.canvas-app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.canvas-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--glass-border);
  flex-shrink: 0;
}

.canvas-title {
  font-size: 1.1rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), #38bdf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.canvas-header-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.canvas-hbtn {
  padding: 0.4rem 0.8rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 0.5rem;
  color: var(--text-primary);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}

.canvas-hbtn:hover:not(:disabled) {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.canvas-hbtn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.canvas-hbtn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  border-color: transparent;
  color: #fff;
}

.canvas-hbtn.danger:hover {
  background: #ef4444;
  border-color: #ef4444;
}

.canvas-sep {
  width: 1px;
  height: 20px;
  background: var(--glass-border);
}

.canvas-workspace {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.canvas-editor-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  overflow: auto;
  background: var(--bg-primary);
  position: relative;
}

.canvas-canvas-container {
  position: relative;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  border-radius: 0.5rem;
  overflow: hidden;
}

.canvas-editor {
  display: block;
  background: #fff;
  max-width: none;
  max-height: none;
  border-radius: 0.5rem;
}

.canvas-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: var(--bg-secondary);
  border: 2px dashed var(--glass-border);
  border-radius: 0.5rem;
  color: var(--text-secondary);
  min-width: 380px;
  min-height: 260px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.canvas-placeholder:hover {
  border-color: var(--accent);
}

.canvas-placeholder.hidden {
  display: none;
}

.canvas-placeholder svg {
  opacity: 0.5;
}

.canvas-placeholder small {
  font-size: 0.75rem;
  opacity: 0.6;
}

.canvas-zoom-bar {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 2rem;
  padding: 0.3rem 0.6rem;
  backdrop-filter: blur(12px);
}

.canvas-zbtn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 50%;
  color: var(--text-primary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.2s;
}

.canvas-zbtn:hover {
  background: var(--accent);
  color: #fff;
}

#zoom-label {
  font-size: 0.8rem;
  min-width: 42px;
  text-align: center;
}

.canvas-sidebar {
  width: 300px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

.canvas-tabs {
  display: flex;
  border-bottom: 1px solid var(--glass-border);
}

.canvas-tab {
  flex: 1;
  padding: 0.7rem 0.3rem;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}

.canvas-tab:hover {
  color: var(--text-primary);
}

.canvas-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.canvas-panel {
  display: none;
  padding: 1rem;
  overflow-y: auto;
  flex: 1;
}

.canvas-panel.active {
  display: block;
}

.canvas-filter-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.canvas-filter-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.2s;
}

.canvas-filter-btn:hover {
  border-color: var(--accent);
}

.canvas-filter-btn.active {
  border-color: var(--accent);
  background: rgba(14,165,233,0.1);
}

.canvas-fp {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 0.35rem;
}

.fp-gray { filter: grayscale(100%); }
.fp-sepia { filter: sepia(100%); }
.fp-vintage { filter: sepia(50%) contrast(90%) brightness(90%); }
.fp-dramatic { filter: contrast(150%) brightness(110%) saturate(120%); }
.fp-pixel { image-rendering: pixelated; background-size: 8px 8px; background-image: linear-gradient(45deg, #667eea 25%, #764ba2 25%, #764ba2 50%, #667eea 50%, #667eea 75%, #764ba2 75%); }
.fp-blur { filter: blur(2px); }
.fp-sharp { filter: contrast(1.3); }
.fp-invert { filter: invert(1); }
.fp-emboss { filter: contrast(1.5); }
.fp-edge { filter: contrast(2) grayscale(1); }
.fp-warm { filter: sepia(0.3) saturate(1.2); }
.fp-cool { filter: saturate(1.3) hue-rotate(180deg); }
.fp-vignette { filter: brightness(0.85); }

.canvas-filter-btn span {
  font-size: 0.7rem;
  color: var(--text-secondary);
}

.canvas-param {
  margin-bottom: 1rem;
}

.canvas-param label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.canvas-param input[type="range"] {
  width: 100%;
  cursor: pointer;
  accent-color: var(--accent);
}

.canvas-param select,
.canvas-param input[type="number"] {
  width: 100%;
  padding: 0.4rem 0.6rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: 0.4rem;
  color: var(--text-primary);
  font-size: 0.85rem;
}

.canvas-param > span {
  font-size: 0.75rem;
  color: var(--accent);
  float: right;
  margin-top: -1.5rem;
}

.canvas-btn-row {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
}

.canvas-tbtn {
  flex: 1;
  padding: 0.4rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 0.4rem;
  color: var(--text-primary);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.canvas-tbtn:hover {
  border-color: var(--accent);
}

.canvas-tbtn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  border-color: transparent;
  color: #fff;
  margin-top: 0.5rem;
  flex: none;
  width: 100%;
}

.canvas-dims {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.canvas-dims input {
  flex: 1;
}

.canvas-check {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  margin: 0.4rem 0;
  cursor: pointer;
}

.canvas-params .canvas-param {
  display: none;
}

.canvas-params .canvas-param.visible {
  display: block;
}

.canvas-info-panel,
.canvas-info-block {
  padding: 0.75rem;
  background: var(--glass-bg);
  border-top: 1px solid var(--glass-border);
  font-size: 0.8rem;
}

.canvas-info-panel h4,
.canvas-info-block h4 {
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.canvas-info-panel div,
.canvas-info-block div {
  display: flex;
  justify-content: space-between;
  padding: 0.2rem 0;
}

.canvas-info-panel span,
.canvas-info-block span {
  color: var(--text-secondary);
}

.canvas-file-input {
  display: none;
}

@media (max-width: 900px) {
  .canvas-workspace { flex-direction: column; }
  .canvas-sidebar { width: 100%; border-left: none; border-top: 1px solid var(--glass-border); max-height: 280px; }
  .canvas-header-bar { flex-direction: column; gap: 0.5rem; align-items: stretch; }
  .canvas-header-actions { justify-content: center; }
  .canvas-placeholder { min-width: 280px; min-height: 180px; }
}