:root {
  color-scheme: light;
  --bamboo: #2DB146;
  --bamboo-deep: #1f8c36;
  --bamboo-soft: #e8f5ec;
  --bamboo-line: #cfe8d6;
  --accent: #1A1A1A;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #f7faf8;
  --panel: #ffffff;
  --danger: #c0392b;
  --warning: #c98a16;
  --radius: 10px;
  --radius-sm: 6px;
  --radius-pill: 999px;
  --shadow: 0 1px 3px rgba(15, 30, 20, 0.06), 0 2px 12px rgba(15, 30, 20, 0.04);
  --transition: .15s ease;
  --font: ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Kailasa",
    "Microsoft Himalaya", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue",
    Arial, sans-serif;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", Consolas, "Courier New", monospace;
}

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

html,
body {
  height: 100%;
  margin: 0;
}

body {
  overflow-x: hidden;
  background: var(--bg);
  color: var(--accent);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
}

h1,
h2,
p {
  margin: 0;
}

h1,
h2 {
  font-weight: 600;
  letter-spacing: -.01em;
}

h1 {
  font-size: 18px;
}

h2 {
  font-size: 14px;
}

button,
.file-button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--accent);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  touch-action: manipulation;
}

button:hover:not(:disabled),
.file-button:hover {
  background: #f3f4f6;
  border-color: #d1d5db;
}

button:disabled {
  cursor: not-allowed;
  opacity: .45;
}

.primary {
  border-color: transparent;
  background: var(--bamboo);
  color: #ffffff;
}

.primary:hover:not(:disabled) {
  background: var(--bamboo-deep);
}

#exportButton:not(:disabled) {
  border-color: var(--bamboo-line);
  background: var(--bamboo-soft);
  color: var(--bamboo-deep);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
  padding: 10px max(18px, env(safe-area-inset-right)) 10px max(18px, env(safe-area-inset-left));
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-img {
  width: 24px;
  height: 56px;
  object-fit: contain;
  display: block;
  flex: 0 0 auto;
}

.brand-title {
  font-weight: 700;
  font-size: 16px;
  line-height: 1.2;
}

.brand-title .latin {
  color: var(--muted);
  font-weight: 500;
  margin-left: 6px;
}

.brand-sub {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

.language-picker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 30px;
  padding: 3px 8px;
  border: 1px solid var(--bamboo-line);
  border-radius: var(--radius-pill);
  background: #ffffff;
  color: var(--accent);
}

.language-icon {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.language-picker select {
  min-width: 92px;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 12px;
  font-weight: 500;
  outline: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}

.badge-muted {
  color: var(--muted);
  background: #f3f4f6;
}

.current-time {
  color: var(--accent);
  background: #ffffff;
  border-color: var(--bamboo-line);
  font-variant-numeric: tabular-nums;
}

.status.ready {
  color: var(--bamboo-deep);
  background: var(--bamboo-soft);
  border-color: var(--bamboo-line);
}

.app-shell {
  display: grid;
  grid-template-columns: clamp(210px, 22vw, 300px) minmax(300px, 1fr) clamp(220px, 24vw, 320px);
  min-height: calc(100vh - 72px);
}

.workspace {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 10px;
  min-height: calc(100vh - 72px);
  padding: 14px;
}

.stage {
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 560px;
  border: 1px solid #111827;
  border-radius: var(--radius);
  background: #050806;
  box-shadow: var(--shadow);
  isolation: isolate;
}

.stage-controls {
  position: relative;
  z-index: 1;
  width: 100%;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  padding: 8px;
  border-color: var(--bamboo-line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.stage-controls button,
.stage-controls .file-button {
  min-height: 40px;
  background: transparent;
}

.stage-controls .primary {
  background: var(--bamboo);
}

#camera,
#photo,
#overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#camera,
#photo {
  display: none;
  object-fit: contain;
}

#overlay {
  z-index: 2;
  pointer-events: none;
}

.empty-state {
  display: grid;
  gap: 8px;
  max-width: 360px;
  padding: 28px;
  text-align: center;
  color: rgba(255, 255, 255, .68);
}

.empty-state strong {
  color: #ffffff;
  font-size: 24px;
  font-weight: 600;
}

.hud {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: calc(100vh - 72px);
  padding: 14px;
  background: var(--bg);
}

.hud-left {
  border-right: 1px solid var(--line);
  padding-left: max(14px, env(safe-area-inset-left));
}

.hud-right {
  border-left: 1px solid var(--line);
  padding-right: max(14px, env(safe-area-inset-right));
}

.controls,
.readout,
.status-card,
.guidance {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.controls {
  grid-template-columns: 1fr;
}

.file-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.meter {
  display: grid;
  gap: 6px;
  padding: 12px;
  border: 1px solid var(--bamboo-line);
  border-radius: var(--radius-sm);
  background: var(--bamboo-soft);
}

.meter span,
.grid span,
.guidance li {
  color: var(--muted);
}

.meter strong {
  color: var(--bamboo-deep);
  font-family: var(--mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
}

.grid {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fafdfb;
}

.grid div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}

.grid div:last-child {
  border-bottom: 0;
}

.grid strong {
  flex: 0 0 auto;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 600;
}

.assessment {
  min-height: 44px;
  padding: 10px 12px;
  border-left: 3px solid var(--bamboo);
  border-radius: 8px;
  background: #fafdfb;
  color: var(--accent);
  line-height: 1.55;
}

.assessment.warn {
  border-left-color: var(--warning);
  background: #fff8e8;
  color: var(--warning);
}

.assessment.alert {
  border-left-color: var(--danger);
  background: #fceae6;
  color: var(--danger);
}

.guidance ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 18px;
}

@media (max-width: 980px) and (min-width: 701px) {
  .app-shell {
    grid-template-columns: clamp(190px, 24vw, 250px) minmax(280px, 1fr) clamp(190px, 26vw, 260px);
  }

  .topbar {
    align-items: flex-start;
  }

  .topbar-actions {
    max-width: 260px;
  }

  .workspace,
  .hud {
    padding: 10px;
  }

  .controls,
  .readout,
  .status-card,
  .guidance {
    padding: 10px;
  }

  .meter strong {
    font-size: 38px;
  }

  .grid div {
    display: grid;
    gap: 4px;
    min-height: 58px;
  }
}

@media (max-width: 700px) {
  .topbar {
    position: relative;
    align-items: flex-start;
  }

  .topbar-actions {
    justify-content: flex-start;
  }

  .app-shell {
    grid-template-columns: 1fr 1fr;
  }

  .workspace {
    order: 1;
    grid-column: 1 / -1;
    min-height: 56vh;
  }

  .stage {
    min-height: 54vh;
  }

  .stage-controls {
    width: 100%;
  }

  .hud {
    min-height: auto;
    border: 0;
  }

  .hud-left {
    order: 2;
    padding-right: 7px;
  }

  .hud-right {
    order: 3;
    padding-left: 7px;
  }
}

@media (max-width: 520px) {
  .topbar {
    display: grid;
  }

  .brand-title .latin {
    display: block;
    margin-left: 0;
  }

  .app-shell {
    grid-template-columns: 1fr;
  }

  .stage-controls {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .workspace,
  .hud-left,
  .hud-right {
    grid-column: 1;
    padding-left: 12px;
    padding-right: 12px;
  }
}