/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, textarea { font: inherit; }
[contenteditable]:focus { outline: none; }

/* ===== DESIGN TOKENS ===== */
:root {
  /* Colors */
  --bg: #040714;
  --surface: rgba(255,255,255,0.03);
  --surface-hover: rgba(255,255,255,0.06);
  --surface-2: rgba(255,255,255,0.07);
  --border-subtle: rgba(255,255,255,0.07);
  --border: rgba(255,255,255,0.1);
  --border-strong: rgba(255,255,255,0.22);
  --border-active: rgba(255,255,255,0.25);
  --text-primary: #f9f9f9;
  --text-secondary: #cacaca;
  --text-muted: rgba(255,255,255,0.45);
  --accent: #0063e5;
  --accent-bright: #0080ff;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;

  /* Typography Scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --font: 'Avenir Next', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing Scale (4px grid) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;

  /* Radii */
  --radius-sm: 6px;
  --radius-input: 8px;
  --radius-card: 15px;
  --radius-xl: 20px;

  /* Easing & Duration */
  --ease-snap: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 120ms;
  --dur: 200ms;
  --dur-slow: 350ms;

  /* App dimensions */
  --sidebar-width: 240px;
  --header-height: 68px;
  --col-min-width: 300px;
  --node-base-height: 84px;
  --node-row-span: 94px;
  --node-gap: 16px;
  --col-padding: 12px;
}

/* ===== BASE ===== */
html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.4;
}

/* ===== APP SHELL ===== */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* ===== HEADER ===== */
#header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
  height: var(--header-height);
  background: linear-gradient(135deg, #B015B0 0%, #3D0080 45%, #080010 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(12px);
  flex-shrink: 0;
  z-index: 100;
}

#header-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-right: 8px;
}

.header-logo-img {
  height: 36px;
  width: auto;
  flex-shrink: 0;
  filter: brightness(0) invert(1);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  display: block;
}
.header-logo-img:hover { transform: scale(1.14) rotate(-9deg); }

#app-brand {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  font-size: 1.2em;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

/* Diagram title lives in the sidebar now */
#sidebar-title-zone {
  padding: 10px 12px 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}
#diagram-title {
  width: 100%;
  box-sizing: border-box;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-input);
  padding: 5px 8px;
  transition: border-color 0.15s ease, background 0.15s ease;
}
#diagram-title:hover {
  border-color: var(--border);
  background: var(--surface-hover);
}
#diagram-title:focus {
  border-color: var(--accent);
  background: var(--surface-hover);
  outline: none;
}

.header-sep {
  width: 1px;
  height: 20px;
  background: var(--border);
  flex-shrink: 0;
}

.header-spacer { flex: 1; }

/* Header buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-input);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s ease;
  white-space: nowrap;
  flex-shrink: 0;
}
.btn-ghost {
  color: var(--text-secondary);
  border: 1px solid var(--border);
  background: transparent;
}
.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border-active);
  background: var(--surface-hover);
}
.btn-primary {
  color: #fff;
  background: var(--accent);
  border: 1px solid transparent;
}
.btn-primary:hover {
  background: var(--accent-bright);
  box-shadow: 0 4px 16px rgba(0,99,229,0.4);
}
.btn-danger-ghost {
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.3);
}
.btn-danger-ghost:hover {
  background: rgba(239,68,68,0.1);
  border-color: var(--danger);
}
.btn svg { width: 14px; height: 14px; flex-shrink: 0; }
.btn i { font-size: 13px; flex-shrink: 0; line-height: 1; }
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Hidden file input */
#load-json-input { display: none; }

/* ===== BODY LAYOUT ===== */
#body {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* ===== SIDEBAR ===== */
#sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: rgba(4,7,20,0.8);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width 0.2s ease;
}
#sidebar.collapsed { width: 0; overflow: hidden; }

#sidebar-inner {
  width: var(--sidebar-width);
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 0 20px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}
#sidebar-inner::-webkit-scrollbar { width: 4px; }
#sidebar-inner::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

/* Sidebar section */
.sidebar-section {
  margin-bottom: 4px;
}

.sidebar-section-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  cursor: pointer;
  user-select: none;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.15s ease;
}
.sidebar-section-header:hover { color: var(--text-primary); }
.sidebar-section-header svg {
  width: 12px; height: 12px;
  margin-left: auto;
  transition: transform 0.2s ease;
}
.sidebar-section.collapsed .sidebar-section-header svg { transform: rotate(-90deg); }
.sidebar-section-body { padding: 4px 12px 8px; }
.sidebar-section.collapsed .sidebar-section-body { display: none; }

/* Legend rows */
.legend-row {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 4px 2px;
  border-radius: 6px;
  transition: background 0.12s ease;
}
.legend-row:hover { background: var(--surface-hover); }

.color-swatch {
  width: 16px; height: 16px;
  border-radius: 4px;
  flex-shrink: 0;
  cursor: pointer;
  border: 1.5px solid rgba(255,255,255,0.15);
}
.color-swatch-input {
  width: 16px; height: 16px;
  border-radius: 4px;
  padding: 0;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
  opacity: 0;
  position: absolute;
}
.color-swatch-wrapper {
  position: relative;
  width: 16px; height: 16px;
  flex-shrink: 0;
}

.legend-label {
  flex: 1;
  font-size: 12px;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  padding: 2px 4px;
  min-width: 0;
  transition: all 0.12s ease;
}
.legend-label:hover { border-color: var(--border); }
.legend-label:focus { border-color: var(--accent); color: var(--text-primary); outline: none; }

.legend-delete {
  width: 20px; height: 20px;
  border-radius: 4px;
  color: var(--text-secondary);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  line-height: 1;
  opacity: 0;
  transition: all 0.12s ease;
  flex-shrink: 0;
}
.legend-row:hover .legend-delete { opacity: 1; }
.legend-delete:hover { background: rgba(239,68,68,0.15); color: var(--danger); }

.marker-icon { display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; flex-shrink: 0; }
.marker-icon i { font-size: 12px; }
.node-markers span { display: inline-flex; align-items: center; }
.node-markers span i { font-size: 12px; }

.btn-add-legend {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 2px;
  margin-top: 4px;
  color: var(--accent-bright);
  font-size: 12px;
  font-weight: 500;
  border-radius: 4px;
  transition: all 0.12s ease;
  width: 100%;
}
.btn-add-legend:hover { background: rgba(0,128,255,0.08); }
.btn-add-legend svg { width: 12px; height: 12px; }

/* Sidebar toggle button */
#sidebar-toggle {
  position: absolute;
  left: var(--sidebar-width);
  top: calc(var(--header-height) + 10px);
  z-index: 200;
  width: 18px;
  height: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: none;
  border-radius: 0 6px 6px 0;
  color: var(--text-secondary);
  display: flex; align-items: center; justify-content: center;
  transition: left 0.2s ease, color 0.15s ease, background 0.15s ease;
  cursor: pointer;
}
#sidebar-toggle:hover { color: var(--text-primary); background: var(--surface-hover); }
#sidebar.collapsed ~ #sidebar-toggle,
#sidebar-toggle.collapsed { left: 0; }

/* ===== CANVAS WRAPPER ===== */
#canvas-wrapper {
  flex: 1;
  overflow: auto;
  position: relative;
  background: var(--bg);
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}
#canvas-wrapper::-webkit-scrollbar { width: 8px; height: 8px; }
#canvas-wrapper::-webkit-scrollbar-track { background: transparent; }
#canvas-wrapper::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
#canvas-wrapper::-webkit-scrollbar-corner { background: transparent; }

/* ===== CANVAS ===== */
#canvas {
  display: flex;
  flex-direction: column;
  min-width: max-content;
  min-height: 100%;
  padding: 20px 20px 40px;
  position: relative;
}

/* Column header row */
#column-header-row {
  display: flex;
  gap: 28px;
  margin-bottom: 10px;
  align-items: stretch;
}

/* Column grid area */
#column-area {
  display: flex;
  gap: 28px;
  flex: 1;
  align-items: flex-start;
  position: relative;
}

/* Individual column */
.column {
  min-width: var(--col-min-width);
  width: var(--col-min-width);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.column-header {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card) var(--radius-card) 0 0;
  padding: 8px 10px;
  min-height: 40px;
  position: relative;
}

.column-title {
  flex: 1;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  text-transform: uppercase;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  padding: 2px 4px;
  cursor: text;
  transition: all 0.12s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}
.column-title:hover { border-color: var(--border); color: var(--text-primary); }
.column-title:focus { border-color: var(--accent); color: var(--text-primary); outline: none; }

.column-delete-btn {
  width: 20px; height: 20px;
  border-radius: 4px;
  color: var(--text-secondary);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  opacity: 0;
  transition: all 0.12s ease;
  flex-shrink: 0;
}
.column-header:hover .column-delete-btn { opacity: 1; }
.column-delete-btn:hover { background: rgba(239,68,68,0.15); color: var(--danger); }

/* Column body (nodes list) */
.column-body {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius-card) var(--radius-card);
  padding: var(--col-padding);
  display: flex;
  flex-direction: column;
  gap: var(--node-gap);
  flex: 1;
  min-height: 120px;
}

/* Add node button in column */
.btn-add-node {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px;
  border-radius: var(--radius-input);
  border: 1.5px dashed rgba(255,255,255,0.12);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  transition: all 0.15s ease;
  margin-top: 4px;
}
.btn-add-node:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
  background: rgba(0,99,229,0.06);
}
.btn-add-node svg { width: 12px; height: 12px; }

/* Add column button */
#add-column-btn {
  min-width: 48px;
  width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 1.5px dashed rgba(255,255,255,0.1);
  border-radius: var(--radius-card);
  color: var(--text-secondary);
  font-size: 20px;
  transition: all 0.15s ease;
  flex-shrink: 0;
  cursor: pointer;
  min-height: 80px;
}
#add-column-btn:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
  background: rgba(0,99,229,0.06);
}

/* ===== NODES ===== */
.node {
  position: relative;
  border-radius: 12px;
  border: 2px solid;
  padding: 14px 14px 12px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
  user-select: none;
  min-height: var(--node-base-height);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.node:hover {
  transform: translateY(-2px);
}
.node.selected {
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
}
.node.drag-over {
  outline: 2px dashed var(--accent-bright);
  outline-offset: 2px;
}
.node.effectively-locked {
  opacity: 0.45;
  filter: grayscale(20%);
}
.node.drag-source { opacity: 0.2 !important; pointer-events: none; }

/* ── GAME CARD LAYOUT ────────────────────────────────── */
.node.node-has-icon {
  padding: 0;
  flex-direction: row;
  align-items: stretch;
  overflow: hidden;
  min-height: 64px;
}
.node-icon-box {
  width: 64px;
  min-width: 64px;
  flex-shrink: 0;
  overflow: hidden;
  position: relative;
}
.node-icon-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.node-vbar {
  width: 3px;
  flex-shrink: 0;
  align-self: stretch;
  opacity: 0.55;
}
.node-body-content {
  flex: 1;
  padding: 10px 32px 10px 12px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}
/* In game card, no top margin needed on text — no inline handle above */
.node.node-has-icon .node-text {
  margin-top: 0 !important;
}
/* Push drag handle dots to only span the body content area (after icon+vbar = 67px) */
.node.node-has-icon .node-drag-handle {
  left: 67px;
}

/* ===== POINTER DRAG ===== */
.drop-indicator {
  height: 3px;
  background: var(--accent-bright);
  border-radius: 2px;
  margin: 2px 0;
  box-shadow: 0 0 10px rgba(0,128,255,0.8), 0 0 0 1px rgba(0,128,255,0.3);
  pointer-events: none;
  flex-shrink: 0;
  animation: drop-indicator-in 0.1s ease forwards;
}
@keyframes drop-indicator-in {
  from { opacity: 0; transform: scaleX(0.8); }
  to   { opacity: 1; transform: scaleX(1); }
}
.column-body.drag-target, .lane.drag-target {
  background: rgba(0,99,229,0.08) !important;
  border-color: rgba(0,99,229,0.4) !important;
  box-shadow: inset 0 0 24px rgba(0,99,229,0.06);
}

/* Node text */
.node-text {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-primary);
  word-break: break-word;
  flex: 1;
  line-height: 1.45;
  min-height: 20px;
}
.node-text[contenteditable="true"] {
  cursor: text;
  border-radius: 3px;
  padding: 1px 3px;
  margin: -1px -3px;
  background: rgba(255,255,255,0.06);
  outline: 1px solid var(--accent);
}

/* Node markers */
.node-markers {
  position: absolute;
  top: 7px;
  right: 9px;
  display: flex;
  gap: 3px;
  font-size: 13px;
  line-height: 1;
}
.node-markers span {
  display: inline-block;
  animation: marker-pop 0.2s cubic-bezier(0.34,1.56,0.64,1) both;
}
@keyframes marker-pop {
  from { opacity: 0; transform: scale(0.4) rotate(-15deg); }
  to   { opacity: 1; transform: scale(1) rotate(0deg); }
}

/* Lock overlay — rendered as a clickable button */
.node-lock {
  position: absolute;
  top: 6px;
  left: 7px;
  font-size: 11px;
  opacity: 0.6;
  background: none;
  border: none;
  cursor: pointer;
  padding: 3px;
  border-radius: 4px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  color: var(--text-secondary);
  transition: opacity 0.12s ease, background 0.12s ease;
}
.node-lock:hover {
  opacity: 1;
  background: rgba(255,255,255,0.12);
}

/* Connection ports */
.port {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 2.5px solid var(--border-active);
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  transition: opacity 0.15s ease, transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
  z-index: 20;
  cursor: crosshair;
}
.port-left  { left:  -7px; }
.port-right { right: -7px; }
.port-top    { top: -7px;  bottom: auto; left: 50%; transform: translateX(-50%); }
.port-bottom { bottom: -7px; top: auto; left: 50%; transform: translateX(-50%); }
/* Show ports on node hover */
.node:hover .port { opacity: 1; }
/* Bigger + colored on port hover */
.port:hover {
  transform: translateY(-50%) scale(1.5);
  border-color: var(--accent-bright);
  background: var(--accent-bright);
  box-shadow: 0 0 0 4px rgba(0,128,255,0.25);
}
.port-top:hover    { transform: translateX(-50%) scale(1.5); border-color: var(--accent-bright); background: var(--accent-bright); box-shadow: 0 0 0 4px rgba(0,128,255,0.25); }
.port-bottom:hover { transform: translateX(-50%) scale(1.5); border-color: var(--accent-bright); background: var(--accent-bright); box-shadow: 0 0 0 4px rgba(0,128,255,0.25); }
/* In connection mode: keep all ports visible */
.connection-mode .port { opacity: 0.9; animation: port-pulse 1.2s ease infinite; }
.connection-mode .port-source-active {
  background: var(--accent-bright);
  border-color: var(--accent-bright);
  opacity: 1;
  animation: none;
  box-shadow: 0 0 0 5px rgba(0,128,255,0.3);
}
/* While dragging to connect — show ports on ALL nodes */
.drag-connecting .port { opacity: 0.8; }
.drag-connecting .node:hover .port {
  opacity: 1;
  transform: translateY(-50%) scale(1.4);
  border-color: var(--accent-bright);
  background: rgba(0,128,255,0.3);
}

@keyframes port-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0,128,255,0.5); }
  50% { box-shadow: 0 0 0 4px rgba(0,128,255,0); }
}

/* ===== SVG OVERLAY ===== */
#svg-overlay {
  position: absolute;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 10;
  overflow: visible;
}
#svg-overlay path, #svg-overlay line {
  pointer-events: none;
}
#svg-overlay path.selected-edge {
  stroke-width: 4 !important;
  filter: drop-shadow(0 0 4px currentColor);
}

/* ===== CONTEXT MENU ===== */
#context-menu {
  position: fixed;
  z-index: 1000;
  background: rgba(10,15,35,0.97);
  border: 1px solid var(--border-active);
  border-radius: 10px;
  padding: 4px;
  min-width: 180px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.04);
  backdrop-filter: blur(20px);
  display: none;
}
#context-menu.visible { display: block; }

.ctx-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.1s ease;
  white-space: nowrap;
}
.ctx-item:hover { background: var(--surface-hover); color: var(--text-primary); }
.ctx-item.danger:hover { background: rgba(239,68,68,0.1); color: var(--danger); }
.ctx-item svg { width: 14px; height: 14px; flex-shrink: 0; }

.ctx-separator {
  height: 1px;
  background: var(--border);
  margin: 3px 6px;
}

.ctx-submenu-header {
  padding: 4px 10px 2px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
}

.ctx-color-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  padding: 4px 10px 6px;
}
.ctx-color-btn {
  width: 22px; height: 22px;
  border-radius: 5px;
  border: 2px solid rgba(255,255,255,0.15);
  cursor: pointer;
  transition: transform 0.1s ease, border-color 0.1s ease;
  flex-shrink: 0;
}
.ctx-color-btn:hover { transform: scale(1.2); border-color: rgba(255,255,255,0.5); }
.ctx-color-btn.active { border-color: white; box-shadow: 0 0 0 2px rgba(255,255,255,0.3); }

.ctx-marker-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 4px 10px 6px;
}
.ctx-marker-btn {
  width: 28px; height: 28px;
  border-radius: 6px;
  border: 1.5px solid var(--border);
  cursor: pointer;
  font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.1s ease;
  flex-shrink: 0;
}
.ctx-marker-btn:hover { background: var(--surface-hover); border-color: var(--border-active); }
.ctx-marker-btn.active { border-color: var(--accent-bright); background: rgba(0,128,255,0.15); }

.ctx-rowspan-row {
  display: flex;
  gap: 4px;
  padding: 4px 10px 6px;
}
.ctx-span-btn {
  flex: 1;
  padding: 4px;
  border-radius: 5px;
  border: 1.5px solid var(--border);
  color: var(--text-secondary);
  font-size: 12px;
  text-align: center;
  cursor: pointer;
  transition: all 0.1s ease;
}
.ctx-span-btn:hover { border-color: var(--border-active); color: var(--text-primary); background: var(--surface-hover); }
.ctx-span-btn.active { border-color: var(--accent-bright); color: var(--accent-bright); background: rgba(0,128,255,0.12); }

/* Edge type selector */
.ctx-edge-type-row {
  display: flex;
  gap: 5px;
  padding: 4px 10px 6px;
}
.ctx-edge-type-btn {
  flex: 1;
  padding: 5px;
  border-radius: 6px;
  border: 1.5px solid var(--border);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: all 0.12s ease;
}
.ctx-edge-type-btn.blocks { color: var(--danger); }
.ctx-edge-type-btn.informs { color: var(--accent-bright); }
.ctx-edge-type-btn:hover { border-color: currentColor; background: rgba(255,255,255,0.04); }

/* ===== EDGE TYPE MENU ===== */
#edge-type-menu {
  position: fixed;
  z-index: 1000;
  background: rgba(10,15,35,0.97);
  border: 1px solid var(--border-active);
  border-radius: 10px;
  padding: 6px;
  display: none;
  flex-direction: column;
  gap: 2px;
  min-width: 170px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.04);
  backdrop-filter: blur(20px);
}
#edge-type-menu.visible { display: flex; }
.etm-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  padding: 3px 8px 5px;
}
.etm-btn {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.1s ease;
  background: none;
  border: none;
  text-align: left;
  width: 100%;
}
.etm-btn:hover { background: var(--surface-hover); color: var(--text-primary); }
.etm-btn.active { background: rgba(255,255,255,0.07); color: var(--text-primary); }
.etm-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.etm-btn i { font-size: 12px; width: 14px; text-align: center; flex-shrink: 0; }
.etm-sep { height: 1px; background: var(--border); margin: 3px 6px; }

/* ===== TOASTS ===== */
#toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: rgba(20,28,58,0.97);
  border: 1px solid var(--border-active);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  backdrop-filter: blur(16px);
  animation: toast-in 0.25s ease forwards;
  max-width: 320px;
}
.toast.out { animation: toast-out 0.25s ease forwards; }
.toast-icon { font-size: 16px; flex-shrink: 0; }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes toast-out {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(6px); }
}

/* ===== MODALS ===== */
#modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(6px);
  z-index: 500;
  display: none;
  align-items: center;
  justify-content: center;
}
#modal-overlay.visible { display: flex; }

.modal {
  background: rgba(10,15,35,0.98);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-card);
  padding: 24px;
  min-width: 320px;
  max-width: 480px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.8);
}
.modal-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.modal-body { margin-bottom: 20px; }
.modal-body p { color: var(--text-secondary); font-size: 13px; line-height: 1.5; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* Form inputs inside modals */
.form-group { margin-bottom: 14px; }
.form-label { display: block; font-size: 12px; color: var(--text-secondary); margin-bottom: 5px; font-weight: 500; }
.form-input {
  width: 100%;
  padding: 8px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-input);
  color: var(--text-primary);
  font-size: 13px;
  transition: border-color 0.12s ease;
}
.form-input:focus { border-color: var(--accent); outline: none; }

/* Add color form */
.add-color-preview {
  width: 100%;
  height: 40px;
  border-radius: var(--radius-input);
  border: 1px solid var(--border);
  margin-top: 8px;
}

/* ===== CONNECTION TEMP LINE ===== */
#temp-connection-line {
  pointer-events: none;
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  z-index: 50;
  overflow: visible;
}

/* ===== DRAG INDICATOR ===== */
.node-drag-handle {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 20px;
  cursor: grab;
  border-radius: 8px 8px 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.node-drag-handle:active { cursor: grabbing; }
.node-drag-handle-dots {
  display: flex;
  gap: 3px;
  opacity: 0;
  transition: opacity 0.12s ease;
}
.node:hover .node-drag-handle-dots { opacity: 0.4; }
.node-drag-handle-dots span {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--text-secondary);
  display: block;
}

/* ===== CANVAS EMPTY STATE ===== */
.canvas-hint {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  pointer-events: none;
  text-align: center;
}
.canvas-hint-icon { opacity: 0.18; }
.canvas-hint-text {
  font-size: 13px;
  color: var(--text-secondary);
  opacity: 0.45;
  line-height: 1.6;
}
#canvas:has(.column) .canvas-hint { display: none; }

/* ── Edge type legend ── */
.etl-row { display: flex; align-items: center; gap: 7px; padding: 2px 0; }
.etl-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.etl-name { font-size: 11.5px; color: var(--text-secondary); }

/* ===== LANES ===== */
.lanes-wrapper {
  display: flex;
  flex-direction: row;
  gap: 16px;
  padding: var(--col-padding);
  flex: 1;
  min-height: 120px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius-card) var(--radius-card);
}
.lane {
  flex: 1;
  min-width: 210px;
  display: flex;
  flex-direction: column;
  gap: var(--node-gap);
  position: relative;
  border-radius: 8px;
  padding: 4px;
  transition: background 0.12s ease;
}
.lane + .lane {
  border-left: 1px dashed rgba(255,255,255,0.08);
  padding-left: 20px;
}

/* Extra gap around nodes that have a same-lane vertical connection */
.node.vert-conn-below { margin-bottom: 48px; }
.node.vert-conn-above { margin-top: 48px; }
.lane-head-row {
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 18px;
}
.lane-header {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 2px 4px 4px;
  border-radius: 4px;
  outline: none;
  cursor: text;
  min-height: 14px;
  flex: 1;
}
.btn-del-lane {
  margin-left: auto;
  flex-shrink: 0;
  font-size: 14px;
  line-height: 1;
  color: var(--text-secondary);
  padding: 0 3px;
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.15s ease, color 0.15s ease;
}
.lane-head-row:hover .btn-del-lane { opacity: 1; }
.btn-del-lane:hover { color: var(--danger); }
.lane-header:empty::before {
  content: attr(data-placeholder);
  opacity: 0.25;
  pointer-events: none;
}
.lane-header:focus { background: rgba(255,255,255,0.04); }
.btn-add-lane {
  min-width: 22px;
  align-self: stretch;
  border-radius: 6px;
  border: 1px dashed var(--border);
  color: var(--text-secondary);
  font-size: 18px;
  line-height: 1;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
  flex-shrink: 0;
  padding: 0 4px;
}
.btn-add-lane:hover { border-color: var(--accent); color: var(--accent-bright); background: rgba(0,99,229,0.05); }

/* ===== RESPONSIVE ===== */
@media (max-width: 700px) {
  #sidebar { width: 0; }
  #sidebar.mobile-open { width: var(--sidebar-width); }
  #sidebar-toggle { display: flex; }
}

/* ===== UTILITY ===== */
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .header-logo-img { transition: none; }
  #sidebar { transition: none; }
}