/* ── Quick Sketches ── */
:root {
  --qs-accent: var(--wn-accent, #635bff);
  --qs-accent-hover: var(--wn-accent-hover, #4f46e5);
  --qs-surface: var(--wn-surface, #ffffff);
  --qs-border: var(--wn-border, #e5e5ea);
  --qs-radius: var(--wn-radius, 10px);
  --qs-font: var(--wn-font, 'Inter', system-ui, -apple-system, sans-serif);
  --qs-text: var(--wn-text, #1c1c1e);
  --qs-muted: #86868b;
  --qs-danger: #ef4444;
  --qs-toolbar-bg: rgba(255, 255, 255, 0.92);
  --qs-toolbar-blur: saturate(180%) blur(16px);
  --qs-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --qs-shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
}

* { box-sizing: border-box; }

/* ── App layout ── */
.qs-app {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 68px);
  min-height: 420px;
  font-family: var(--qs-font);
  color: var(--qs-text);
  overflow: hidden;
}

/* ── Toolbar ── */
.qs-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: var(--qs-toolbar-bg);
  -webkit-backdrop-filter: var(--qs-toolbar-blur);
  backdrop-filter: var(--qs-toolbar-blur);
  border: 1px solid var(--qs-border);
  border-radius: var(--qs-radius);
  margin-bottom: 8px;
  box-shadow: var(--qs-shadow);
  z-index: 10;
  flex-shrink: 0;
}

.qs-group {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.qs-divider {
  width: 1px;
  height: 28px;
  background: var(--qs-border);
  flex-shrink: 0;
}

/* ── Tool buttons ── */
.qs-tool-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1.5px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--qs-text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  padding: 0;
  flex-shrink: 0;
}
.qs-tool-btn:hover {
  background: rgba(0, 0, 0, 0.04);
}
.qs-tool-btn.active {
  background: rgba(99, 91, 255, 0.10);
  border-color: var(--qs-accent);
  color: var(--qs-accent);
}
.qs-tool-btn:disabled {
  opacity: 0.35;
  cursor: default;
}
.qs-tool-btn:disabled:hover {
  background: transparent;
}

.qs-danger-btn:hover:not(:disabled) {
  color: var(--qs-danger);
}

.qs-tool-label {
  display: none;
}

/* ── Size slider ── */
.qs-size-group {
  gap: 6px;
}
.qs-field-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--qs-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.qs-size-group input[type="range"] {
  width: 80px;
  accent-color: var(--qs-accent);
}
.qs-size-val {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--qs-text);
  min-width: 22px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* ── Color picker ── */
.qs-color-swatch {
  width: 34px;
  height: 34px;
  border: 2px solid var(--qs-border);
  border-radius: 8px;
  padding: 0;
  cursor: pointer;
  background: transparent;
}
.qs-color-swatch::-webkit-color-swatch-wrapper {
  padding: 2px;
}
.qs-color-swatch::-webkit-color-swatch {
  border: none;
  border-radius: 4px;
}
.qs-color-swatch::-moz-color-swatch {
  border: none;
  border-radius: 4px;
}
.qs-hex-input {
  width: 80px;
  border: 1px solid var(--qs-border);
  border-radius: 8px;
  padding: 6px 8px;
  font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
  font-size: 0.82rem;
  color: var(--qs-text);
  text-align: center;
  background: var(--qs-surface);
}
.qs-hex-input:focus {
  outline: none;
  border-color: var(--qs-accent);
  box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.1);
}

/* ── Line style select ── */
.qs-select {
  border: 1px solid var(--qs-border);
  border-radius: 8px;
  padding: 6px 10px;
  font-family: var(--qs-font);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--qs-text);
  background: var(--qs-surface);
  cursor: pointer;
  appearance: auto;
}
.qs-select:focus {
  outline: none;
  border-color: var(--qs-accent);
  box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.1);
}

/* ── Fill checkbox ── */
.qs-checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--qs-text);
  cursor: pointer;
  white-space: nowrap;
  padding: 0 2px;
}
.qs-checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--qs-accent);
  cursor: pointer;
  margin: 0;
}

/* ── Canvas text input (inline typing) ── */
.qs-canvas-text-input {
  position: absolute;
  z-index: 5;
  border: none;
  border-bottom: 2px solid var(--qs-accent);
  background: transparent;
  outline: none;
  padding: 2px 4px;
  min-width: 40px;
  max-width: 90%;
  caret-color: var(--qs-accent);
}

/* ── Export button ── */
.qs-export-btn {
  border: none;
  border-radius: 8px;
  padding: 8px 16px;
  background: var(--qs-accent);
  color: #fff;
  font-family: var(--qs-font);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
}
.qs-export-btn:hover {
  background: var(--qs-accent-hover);
}

/* ── Save As overlay + dialog ── */
.qs-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.30);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.qs-overlay.qs-overlay-open {
  opacity: 1;
  pointer-events: auto;
}
.qs-save-dialog {
  background: var(--qs-surface);
  border-radius: 14px;
  box-shadow: var(--qs-shadow-lg);
  padding: 28px 28px 20px;
  width: 340px;
  max-width: calc(100vw - 32px);
}
.qs-save-dialog-title {
  margin: 0 0 18px;
  font-family: var(--qs-font);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--qs-text);
}
.qs-save-dialog-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--qs-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 5px;
}
.qs-save-dialog-input {
  width: 100%;
  border: 1px solid var(--qs-border);
  border-radius: 8px;
  padding: 8px 10px;
  font-family: var(--qs-font);
  font-size: 0.9rem;
  color: var(--qs-text);
  background: var(--qs-surface);
  margin-bottom: 14px;
}
.qs-save-dialog-input:focus {
  outline: none;
  border-color: var(--qs-accent);
  box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.1);
}
.qs-save-dialog .qs-select {
  width: 100%;
  margin-bottom: 20px;
  padding: 8px 10px;
}
.qs-save-dialog-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}
.qs-save-dialog-btn {
  border: none;
  border-radius: 8px;
  padding: 9px 20px;
  font-family: var(--qs-font);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.qs-save-dialog-cancel {
  background: transparent;
  color: var(--qs-muted);
}
.qs-save-dialog-cancel:hover {
  background: rgba(0, 0, 0, 0.04);
  color: var(--qs-text);
}
.qs-save-dialog-confirm {
  background: var(--qs-accent);
  color: #fff;
}
.qs-save-dialog-confirm:hover {
  background: var(--qs-accent-hover);
}

/* ── Canvas wrapper ── */
.qs-canvas-wrap {
  flex: 1;
  position: relative;
  border: 1px solid var(--qs-border);
  border-radius: var(--qs-radius);
  overflow: hidden;
  touch-action: none;
  cursor: crosshair;
  background: #fff;
}
.qs-canvas-wrap canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* ── FAB sheet toggle (hidden on desktop) ── */
.qs-sheet-toggle {
  display: none;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Mobile bottom sheet (< 768px)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
@media (max-width: 767px) {
  .qs-app {
    height: calc(100vh - var(--wn-topbar-h, 52px));
  }

  .qs-toolbar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 14px 16px;
    padding-bottom: calc(14px + env(safe-area-inset-bottom, 0px));
    border-radius: 18px 18px 0 0;
    border: none;
    border-top: 1px solid var(--qs-border);
    box-shadow: var(--qs-shadow-lg);
    margin-bottom: 0;
    z-index: 100;
    transform: translateY(calc(100% - 56px));
    transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    max-height: 70vh;
  }
  .qs-toolbar.qs-sheet-open {
    transform: translateY(0);
  }

  .qs-group {
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
  }

  .qs-divider {
    width: 100%;
    height: 1px;
  }

  .qs-tool-label {
    display: inline;
    font-size: 0.72rem;
    font-weight: 600;
    margin-left: 4px;
  }
  .qs-tool-btn {
    width: auto;
    height: 38px;
    padding: 0 10px;
    gap: 2px;
  }

  .qs-size-group input[type="range"] {
    width: 120px;
  }

  .qs-canvas-wrap {
    margin-bottom: 60px;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  .qs-sheet-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    bottom: 64px;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: var(--qs-accent);
    color: #fff;
    box-shadow: var(--qs-shadow-lg);
    z-index: 101;
    cursor: pointer;
    transition: transform 0.2s, bottom 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .qs-sheet-toggle.qs-sheet-open {
    bottom: calc(70vh + 8px);
  }
  .qs-sheet-toggle.qs-sheet-open svg {
    transform: rotate(180deg);
  }
}

/* ── Override graphic workspace max-width for full-bleed canvas ── */
body.wn-graphic-workspace .tool-shell {
  max-width: 1400px;
}