/* ═══════════════════════════════════════════════════════════════
   SOVEL EditorXYZ — Main Stylesheet v2.0
   Cloud Web Builder & Publisher Studio
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Core palette */
  --bg-0: #09090b;
  --bg-1: #111114;
  --bg-2: #18181b;
  --bg-3: #212125;
  --bg-4: #2a2a2f;
  --border: #2e2e33;
  --border-hover: #3f3f46;
  --text-0: #fafafa;
  --text-1: #d4d4d8;
  --text-2: #a1a1aa;
  --text-3: #71717a;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-dim: rgba(99,102,241,0.15);
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
  /* Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  /* Transitions */
  --t-fast: 0.12s ease;
  --t-base: 0.2s ease;
  --t-slow: 0.35s ease;
  /* Sidebar */
  --sidebar-w: 260px;
  --panel-w: 320px;
  --topbar-h: 52px;
  --canvas-bg: #1a1a2e;
}

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

html, body, #app {
  height: 100%; width: 100%;
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--bg-0);
  color: var(--text-1);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ─── Scrollbars ─── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-4); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* ─── Login Screen ─── */
.login-screen {
  display: flex; align-items: center; justify-content: center;
  height: 100vh; width: 100vw;
  background: radial-gradient(ellipse at 30% 20%, rgba(99,102,241,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 80%, rgba(139,92,246,0.06) 0%, transparent 50%),
              var(--bg-0);
}
.login-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 48px 40px;
  width: 420px;
  max-width: 90vw;
}
.login-card .logo {
  font-size: 28px; font-weight: 700; color: var(--text-0);
  margin-bottom: 4px; letter-spacing: -0.5px;
}
.login-card .logo span { color: var(--accent); }
.login-card .subtitle {
  color: var(--text-3); font-size: 14px; margin-bottom: 32px;
}
.login-card label {
  display: block; font-size: 13px; font-weight: 500;
  color: var(--text-2); margin-bottom: 6px; margin-top: 16px;
}
.login-card input[type="text"],
.login-card input[type="password"] {
  width: 100%; padding: 10px 14px;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r-sm); color: var(--text-0);
  font-size: 14px; font-family: inherit;
  outline: none; transition: border var(--t-fast);
}
.login-card input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.login-card .error-msg {
  color: var(--danger); font-size: 13px; margin-top: 12px;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 18px; border-radius: var(--r-sm);
  font-size: 13px; font-weight: 500; font-family: inherit;
  border: 1px solid transparent; cursor: pointer;
  transition: all var(--t-fast); white-space: nowrap;
  text-decoration: none;
}
.btn-primary {
  background: var(--accent); color: #fff; border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary {
  background: var(--bg-3); color: var(--text-1); border-color: var(--border);
}
.btn-secondary:hover { background: var(--bg-4); border-color: var(--border-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }
.btn-ghost {
  background: transparent; color: var(--text-2); border: none;
}
.btn-ghost:hover { color: var(--text-0); background: var(--bg-3); }
.btn-full { width: 100%; justify-content: center; margin-top: 24px; padding: 12px; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-icon {
  padding: 6px; border-radius: var(--r-sm);
  background: transparent; border: none;
  color: var(--text-3); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--t-fast);
}
.btn-icon:hover { color: var(--text-0); background: var(--bg-3); }

/* ─── App Shell ─── */
.app-shell {
  display: flex; height: 100vh; width: 100vw;
}

/* ─── Left Sidebar ─── */
.sidebar {
  width: var(--sidebar-w); min-width: var(--sidebar-w);
  background: var(--bg-1); border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  transition: width var(--t-slow), min-width var(--t-slow);
  overflow: hidden; z-index: 20;
}
.sidebar.collapsed { width: 56px; min-width: 56px; }
.sidebar-header {
  height: var(--topbar-h); display: flex; align-items: center;
  padding: 0 16px; border-bottom: 1px solid var(--border);
  gap: 10px; flex-shrink: 0;
}
.sidebar-header .logo-text {
  font-size: 16px; font-weight: 700; color: var(--text-0);
  letter-spacing: -0.3px; white-space: nowrap;
}
.sidebar-header .logo-text span { color: var(--accent); }
.sidebar-nav {
  flex: 1; overflow-y: auto; padding: 8px;
}
.nav-section-title {
  font-size: 10px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 1px; color: var(--text-3);
  padding: 16px 10px 6px; white-space: nowrap;
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: var(--r-sm);
  font-size: 13px; color: var(--text-2); cursor: pointer;
  transition: all var(--t-fast); white-space: nowrap;
  border: none; background: none; width: 100%; text-align: left;
  font-family: inherit;
}
.nav-item:hover { color: var(--text-0); background: var(--bg-3); }
.nav-item.active { color: var(--accent); background: var(--accent-dim); }
.nav-item svg { flex-shrink: 0; width: 18px; height: 18px; }
.sidebar-footer {
  padding: 12px; border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* ─── Main Content Area ─── */
.main-area {
  flex: 1; display: flex; flex-direction: column;
  overflow: hidden; min-width: 0;
}

/* ─── Top Bar ─── */
.topbar {
  height: var(--topbar-h); display: flex; align-items: center;
  padding: 0 16px; background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  gap: 12px; flex-shrink: 0; z-index: 15;
}
.topbar-breadcrumb {
  display: flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--text-3);
}
.topbar-breadcrumb .sep { color: var(--text-3); opacity: 0.4; }
.topbar-breadcrumb .current { color: var(--text-0); font-weight: 500; }
.topbar-spacer { flex: 1; }
.topbar-actions { display: flex; align-items: center; gap: 8px; }

/* ─── Dashboard / Projects ─── */
.dashboard {
  flex: 1; overflow-y: auto; padding: 32px;
}
.dash-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 28px;
}
.dash-header h1 {
  font-size: 24px; font-weight: 700; color: var(--text-0);
  letter-spacing: -0.5px;
}
.project-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.project-card {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r-md); padding: 20px;
  cursor: pointer; transition: all var(--t-base);
  position: relative;
}
.project-card:hover {
  border-color: var(--accent); transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.project-card .pc-name {
  font-size: 16px; font-weight: 600; color: var(--text-0);
  margin-bottom: 4px;
}
.project-card .pc-desc {
  font-size: 13px; color: var(--text-3); margin-bottom: 12px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.project-card .pc-meta {
  display: flex; align-items: center; gap: 12px; font-size: 12px; color: var(--text-3);
}
.project-card .pc-status {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px; border-radius: 99px; font-size: 11px; font-weight: 500;
}
.pc-status.draft { background: var(--bg-4); color: var(--text-2); }
.pc-status.published { background: rgba(34,197,94,0.15); color: var(--success); }
.pc-status.deployed { background: rgba(99,102,241,0.15); color: var(--accent); }
.project-card .pc-actions {
  position: absolute; top: 12px; right: 12px;
  display: flex; gap: 4px; opacity: 0; transition: opacity var(--t-fast);
}
.project-card:hover .pc-actions { opacity: 1; }

.new-project-card {
  border: 2px dashed var(--border);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 10px; color: var(--text-3);
  min-height: 160px; background: transparent;
}
.new-project-card:hover {
  border-color: var(--accent); color: var(--accent);
  background: var(--accent-dim);
}

/* ─── Editor Layout ─── */
.editor-layout {
  flex: 1; display: flex; overflow: hidden;
}

/* Element Palette (left panel in editor) */
.element-palette {
  width: 240px; min-width: 240px;
  background: var(--bg-1); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden;
}
.palette-header {
  padding: 12px 14px; border-bottom: 1px solid var(--border);
  font-size: 12px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.5px; color: var(--text-3);
}
.palette-search {
  padding: 8px 12px;
}
.palette-search input {
  width: 100%; padding: 7px 10px;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r-sm); color: var(--text-1);
  font-size: 12px; outline: none; font-family: inherit;
}
.palette-search input:focus { border-color: var(--accent); }
.palette-body {
  flex: 1; overflow-y: auto; padding: 8px;
}
.palette-category {
  margin-bottom: 12px;
}
.palette-category-title {
  font-size: 11px; font-weight: 600; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.5px;
  padding: 4px 8px; margin-bottom: 4px;
}
.palette-item {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 8px; border-radius: var(--r-sm);
  font-size: 12px; color: var(--text-2);
  cursor: grab; transition: all var(--t-fast);
  border: none; background: none; width: 100%; text-align: left;
  font-family: inherit;
}
.palette-item:hover { background: var(--bg-3); color: var(--text-0); }
.palette-item.dragging { opacity: 0.5; }
.palette-item svg { width: 16px; height: 16px; flex-shrink: 0; color: var(--accent); }

/* ─── Canvas ─── */
.canvas-area {
  flex: 1; display: flex; flex-direction: column; overflow: hidden;
  background: var(--canvas-bg);
}
.canvas-toolbar {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 12px; background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.canvas-toolbar .device-btns {
  display: flex; gap: 2px; background: var(--bg-3);
  border-radius: var(--r-sm); padding: 2px;
}
.device-btns button {
  padding: 4px 10px; border-radius: 4px;
  border: none; background: transparent;
  color: var(--text-3); font-size: 12px;
  cursor: pointer; font-family: inherit;
  transition: all var(--t-fast);
}
.device-btns button.active { background: var(--accent); color: #fff; }
.device-btns button:hover:not(.active) { color: var(--text-0); }
.canvas-zoom {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--text-3);
}
.canvas-viewport {
  flex: 1; overflow: auto; display: flex;
  align-items: flex-start; justify-content: center;
  padding: 24px;
}
.canvas-frame {
  background: #fff; border-radius: var(--r-sm);
  box-shadow: 0 4px 32px rgba(0,0,0,0.4);
  transition: width var(--t-slow);
  min-height: 600px; position: relative;
  overflow: hidden;
}
.canvas-frame.desktop { width: 1200px; }
.canvas-frame.tablet { width: 768px; }
.canvas-frame.mobile { width: 375px; }

.canvas-frame iframe {
  width: 100%; height: 100%; border: none;
  min-height: 600px;
}

/* Drop zone indicators */
.drop-zone {
  min-height: 60px;
  border: 2px dashed var(--border);
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-3); font-size: 13px;
  transition: all var(--t-fast);
  margin: 8px;
}
.drop-zone.active {
  border-color: var(--accent); background: var(--accent-dim);
  color: var(--accent);
}

/* Selected element */
.canvas-element { position: relative; }
.canvas-element.selected {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.canvas-element .resize-handle {
  position: absolute; width: 8px; height: 8px;
  background: var(--accent); border: 1px solid #fff;
  border-radius: 2px; cursor: nwse-resize;
}

/* ─── Properties Panel (right) ─── */
.props-panel {
  width: var(--panel-w); min-width: var(--panel-w);
  background: var(--bg-1); border-left: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden;
}
.props-panel-header {
  padding: 12px 14px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.props-panel-header h3 {
  font-size: 13px; font-weight: 600; color: var(--text-0);
}
.props-tabs {
  display: flex; border-bottom: 1px solid var(--border);
}
.props-tab {
  flex: 1; padding: 8px; text-align: center;
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.5px; color: var(--text-3);
  cursor: pointer; border: none; background: none;
  border-bottom: 2px solid transparent;
  transition: all var(--t-fast); font-family: inherit;
}
.props-tab:hover { color: var(--text-1); }
.props-tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.props-body {
  flex: 1; overflow-y: auto; padding: 12px;
}
.prop-group {
  margin-bottom: 16px;
}
.prop-group-title {
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.5px; color: var(--text-3);
  margin-bottom: 8px; padding: 0 2px;
}
.prop-row {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 8px;
}
.prop-label {
  font-size: 12px; color: var(--text-2); width: 70px;
  flex-shrink: 0;
}
.prop-input {
  flex: 1; padding: 6px 8px;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r-sm); color: var(--text-0);
  font-size: 12px; font-family: inherit; outline: none;
}
.prop-input:focus { border-color: var(--accent); }
.prop-select {
  flex: 1; padding: 6px 8px;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r-sm); color: var(--text-0);
  font-size: 12px; font-family: inherit; outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 8px center;
  padding-right: 28px;
}
.prop-color {
  width: 32px; height: 28px; border: 1px solid var(--border);
  border-radius: var(--r-sm); cursor: pointer; padding: 2px;
  background: var(--bg-2);
}
.prop-input-sm { width: 60px; text-align: center; }

/* ─── Code Editor ─── */
.code-panel {
  background: var(--bg-0);
  font-family: 'JetBrains Mono', monospace;
}
.code-panel textarea {
  width: 100%; height: 100%;
  background: var(--bg-0); color: var(--text-1);
  border: none; padding: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px; line-height: 1.6;
  resize: none; outline: none;
  tab-size: 2;
}

/* ─── Modal / Dialog ─── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; backdrop-filter: blur(4px);
}
.modal {
  background: var(--bg-1); border: 1px solid var(--border);
  border-radius: var(--r-lg); width: 500px; max-width: 90vw;
  max-height: 85vh; overflow-y: auto;
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px 16px; border-bottom: 1px solid var(--border);
}
.modal-header h2 {
  font-size: 18px; font-weight: 600; color: var(--text-0);
}
.modal-body { padding: 20px 24px; }
.modal-footer {
  display: flex; justify-content: flex-end; gap: 8px;
  padding: 16px 24px; border-top: 1px solid var(--border);
}

/* ─── Layers / Page Tree ─── */
.layer-tree {
  font-size: 12px;
}
.layer-item {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 8px; border-radius: var(--r-sm);
  cursor: pointer; transition: background var(--t-fast);
  color: var(--text-2);
}
.layer-item:hover { background: var(--bg-3); }
.layer-item.selected { background: var(--accent-dim); color: var(--accent); }
.layer-indent { padding-left: 16px; }
.layer-item .layer-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--text-3);
}

/* ─── Page List ─── */
.page-list {
  padding: 8px;
}
.page-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: var(--r-sm);
  cursor: pointer; transition: all var(--t-fast);
  font-size: 13px; color: var(--text-2);
}
.page-item:hover { background: var(--bg-3); color: var(--text-0); }
.page-item.active { background: var(--accent-dim); color: var(--accent); }

/* ─── Toast / Notifications ─── */
.toast-container {
  position: fixed; top: 16px; right: 16px;
  display: flex; flex-direction: column; gap: 8px;
  z-index: 9999;
}
.toast {
  padding: 12px 18px; border-radius: var(--r-md);
  font-size: 13px; font-weight: 500;
  background: var(--bg-2); color: var(--text-0);
  border: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  animation: toast-in 0.3s ease;
  display: flex; align-items: center; gap: 10px;
  max-width: 400px;
}
.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.info { border-left: 3px solid var(--info); }
.toast.fade-out { animation: toast-out 0.3s ease forwards; }
@keyframes toast-in { from { opacity:0; transform:translateX(40px); } }
@keyframes toast-out { to { opacity:0; transform:translateX(40px); } }

/* ─── Domain Manager ─── */
.domain-table {
  width: 100%; border-collapse: collapse;
}
.domain-table th, .domain-table td {
  padding: 10px 14px; text-align: left; font-size: 13px;
  border-bottom: 1px solid var(--border);
}
.domain-table th {
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.5px; color: var(--text-3);
}

/* ─── Asset Library ─── */
.asset-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
}
.asset-item {
  aspect-ratio: 1; background: var(--bg-2);
  border: 1px solid var(--border); border-radius: var(--r-sm);
  overflow: hidden; cursor: pointer; position: relative;
  transition: border var(--t-fast);
}
.asset-item:hover { border-color: var(--accent); }
.asset-item img {
  width: 100%; height: 100%; object-fit: cover;
}
.asset-item .asset-name {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 4px 6px; font-size: 10px;
  background: rgba(0,0,0,0.7); color: var(--text-1);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ─── Server Console ─── */
.console-terminal {
  background: #000; color: #22c55e;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px; padding: 16px;
  height: 300px; overflow-y: auto;
  border-radius: var(--r-sm);
  white-space: pre-wrap; word-break: break-all;
}
.console-input-row {
  display: flex; gap: 8px; margin-top: 8px;
}
.console-input {
  flex: 1; padding: 8px 12px;
  background: #111; border: 1px solid #333;
  border-radius: var(--r-sm); color: #22c55e;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px; outline: none;
}

/* ─── Tabs ─── */
.tab-group {
  display: flex; gap: 0; border-bottom: 1px solid var(--border);
}
.tab-item {
  padding: 8px 16px; font-size: 13px; font-weight: 500;
  color: var(--text-3); cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--t-fast);
  border: none; background: none; font-family: inherit;
}
.tab-item:hover { color: var(--text-1); }
.tab-item.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ─── Deploy Panel ─── */
.deploy-steps {
  display: flex; flex-direction: column; gap: 8px;
}
.deploy-step {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; background: var(--bg-2);
  border: 1px solid var(--border); border-radius: var(--r-sm);
  font-size: 13px;
}
.deploy-step .step-icon {
  width: 24px; height: 24px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px;
}
.deploy-step .step-icon.pending { background: var(--bg-4); color: var(--text-3); }
.deploy-step .step-icon.running { background: var(--accent-dim); color: var(--accent); animation: pulse 1s infinite; }
.deploy-step .step-icon.done { background: rgba(34,197,94,0.15); color: var(--success); }
.deploy-step .step-icon.error { background: rgba(239,68,68,0.15); color: var(--danger); }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.5; } }

/* ─── Settings Panel ─── */
.settings-section {
  margin-bottom: 32px;
}
.settings-section h3 {
  font-size: 16px; font-weight: 600; color: var(--text-0);
  margin-bottom: 16px;
}
.settings-row {
  display: flex; align-items: flex-start; gap: 16px;
  margin-bottom: 16px;
}
.settings-row label {
  width: 140px; flex-shrink: 0;
  font-size: 13px; color: var(--text-2);
  padding-top: 8px;
}
.settings-row input, .settings-row textarea {
  flex: 1; padding: 8px 12px;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r-sm); color: var(--text-0);
  font-size: 13px; font-family: inherit; outline: none;
}
.settings-row textarea {
  min-height: 80px; resize: vertical;
  font-family: 'JetBrains Mono', monospace;
}
.settings-row input:focus, .settings-row textarea:focus {
  border-color: var(--accent);
}

/* ─── Responsive ─── */
@media (max-width: 1200px) {
  .sidebar { --sidebar-w: 200px; }
  .props-panel { --panel-w: 280px; }
}
@media (max-width: 900px) {
  .sidebar { position: fixed; left: -260px; z-index: 100; height: 100vh; }
  .sidebar.open { left: 0; box-shadow: 8px 0 24px rgba(0,0,0,0.3); }
  .element-palette { display: none; }
  .props-panel { position: fixed; right: -320px; z-index: 100; height: 100vh; }
  .props-panel.open { right: 0; box-shadow: -8px 0 24px rgba(0,0,0,0.3); }
}

/* ─── Utility Classes ─── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.text-sm { font-size: 13px; }
.text-xs { font-size: 11px; }
.text-muted { color: var(--text-3); }
.text-accent { color: var(--accent); }
.font-mono { font-family: 'JetBrains Mono', monospace; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hidden { display: none !important; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.p-4 { padding: 16px; }