/* ============================================================
   积木工坊 · Brick Studio
   ============================================================ */

:root {
  --bg: #000000;
  --fg: #ededf0;
  --dim: rgba(237, 237, 240, .50);
  --panel: rgba(17, 17, 19, .76);
  --panel-2: rgba(255, 255, 255, .045);
  --line: rgba(255, 255, 255, .085);
  --line-strong: rgba(255, 255, 255, .18);
  --chip: rgba(255, 255, 255, .06);
  --chip-hi: rgba(255, 255, 255, .12);
  --accent: #ffd23f;
  --accent-ink: #1b1400;
  --danger: #ff5257;
  --shadow: 0 26px 70px rgba(0, 0, 0, .65), 0 0 0 .5px rgba(255, 255, 255, .045);
  --radius: 18px;
  --pick: #c91a09;
}

[data-theme="light"] {
  --bg: #ffffff;
  --fg: #141416;
  --dim: rgba(20, 20, 22, .52);
  --panel: rgba(255, 255, 255, .82);
  --panel-2: rgba(0, 0, 0, .035);
  --line: rgba(0, 0, 0, .09);
  --line-strong: rgba(0, 0, 0, .2);
  --chip: rgba(0, 0, 0, .045);
  --chip-hi: rgba(0, 0, 0, .09);
  --accent: #f0a500;
  --accent-ink: #1b1400;
  --danger: #e5484d;
  --shadow: 0 22px 60px rgba(0, 0, 0, .14), 0 0 0 .5px rgba(0, 0, 0, .05);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  user-select: none;
  transition: background .35s ease, color .35s ease;
}

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: crosshair;
}

#scene.is-orbiting { cursor: grabbing; }
#scene.is-erasing  { cursor: not-allowed; }

/* ---------------- 通用玻璃 ---------------- */

.glass {
  background: var(--panel);
  backdrop-filter: blur(26px) saturate(150%);
  -webkit-backdrop-filter: blur(26px) saturate(150%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10;
}

.hud > * { pointer-events: auto; }

/* ---------------- 品牌 ---------------- */

.brand {
  position: absolute;
  top: 18px;
  left: 22px;
  display: flex;
  align-items: center;
  gap: 11px;
  height: 44px;
  padding: 0 16px 0 10px;
  border-radius: 14px;
  background: var(--panel);
  backdrop-filter: blur(26px) saturate(150%);
  -webkit-backdrop-filter: blur(26px) saturate(150%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.logo {
  width: 26px;
  height: 26px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
  padding: 3px;
  border-radius: 8px;
  background: linear-gradient(145deg, #ffd93b, #ff8a00);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, .6), 0 2px 6px rgba(255, 138, 0, .35);
}

.logo i { border-radius: 50%; background: rgba(0, 0, 0, .34); display: block; }

.brand-txt { display: flex; flex-direction: column; line-height: 1.15; }
.brand-txt strong { font-size: 13.5px; letter-spacing: .04em; font-weight: 700; }
.brand-txt small {
  font-size: 8.5px;
  letter-spacing: .18em;
  color: var(--dim);
  font-weight: 600;
  margin-top: 2px;
}

/* ---------------- 工具条 ---------------- */

.toolbar {
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px;
  border-radius: 15px;
  background: var(--panel);
  backdrop-filter: blur(26px) saturate(150%);
  -webkit-backdrop-filter: blur(26px) saturate(150%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.tb {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 34px;
  min-width: 34px;
  padding: 0 9px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--fg);
  font: inherit;
  font-size: 12px;
  font-weight: 550;
  cursor: pointer;
  transition: background .16s ease, color .16s ease, transform .1s ease;
}

.tb:hover { background: var(--chip-hi); }
.tb:active { transform: scale(.95); }
.tb.on { background: var(--accent); color: var(--accent-ink); }
.tb svg { width: 17px; height: 17px; stroke: currentColor; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.tb[disabled] { opacity: .32; pointer-events: none; }

.tb-div { width: 1px; height: 20px; background: var(--line-strong); margin: 0 4px; }

/* ---------------- 视角立方体 ---------------- */

.viewbox {
  position: absolute;
  top: 18px;
  right: 22px;
  width: 132px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#cubeSlot {
  position: relative;
  width: 132px;
  height: 132px;
  border-radius: 16px;
  /* 立方体由 WebGL 直接画在这个区域内，因此这里不能有模糊/底色，否则会被糊掉 */
  background: transparent;
  border: 1px solid var(--line);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .02);
  cursor: grab;
  touch-action: none;
}

[data-theme="light"] #cubeSlot {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .6);
}

#cubeSlot.dragging { cursor: grabbing; }

.viewkeys {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 5px;
  border-radius: 13px;
  background: var(--panel);
  backdrop-filter: blur(26px) saturate(150%);
  -webkit-backdrop-filter: blur(26px) saturate(150%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.viewkeys button {
  height: 24px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--dim);
  font: inherit;
  font-size: 10px;
  font-weight: 650;
  letter-spacing: .02em;
  cursor: pointer;
  transition: .15s;
}

.viewkeys button:hover { background: var(--chip-hi); color: var(--fg); }

/* ---------------- 积木库 ---------------- */

.sidepanel {
  position: absolute;
  top: 78px;
  left: 22px;
  width: 272px;
  max-height: calc(100vh - 78px - 96px);
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(26px) saturate(150%);
  -webkit-backdrop-filter: blur(26px) saturate(150%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.sp-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 16px 9px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .05em;
}

.sp-head .cnt { font-size: 10px; font-weight: 600; color: var(--dim); letter-spacing: .02em; }

.cats {
  display: flex;
  gap: 3px;
  padding: 0 12px 10px;
  border-bottom: 1px solid var(--line);
}

.cat {
  flex: 1;
  height: 27px;
  border: 0;
  border-radius: 8px;
  background: var(--chip);
  color: var(--dim);
  font: inherit;
  font-size: 10.5px;
  font-weight: 650;
  cursor: pointer;
  transition: .15s;
}

.cat:hover { color: var(--fg); background: var(--chip-hi); }
.cat.on { background: var(--accent); color: var(--accent-ink); }

.pieces {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
  padding: 11px;
  overflow-y: auto;
  overscroll-behavior: contain;
  flex: 1 1 auto;
  min-height: 132px;
}

.pieces::-webkit-scrollbar { width: 7px; }
.pieces::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 4px; }
.pieces::-webkit-scrollbar-track { background: transparent; }

.piece {
  position: relative;
  height: 78px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 4px 4px 3px;
  border-radius: 11px;
  background: linear-gradient(165deg, rgba(255, 255, 255, .062), rgba(255, 255, 255, .012));
  border: 1px solid rgba(255, 255, 255, .05);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05);
  cursor: grab;
  transition: background .16s, border-color .16s, transform .14s, box-shadow .16s;
}

.piece:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, .18);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .08), 0 8px 18px rgba(0, 0, 0, .38);
}

.piece:active { cursor: grabbing; transform: translateY(0) scale(.97); }

.piece.on {
  border-color: var(--accent);
  background: linear-gradient(165deg, rgba(255, 210, 63, .18), rgba(255, 210, 63, .04));
  box-shadow: 0 0 0 3px rgba(255, 210, 63, .12), inset 0 1px 0 rgba(255, 255, 255, .12);
}

[data-theme="light"] .piece {
  background: linear-gradient(165deg, rgba(0, 0, 0, .035), rgba(0, 0, 0, .008));
  border-color: rgba(0, 0, 0, .06);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .85);
}

[data-theme="light"] .piece:hover {
  border-color: rgba(0, 0, 0, .18);
  box-shadow: 0 8px 18px rgba(0, 0, 0, .1);
}

.thumb {
  width: 100%;
  height: 55px;
  display: block;
  pointer-events: none;
}

.piece .num {
  margin-top: 1px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
}

.piece.on .num { color: var(--fg); }

.sp-foot {
  border-top: 1px solid var(--line);
  padding: 10px 13px 13px;
}

.sp-foot .lbl {
  font-size: 9px;
  letter-spacing: .14em;
  color: var(--dim);
  font-weight: 700;
  margin-bottom: 8px;
}

.colors {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 6px;
}

.sw {
  aspect-ratio: 1;
  border-radius: 7px;
  border: 0;
  padding: 0;
  cursor: pointer;
  position: relative;
  transition: transform .13s, box-shadow .13s;
  box-shadow:
    inset 0 -2px 3px rgba(0, 0, 0, .34),
    inset 0 2px 2px rgba(255, 255, 255, .4);
}

.sw:hover { transform: scale(1.13); }

.sw.on::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 9px;
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 2px rgba(0, 0, 0, .3), 0 0 10px rgba(255, 210, 63, .35);
}

/* ---------------- 状态栏 ---------------- */

.statusbar {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 14px;
  height: 36px;
  padding: 0 16px;
  border-radius: 12px;
  background: var(--panel);
  backdrop-filter: blur(26px) saturate(150%);
  -webkit-backdrop-filter: blur(26px) saturate(150%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  font-size: 11px;
  color: var(--dim);
  white-space: nowrap;
}

.statusbar b { color: var(--fg); font-weight: 650; font-variant-numeric: tabular-nums; }
.statusbar .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--line-strong); }
.statusbar .st-hi { color: var(--accent); }

.hints {
  position: absolute;
  right: 22px;
  bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  align-items: flex-end;
  font-size: 10px;
  color: var(--dim);
  letter-spacing: .01em;
  pointer-events: none;
  text-align: right;
}

.hints kbd {
  display: inline-block;
  min-width: 17px;
  padding: 1px 5px;
  margin: 0 2px;
  border-radius: 4px;
  background: var(--chip);
  border: 1px solid var(--line);
  font: inherit;
  font-size: 9px;
  font-weight: 700;
  color: var(--fg);
  text-align: center;
}

/* ---------------- Toast ---------------- */

.toast {
  position: fixed;
  top: 74px;
  left: 50%;
  transform: translate(-50%, -8px);
  padding: 8px 15px;
  border-radius: 10px;
  background: var(--panel);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--fg);
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s ease, transform .22s ease;
  z-index: 40;
  white-space: nowrap;
}

.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------------- 拖拽幽灵光标 ---------------- */

body.is-dragging-piece #scene { cursor: copy; }

.drag-tag {
  position: fixed;
  z-index: 60;
  pointer-events: none;
  padding: 5px 9px;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .03em;
  transform: translate(14px, 14px);
  opacity: 0;
  transition: opacity .12s;
}

.drag-tag.show { opacity: 1; }

/* ---------------- 拖放导入 ---------------- */

.drop-hint {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, .58);
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease;
}

[data-theme="light"] .drop-hint { background: rgba(255, 255, 255, .6); }

.drop-hint.show { opacity: 1; }

.drop-hint .box {
  padding: 30px 52px;
  border: 2px dashed var(--accent);
  border-radius: 20px;
  background: var(--panel);
  box-shadow: var(--shadow);
  text-align: center;
}

.drop-hint .dh-title { font-size: 15px; font-weight: 700; letter-spacing: .02em; }
.drop-hint .dh-sub { margin-top: 7px; font-size: 11px; color: var(--dim); letter-spacing: .04em; }

/* ---------------- 确认弹窗 ---------------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, .55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease;
}

[data-theme="light"] .modal { background: rgba(255, 255, 255, .58); }

.modal.show { opacity: 1; pointer-events: auto; }

.modal-card {
  width: 324px;
  max-width: calc(100vw - 40px);
  padding: 26px 26px 20px;
  border-radius: 18px;
  background: var(--panel);
  backdrop-filter: blur(26px) saturate(150%);
  -webkit-backdrop-filter: blur(26px) saturate(150%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  text-align: center;
  transform: scale(.94) translateY(8px);
  transition: transform .24s cubic-bezier(.2, .9, .3, 1.25);
}

.modal.show .modal-card { transform: scale(1) translateY(0); }

.modal-ico {
  width: 44px;
  height: 44px;
  margin: 0 auto 13px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: rgba(255, 82, 87, .14);
  color: var(--danger);
}

[data-theme="light"] .modal-ico { background: rgba(229, 72, 77, .1); }

.modal-ico svg {
  width: 21px;
  height: 21px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.modal-title {
  margin: 0 0 9px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
}

.modal-text {
  margin: 0 0 20px;
  font-size: 11.5px;
  line-height: 1.8;
  color: var(--dim);
}

.modal-text b {
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}

.modal-text kbd {
  display: inline-block;
  padding: 1px 4px;
  margin: 0 1px;
  border-radius: 4px;
  background: var(--chip);
  border: 1px solid var(--line);
  font-size: 9.5px;
  font-weight: 700;
  color: var(--fg);
}

.modal-actions { display: flex; gap: 8px; }

.mbtn {
  flex: 1;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--chip);
  color: var(--fg);
  font: inherit;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, filter .15s, transform .1s;
}

.mbtn:hover { background: var(--chip-hi); }
.mbtn:active { transform: scale(.97); }

.mbtn.danger {
  border-color: transparent;
  background: var(--danger);
  color: #fff;
}

.mbtn.danger:hover { filter: brightness(1.08); }

/* ---------------- 响应式 ---------------- */

@media (max-width: 1180px) {
  .toolbar { padding: 5px; }
  .tb span.lbl { display: none; }
  .tb { padding: 0 8px; }
}

@media (max-width: 940px) {
  .brand { display: none; }
  .viewbox { width: 104px; }
  #cubeSlot { width: 104px; height: 104px; }
  .hints { display: none; }
  .sidepanel { width: 214px; }
}