:root {
  --void: #01050a;
  --deep: #020812;
  --panel: rgba(4, 12, 22, 0.9);
  --line: rgba(90, 150, 190, 0.22);
  --line-strong: rgba(126, 200, 232, 0.45);
  --text: #c9dde8;
  --muted: #7a93a3;
  --ice: #9fd4ee;
  --accent: #4aa6d4;
  --danger: #8aa8b8;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(120% 80% at 50% 20%, #03101a 0%, var(--void) 70%);
  color: var(--text);
  font: 13px/1.45 "Segoe UI", "PingFang TC", "PingFang SC", "Microsoft JhengHei", "Microsoft YaHei", system-ui, sans-serif;
}

html[data-lang="en"] body,
html[lang="en"] body {
  font-family: "Segoe UI", "Helvetica Neue", system-ui, sans-serif;
}

body {
  min-height: 100vh;
}

.app {
  min-height: 100vh;
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: row;
  align-items: stretch;
  justify-content: center;
  gap: 14px;
  padding: 12px 12px 12px 16px;
}

.stage {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.canvas-frame {
  position: relative;
  width: min(100%, calc((100vh - 24px) * 16 / 9));
  max-height: calc(100vh - 24px);
  aspect-ratio: 16 / 9;
  background: #01050a;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(40, 80, 110, 0.25);
  touch-action: none;
}

.canvas-stage {
  position: relative;
  width: 100%;
  height: 100%;
}

#canvas-holder,
#canvas-holder canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
  cursor: crosshair;
}

.pattern-hint {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: auto;
  display: none;
  align-items: flex-end;
  justify-content: center;
  text-align: center;
  padding: 36px 24px 18px;
  color: #c5e4f4;
  letter-spacing: 0.06em;
  font-size: 13px;
  pointer-events: none !important;
  z-index: 2;
  background: linear-gradient(180deg, transparent, rgba(1, 5, 10, 0.82));
}

.pattern-hint.is-on {
  display: flex;
}

#canvas-holder {
  position: relative;
  z-index: 1;
}

.pattern-hint[hidden],
.toast[hidden],
.fps-badge[hidden],
.expand-btn[hidden],
.canvas-flash[hidden],
.review-overlay[hidden] {
  display: none !important;
}

.fps-badge-shift {
  top: 34px;
}

.fps-badge {
  position: absolute;
  left: 10px;
  top: 10px;
  font: 11px/1 ui-monospace, Consolas, monospace;
  color: #7ea9bc;
  background: rgba(2, 8, 16, 0.55);
  border: 1px solid var(--line);
  padding: 4px 7px;
  pointer-events: none;
}

.toast {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  max-width: 86%;
  padding: 8px 12px;
  background: rgba(8, 18, 28, 0.88);
  border: 1px solid var(--line-strong);
  color: var(--ice);
  font-size: 12px;
  pointer-events: none;
}

.panel {
  width: 332px;
  flex: 0 0 332px;
  max-height: calc(100vh - 24px);
  overflow: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 14px 14px 28px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

h1 {
  margin: 0;
  font-size: 16px;
  font-weight: 560;
  letter-spacing: 0.08em;
  color: #e7f4fb;
}

.sub {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.02em;
}

h2 {
  margin: 0 0 8px;
  font-size: 11px;
  font-weight: 550;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.block { margin-bottom: 12px; }

details {
  border-top: 1px solid var(--line);
  padding: 8px 0 10px;
}

summary {
  cursor: pointer;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ice);
  padding: 4px 0;
}

summary::-webkit-details-marker { display: none; }

summary::after {
  content: "▾";
  float: right;
  color: var(--muted);
  font-size: 10px;
}

details:not([open]) summary::after { content: "▸"; }

.note, .foot {
  color: var(--muted);
  font-size: 11px;
  margin: 6px 0 10px;
}

.foot { margin-top: 16px; }

.seg {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.mode-seg {
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
}

.mode-seg .seg-btn {
  padding: 8px 4px;
  font-size: 12px;
  letter-spacing: 0.02em;
  text-align: center;
}

.lang-seg {
  margin: 0 0 14px;
}

.seg-btn,
button,
.file-btn {
  font: inherit;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--line);
  padding: 8px 10px;
  cursor: pointer;
  letter-spacing: 0.04em;
}

.seg-btn.is-on,
button.primary {
  border-color: var(--line-strong);
  color: #eaf7ff;
  background: rgba(20, 70, 100, 0.35);
}

button.ghost,
.file-btn {
  width: 100%;
  margin: 0 0 8px;
  background: rgba(255, 255, 255, 0.02);
}

.file-btn.pattern-upload {
  border-color: var(--line-strong);
  color: #eaf7ff;
  background: rgba(20, 70, 100, 0.35);
}

button:hover,
.file-btn:hover,
.seg-btn:hover {
  border-color: var(--line-strong);
  color: #eaf7ff;
}

.icon-btn {
  padding: 6px 8px;
  font-size: 11px;
  color: var(--muted);
  border-color: transparent;
}

.file-btn {
  display: block;
  text-align: center;
  position: relative;
}

.file-btn input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.ctrl {
  display: grid;
  gap: 4px;
  margin: 8px 0;
}

.ctrl > span {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--text);
}

.ctrl b {
  font-weight: 500;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.ctrl.color {
  grid-template-columns: 1fr auto;
  align-items: center;
}

select,
input[type="color"] {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: #071018;
  border: 1px solid var(--line);
  padding: 6px 8px;
}

input[type="color"] {
  width: 42px;
  height: 28px;
  padding: 2px;
  cursor: pointer;
}

input[type="range"] {
  width: 100%;
  appearance: none;
  height: 2px;
  background: #163044;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #b7e3f6;
  border: 1px solid #6aa9c6;
  cursor: pointer;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 0;
  color: var(--text);
}

.preset-row,
.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin: 8px 0;
}

.preset-row button,
.btn-row button { margin: 0; }

.expand-btn {
  position: fixed;
  right: 14px;
  top: 14px;
  z-index: 5;
  background: var(--panel);
}

.fs-btn {
  position: absolute;
  right: 10px;
  top: 10px;
  z-index: 4;
  width: auto;
  margin: 0;
  padding: 5px 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: #c5e4f4;
  background: rgba(2, 8, 16, 0.55);
  border: 1px solid var(--line);
  cursor: pointer;
}

.fs-btn:hover {
  border-color: var(--line-strong);
  color: #eaf7ff;
}

.canvas-frame:fullscreen,
.canvas-frame:-webkit-full-screen {
  width: 100vw;
  height: 100vh;
  max-height: none;
  aspect-ratio: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  box-shadow: none;
}

.canvas-frame:fullscreen .fs-btn,
.canvas-frame:-webkit-full-screen .fs-btn {
  display: none;
}

.canvas-frame:fullscreen .canvas-stage,
.canvas-frame:-webkit-full-screen .canvas-stage {
  width: min(100vw, calc(100vh * 16 / 9));
  height: min(100vh, calc(100vw * 9 / 16));
}

.canvas-flash {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background: rgba(214, 238, 252, 0.2);
}

.canvas-frame:focus,
.canvas-frame:focus-visible,
#canvas-holder canvas:focus {
  outline: none;
}

.capture-hud {
  position: absolute;
  left: 10px;
  bottom: 10px;
  z-index: 4;
  width: auto;
  margin: 0;
  font: 11px/1.3 ui-monospace, Consolas, monospace;
  letter-spacing: 0.08em;
  color: #9fc4d6;
  background: rgba(2, 8, 16, 0.55);
  border: 1px solid var(--line);
  padding: 4px 8px;
  pointer-events: auto;
  cursor: pointer;
}

.capture-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin: 8px 0 10px;
}

.capture-slot {
  position: relative;
  aspect-ratio: 16 / 9;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: rgba(1, 6, 12, 0.7);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.capture-slot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.capture-slot.is-on {
  border-color: var(--line-strong);
  box-shadow: 0 0 0 1px rgba(126, 200, 232, 0.35);
}

.review-overlay {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(1, 5, 10, 0.82);
}

.review-sheet {
  width: min(980px, 100%);
  max-height: calc(100vh - 48px);
  overflow: auto;
  padding: 18px 18px 16px;
  background: var(--panel);
  border: 1px solid var(--line-strong);
}

.review-sheet h2 {
  margin: 0 0 6px;
  font-size: 14px;
  letter-spacing: 0.14em;
  color: #e7f4fb;
  text-transform: none;
}

.review-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 12px 0 16px;
}

.review-card {
  position: relative;
  margin: 0;
  padding: 0;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #01050a;
}

.review-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.review-card.is-on {
  border-color: var(--line-strong);
  box-shadow: 0 0 0 1px rgba(126, 200, 232, 0.45);
}

.review-card .review-num {
  position: absolute;
  left: 8px;
  top: 8px;
  font-size: 11px;
  color: #c5e4f4;
  background: rgba(2, 8, 16, 0.7);
  padding: 2px 6px;
  pointer-events: none;
}

.review-empty {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 12px;
  margin: 8px 0;
}

.review-size {
  margin: 0 0 12px;
}

.review-size select {
  margin-top: 4px;
}

.review-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.review-actions .primary {
  grid-column: 1 / -1;
}

#btn-review-close {
  grid-column: 1 / -1;
}

.review-actions button {
  margin: 0;
}

.review-actions button:disabled,
.capture-slot:disabled {
  opacity: 0.4;
  cursor: default;
}

.canvas-frame:fullscreen .capture-hud,
.canvas-frame:-webkit-full-screen .capture-hud {
  display: block;
}

.hand-preview-wrap {
  margin: 8px 0 0;
  border: 1px solid var(--line);
  background: #000;
  line-height: 0;
  overflow: hidden;
  position: relative;
}

#hand-cam-preview {
  width: 100%;
  height: auto;
  max-height: 148px;
  object-fit: cover;
  transform: scaleX(-1);
  display: block;
}

#hand-mask-overlay {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  transform: scaleX(-1);
}
.app.is-collapsed {
  padding-right: 16px;
}

@media (max-width: 860px) {
  .app {
    flex-direction: column;
    align-items: center;
    height: auto;
    overflow: auto;
    padding: 12px;
  }
  .canvas-frame {
    width: min(100%, calc((100vh - 200px) * 16 / 9));
  }
  .panel {
    width: min(920px, 100%);
    flex-basis: auto;
    max-height: none;
  }
}