/* 《隙·门里门外》—— 3D 可交互展示 */

:root {
  --ink: oklch(0.18 0.02 280);
  --paper: oklch(0.94 0.015 80);
  --warm-core: oklch(0.72 0.15 55);
  --warm-deep: oklch(0.48 0.14 40);
  --cool-shell: oklch(0.32 0.08 290);
  --cool-deep: oklch(0.22 0.06 285);
  --accent-gold: oklch(0.82 0.12 85);
  --accent-jade: oklch(0.68 0.08 165);

  --font-serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-sans: "Noto Sans SC", -apple-system, "PingFang SC", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
  color: var(--paper);
  font-family: var(--font-sans);
  user-select: none;
  -webkit-user-select: none;
}

#root {
  width: 100vw;
  height: 100vh;
  position: relative;
  overflow: hidden;
}

/* === 舞台 === */
.stage {
  position: absolute;
  inset: 0;
  perspective: 1600px;
  perspective-origin: 50% 45%;
  background:
    radial-gradient(ellipse at 50% 45%, oklch(0.28 0.08 290) 0%, oklch(0.14 0.04 285) 55%, oklch(0.07 0.02 280) 100%);
  overflow: hidden;
  cursor: grab;
}
.stage.dragging { cursor: grabbing; }
.stage.peeking { cursor: pointer; }

.stage-world {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  will-change: transform;
}

/* 舞台纸张纹理 */
.stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,180,120,0.04), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(120,100,180,0.06), transparent 40%);
  pointer-events: none;
  z-index: 1;
}

/* 画面外的暗角 */
.stage::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(0,0,0,0.55) 100%);
  pointer-events: none;
  z-index: 50;
}

/* === 图层（视差层） === */
.parallax-layer {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  will-change: transform, filter;
  backface-visibility: hidden;
}

.parallax-layer img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  -webkit-user-drag: none;
}

/* 门扇特殊处理 —— 有自己的旋转轴 */
.door-wing {
  transform-origin: var(--hinge-x, 0%) 50%;
  transform-style: preserve-3d;
  transition: transform 1.8s cubic-bezier(0.4, 0.0, 0.2, 1), filter 0.6s;
}

.door-wing.open.left {
  transform: translate(-50%, -50%) rotateY(-78deg);
  filter: brightness(0.75);
}
.door-wing.open.right {
  transform: translate(-50%, -50%) rotateY(78deg);
  filter: brightness(0.75);
}

/* 门环热点 */
.door-knocker {
  position: absolute;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  cursor: pointer;
  pointer-events: auto;
  z-index: 30;
  transition: all 0.4s;
}
.door-knocker::before {
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: radial-gradient(circle, oklch(0.82 0.15 75 / 0.6) 0%, transparent 65%);
  opacity: 0;
  transition: opacity 0.4s;
  animation: pulse 2.4s ease-in-out infinite;
}
.door-knocker:hover::before {
  opacity: 1;
}
.door-knocker::after {
  content: "";
  position: absolute;
  inset: 22px;
  border-radius: 50%;
  border: 1.5px solid oklch(0.85 0.12 80 / 0.7);
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.25); opacity: 1; }
}

/* === 粒子容器 === */
.particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 15;
  overflow: hidden;
}

.particle {
  position: absolute;
  will-change: transform, opacity;
}

.firefly {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: oklch(0.92 0.15 85);
  box-shadow:
    0 0 4px oklch(0.92 0.15 85),
    0 0 10px oklch(0.82 0.18 70 / 0.8),
    0 0 20px oklch(0.72 0.2 55 / 0.5);
}

.petal {
  width: 14px;
  height: 10px;
  background: oklch(0.9 0.05 80);
  border-radius: 100% 0 100% 0;
  opacity: 0.7;
  filter: blur(0.3px);
}

.mist {
  border-radius: 50%;
  background: radial-gradient(circle, rgba(210, 180, 220, 0.18), transparent 70%);
  filter: blur(6px);
}

.kanji {
  font-family: var(--font-serif);
  font-weight: 400;
  color: oklch(0.85 0.08 60 / 0.3);
  text-shadow: 0 0 12px oklch(0.7 0.15 55 / 0.5);
  pointer-events: none;
}

/* === 信息卡片（可拖动） === */
.card {
  position: absolute;
  background: oklch(0.94 0.015 80 / 0.92);
  color: var(--ink);
  border-radius: 2px;
  box-shadow:
    0 2px 8px rgba(0,0,0,0.25),
    0 20px 60px rgba(0,0,0,0.45);
  z-index: 100;
  pointer-events: auto;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid oklch(0.85 0.02 80 / 0.4);
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}
.card.dragging {
  box-shadow:
    0 8px 20px rgba(0,0,0,0.4),
    0 40px 100px rgba(0,0,0,0.6);
  z-index: 200;
}
.card.collapsed .card-body { display: none; }

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--ink);
  color: var(--paper);
  cursor: grab;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.card-head:active { cursor: grabbing; }
.card-head .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-gold);
  margin-right: 8px;
  display: inline-block;
}
.card-head .tag { flex: 1; }
.card-head .close {
  font-family: var(--font-mono);
  cursor: pointer;
  opacity: 0.6;
  padding: 0 4px;
}
.card-head .close:hover { opacity: 1; }

.card-body {
  padding: 16px 18px 18px;
}

/* 主标题卡特殊样式 */
.card.title-card {
  background: oklch(0.96 0.01 80);
  border-left: 3px solid var(--warm-core);
}
.card.title-card .zh {
  font-family: var(--font-serif);
  font-size: 42px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.08em;
  color: var(--ink);
  margin-bottom: 6px;
}
.card.title-card .zh .gap {
  color: var(--warm-deep);
  font-style: italic;
}
.card.title-card .en {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: oklch(0.45 0.05 40);
  margin-bottom: 14px;
}
.card.title-card .sub {
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.7;
  color: oklch(0.28 0.03 285);
  max-width: 340px;
}

.card.desc-card .body-text {
  font-family: var(--font-serif);
  font-size: 12.5px;
  line-height: 1.85;
  color: oklch(0.22 0.02 285);
  max-width: 320px;
  text-align: justify;
  text-wrap: pretty;
}
.card.desc-card .body-text p + p { margin-top: 10px; }
.card.desc-card .caption {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.25em;
  color: oklch(0.5 0.04 40);
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid oklch(0.85 0.02 80);
}

.card.glossary-card {
  width: 280px;
}
.card.glossary-card .item {
  display: flex;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px dotted oklch(0.8 0.02 80);
  align-items: flex-start;
}
.card.glossary-card .item:last-child { border: none; }
.card.glossary-card .num {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--warm-deep);
  min-width: 22px;
  padding-top: 2px;
}
.card.glossary-card .label {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--ink);
  font-weight: 600;
}
.card.glossary-card .def {
  font-family: var(--font-sans);
  font-size: 10.5px;
  line-height: 1.5;
  color: oklch(0.4 0.02 285);
  margin-top: 2px;
}

.card.palette-card { width: 220px; }
.card.palette-card .swatch-row {
  display: flex;
  gap: 4px;
  margin-top: 8px;
  margin-bottom: 4px;
}
.card.palette-card .sw {
  flex: 1;
  height: 48px;
  border-radius: 1px;
  position: relative;
  cursor: pointer;
}
.card.palette-card .sw-meta {
  font-family: var(--font-mono);
  font-size: 8px;
  color: oklch(0.4 0.02 285);
  letter-spacing: 0.1em;
  margin-top: 4px;
  display: flex;
  justify-content: space-between;
}

.card.author-card { width: 240px; }
.card.author-card .line {
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.9;
  letter-spacing: 0.08em;
  color: oklch(0.25 0.02 285);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 3px 0;
  border-bottom: 1px dotted oklch(0.8 0.02 80);
}
.card.author-card .line:last-child { border: none; }
.card.author-card .k { color: oklch(0.5 0.04 40); text-transform: uppercase; }

/* 漂浮关键词 —— 门内世界的氤氲汉字 */
.float-kanji-card {
  position: absolute;
  font-family: var(--font-serif);
  z-index: 60;
  cursor: grab;
  pointer-events: auto;
  user-select: none;
  white-space: nowrap;
  padding: 4px 8px;
}
.float-kanji-card:active { cursor: grabbing; }

/* === 顶部/底部 HUD === */
.hud {
  position: absolute;
  z-index: 150;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: oklch(0.85 0.02 80 / 0.85);
  text-transform: uppercase;
  pointer-events: none;
  mix-blend-mode: screen;
}
.hud-tl { top: 18px; left: 22px; }
.hud-tr { top: 18px; right: 22px; text-align: right; }
.hud-bl { bottom: 18px; left: 22px; }
.hud-br { bottom: 18px; right: 22px; text-align: right; pointer-events: auto; }

.hud .row { display: flex; gap: 10px; align-items: baseline; }
.hud .num { font-size: 16px; color: var(--accent-gold); letter-spacing: 0.08em; }
.hud .sep { opacity: 0.4; }

.hud-br button {
  background: transparent;
  border: 1px solid oklch(0.85 0.02 80 / 0.3);
  color: oklch(0.85 0.02 80 / 0.8);
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  cursor: pointer;
  margin-left: 6px;
  transition: all 0.3s;
}
.hud-br button:hover {
  background: oklch(0.85 0.02 80 / 0.1);
  border-color: oklch(0.85 0.02 80 / 0.6);
  color: oklch(0.95 0.02 80);
}

/* 导览遮罩 */
.intro-overlay {
  position: absolute;
  inset: 0;
  z-index: 300;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 30%, rgba(0,0,0,0.5) 100%);
  opacity: 1;
  transition: opacity 1.2s;
}
.intro-overlay.hidden { opacity: 0; }

.intro-title {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  font-family: var(--font-serif);
  color: var(--paper);
  opacity: 0;
  animation: introFade 8s ease-in-out forwards;
}
@keyframes introFade {
  0% { opacity: 0; transform: translate(-50%, -48%); }
  12% { opacity: 1; transform: translate(-50%, -50%); }
  75% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -52%); }
}
.intro-title .zh {
  font-size: 72px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-shadow: 0 0 40px oklch(0.7 0.15 55 / 0.6);
}
.intro-title .zh .gap {
  color: var(--accent-gold);
}
.intro-title .en {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.6em;
  margin-top: 14px;
  opacity: 0.7;
  text-transform: uppercase;
}
.intro-title .hint {
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.2em;
  margin-top: 40px;
  opacity: 0.5;
  animation: hintBlink 2.4s ease-in-out infinite;
  animation-delay: 4s;
}
@keyframes hintBlink {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.75; }
}

/* 镜头进入门时的闪白 */
.flash {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 52%, oklch(0.97 0.08 80) 0%, oklch(0.85 0.15 70 / 0.8) 20%, transparent 60%);
  z-index: 250;
  pointer-events: none;
  opacity: 0;
  mix-blend-mode: screen;
}
.flash.on {
  animation: flashPulse 2.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
@keyframes flashPulse {
  0% { opacity: 0; transform: scale(0.4); }
  40% { opacity: 1; transform: scale(1.8); }
  100% { opacity: 0; transform: scale(3); }
}

/* Tweaks 面板 */
.tweaks {
  position: fixed;
  right: 16px;
  top: 64px;
  width: 260px;
  background: oklch(0.12 0.02 285 / 0.95);
  color: var(--paper);
  border: 1px solid oklch(0.3 0.04 285);
  border-radius: 2px;
  padding: 0;
  z-index: 500;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  display: none;
  backdrop-filter: blur(10px);
}
.tweaks.on { display: block; }
.tweaks h4 {
  padding: 10px 14px;
  background: var(--ink);
  border-bottom: 1px solid oklch(0.3 0.04 285);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  font-size: 10px;
}
.tweaks .row {
  padding: 8px 14px;
  border-bottom: 1px solid oklch(0.2 0.02 285);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.tweaks .row:last-child { border: none; }
.tweaks label { opacity: 0.7; text-transform: uppercase; }
.tweaks input[type="range"] { width: 90px; accent-color: var(--accent-gold); }
.tweaks select {
  background: var(--ink);
  color: var(--paper);
  border: 1px solid oklch(0.3 0.04 285);
  padding: 3px 6px;
  font-family: var(--font-mono);
  font-size: 10px;
}
.tweaks .swatch-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 4px;
  padding: 8px 14px;
}
.tweaks .swatch {
  aspect-ratio: 1;
  cursor: pointer;
  border: 2px solid transparent;
}
.tweaks .swatch.active { border-color: var(--accent-gold); }

/* 轻微抖动（cinematic） */
@keyframes camShake {
  0%, 100% { transform: translate(0,0); }
  25% { transform: translate(-0.5px, 0.3px); }
  75% { transform: translate(0.3px, -0.4px); }
}