/* ==================== engraving / botanical illustration style ====================
   Inspired by 19th-century natural history plates: aged paper, brown-black ink,
   cross-hatching and stippling for volume, wobbly hand-drawn strokes.
*/
:root {
  /* paper tones — aged ivory / buttermilk */
  --paper:        #ece2c8;
  --paper-warm:   #e3d2a8;
  --paper-deep:   #c8b488;
  --paper-fold:   #a18a5a;
  --paper-shadow: #8a6f3c;
  /* ink tones — walnut / sepia */
  --ink:          #2e1e10;
  --ink-soft:     #4a2f18;
  --ink-faint:    #6a4a28;
  /* accent ink — faded red and teal (botanical illustration secondaries) */
  --ink-red:      #8a2a18;
  --ink-teal:     #2a5a4a;
  --ink-gold:     #8a6028;
  /* lamp glow — still warm, but renders as paper-tint rather than light */
  --lamp-hue: 38;
  --lamp-sat: 55%;
  --lamp-light: 58%;
  --lamp-intensity: 1;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  height: 100%;
  overflow: hidden;
  background: #0a0806;
  font-family: 'EB Garamond', 'Cormorant Garamond', Georgia, serif;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  user-select: none;
  cursor: default;
}
#root { height: 100%; width: 100%; }

/* ==================== stage ==================== */
.stage {
  position: relative;
  width: 100%; height: 100%;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 50% 45%, var(--paper) 0%, var(--paper-warm) 55%, var(--paper-deep) 100%);
  transition: filter 1.6s ease;
  filter: brightness(.62) saturate(.75);
}
.stage.on { filter: brightness(1) saturate(1); }

/* ==================== paper background ==================== */
/* foxing (those little brown age-spots), scanlines, and deep vignette */
.paper-ground {
  position: absolute;
  inset: 0;
  background:
    /* faint scanline (engraving plate feel) */
    repeating-linear-gradient(0deg, rgba(46,30,16,.035) 0 1px, transparent 1px 3px),
    /* foxing spots */
    radial-gradient(ellipse 3% 2% at 18% 22%, rgba(138,96,40,.18), transparent 60%),
    radial-gradient(ellipse 2% 2% at 78% 38%, rgba(138,42,24,.15), transparent 60%),
    radial-gradient(ellipse 4% 3% at 28% 78%, rgba(138,96,40,.18), transparent 60%),
    radial-gradient(ellipse 3% 2% at 86% 82%, rgba(46,30,16,.14), transparent 60%),
    radial-gradient(ellipse 2% 2% at 58% 12%, rgba(138,42,24,.12), transparent 60%),
    /* paper base */
    radial-gradient(ellipse 90% 70% at 50% 50%, var(--paper) 0%, var(--paper-warm) 60%, var(--paper-deep) 100%);
  pointer-events: none;
}
.paper-ground::before {
  /* paper fibre noise */
  content: '';
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='260' height='260'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='1.4' numOctaves='2' seed='3'/><feColorMatrix values='0 0 0 0 0.30  0 0 0 0 0.22  0 0 0 0 0.10  0 0 0 0.35 0'/></filter><rect width='100%' height='100%' filter='url(#n)'/></svg>");
  mix-blend-mode: multiply;
  opacity: .45;
}
.paper-ground::after {
  /* deep corner vignette, gives the plate depth */
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 50% 55%, transparent 45%, rgba(60,40,18,.35) 85%, rgba(30,18,8,.6) 100%);
  mix-blend-mode: multiply;
  pointer-events: none;
  transition: background 1.6s ease;
}

/* lamp-on: big warm halo in the center, stronger vignette in corners */
.stage.on .paper-ground::after {
  background:
    radial-gradient(ellipse 55% 50% at 50% 52%,
      hsla(var(--lamp-hue), 70%, 78%, calc(.55 * var(--lamp-intensity))) 0%,
      hsla(var(--lamp-hue), 60%, 68%, calc(.25 * var(--lamp-intensity))) 35%,
      transparent 65%),
    radial-gradient(ellipse 70% 60% at 50% 55%, transparent 55%, rgba(60,40,18,.28) 90%, rgba(30,18,8,.5) 100%);
  mix-blend-mode: multiply;
}

/* global hand-drawn wobble — used on all engraving SVGs */
.wobble { filter: url(#wobble); }

/* ==================== room scene (push-in composition) ==================== */
.room-scene {
  position: absolute; inset: 0;
  transform-origin: 50% 55%;
  transition: transform 2.2s cubic-bezier(.5,.02,.25,1), filter 1.6s ease, opacity 1.4s ease;
  will-change: transform, filter, opacity;
}
.room-scene.view-room    { transform: scale(1) translateY(0); filter: blur(0); opacity: 1; }
.room-scene.view-drawer  { transform: scale(1.28) translateY(-18%); filter: blur(1.5px) brightness(.85); opacity: .85; }
.room-scene.view-card    { transform: scale(1.6) translateY(-26%); filter: blur(5px) brightness(.75); opacity: .55; }
@keyframes sceneBlur {
  0%   { filter: blur(0); }
  40%  { filter: blur(4px); }
  70%  { filter: blur(4px); }
  100% { }
}
.room-scene.moving { animation: sceneBlur 2.2s cubic-bezier(.5,.02,.25,1); }

/* ==================== plate title block ==================== */
.plate-title {
  position: absolute;
  top: 22px; left: 50%;
  transform: translateX(-50%);
  text-align: center;
  font-family: 'Cormorant Garamond', serif;
  color: var(--ink);
  pointer-events: none;
  z-index: 55;
}
.plate-title .eyebrow {
  font-family: 'Special Elite', monospace;
  font-size: 10px;
  letter-spacing: .48em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 4px;
}
.plate-title h1 {
  margin: 0;
  font-size: 42px;
  font-style: italic;
  font-weight: 500;
  letter-spacing: .03em;
}
.plate-title .fig {
  font-family: 'Special Elite', monospace;
  font-size: 15px;
  letter-spacing: .22em;
  color: var(--ink-faint);
  margin-top: 4px;
  text-transform: uppercase;
}
.plate-title .rule {
  width: 220px; height: 1px; background: var(--ink);
  margin: 10px auto 0; opacity: .6;
}

/* engraved ornament rows above + below the title */
.plate-title .orn-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}
.plate-title .orn-row.top    { margin-bottom: 2px; }
.plate-title .orn-row.bottom { margin-top: 6px; }

.plate-title .orn-rule {
  display: block;
  width: 180px;
  height: 1px;
  background: var(--ink);
  opacity: .72;
  position: relative;
}
/* bottom rule is one longer line with small diamonds at each end */
.plate-title .orn-rule.with-caps {
  width: 380px;
}
.plate-title .orn-rule.with-caps::before,
.plate-title .orn-rule.with-caps::after {
  content: '';
  position: absolute;
  width: 6px; height: 6px;
  background: var(--ink);
  transform: rotate(45deg);
  top: -3px;
  opacity: .85;
}
.plate-title .orn-rule.with-caps::before { left:  -3px; }
.plate-title .orn-rule.with-caps::after  { right: -3px; }

.plate-title .orn-fleuron {
  font-family: 'Cormorant Garamond', 'EB Garamond', serif;
  font-size: 18px;
  line-height: 1;
  color: var(--ink);
  opacity: .85;
  transform: translateY(-1px);
}

/* ==================== lamp ==================== */
.lamp-holder {
  position: absolute;
  right: 14%;
  top: 62%;
  transform: translateY(-89%); /* base disc center aligns to desk top surface (SVG y475 of 520 in original) */
  width: 200px;
  height: 420px;
  z-index: 5;
  transition: filter 1.4s ease;
}
.lamp-holder svg { overflow: visible; display: block; width:100%; height:100%; }

.pull-cord {
  position: absolute;
  top: 220px;
  right: 24px;
  width: 64px;
  height: 200px;
  cursor: grab;
  touch-action: none;
  z-index: 6;
}
.pull-cord:active { cursor: grabbing; }
.pull-cord:hover ~ .cord-hint { opacity: 0; }

/* Shared style: cord-hint and drawer-hint use identical typography & frame.
   cord-hint sits to the right of the cord, arrow points LEFT (←) at the cord.
   drawer-hint sits below the closed drawer, arrow points UP (↑) at the drawer. */
.cord-hint, .drawer-hint {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'Special Elite', 'Courier New', monospace;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ink-faint, rgba(46,30,16,.7));
  white-space: nowrap;
  pointer-events: none;
  z-index: 7;
  animation: cordHintFloat 2.4s ease-in-out infinite;
}
.cord-hint {
  top: 226px;             /* level with the cord tassel bottom in lamp-holder coords */
  right: -150px;          /* outside the lamp-holder, to the right of the cord */
}
.cord-hint-text, .drawer-hint-text {
  background: rgba(236,226,200,.7);
  padding: 3px 10px;
  border: 1px solid rgba(46,30,16,.25);
}
.cord-hint-arrow, .drawer-hint-arrow {
  display: inline-block;
  font-size: 15px;
  line-height: 1;
}
.cord-hint-arrow   { animation: hintArrowLeft  1.6s ease-in-out infinite; }
.drawer-hint-arrow { animation: hintArrowUp    1.6s ease-in-out infinite; }
@keyframes cordHintFloat {
  0%, 100% { opacity: .6; }
  50%      { opacity: 1; }
}
@keyframes hintArrowLeft {
  0%, 100% { transform: translateX(0); }
  50%      { transform: translateX(-5px); }
}
@keyframes hintArrowUp {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-5px); }
}

/* glow layer no longer needed — halo is driven by .paper-ground::after */
.lamp-glow { display: none; }

/* ==================== desk objects ==================== */
.desk-line {
  /* a horizontal hand-drawn rule for the desk edge */
  position: absolute;
  left: 0; right: 0;
  top: 62%;
  height: 70px;
  z-index: 3;
  pointer-events: none;
}
.book, .mug, .pen, .inkwell {
  position: absolute;
  z-index: 4;
  pointer-events: none;
}
/* book + mug rest ON the desk top — bottoms physically touch the desk surface line */
.book { left: 9%;  bottom: calc(38% - 20px); width: 260px; height: 70px; }
.mug  { left: 22%; bottom: calc(38% - 14px); width: 140px; height: 160px; }
.pen  { left: 4%;  top: 80%; width: 280px; height: 40px; transform: rotate(6deg); display: none; }
.inkwell { left: 20%; top: 76%; width: 110px; height: 120px; display: none; }

/* ==================== closed drawer (in room view) ==================== */
/* tucked directly under the desk front edge so desk+cabinet read as one piece of furniture */
.drawer-closed {
  position: absolute;
  left: 50%;
  top: calc(62% + 56px); /* desk top:62%, desk thickness ~56px → cabinet begins right below */
  transform: translateX(-50%);
  width: min(760px, 58vw);
  z-index: 7;
  cursor: pointer;
  transition: transform .3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.drawer-closed:hover { transform: translateX(-50%) translateY(-2px); }
.drawer-closed svg.drawer-front { width: 100%; height: 150px; display: block; overflow: visible; }

/* drawer-hint sits centered just below the closed drawer, horizontal layout:
   "拉开抽屉 · open ↑" with the arrow pointing up at the drawer. */
.drawer-hint {
  position: relative;     /* override absolute from shared rule — keep it in flex flow */
  margin-top: 14px;
}

/* "Wake" nudge: when the lamp turns on, the drawer makes a tiny lift — *微微* —
   so the viewer notices it as the next interactive thing without it feeling busy. */
.drawer-closed.waking {
  animation: drawerNudge .72s ease;
}
@keyframes drawerNudge {
  0%   { transform: translateX(-50%) translateY(0); }
  35%  { transform: translateX(-50%) translateY(-3px); }
  65%  { transform: translateX(-50%) translateY(0); }
  85%  { transform: translateX(-50%) translateY(-1.5px); }
  100% { transform: translateX(-50%) translateY(0); }
}

/* ==================== drawer overlay (top-down view) ==================== */
.drawer-overlay {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%) scale(.75);
  width: min(1100px, 88%);
  height: min(680px, 84%);
  opacity: 0;
  pointer-events: none;
  z-index: 20;
  background: transparent;
  transition: transform 1.8s cubic-bezier(.5,.05,.25,1), opacity 1.2s ease;
  will-change: transform, opacity;
  perspective: 1400px;
}
.drawer-overlay.open {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
  pointer-events: auto;
}
.drawer-overlay.dimmed { filter: brightness(.7) blur(2px); pointer-events: none; }

.drawer-box {
  position: relative;
  width: 100%; height: 100%;
}
.drawer-box .drawer-svg {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
}

/* ==================== cards ==================== */
.cards-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 10;
}
.cards-layer.active { pointer-events: auto; }

.card-slot {
  position: absolute;
  width: 280px;
  height: 400px;
  transform-style: preserve-3d;
  transition:
    transform 1.6s cubic-bezier(.5,.05,.25,1),
    opacity .6s ease,
    filter .6s ease;
  cursor: pointer;
  will-change: transform, opacity;
}
.card-slot .card-inner {
  position: relative;
  width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform 1.4s cubic-bezier(.6,0,.3,1);
}
.card-slot .face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  overflow: hidden;
  filter: drop-shadow(0 12px 18px rgba(30,18,8,.35));
}
.card-slot .face.back { transform: rotateY(180deg); }
.card-slot.flipping .card-inner { transform: rotateY(180deg); }
.card-slot:hover:not(.flying) { z-index: 15; }

/* ==================== back buttons ==================== */
.back-btn, .back-to-room {
  position: fixed;
  top: 28px; left: 32px;
  z-index: 120;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  font-family: 'Special Elite', monospace;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--ink-soft);
  border-radius: 0;
  cursor: pointer;
  text-transform: uppercase;
  box-shadow: 3px 3px 0 rgba(46,30,16,.2);
  transition: transform .2s, box-shadow .2s;
}
.back-btn:hover, .back-to-room:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 rgba(46,30,16,.25);
}
.back-to-room { z-index: 80; opacity: 0; transition: opacity .6s ease; }
.back-to-room.show { opacity: 1; }

/* ==================== dust (in scene) ==================== */
.dust {
  position: absolute; inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 1.6s ease;
  z-index: 4;
}
.dust.on { opacity: 1; }
.dust .mote {
  position: absolute;
  border-radius: 50%;
  background: hsla(var(--lamp-hue), 60%, 50%, .55);
  animation: drift linear infinite;
  mix-blend-mode: multiply;
}
@keyframes drift {
  0%   { transform: translate3d(0,0,0); opacity: 0; }
  12%  { opacity: .6; }
  50%  { opacity: .8; }
  92%  { opacity: .4; }
  100% { transform: translate3d(var(--dx,30px), var(--dy,-180px), 0); opacity: 0; }
}

/* ==================== corner plate ornaments ==================== */
.corner-orn {
  position: absolute;
  width: 80px; height: 80px;
  pointer-events: none;
  opacity: .55;
  z-index: 55;
}
.corner-orn.tl { top: 18px; left: 18px; }
.corner-orn.tr { top: 18px; right: 18px; transform: scaleX(-1); }
.corner-orn.bl { bottom: 18px; left: 18px; transform: scaleY(-1); }
.corner-orn.br { bottom: 18px; right: 18px; transform: scale(-1,-1); }

/* page-layer background */
.page-layer {
  position: fixed; inset: 0;
  background: var(--paper);
  opacity: 0;
  pointer-events: none;
  transition: opacity .9s ease;
  z-index: 100;
  overflow: hidden;
}
.page-layer.active { opacity: 1; pointer-events: auto; }

/* ==================== tweaks panel ==================== */
.tweaks {
  position: fixed;
  right: 20px; bottom: 20px;
  z-index: 200;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--ink-soft);
  padding: 18px 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  min-width: 260px;
  box-shadow: 4px 4px 0 rgba(46,30,16,.2);
}
.tweaks h4 {
  margin: 0 0 14px;
  font-family: 'Special Elite', monospace;
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--ink);
  text-transform: uppercase;
  border-bottom: 1px solid var(--ink-soft);
  padding-bottom: 8px;
}
.tweaks .row { margin-bottom: 14px; }
.tweaks .row:last-child { margin-bottom: 0; }
.tweaks label {
  display: block;
  margin-bottom: 6px;
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: .12em;
}
.tweaks input[type=range] {
  width: 100%;
  accent-color: var(--ink-red);
}
.tweaks .swatches {
  display: flex; gap: 8px; flex-wrap: wrap;
}
.tweaks .sw {
  width: 28px; height: 28px;
  border-radius: 0;
  cursor: pointer;
  border: 2px solid var(--ink-soft);
  transition: transform .2s, border-color .2s;
}
.tweaks .sw:hover { transform: scale(1.1); }
.tweaks .sw.on { border-color: var(--ink-red); }
.tweaks .value {
  font-size: 10px;
  color: var(--ink-faint);
  float: right;
}