/* Lumen Design System */

:root {
  --bg-app: #f7f7f5;
  --bg-canvas: #ffffff;
  --bg-elevated: #ffffff;
  --bg-hover: rgba(0, 0, 0, 0.04);
  --bg-active: rgba(0, 0, 0, 0.07);
  --bg-overlay: rgba(0, 0, 0, 0.25);
  --border-subtle: rgba(0, 0, 0, 0.06);
  --border-default: rgba(0, 0, 0, 0.1);
  --border-strong: rgba(0, 0, 0, 0.16);
  --text-primary: #1a1a1a;
  --text-secondary: #6b6b6b;
  --text-tertiary: #9a9a9a;
  --text-inverse: #ffffff;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-muted: rgba(99, 102, 241, 0.12);
  --accent-text: #4f46e5;
  --selection: #6366f1;
  --selection-bg: rgba(99, 102, 241, 0.08);
  --handle: #ffffff;
  --handle-border: #6366f1;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12), 0 4px 8px rgba(0, 0, 0, 0.04);
  --shadow-float: 0 8px 30px rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(0, 0, 0, 0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --topbar-h: 52px;
  --statusbar-h: 28px;
  --transition: 140ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

[data-theme="dark"] {
  --bg-app: #111113;
  --bg-canvas: #18181b;
  --bg-elevated: #1f1f23;
  --bg-hover: rgba(255, 255, 255, 0.05);
  --bg-active: rgba(255, 255, 255, 0.09);
  --bg-overlay: rgba(0, 0, 0, 0.55);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-tertiary: #71717a;
  --text-inverse: #111113;
  --accent: #818cf8;
  --accent-hover: #a5b4fc;
  --accent-muted: rgba(129, 140, 248, 0.15);
  --accent-text: #a5b4fc;
  --selection: #818cf8;
  --selection-bg: rgba(129, 140, 248, 0.12);
  --handle: #1f1f23;
  --handle-border: #818cf8;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5), 0 4px 8px rgba(0, 0, 0, 0.25);
  --shadow-float: 0 8px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.06);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  overflow: hidden;
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.45;
  color: var(--text-primary);
  background: var(--bg-app);
  -webkit-font-smoothing: antialiased;
}

#app { display: flex; flex-direction: column; height: 100%; position: relative; }

.topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  user-select: none;
  flex-shrink: 0;
}

.topbar-left, .topbar-right, .topbar-center { display: flex; align-items: center; gap: 4px; }

.logo { display: flex; align-items: center; gap: 8px; color: var(--accent); padding: 4px 6px; border-radius: var(--radius-sm); }
.logo-text { font-weight: 600; font-size: 14px; letter-spacing: -0.02em; color: var(--text-primary); }

.divider { width: 1px; height: 18px; background: var(--border-default); margin: 0 6px; }

.icon-btn {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border: none; background: transparent; color: var(--text-secondary);
  border-radius: var(--radius-sm); cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.icon-btn:active { background: var(--bg-active); }

.tool-group {
  display: flex; align-items: center; gap: 2px;
  background: var(--bg-hover); padding: 3px; border-radius: var(--radius-md);
}

.tool-btn {
  width: 36px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border: none; background: transparent; color: var(--text-secondary);
  border-radius: var(--radius-sm); cursor: pointer;
  transition: all var(--transition);
}
.tool-btn:hover { color: var(--text-primary); background: var(--bg-active); }
.tool-btn.active { background: var(--bg-elevated); color: var(--accent); box-shadow: var(--shadow-sm); }

#workspace {
  flex: 1; position: relative; overflow: hidden;
  background: var(--bg-canvas); cursor: default;
}

#main-canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  display: block; touch-action: none;
}

.overlay { position: absolute; inset: 0; pointer-events: none; z-index: 10; }

.empty-state {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  pointer-events: none; color: var(--text-tertiary); z-index: 5;
  transition: opacity 0.3s ease;
}
.empty-state.hidden { opacity: 0; visibility: hidden; }
.empty-illustration { margin-bottom: 20px; color: var(--text-tertiary); }
.empty-state h2 { font-size: 18px; font-weight: 600; color: var(--text-secondary); margin-bottom: 8px; letter-spacing: -0.02em; }
.empty-state p { font-size: 13px; margin-bottom: 20px; }
.empty-hints { display: flex; gap: 16px; font-size: 12px; }
.empty-hints span { display: flex; align-items: center; gap: 6px; }

kbd {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 20px; height: 20px; padding: 0 5px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  background: var(--bg-hover); border: 1px solid var(--border-default);
  border-radius: 4px; color: var(--text-secondary); box-shadow: 0 1px 0 var(--border-subtle);
}

.selection-toolbar {
  position: absolute; display: flex; align-items: center; gap: 2px;
  padding: 4px; background: var(--bg-elevated);
  border: 1px solid var(--border-subtle); border-radius: var(--radius-md);
  box-shadow: var(--shadow-float); z-index: 50;
  transform: translateX(-50%);
  transition: opacity 0.12s ease, transform 0.12s ease;
}
.selection-toolbar.hidden { opacity: 0; pointer-events: none; transform: translateX(-50%) translateY(4px); }

.st-btn {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  border: none; background: transparent; color: var(--text-secondary);
  border-radius: var(--radius-sm); cursor: pointer;
  transition: all var(--transition);
}
.st-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.st-divider { width: 1px; height: 16px; background: var(--border-default); margin: 0 3px; }

.style-panel {
  position: absolute; width: 220px; padding: 12px;
  background: var(--bg-elevated); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-float);
  z-index: 50; display: flex; flex-direction: column; gap: 10px;
}
.style-panel.hidden { display: none; }

.style-row { display: flex; align-items: center; gap: 8px; }
.style-row label {
  width: 48px; font-size: 11px; font-weight: 500; color: var(--text-tertiary);
  text-transform: uppercase; letter-spacing: 0.04em;
}
.color-swatches { display: flex; gap: 4px; flex: 1; }
.swatch {
  width: 18px; height: 18px; border-radius: 50%;
  border: 1.5px solid transparent; cursor: pointer; transition: transform 0.1s ease;
}
.swatch:hover { transform: scale(1.15); }
.swatch.active { border-color: var(--accent); box-shadow: 0 0 0 1.5px var(--bg-elevated); }

input[type="color"] { width: 22px; height: 22px; border: none; border-radius: 4px; cursor: pointer; background: transparent; padding: 0; }
input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch { border: 1px solid var(--border-default); border-radius: 4px; }

input[type="range"] {
  flex: 1; height: 4px; -webkit-appearance: none;
  background: var(--border-default); border-radius: 2px; outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); cursor: pointer; border: 2px solid var(--bg-elevated);
  box-shadow: 0 0 0 1px var(--border-default);
}
#stroke-width-val, #opacity-val {
  width: 32px; font-size: 11px; font-family: var(--font-mono);
  color: var(--text-secondary); text-align: right;
}

.command-bar {
  position: absolute; bottom: calc(var(--statusbar-h) + 24px); left: 50%;
  transform: translateX(-50%); width: min(480px, calc(100% - 32px));
  background: var(--bg-elevated); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-lg);
  z-index: 200; overflow: hidden;
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.command-bar.hidden { opacity: 0; pointer-events: none; transform: translateX(-50%) translateY(8px); }

.command-input-wrap {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px; border-bottom: 1px solid var(--border-subtle);
}
.cmd-icon { color: var(--text-tertiary); flex-shrink: 0; }
#command-input {
  flex: 1; border: none; background: transparent;
  font-family: var(--font-sans); font-size: 14px; color: var(--text-primary); outline: none;
}
#command-input::placeholder { color: var(--text-tertiary); }
.cmd-esc { font-size: 10px; opacity: 0.7; }

.command-list { list-style: none; max-height: 280px; overflow-y: auto; padding: 6px; }
.command-list li {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: var(--radius-sm); cursor: pointer;
  color: var(--text-primary); font-size: 13px; transition: background var(--transition);
}
.command-list li:hover, .command-list li.active { background: var(--accent-muted); color: var(--accent-text); }
.command-list li .cmd-shortcut { margin-left: auto; font-size: 11px; font-family: var(--font-mono); color: var(--text-tertiary); }
.command-list .cmd-section {
  padding: 8px 10px 4px; font-size: 10px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-tertiary); pointer-events: none;
}

.statusbar {
  height: var(--statusbar-h); display: flex; align-items: center; justify-content: space-between;
  padding: 0 14px; background: var(--bg-elevated); border-top: 1px solid var(--border-subtle);
  font-size: 11px; color: var(--text-tertiary); font-family: var(--font-mono);
  user-select: none; flex-shrink: 0; z-index: 100;
}
.status-left, .status-center, .status-right { display: flex; align-items: center; gap: 6px; }
.status-sep { opacity: 0.4; }
.statusbar kbd { height: 16px; min-width: 16px; font-size: 10px; padding: 0 4px; }

.context-menu {
  position: absolute; min-width: 180px; background: var(--bg-elevated);
  border: 1px solid var(--border-subtle); border-radius: var(--radius-md);
  box-shadow: var(--shadow-float); padding: 4px; z-index: 300; user-select: none;
}
.context-menu.hidden { display: none; }
.cm-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 7px 10px; border-radius: var(--radius-sm); font-size: 12.5px;
  color: var(--text-primary); cursor: pointer; transition: background var(--transition);
}
.cm-item:hover { background: var(--accent-muted); color: var(--accent-text); }
.cm-shortcut { font-size: 11px; font-family: var(--font-mono); color: var(--text-tertiary); }
.cm-divider { height: 1px; background: var(--border-subtle); margin: 4px 6px; }

.modal {
  position: absolute; inset: 0; z-index: 400;
  display: flex; align-items: center; justify-content: center;
}
.modal.hidden { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: var(--bg-overlay); backdrop-filter: blur(4px); }
.modal-content {
  position: relative; width: min(360px, calc(100% - 32px));
  background: var(--bg-elevated); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); padding: 24px;
}
.modal-content h3 { font-size: 16px; font-weight: 600; margin-bottom: 16px; letter-spacing: -0.02em; }
.export-options { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.export-btn {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px;
  border: 1px solid var(--border-default); background: transparent; border-radius: var(--radius-md);
  font-family: var(--font-sans); font-size: 13px; font-weight: 500; color: var(--text-primary);
  cursor: pointer; transition: all var(--transition);
}
.export-btn:hover { background: var(--accent-muted); border-color: var(--accent); color: var(--accent-text); }
.modal-close {
  width: 100%; padding: 8px; border: none; background: var(--bg-hover); border-radius: var(--radius-sm);
  font-family: var(--font-sans); font-size: 13px; color: var(--text-secondary); cursor: pointer;
  transition: background var(--transition);
}
.modal-close:hover { background: var(--bg-active); }

[data-theme="dark"] .icon-sun { display: none !important; }
[data-theme="dark"] .icon-moon { display: block !important; }
[data-theme="light"] .icon-moon { display: none !important; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-default); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-strong); }

@media (max-width: 720px) {
  .logo-text { display: none; }
  .tool-btn { width: 32px; height: 30px; }
  .topbar { padding: 0 8px; }
  .empty-hints { flex-direction: column; gap: 8px; }
}