italic;
  color: var(--mute);
  text-align: right;
}

/* ══════════════════════════════════════
   P3 — TERMINAL  (ch05): mono output
══════════════════════════════════════ */

.d-panel--q-terminal {
  justify-content: center;
  background: #060604;
}

.d-term-block {
  padding: 0;
  max-width: 60ch;
}

.d-term-prompt {
  font-family: var(--mono);
  font-size: clamp(0.85rem, 1.4vw, 1rem);
  color: var(--amber);
  margin-bottom: 0.3rem;
}

.d-term-out {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 3.5vw, 2.8rem);
  color: var(--fg);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.d-term-blank { height: 1em; }

.d-term-comment {
  font-family: var(--mono);
  font-size: clamp(0.72rem, 1.1vw, 0.85rem);
  color: var(--mute);
  line-height: 1.7;
}

.d-term-cursor {
  display: inline-block;
  animation: cursor-blink 1s step-end infinite;
  color: var(--amber);
}
@keyframes cursor-blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* ══════════════════════════════════════
   P3 — FINALE  (ch06): RED STAMP
══════════════════════════════════════ */

.d-panel--finale {
  background: #c0130e;
  justify-content: center;
  align-items: flex-start;
  padding: 3rem 2.5rem;
  gap: 1.5rem;
}

.d-finale-pre {
  font-family: var(--mono);
  font-size: clamp(0.7rem, 1.1vw, 0.85rem);
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.d-finale-stamp {
  font-family: var(--stamp);
  font-size: clamp(4rem, 13vw, 11rem);
  line-height: 0.92;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: #fff;
  max-width: 12ch;
}

/* ══════════════════════════════════════
   CHAPTER FLASH  (number fades on step change)
══════════════════════════════════════ */

#d-flash {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--cond);
  font-size: 52vw;
  font-weight: 900;
  line-height: 1;
  color: var(--fg);
  opacity: 0;
  pointer-events: none;
  z-index: 150;
  user-select: none;
  letter-spacing: -0.03em;
}

/* ══════════════════════════════════════
   DEPTH INDICATOR  (right edge, fills per panel within step)
══════════════════════════════════════ */

#d-depth {
  position: fixed;
  right: 0; top: 0;
  width: 1px;
  height: 100%;
  background: var(--border);
  z-index: 200;
}

#d-depth-fill {
  position: absolute;
  bottom: 0; left: 0;
  width: 100%;
  height: 0%;
  background: var(--amber);
  transition: height 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ══════════════════════════════════════
   OVERVIEW TEXT
══════════════════════════════════════ */

#d-ov-text {
  position: fixed; inset: 0;
  display: flex; flex-direction: column;
  justify-content: center; align-items: center;
  text-align: center;
  padding: 4rem 5vw;
  background: transparent;
  transform: scale(0);
  transform-origin: center center;
  opacity: 0;
  pointer-events: none; z-index: 300;
}
.d-ov-pre {
  font-family: var(--mono);
  font-size: clamp(0.7rem, 1.1vw, 0.85rem);
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
}
.d-ov-stamp {
  font-family: var(--stamp);
  font-size: clamp(4rem, 14vw, 12rem);
  line-height: 0.9;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  /* Effect 2: gradient clip — dimensional red */
  background: linear-gradient(135deg, #ff3322 0%, #c0130e 35%, #8a0000 65%, #c0130e 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  max-width: 12ch;
}
.d-ov-back {
  position: absolute;
  top: 2.5rem; left: 5vw;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
}

/* ══════════════════════════════════════
   MOBILE
══════════════════════════════════════ */

@media (max-width: 600px) {
  .d-bleed { font-size: clamp(3.5rem, 18vw, 6rem); }
  .d-panel { padding: 1.5rem; }
  .d-panel--bands { padding: 2rem 0 2rem 1.5rem; }
  .d-bands li { font-size: clamp(0.85rem, 4vw, 1.1rem); padding-right: 1.5rem; }
}

/* ── FOOTER ── */
#d-footer {
  display: flex;
  gap: 2rem;
  padding: 1.2rem 2.5rem;
  border-top: 1px solid var(--border);
}

#d-footer a {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  color: var(--mute);
  text-decoration: none;
}

#d-footer a:hover { color: var(--fg); }