/* Dumpster Memories — component styles. Uses tokens.css vars only. */

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

body {
  padding: 0;
  background: #08090b;
  overflow-x: hidden;
  font-family: 'Spectral', var(--font-body);
}

::selection { background: rgba(244,182,64,.3); color: #fff; }

/* ---------- Story-specific palette (derived, moonlit railside mood) ---------- */
:root {
  --story-ink: #05060a;
  --story-navy: #0e1220;
  --story-navy-2: #171c30;
  --story-fog: rgba(230, 232, 245, .78);
  --story-warm: #f4b640;
  --story-cool: #7c9bff;
  --story-rain: rgba(190, 205, 230, .55);
  --story-rose: #d98a9a;
}

h1, h2, h3, .chapter-kicker, .eyebrow { font-family: 'Cormorant Garamond', var(--font-display); }

/* ---------- Fixed ambient layers ---------- */
#rain-canvas {
  position: fixed; inset: 0; width: 100vw; height: 100vh;
  pointer-events: none; z-index: 5; opacity: .55; mix-blend-mode: screen;
}

#train-layer { position: fixed; inset: 0; pointer-events: none; z-index: 6; overflow: hidden; }
.train {
  position: absolute; top: 38%; left: -40vw; width: 42vw; height: 9vh; min-height: 60px;
  opacity: 0; will-change: transform, opacity;
}
.train-body {
  position: absolute; inset: 0; border-radius: var(--r-sm);
  background: linear-gradient(180deg, #1a1c24 0%, #0c0d12 60%, #05060a 100%);
  box-shadow: 0 10px 40px rgba(0,0,0,.6);
}
.train-windows {
  position: absolute; top: 22%; left: 4%; right: 4%; height: 30%;
  background-image: repeating-linear-gradient(90deg, rgba(244,182,64,.75) 0 6%, transparent 6% 10%);
  filter: blur(.3px);
}
.train.running { animation: trainSweep 3.2s linear; }
@keyframes trainSweep {
  0% { opacity: 0; transform: translateX(0); }
  6% { opacity: 1; }
  92% { opacity: 1; }
  100% { opacity: 0; transform: translateX(180vw); }
}
@media (prefers-reduced-motion: reduce) { .train.running { animation: none; opacity: 0; } }

/* ---------- Screen shake ---------- */
#shake-root { position: relative; }
#shake-root.shake { animation: screenShake .5s var(--ease); }
@keyframes screenShake {
  0%,100% { transform: translate(0,0); }
  15% { transform: translate(-6px, 3px); }
  30% { transform: translate(5px, -4px); }
  45% { transform: translate(-4px, 2px); }
  60% { transform: translate(3px, -2px); }
  75% { transform: translate(-2px, 1px); }
}
@media (prefers-reduced-motion: reduce) { #shake-root.shake { animation: none; } }

/* ---------- Progress rail / dots ---------- */
.chapter-rail {
  position: fixed; right: var(--sp-6); top: 50%; transform: translateY(-50%);
  z-index: 40; display: flex; flex-direction: column; gap: var(--sp-3);
}
.rail-dot {
  width: 12px; height: 12px; padding: 0; border-radius: var(--r-full);
  background: transparent; border: 2px solid rgba(255,255,255,.3);
  position: relative;
}
.rail-dot span { display: block; width: 100%; height: 100%; border-radius: var(--r-full); background: transparent; transition: background var(--dur) var(--ease); }
.rail-dot:hover { border-color: var(--story-warm); transform: none; }
.rail-dot.active { border-color: var(--story-warm); box-shadow: 0 0 10px rgba(244,182,64,.6); }
.rail-dot.active span { background: var(--story-warm); }
@media (max-width: 720px) { .chapter-rail { right: var(--sp-2); gap: var(--sp-2); } .rail-dot { width: 9px; height: 9px; } }

.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 45;
  background: rgba(255,255,255,.06);
}
.scroll-progress-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--story-cool), var(--story-warm));
  transition: width .1s linear;
}

.motion-toggle {
  position: fixed; top: var(--sp-4); left: var(--sp-4); z-index: 45;
  display: flex; align-items: center; gap: var(--sp-2);
  background: rgba(20,22,28,.7); backdrop-filter: blur(6px);
  border: 1px solid var(--border); font-size: var(--fs-xs);
}
.motion-toggle:hover { background: rgba(28,32,39,.85); }
.mt-icon svg { display: block; }
.mt-label { color: var(--muted); }

.skip-hint {
  position: fixed; bottom: var(--sp-4); left: 50%; transform: translateX(-50%);
  z-index: 40; font-size: var(--fs-xs); color: var(--muted);
  background: rgba(10,11,14,.55); padding: var(--sp-1) var(--sp-3); border-radius: var(--r-full);
  border: 1px solid var(--border); opacity: .85; pointer-events: none;
  transition: opacity .6s var(--ease);
}
.skip-hint.hide { opacity: 0; }

/* ---------- Chapters generic ---------- */
.chapter {
  position: relative; min-height: 100vh; width: 100%; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  padding: var(--sp-12) var(--sp-6);
}
.chapter--dark { background: radial-gradient(ellipse at 50% 0%, var(--story-navy-2) 0%, var(--story-navy) 45%, var(--story-ink) 100%); }
.chapter-inner { position: relative; z-index: 10; max-width: 880px; width: 100%; margin: 0 auto; text-align: center; }
.chapter-kicker {
  text-transform: uppercase; letter-spacing: .28em; font-size: var(--fs-xs); color: var(--story-warm);
  font-weight: 600; margin: 0 0 var(--sp-2);
}
.chapter-title { font-size: clamp(2.2rem, 5vw, var(--fs-3xl)); color: #fbf7ee; margin-bottom: var(--sp-6); }
.chapter-text { font-size: var(--fs-lg); color: var(--story-fog); line-height: 1.75; margin: 0 auto var(--sp-4); max-width: 62ch; }
.chapter-footnote { color: var(--muted); font-size: var(--fs-sm); margin-top: var(--sp-4); font-style: italic; }

.parallax-layer { position: absolute; inset: 0; will-change: transform; z-index: 1; }
.layer-bgtone { z-index: 0; opacity: .8; }
.tone-photo { background: radial-gradient(circle at 30% 20%, rgba(124,108,255,.12), transparent 55%); }
.tone-letter { background: radial-gradient(circle at 70% 25%, rgba(244,182,64,.1), transparent 55%); }
.tone-keepsake { background: radial-gradient(circle at 25% 70%, rgba(55,214,122,.08), transparent 55%); }
.tone-storm { background: radial-gradient(circle at 60% 30%, rgba(217,138,154,.14), transparent 60%); }

/* ---------- Reveal-on-scroll ---------- */
.reveal-up {
  opacity: 0; transform: translateY(28px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
  transition-delay: var(--rd, 0s);
}
.reveal-up.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal-up { transition: opacity .01s linear; transform: none; }
}

/* ================= CHAPTER 0 — HERO ================= */
.chapter--hero {
  background: linear-gradient(180deg, #060810 0%, #0a0d18 45%, #0d0f16 75%, #05060a 100%);
}
.layer-sky { background: radial-gradient(ellipse at 50% -10%, rgba(124,108,255,.18), transparent 60%); }
.layer-moon { top: 6%; left: 62%; width: 220px; height: 220px; }
.moon-svg { width: 100%; height: 100%; filter: drop-shadow(0 0 30px rgba(244,233,201,.35)); }
.layer-skyline { bottom: 26%; height: 30vh; }
.skyline-svg { width: 100%; height: 100%; }
.layer-rails { bottom: 8%; height: 20vh; }
.rails-svg { width: 100%; height: 100%; opacity: .9; }
.layer-fencesign { bottom: 6%; height: 24vh; opacity: .85; }
.fence-svg { width: 100%; height: 100%; }

.cat-silhouette {
  position: absolute; bottom: 6%; left: 50%; transform: translateX(-50%);
  width: 130px; height: 150px; z-index: 3; filter: drop-shadow(0 12px 18px rgba(0,0,0,.5));
  animation: catBreathe 4.5s ease-in-out infinite;
}
.cat-svg { width: 100%; height: 100%; }
@keyframes catBreathe { 0%,100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(-4px); } }
@media (prefers-reduced-motion: reduce) { .cat-silhouette { animation: none; } }

.hero-content { position: relative; z-index: 10; text-align: center; max-width: 720px; padding: 0 var(--sp-4); }
.eyebrow { text-transform: uppercase; letter-spacing: .32em; font-size: var(--fs-xs); color: var(--story-cool); margin-bottom: var(--sp-4); }
.hero-title { font-size: clamp(2.6rem, 8vw, 5rem); color: #fbf7ee; margin-bottom: var(--sp-6); text-shadow: 0 4px 40px rgba(124,108,255,.25); }
.hero-sub { font-size: var(--fs-lg); color: var(--story-fog); line-height: 1.7; margin-bottom: var(--sp-8); }

.scroll-cue {
  display: inline-flex; align-items: center; gap: var(--sp-2); background: rgba(244,182,64,.1);
  border: 1px solid rgba(244,182,64,.4); color: var(--story-warm); border-radius: var(--r-full);
  padding: var(--sp-3) var(--sp-6); font-size: var(--fs-sm); letter-spacing: .04em;
}
.scroll-cue:hover { background: rgba(244,182,64,.2); box-shadow: var(--shadow-glow); }
.scroll-cue-arrow { display: inline-block; animation: bob 1.6s ease-in-out infinite; }
@keyframes bob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(5px); } }
@media (prefers-reduced-motion: reduce) { .scroll-cue-arrow { animation: none; } }

.grain {
  position: absolute; inset: 0; pointer-events: none; opacity: .05; z-index: 4;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ================= CHAPTER 1 — PHOTOGRAPHS ================= */
.photo-strip {
  display: flex; flex-wrap: wrap; justify-content: center; gap: var(--sp-6);
  margin-top: var(--sp-8);
}
.photo-card {
  margin: 0; width: 200px; background: #f4efe4; padding: var(--sp-2) var(--sp-2) var(--sp-4);
  border-radius: var(--r-sm); box-shadow: var(--shadow-md);
  transform: rotate(var(--r, 0deg));
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.photo-card:hover { transform: rotate(0deg) scale(1.05) translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,.5); }
.photo-surface {
  width: 100%; aspect-ratio: 4/5; border-radius: 2px; margin-bottom: var(--sp-3);
  background-size: cover; background-position: center;
}
.photo-1 { background: linear-gradient(155deg,#6c7ba8,#3c4568 60%,#232840); }
.photo-2 { background: linear-gradient(155deg,#c98a5e,#8a5230 60%,#432712); }
.photo-3 { background: linear-gradient(155deg,#8fae8a,#4c6b4a 60%,#28381f); }
.photo-4 { background: linear-gradient(155deg,#9c8ab0,#584469 60%,#2c2138); }
.photo-1::after, .photo-2::after, .photo-3::after, .photo-4::after { content: ""; }
.photo-surface { position: relative; overflow: hidden; }
.photo-surface::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(circle at 30% 25%, rgba(255,255,255,.35), transparent 45%);
}
.photo-card figcaption { font-size: var(--fs-xs); color: #3a3226; font-style: italic; line-height: 1.5; text-align: left; }

/* ================= CHAPTER 2 — LETTERS ================= */
.letter-stack {
  display: flex; flex-wrap: wrap; gap: var(--sp-4); justify-content: center; margin-top: var(--sp-8);
}
.letter-card {
  --lr: 0deg;
  width: 260px; min-height: 150px; perspective: 1200px; cursor: pointer;
  background: transparent; border: none; padding: 0;
}
.letter-inner {
  position: relative; width: 100%; height: 100%; min-height: 150px;
  transition: transform .6s var(--ease); transform-style: preserve-3d;
}
.letter-card.flipped .letter-inner { transform: rotateY(180deg); }
.letter-face {
  position: absolute; inset: 0; backface-visibility: hidden; border-radius: var(--r-md);
  padding: var(--sp-4); display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center;
  box-shadow: var(--shadow-sm);
}
.letter-front {
  background: linear-gradient(160deg, var(--surface-2), var(--surface));
  border: 1px dashed var(--border-strong); gap: var(--sp-2);
}
.letter-front .env-icon { color: var(--story-warm); }
.letter-front .env-to { font-size: var(--fs-sm); color: var(--muted); }
.letter-front .env-name { font-family: 'Cormorant Garamond', serif; font-size: var(--fs-lg); color: var(--text); font-style: italic; }
.letter-back {
  background: #efe8d6; color: #352b1c; transform: rotateY(180deg); text-align: left;
  align-items: flex-start; justify-content: flex-start; font-size: var(--fs-sm); line-height: 1.6;
  overflow-y: auto; max-height: 260px;
}
.letter-back p { margin: 0 0 var(--sp-2); font-style: italic; }
.letter-back .letter-sign { text-align: right; width: 100%; font-size: var(--fs-xs); opacity: .75; }
.letter-card:hover .letter-inner { box-shadow: var(--shadow-glow); }
.letter-preview { font-size: var(--fs-xs); color: var(--muted); line-height: 1.55; margin-top: var(--sp-1); }
.letter-hint { display: inline-flex; align-items: center; gap: var(--sp-1); font-size: var(--fs-xs); color: var(--story-warm); opacity: .8; margin-top: var(--sp-2); }
.letter-body { font-size: var(--fs-sm); line-height: 1.65; display: block; }

/* ================= CHAPTER 3 — KEEPSAKES ================= */
.keepsake-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--sp-4); margin-top: var(--sp-8);
}
.keepsake-item { list-style: none; display: block; }
.keepsake-card {
  --kr: 0deg; perspective: 1200px; cursor: pointer; background: transparent; border: none; padding: 0; aspect-ratio: 1; width: 100%;
}
.keepsake-inner { position: relative; width: 100%; height: 100%; transition: transform .6s var(--ease); transform-style: preserve-3d; }
.keepsake-card.flipped .keepsake-inner { transform: rotateY(180deg); }
.keepsake-face {
  position: absolute; inset: 0; backface-visibility: hidden; border-radius: var(--r-lg);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--sp-2);
  padding: var(--sp-3); text-align: center; border: 1px solid var(--border);
}
.keepsake-front { background: linear-gradient(160deg, var(--surface-2), var(--surface)); color: var(--text); }
.keepsake-front svg { color: var(--story-warm); width: 30px; height: 30px; }
.keepsake-front .ks-name { font-size: var(--fs-sm); font-weight: 600; }
.keepsake-back { background: #171b26; color: var(--story-fog); transform: rotateY(180deg); font-size: var(--fs-xs); line-height: 1.55; }
.keepsake-card:hover .keepsake-inner { box-shadow: var(--shadow-glow); }

/* ================= CHAPTER 4 — STORM ================= */
.chapter--storm { background: radial-gradient(ellipse at 50% 10%, #21283f 0%, #10121c 55%, #05060a 100%); }
.lightning {
  position: absolute; inset: 0; background: #eef1ff; opacity: 0; pointer-events: none; z-index: 2; mix-blend-mode: overlay;
}
.lightning.flash { animation: flash .5s ease-out; }
@keyframes flash { 0% { opacity: 0; } 8% { opacity: .8; } 16% { opacity: .1; } 24% { opacity: .6; } 100% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .lightning.flash { animation: none; } }
.storm-quote {
  margin: var(--sp-6) auto; max-width: 58ch; font-family: 'Cormorant Garamond', serif; font-style: italic;
  font-size: var(--fs-xl); color: var(--story-rose); line-height: 1.6; border-left: 3px solid var(--story-rose);
  padding-left: var(--sp-4); text-align: left;
}

/* ================= CHAPTER 5 — REVEAL ================= */
.chapter--reveal {
  background: linear-gradient(180deg, #10131c 0%, #171425 40%, #241a2c 70%, #3a2a30 100%);
  flex-direction: column; padding-bottom: var(--sp-8);
}
.layer-dawn { background: radial-gradient(ellipse at 50% 100%, rgba(244,182,64,.16), transparent 65%); }
.reveal-inner { max-width: 680px; }
.final-letter {
  background: #efe8d6; color: #352b1c; text-align: left; border-radius: var(--r-md);
  padding: var(--sp-8); box-shadow: var(--shadow-md); font-size: var(--fs-md); line-height: 1.75;
  margin-bottom: var(--sp-8);
}
.final-letter p { margin: 0 0 var(--sp-4); font-style: italic; }
.final-letter .signoff { text-align: right; font-size: var(--fs-sm); opacity: .8; margin-bottom: 0; }

.reveal-btn {
  background: var(--story-warm); color: var(--primary-ink); border: none; font-weight: 600;
  padding: var(--sp-3) var(--sp-8); border-radius: var(--r-full); font-size: var(--fs-md);
}
.reveal-btn:hover { box-shadow: var(--shadow-glow); }

.answer-panel { margin-top: var(--sp-8); animation: fadeUp .6s var(--ease); }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) { .answer-panel { animation: none; } }
.answer-line { font-size: var(--fs-lg); color: #fbf7ee; font-family: 'Cormorant Garamond', serif; font-style: italic; margin-bottom: var(--sp-3); }
.answer-sub { color: var(--story-fog); font-size: var(--fs-sm); line-height: 1.7; margin-bottom: var(--sp-6); }
.restart-btn { display: inline-flex; align-items: center; gap: var(--sp-2); }

.credits { margin-top: var(--sp-12); text-align: center; color: var(--muted); font-size: var(--fs-xs); }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .chapter { padding: var(--sp-8) var(--sp-4); }
  .photo-card { width: 42vw; min-width: 130px; }
  .letter-card { width: 42vw; min-width: 140px; }
  .layer-moon { width: 110px; height: 110px; left: 68%; }
  .storm-quote { font-size: var(--fs-lg); }
}