/* ════════════════════════════════════════════════════════════
   林间宅 —— 界面层
   3D 是主角，界面是"字幕 + 控制台"的存在：
   平时几乎看不见，需要时才浮现。
   ════════════════════════════════════════════════════════════ */

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

:root {
  --bone: #f2e9db;
  --bone-dim: #a89c8c;
  --bone-faint: #6a6157;
  --ink: #0b100e;
  --ink-soft: #141a17;
  --line: rgba(242, 233, 219, 0.13);
  --line-strong: rgba(242, 233, 219, 0.24);
  --accent: #d9a05b;
  --accent-dim: rgba(217, 160, 91, 0.18);

  --edge: clamp(16px, 3.2vw, 48px);
  --panel-w: min(360px, 90vw);

  --serif: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif CJK SC",
           "SimSun", "Times New Roman", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
          -apple-system, "Segoe UI", sans-serif;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

html, body {
  margin: 0; padding: 0;
  height: 100%;
  overflow: hidden;
  background: var(--ink);
}

body {
  font-family: var(--sans);
  color: var(--bone);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ── 画布 ── */
#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
  touch-action: none;
}
#scene:active { cursor: grabbing; }
body.is-loading #scene { cursor: default; }

/* ── 宽银幕遮幅 ── */
.letterbox {
  position: fixed;
  left: 0; right: 0;
  height: clamp(24px, 5.2vh, 72px);
  background: var(--ink);
  z-index: 10;
  pointer-events: none;
  transition: transform 1.1s var(--ease);
}
.letterbox--top { top: 0; }
.letterbox--bottom { bottom: 0; }
body.is-loading .letterbox--top { transform: translateY(-100%); }
body.is-loading .letterbox--bottom { transform: translateY(100%); }

/* ════════════════════════════════════════════════════════════
   UI 容器
   ════════════════════════════════════════════════════════════ */
#ui {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
}
#ui > * { pointer-events: auto; }

/* ── 顶部标题 ── */
.hdr {
  position: absolute;
  top: calc(clamp(24px, 5.2vh, 72px) + clamp(18px, 3vh, 40px));
  left: var(--edge);
  right: var(--edge);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  pointer-events: none;
}

.hdr-title h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(32px, 5.2vw, 76px);
  line-height: 0.96;
  letter-spacing: 0.06em;
  text-indent: 0.06em;
  color: var(--bone);
  text-shadow: 0 2px 40px rgba(6, 10, 8, 0.6);
}

.hdr-title .hdr-sub {
  margin: clamp(8px, 1.2vh, 14px) 0 0;
  font-size: clamp(11px, 1vw, 13px);
  letter-spacing: 0.22em;
  color: var(--bone-dim);
}

/* 状态：时段 · 天气 · 季节 */
.hdr-status {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 16px;
  background: rgba(11, 16, 14, 0.42);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--bone-dim);
  white-space: nowrap;
  margin-top: 8px;
}

.status-item {
  transition: color 0.3s ease;
}
.status-item.is-flash {
  color: var(--accent);
}
.status-sep {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--bone-faint);
  flex: none;
}

/* ── 右下角控制条（演示 + 环境） ── */
.ctl-row {
  position: absolute;
  right: var(--edge);
  bottom: calc(clamp(24px, 5.2vh, 72px) + clamp(20px, 3.4vh, 40px));
  display: flex;
  align-items: center;
  gap: 10px;
  transition: right 0.55s var(--ease), opacity 0.3s ease;
}

/* 面板展开时，右下控制条整体让到面板左侧，避免压住面板内容 */
#ui.is-panel-open .ctl-row {
  right: calc(var(--panel-w) + var(--edge) * 0.6);
}

/* ── 面板开关按钮 ── */
.panel-toggle {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 12px 20px;
  background: rgba(11, 16, 14, 0.52);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--bone);
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: all 0.4s var(--ease);
}
.panel-toggle:hover {
  background: rgba(217, 160, 91, 0.16);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.panel-toggle:active { transform: translateY(0); }
.panel-toggle.is-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
}
.toggle-icon {
  width: 17px; height: 17px;
  display: block;
  color: var(--accent);
}
.toggle-icon svg { width: 100%; height: 100%; display: block; }

/* ── 自动演示按钮 ── */
.demo-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  background: rgba(11, 16, 14, 0.52);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--bone-dim);
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: all 0.4s var(--ease);
}
.demo-toggle:hover {
  background: rgba(217, 160, 91, 0.14);
  border-color: var(--accent);
  color: var(--bone);
  transform: translateY(-1px);
}
.demo-toggle.is-on {
  background: rgba(217, 160, 91, 0.18);
  border-color: var(--accent);
  color: var(--bone);
  box-shadow: 0 0 0 1px var(--accent-dim), 0 6px 26px -10px rgba(217, 160, 91, 0.55);
}
.demo-icon {
  width: 14px; height: 14px;
  display: block;
  color: var(--accent);
  flex: none;
}
.demo-icon svg { width: 100%; height: 100%; display: block; }

/* ── 演示 HUD：章节卡 + 进度条 ── */
.demo-hud {
  position: absolute;
  left: var(--edge);
  bottom: calc(clamp(24px, 5.2vh, 72px) + clamp(20px, 3.4vh, 40px));
  min-width: 230px;
  max-width: min(360px, 62vw);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  pointer-events: none;
}
.demo-hud.is-in {
  opacity: 1;
  transform: translateY(0);
}
.demo-hud-inner.is-swap { animation: demoSwap 0.75s var(--ease); }
@keyframes demoSwap {
  from { opacity: 0; transform: translateY(9px); filter: blur(3px); }
  to   { opacity: 1; transform: translateY(0); filter: blur(0); }
}
.demo-chapter-no {
  margin: 0 0 6px;
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 4px;
}
.demo-idx { font-size: 13px; }
.demo-sep { opacity: 0.45; }
.demo-total { opacity: 0.6; }
.demo-title {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1.15;
  color: var(--bone);
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.65);
}
.demo-sub {
  margin: 7px 0 0;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--bone-dim);
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.6);
}
.demo-bar {
  position: relative;
  margin-top: 14px;
  height: 2px;
  width: 100%;
  background: rgba(242, 233, 219, 0.16);
  border-radius: 2px;
  overflow: hidden;
}
.demo-bar i {
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform-origin: left center;
  transform: scaleX(0);
}

/* ════════════════════════════════════════════════════════════
   控制面板
   ════════════════════════════════════════════════════════════ */
.panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: var(--panel-w);
  background: linear-gradient(
    to left,
    rgba(10, 14, 12, 0.93) 0%,
    rgba(10, 14, 12, 0.86) 70%,
    rgba(10, 14, 12, 0.0) 100%
  );
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  border-left: 1px solid var(--line);
  padding: calc(clamp(24px, 5.2vh, 72px) + 20px) clamp(18px, 2.2vw, 30px) 32px;
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateX(100%);
  opacity: 0;
  visibility: hidden;
  transition:
    transform 0.55s var(--ease),
    opacity 0.4s ease,
    visibility 0s linear 0.55s;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}
.panel::-webkit-scrollbar { width: 4px; }
.panel::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: 2px;
}

.panel.is-open {
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
  transition:
    transform 0.55s var(--ease),
    opacity 0.4s ease,
    visibility 0s linear 0s;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 26px;
}
.panel-head h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 22px;
  letter-spacing: 0.16em;
  color: var(--bone);
}
.panel-close {
  width: 34px; height: 34px;
  display: grid;
  place-items: center;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--bone-dim);
  font-size: 19px;
  line-height: 1;
  cursor: pointer;
  transition: all 0.25s ease;
  padding: 0;
}
.panel-close:hover {
  color: var(--bone);
  border-color: var(--bone-dim);
  transform: rotate(90deg);
}

/* ── 分组 ── */
.group {
  margin-bottom: 26px;
}
.group h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.24em;
  color: var(--bone-faint);
}
.group h3 svg {
  width: 14px; height: 14px;
  flex: none;
  opacity: 0.85;
}

/* ── 选项按钮 ── */
.opts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 7px;
}
/* 天气有 5 项：均分一行，避免落单换行 */
.opts[data-group="weather"] {
  grid-template-columns: repeat(5, 1fr);
  gap: 5px;
}
.opts[data-group="weather"] .opt {
  padding: 10px 2px 8px;
  font-size: 11px;
}
.opts[data-group="weather"] .opt-icon {
  width: 15px;
  height: 15px;
}
.opts--wide {
  grid-template-columns: repeat(3, 1fr);
}

.opt {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 4px 9px;
  background: rgba(242, 233, 219, 0.035);
  border: 1px solid transparent;
  border-radius: 9px;
  color: var(--bone-dim);
  font-family: var(--sans);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: all 0.28s var(--ease);
  position: relative;
  overflow: hidden;
}

.opt::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 120%, var(--accent-dim), transparent 70%);
  opacity: 0;
  transition: opacity 0.35s ease;
}
.opt:hover {
  color: var(--bone);
  border-color: var(--line-strong);
  background: rgba(242, 233, 219, 0.06);
}
.opt:hover::before { opacity: 1; }

.opt.is-active {
  color: var(--bone);
  border-color: rgba(217, 160, 91, 0.55);
  background: rgba(217, 160, 91, 0.12);
}
.opt.is-active::before { opacity: 1; }

.opt-icon {
  width: 18px; height: 18px;
  display: block;
  position: relative;
  z-index: 1;
}
.opt-icon svg { width: 100%; height: 100%; display: block; }
.opt-label { position: relative; z-index: 1; }

.opt--text {
  padding: 11px 4px;
  font-size: 12px;
  letter-spacing: 0.1em;
}

/* ── 声音 ── */
.sound-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
  margin-bottom: 14px;
}
.sound-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 8px;
  background: rgba(242, 233, 219, 0.035);
  border: 1px solid transparent;
  border-radius: 9px;
  color: var(--bone-dim);
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all 0.28s var(--ease);
}
.sound-toggle .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--bone-faint);
  transition: all 0.3s ease;
  flex: none;
}
.sound-toggle[aria-pressed="true"] {
  color: var(--bone);
  border-color: rgba(217, 160, 91, 0.4);
  background: rgba(217, 160, 91, 0.09);
}
.sound-toggle[aria-pressed="true"] .dot {
  background: var(--accent);
  box-shadow: 0 0 8px rgba(217, 160, 91, 0.75);
}
.sound-toggle:hover {
  border-color: var(--line-strong);
  color: var(--bone);
}

/* ── 音量 ── */
.volume {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--bone-faint);
}
.volume input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 2px;
  background: var(--line-strong);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.volume input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: transform 0.2s ease;
}
.volume input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}
.volume input[type="range"]::-moz-range-thumb {
  width: 13px; height: 13px;
  border: none;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

/* ── 操作提示 ── */
.hints {
  position: absolute;
  left: 50%;
  bottom: calc(clamp(24px, 5.2vh, 72px) + clamp(14px, 2vh, 24px));
  transform: translate(-50%, 10px);
  display: flex;
  gap: 22px;
  margin: 0;
  opacity: 0;
  transition: opacity 1s ease, transform 1s var(--ease);
  pointer-events: none;
  white-space: nowrap;
}
.hints.is-in {
  opacity: 0.55;
  transform: translate(-50%, 0);
}
.hints p {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--bone-dim);
  display: flex;
  align-items: center;
  gap: 6px;
}
.hints kbd {
  display: inline-grid;
  place-items: center;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  font-family: var(--sans);
  font-size: 10px;
  color: var(--bone);
}

/* ════════════════════════════════════════════════════════════
   加载
   ════════════════════════════════════════════════════════════ */
.loader {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  background: var(--ink);
  transition: opacity 0.9s ease;
}
.loader.is-done {
  opacity: 0;
  pointer-events: none;
}
.loader-inner {
  width: min(230px, 50vw);
  text-align: center;
}
.loader-label {
  margin: 0 0 16px;
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.34em;
  text-indent: 0.34em;
  color: var(--bone-dim);
}
.loader-bar {
  position: relative;
  height: 1px;
  width: 100%;
  background: rgba(242, 233, 219, 0.14);
  overflow: hidden;
}
.loader-bar span {
  position: absolute;
  inset: 0;
  background: var(--bone);
  transform-origin: left center;
  transform: scaleX(0);
  animation: load-sweep 2.1s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}
@keyframes load-sweep {
  0%   { transform: scaleX(0); opacity: 1; }
  55%  { transform: scaleX(1); opacity: 1; }
  56%  { transform: scaleX(1); opacity: 0; }
  57%  { transform: scaleX(0); opacity: 0; }
  100% { transform: scaleX(0); opacity: 0; }
}

/* ════════════════════════════════════════════════════════════
   响应式
   ════════════════════════════════════════════════════════════ */
@media (max-width: 820px) {
  :root { --panel-w: 100vw; }

  .hdr {
    flex-direction: column;
    gap: 12px;
  }
  .hdr-status {
    align-self: flex-start;
    font-size: 11px;
    padding: 7px 13px;
  }
  .hdr-title h1 {
    font-size: clamp(28px, 9vw, 44px);
  }

  .panel {
    padding-top: calc(clamp(24px, 5.2vh, 72px) + 14px);
    background: rgba(10, 14, 12, 0.96);
  }

  .ctl-row {
    right: var(--edge);
    left: var(--edge);
    bottom: calc(clamp(24px, 5.2vh, 72px) + 14px);
    justify-content: space-between;
    gap: 8px;
  }
  /* 窄屏面板近乎满宽，控制条没有让位的空间 —— 面板展开时收起，靠面板自身的关闭键退出 */
  #ui.is-panel-open .ctl-row {
    right: var(--edge);
    opacity: 0;
    pointer-events: none;
  }
  .panel-toggle {
    padding: 10px 16px;
    font-size: 12px;
  }
  .demo-toggle {
    padding: 10px 14px;
    font-size: 12px;
    letter-spacing: 0.1em;
  }
  .demo-hud {
    left: var(--edge);
    right: var(--edge);
    bottom: calc(clamp(24px, 5.2vh, 72px) + 62px);
    max-width: none;
  }
  .demo-title { font-size: clamp(22px, 7vw, 30px); }

  .hints {
    display: none;
  }

  .opts { gap: 6px; }
  .opt { padding: 10px 3px 8px; font-size: 11px; }
  .opt-icon { width: 16px; height: 16px; }
}

@media (max-height: 620px) {
  .group { margin-bottom: 18px; }
  .panel { padding-top: 16px; }
}

/* ── 无障碍 ── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── 减少动态偏好 ── */
@media (prefers-reduced-motion: reduce) {
  .hdr, .panel, .panel-toggle, .opt, .loader, .letterbox, .hints {
    transition-duration: 0.01ms !important;
  }
  .loader-bar span { animation: none; transform: scaleX(1); }
  .panel-close:hover { transform: none; }
}