/* Design Tokens */
:root {
  --bg: #0a0e1a;
  --bg2: #111827;
  --bg3: #1a2234;
  --border: #1e2d45;
  --border-hi: #2d4a6e;
  --ink: #e2e8f0;
  --ink-m: #94a3b8;
  --ink-lt: #4b6280;
  --cyan: #22d3ee;
  --green: #22c55e;
  --amber: #f59e0b;
  --red: #ef4444;
  --blue: #3b82f6;
  --purple: #8b5cf6;
  --orange: #f97316;
  --r: 8px;
  --font: 'Space Grotesk', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'Consolas', 'Courier New', monospace;
  --sidebar-w: 280px;
  --right-w: 300px;
  --topbar-h: 48px;
  --gcode-h: 180px;
  --trans: .15s cubic-bezier(.4,0,.2,1);
}
:root[data-theme="light"] {
  --bg: #f0f4f8;
  --bg2: #ffffff;
  --bg3: #e8edf5;
  --border: #cbd5e1;
  --border-hi: #94a3b8;
  --ink: #0f172a;
  --ink-m: #334155;
  --ink-lt: #64748b;
}

/* Reset & Base */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  height: 100%; overflow: hidden;
  background: var(--bg); color: var(--ink);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}
button { cursor: pointer; font-family: var(--font); }
input, select { font-family: var(--font); }
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hi); border-radius: 2px; }

/* Layout Shell */
#app {
  display: grid;
  grid-template-rows: var(--topbar-h) 1fr var(--gcode-h);
  grid-template-columns: var(--sidebar-w) 1fr var(--right-w);
  height: 100vh;
  transition: grid-template-columns var(--trans);
}
#app.sidebar-collapsed { --sidebar-w: 56px; }
#app.gcode-collapsed { grid-template-rows: var(--topbar-h) 1fr 36px; }

/* Topbar */
#topbar {
  grid-column: 1 / -1;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; padding: 0 16px; gap: 12px; z-index: 50;
}
#logo {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 13px; font-weight: 700;
  color: var(--ink); white-space: nowrap; text-decoration: none; flex-shrink: 0;
}
#logo em { color: var(--cyan); font-style: normal; }
#logo .ver-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green); flex-shrink: 0; box-shadow: 0 0 6px var(--green);
}
.tb-divider { width: 1px; height: 24px; background: var(--border); flex-shrink: 0; }
.tb-nav-link {
  font-family: var(--mono); font-size: 11px; color: var(--ink-lt);
  text-decoration: none; padding: 4px 8px; border: 1px solid var(--border);
  border-radius: 6px; transition: all var(--trans); white-space: nowrap; flex-shrink: 0;
}
.tb-nav-link:hover { color: var(--ink-m); border-color: var(--border-hi); }
.tb-nav-link.active { color: var(--cyan); border-color: rgba(34,211,238,.4); background: rgba(34,211,238,.06); }
#machine-select-wrap { display: flex; align-items: center; gap: 8px; flex: 1; max-width: 340px; }
.tb-lbl { font-size: 11px; color: var(--ink-lt); white-space: nowrap; }
#machine-select {
  flex: 1; background: var(--bg3); border: 1px solid var(--border);
  color: var(--ink); border-radius: 6px; padding: 5px 10px;
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  cursor: pointer; transition: border-color var(--trans);
}
#machine-select:focus { outline: none; border-color: var(--border-hi); }
.tb-spacer { flex: 1; }
#conn-status {
  display: flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 11px; color: var(--ink-lt);
  padding: 4px 10px; border: 1px solid var(--border); border-radius: 6px; flex-shrink: 0;
}
#conn-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ink-lt); transition: background var(--trans); }
#conn-dot.connected { background: var(--green); box-shadow: 0 0 6px var(--green); animation: pulse-dot 2s ease infinite; }
#conn-dot.connecting { background: var(--amber); animation: pulse-dot 1s ease infinite; }
#conn-dot.error { background: var(--red); }
@keyframes pulse-dot { 0%,100% { opacity: 1; } 50% { opacity: .55; } }
.lang-sw {
  display: flex; background: var(--bg3); border: 1px solid var(--border);
  border-radius: 6px; overflow: hidden;
}
.lang-sw button {
  padding: 3px 9px; border: none; background: transparent;
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  letter-spacing: .3px; color: var(--ink-lt); transition: all var(--trans);
}
.lang-sw button.active { background: rgba(34,211,238,.15); color: var(--cyan); }
.lang-sw button:hover:not(.active) { color: var(--ink-m); }
.theme-btn {
  background: none; border: 1px solid var(--border); border-radius: 6px;
  padding: 4px 7px; font-size: 14px; color: var(--ink-lt);
  transition: all var(--trans); line-height: 1; flex-shrink: 0;
}
.theme-btn:hover { color: var(--ink); border-color: var(--border-hi); }

/* Left Sidebar */
#sidebar {
  grid-row: 2 / 3; grid-column: 1 / 2;
  background: var(--bg2); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden; position: relative;
}
#sb-toggle {
  position: absolute; top: 8px; right: -13px; z-index: 10;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--bg2); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 10px; color: var(--ink-lt); transition: all var(--trans);
}
#sb-toggle:hover { color: var(--ink); border-color: var(--border-hi); }
.sb-scroll { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 12px; }
.sb-section { display: flex; flex-direction: column; gap: 6px; }
.sb-section-title {
  font-size: 9px; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; color: var(--ink-lt);
  padding: 0 2px; display: flex; align-items: center; justify-content: space-between;
}
.sb-section-title .badge {
  font-size: 9px; background: var(--bg3); border: 1px solid var(--border);
  border-radius: 4px; padding: 1px 5px; color: var(--ink-lt);
}

/* Drop zone */
#drop-zone {
  border: 1.5px dashed var(--border-hi); border-radius: var(--r);
  padding: 18px 12px; text-align: center; cursor: pointer;
  transition: all var(--trans); background: var(--bg3);
}
#drop-zone:hover, #drop-zone.over { border-color: var(--cyan); background: rgba(34,211,238,.04); }
#drop-zone.over { border-style: solid; }
.dz-icon { font-size: 20px; margin-bottom: 5px; color: var(--ink-lt); }
.dz-h1 { font-size: 11px; font-weight: 600; color: var(--ink); margin-bottom: 2px; }
.dz-h2 { font-size: 10px; color: var(--ink-m); }
.dz-h2 b { color: var(--cyan); }
#file-input { display: none; }

/* Job list */
#job-list { display: flex; flex-direction: column; gap: 4px; }
.job-item {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 6px; padding: 8px 10px; cursor: pointer;
  transition: border-color var(--trans); display: flex; align-items: center; gap: 8px;
}
.job-item:hover { border-color: var(--border-hi); }
.job-item.active { border-color: var(--cyan); background: rgba(34,211,238,.04); }
.job-item.running { border-color: var(--green); }
.job-item.error { border-color: var(--red); }
.job-status-icon { font-size: 12px; flex-shrink: 0; width: 16px; text-align: center; }
.job-status-icon.spin { animation: spin .7s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
.job-info { flex: 1; min-width: 0; }
.job-name {
  font-size: 11px; font-weight: 600; color: var(--ink);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.job-meta { font-family: var(--mono); font-size: 9px; color: var(--ink-lt); margin-top: 1px; }
.job-badge {
  font-family: var(--mono); font-size: 8px; font-weight: 700;
  padding: 1px 5px; border-radius: 3px; white-space: nowrap;
  letter-spacing: .3px; flex-shrink: 0;
}
.badge-pending { background: rgba(75,98,128,.2); color: var(--ink-lt); border: 1px solid var(--border); }
.badge-generating { background: rgba(34,211,238,.1); color: var(--cyan); border: 1px solid rgba(34,211,238,.3); }
.badge-ready { background: rgba(59,130,246,.1); color: var(--blue); border: 1px solid rgba(59,130,246,.3); }
.badge-running { background: rgba(34,197,94,.1); color: var(--green); border: 1px solid rgba(34,197,94,.3); }
.badge-paused { background: rgba(245,158,11,.1); color: var(--amber); border: 1px solid rgba(245,158,11,.3); }
.badge-done { background: rgba(34,197,94,.08); color: var(--green); border: 1px solid rgba(34,197,94,.2); }
.badge-error { background: rgba(239,68,68,.1); color: var(--red); border: 1px solid rgba(239,68,68,.3); }
.job-empty { font-size: 11px; color: var(--ink-lt); text-align: center; padding: 16px 8px; font-style: italic; }

/* Machine settings */
.sb-settings { display: flex; flex-direction: column; gap: 6px; }
.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.setting-lbl { font-size: 10px; color: var(--ink-m); flex-shrink: 0; }
.setting-val {
  flex: 1; background: var(--bg3); border: 1px solid var(--border);
  color: var(--ink); border-radius: 5px; padding: 4px 7px;
  font-family: var(--mono); font-size: 10px; transition: border-color var(--trans);
}
.setting-val:focus { outline: none; border-color: var(--border-hi); }
.setting-val-select {
  flex: 1; background: var(--bg3); border: 1px solid var(--border);
  color: var(--ink); border-radius: 5px; padding: 4px 7px;
  font-family: var(--mono); font-size: 10px; cursor: pointer;
}

/* Sidebar import / action buttons */
.sb-import-btn {
  width: 100%; padding: 7px 10px; border-radius: var(--r);
  background: rgba(139,92,246,.1); border: 1px solid rgba(139,92,246,.3);
  color: var(--purple, #8b5cf6); font-family: var(--mono); font-size: 11px; font-weight: 600;
  letter-spacing: .2px; cursor: pointer; transition: all var(--trans);
  display: flex; align-items: center; justify-content: center;
}
.sb-import-btn:hover { background: rgba(139,92,246,.18); border-color: var(--purple, #8b5cf6); }

/* Generate button */
#btn-generate {
  width: 100%; padding: 10px; border-radius: var(--r);
  background: rgba(34,211,238,.1); border: 1px solid rgba(34,211,238,.3);
  color: var(--cyan); font-family: var(--mono); font-size: 12px; font-weight: 700;
  letter-spacing: .3px; transition: all var(--trans);
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
#btn-generate:hover:not(:disabled) { background: rgba(34,211,238,.18); border-color: var(--cyan); }
#btn-generate:disabled { opacity: .4; cursor: not-allowed; }
#btn-generate .btn-spinner {
  width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid rgba(34,211,238,.3); border-top-color: var(--cyan);
  animation: spin .7s linear infinite; display: none;
}
#est-time { font-family: var(--mono); font-size: 10px; color: var(--ink-lt); text-align: center; min-height: 14px; }

/* Collapsed sidebar */
#app.sidebar-collapsed #sidebar .sb-scroll { overflow: hidden; }
#app.sidebar-collapsed .sb-section-title span:first-child,
#app.sidebar-collapsed .dz-h1, #app.sidebar-collapsed .dz-h2,
#app.sidebar-collapsed .job-info, #app.sidebar-collapsed .job-badge,
#app.sidebar-collapsed .setting-row, #app.sidebar-collapsed #btn-generate,
#app.sidebar-collapsed #est-time, #app.sidebar-collapsed .sb-section-title .badge { display: none; }

/* Center — Viewport + Operation Tree Tabs */
#center { grid-row: 2 / 3; grid-column: 2 / 3; display: flex; flex-direction: column; overflow: hidden; position: relative; }
#center-tabs {
  display: flex; align-items: center; background: var(--bg2);
  border-bottom: 1px solid var(--border); padding: 0 12px; height: 36px; gap: 2px; flex-shrink: 0;
}
.c-tab {
  background: none; border: none; border-bottom: 2px solid transparent;
  color: var(--ink-lt); font-family: var(--mono); font-size: 11px; font-weight: 600;
  padding: 8px 12px; cursor: pointer; transition: all var(--trans); margin-bottom: -1px;
}
.c-tab:hover { color: var(--ink-m); }
.c-tab.active { color: var(--cyan); border-bottom-color: var(--cyan); }
.c-tab-spacer { flex: 1; }
.hud-btn-sm {
  background: var(--bg3); border: 1px solid var(--border); border-radius: 5px;
  color: var(--ink-lt); font-family: var(--mono); font-size: 10px; padding: 4px 8px;
  cursor: pointer; transition: all var(--trans); white-space: nowrap;
}
.hud-btn-sm:hover { color: var(--ink); border-color: var(--border-hi); }
.hud-btn-sm.active { color: var(--cyan); border-color: rgba(34,211,238,.4); background: rgba(34,211,238,.06); }

/* Viewport */
#viewport { flex: 1; position: relative; overflow: hidden; }
#cnc-canvas { display: block; width: 100%; height: 100%; }
#empty-state {
  position: absolute; inset: 0; display: flex;
  align-items: center; justify-content: center; flex-direction: column; gap: 12px; pointer-events: none;
}
.es-icon { font-size: 48px; opacity: .1; }
.es-text { font-size: 13px; color: var(--ink-lt); }
.es-sub { font-size: 11px; color: var(--ink-lt); opacity: .7; }
#hud-overlay { position: absolute; top: 10px; right: 10px; display: flex; flex-direction: column; gap: 6px; z-index: 10; }
#hud-info {
  position: absolute; bottom: 10px; left: 10px; z-index: 10;
  background: rgba(10,14,26,.85); backdrop-filter: blur(8px);
  border: 1px solid var(--border); border-radius: 6px;
  font-family: var(--mono); font-size: 9px; color: var(--ink-lt); padding: 6px 10px; line-height: 1.7;
}
[data-theme="light"] #hud-info { background: rgba(240,244,248,.9); }
[data-theme="light"] .hud-btn-sm { background: rgba(240,244,248,.92); }
#color-legend {
  position: absolute; bottom: 10px; right: 10px; z-index: 10;
  background: rgba(10,14,26,.85); backdrop-filter: blur(8px);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 7px 10px; display: flex; flex-direction: column; gap: 4px;
}
[data-theme="light"] #color-legend { background: rgba(240,244,248,.9); }
.leg-row { display: flex; align-items: center; gap: 6px; }
.leg-line { width: 18px; height: 2px; border-radius: 1px; }
.leg-lbl { font-family: var(--mono); font-size: 9px; color: var(--ink-lt); }

/* Operation tree */
#ops-panel { display: none; flex: 1; overflow-y: auto; padding: 10px 12px; background: var(--bg); }
#ops-panel.active { display: block; }
.ops-empty { font-size: 12px; color: var(--ink-lt); text-align: center; padding: 30px; font-style: italic; }
.ops-part { margin-bottom: 10px; border: 1px solid var(--border); border-radius: 7px; overflow: hidden; }
.ops-part-header {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg2); padding: 7px 10px; cursor: pointer; user-select: none;
  font-size: 12px; font-weight: 600; color: var(--ink);
}
.ops-part-header:hover { background: var(--bg3); }
.ops-part-arrow { font-size: 10px; color: var(--ink-lt); transition: transform var(--trans); }
.ops-part.collapsed .ops-part-arrow { transform: rotate(-90deg); }
.ops-part-dims { font-family: var(--mono); font-size: 9px; color: var(--ink-lt); margin-left: auto; }
.ops-children { padding: 4px 0; display: flex; flex-direction: column; gap: 1px; }
.ops-part.collapsed .ops-children { display: none; }
.ops-op {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 10px 5px 24px; cursor: pointer;
  transition: background var(--trans); border-radius: 4px;
}
.ops-op:hover { background: var(--bg3); }
.ops-op.active { background: rgba(34,211,238,.06); }
.ops-op-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.ops-op-name { font-size: 11px; color: var(--ink); }
.ops-op-params { font-family: var(--mono); font-size: 9px; color: var(--ink-lt); margin-left: auto; }

/* Right — DRO Panel */
#right-panel {
  grid-row: 2 / 3; grid-column: 3 / 4;
  background: var(--bg2); border-left: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden;
}
.rp-section { border-bottom: 1px solid var(--border); padding: 12px 14px; }
.rp-section:last-child { border-bottom: none; flex: 1; }
.rp-title { font-size: 9px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; color: var(--ink-lt); margin-bottom: 10px; }

/* DRO axes */
#dro-axes { display: flex; flex-direction: column; gap: 5px; }
.dro-row { display: flex; align-items: center; gap: 8px; }
.dro-lbl { font-family: var(--mono); font-size: 11px; font-weight: 700; color: var(--ink-lt); width: 14px; flex-shrink: 0; }
.dro-bar-wrap { flex: 1; height: 3px; background: var(--border); border-radius: 2px; overflow: hidden; }
.dro-bar { height: 100%; background: var(--cyan); border-radius: 2px; transition: width .1s; }
.dro-val {
  font-family: var(--mono); font-size: 16px; font-weight: 700;
  color: var(--cyan); min-width: 90px; text-align: right; letter-spacing: -.5px; transition: color .1s;
}
.dro-unit { font-family: var(--mono); font-size: 9px; color: var(--ink-lt); width: 22px; flex-shrink: 0; }
.dro-row.dro-angle .dro-val { color: var(--purple); }
.dro-row.dro-angle .dro-bar { background: var(--purple); }
#dro-axes.error .dro-val { color: var(--red) !important; animation: dro-flash .4s ease infinite; }
@keyframes dro-flash { 0%,100%{opacity:1}50%{opacity:.3} }

/* Tool info */
#tool-info { display: flex; flex-direction: column; gap: 6px; }
.ti-row { display: flex; align-items: center; justify-content: space-between; }
.ti-lbl { font-size: 10px; color: var(--ink-lt); }
.ti-val { font-family: var(--mono); font-size: 12px; font-weight: 700; color: var(--ink); }
.ti-val.tool-purple { color: var(--purple); }
.ti-val.feed-cyan { color: var(--cyan); }

/* Override slider */
#override-wrap { display: flex; flex-direction: column; gap: 6px; }
.override-row { display: flex; align-items: center; justify-content: space-between; }
.override-lbl { font-size: 10px; color: var(--ink-lt); }
#override-val { font-family: var(--mono); font-size: 13px; font-weight: 700; color: var(--amber); }
#override-slider {
  width: 100%; height: 4px; -webkit-appearance: none; appearance: none;
  background: var(--border); border-radius: 2px; cursor: pointer; outline: none;
}
#override-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 14px; height: 14px; border-radius: 50%;
  background: var(--amber); border: 2px solid var(--bg2); cursor: pointer;
  box-shadow: 0 0 6px rgba(245,158,11,.5);
}

/* Program controls */
#prog-controls { display: flex; flex-direction: column; gap: 8px; }
.ctrl-row { display: flex; gap: 6px; }
.ctrl-btn {
  flex: 1; padding: 9px 6px; border-radius: 7px; border: 1px solid var(--border);
  background: var(--bg3); color: var(--ink-m); font-family: var(--mono);
  font-size: 11px; font-weight: 700; transition: all var(--trans);
  display: flex; align-items: center; justify-content: center; gap: 5px;
}
.ctrl-btn:hover:not(:disabled) { color: var(--ink); border-color: var(--border-hi); }
.ctrl-btn:disabled { opacity: .35; cursor: not-allowed; }
.ctrl-btn.run { background: rgba(34,197,94,.1); color: var(--green); border-color: rgba(34,197,94,.3); }
.ctrl-btn.run:hover:not(:disabled) { background: rgba(34,197,94,.2); border-color: var(--green); }
.ctrl-btn.pause { background: rgba(245,158,11,.1); color: var(--amber); border-color: rgba(245,158,11,.3); }
.ctrl-btn.pause:hover:not(:disabled) { background: rgba(245,158,11,.18); }
.ctrl-btn.resume { background: rgba(59,130,246,.1); color: var(--blue); border-color: rgba(59,130,246,.3); }
.ctrl-btn.resume:hover:not(:disabled) { background: rgba(59,130,246,.18); }
.ctrl-btn.stop { background: rgba(75,98,128,.1); color: var(--ink-lt); border-color: var(--border); }
.ctrl-btn.stop:hover:not(:disabled) { color: var(--ink); }

/* E-Stop */
#estop-btn {
  width: 100%; height: 60px; border-radius: 10px;
  background: var(--red); border: 3px solid #dc2626;
  color: #fff; font-family: var(--mono); font-size: 14px; font-weight: 900;
  letter-spacing: 1px; text-transform: uppercase;
  transition: all var(--trans); display: flex; align-items: center; justify-content: center; gap: 8px;
  box-shadow: 0 0 20px rgba(239,68,68,.3), inset 0 1px 0 rgba(255,255,255,.1);
}
#estop-btn:hover { background: #dc2626; box-shadow: 0 0 30px rgba(239,68,68,.5); transform: scale(1.01); }
#estop-btn:active { transform: scale(.98); }

/* Progress */
#progress-wrap { display: flex; flex-direction: column; gap: 7px; }
#progress-bar-track { height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; }
#progress-bar-fill { height: 100%; background: linear-gradient(90deg, var(--blue), var(--cyan)); border-radius: 3px; width: 0%; transition: width .2s; }
.prog-meta { display: flex; justify-content: space-between; }
.prog-pct { font-family: var(--mono); font-size: 13px; font-weight: 700; color: var(--blue); }
.prog-time { font-family: var(--mono); font-size: 10px; color: var(--ink-lt); }
.prog-name { font-family: var(--mono); font-size: 9px; color: var(--ink-lt); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Machine status badge */
#machine-status-badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  padding: 3px 9px; border-radius: 4px; letter-spacing: .3px;
}
.ms-stopped { background: rgba(75,98,128,.15); color: var(--ink-lt); border: 1px solid var(--border); }
.ms-running { background: rgba(34,197,94,.1); color: var(--green); border: 1px solid rgba(34,197,94,.3); animation: blink-badge 1.5s ease infinite; }
.ms-paused { background: rgba(245,158,11,.1); color: var(--amber); border: 1px solid rgba(245,158,11,.3); }
.ms-error { background: rgba(239,68,68,.1); color: var(--red); border: 1px solid rgba(239,68,68,.3); }
@keyframes blink-badge { 0%,100%{opacity:1}50%{opacity:.6} }

/* Bottom — G-CODE Panel */
#gcode-panel {
  grid-row: 3 / 4; grid-column: 1 / -1;
  background: var(--bg2); border-top: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden;
}
#gcode-header {
  display: flex; align-items: center; gap: 10px;
  padding: 0 14px; height: 35px; flex-shrink: 0;
  border-bottom: 1px solid var(--border); background: var(--bg3);
}
.gc-header-title { font-family: var(--mono); font-size: 11px; font-weight: 700; color: var(--ink-m); display: flex; align-items: center; gap: 6px; }
.gc-chip { font-size: 9px; padding: 1px 6px; border-radius: 3px; background: rgba(34,211,238,.1); color: var(--cyan); border: 1px solid rgba(34,211,238,.2); }
.gc-spacer { flex: 1; }
.gc-action-btn {
  background: none; border: 1px solid var(--border); border-radius: 5px;
  color: var(--ink-lt); font-family: var(--mono); font-size: 10px;
  padding: 3px 8px; cursor: pointer; transition: all var(--trans);
}
.gc-action-btn:hover { color: var(--ink); border-color: var(--border-hi); }
.gc-toggle-btn {
  background: none; border: none; color: var(--ink-lt); font-size: 13px;
  padding: 4px 6px; cursor: pointer; transition: color var(--trans);
}
.gc-toggle-btn:hover { color: var(--ink); }
#gcode-body { flex: 1; overflow-y: auto; padding: 4px 0; }
.gc-line {
  display: flex; align-items: baseline; padding: 1px 14px;
  border-radius: 2px; transition: background .07s; cursor: default;
}
.gc-line:hover { background: rgba(51,65,85,.25); }
.gc-line.current { background: rgba(34,211,238,.1); border-left: 2px solid var(--cyan); }
.gc-ln { width: 42px; flex-shrink: 0; text-align: right; color: var(--ink-lt); font-family: var(--mono); font-size: 9px; padding-right: 14px; user-select: none; line-height: 1.8; }
.gc-src { flex: 1; font-family: var(--mono); font-size: 10.5px; line-height: 1.8; white-space: pre; }
.gc-cmt { color: #4b6280; font-style: italic; }
.gc-g { color: #f59e0b; font-weight: 700; }
.gc-m { color: #fb923c; font-weight: 700; }
.gc-axis { color: #94a3b8; }
.gc-num { color: var(--cyan); }
.gc-f { color: var(--purple); }
.gc-empty { font-family: var(--mono); font-size: 11px; color: var(--ink-lt); text-align: center; padding: 30px; font-style: italic; }
#app.gcode-collapsed #gcode-body { display: none; }

/* Toast Notifications */
#toast-container {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  z-index: 9999; display: flex; flex-direction: column; gap: 8px;
  pointer-events: none; align-items: center;
}
.toast {
  padding: 9px 16px; border-radius: 8px;
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  backdrop-filter: blur(8px); border: 1px solid;
  pointer-events: auto; white-space: nowrap;
  animation: toast-in .2s ease forwards;
  max-width: 400px; overflow: hidden; text-overflow: ellipsis;
}
@keyframes toast-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.toast-success { background: rgba(34,197,94,.15); color: var(--green); border-color: rgba(34,197,94,.3); }
.toast-error { background: rgba(239,68,68,.15); color: var(--red); border-color: rgba(239,68,68,.3); }
.toast-warning { background: rgba(245,158,11,.12); color: var(--amber); border-color: rgba(245,158,11,.3); }
.toast-info { background: rgba(34,211,238,.12); color: var(--cyan); border-color: rgba(34,211,238,.25); }

/* Loading Overlay */
#loading-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(10,14,26,.75); backdrop-filter: blur(4px);
  display: none; align-items: center; justify-content: center; flex-direction: column; gap: 14px;
}
#loading-overlay.active { display: flex; }
.lo-spinner { width: 40px; height: 40px; border-radius: 50%; border: 3px solid var(--border); border-top-color: var(--cyan); animation: spin .7s linear infinite; }
.lo-text { font-family: var(--mono); font-size: 12px; color: var(--ink-m); }
.lo-sub { font-family: var(--mono); font-size: 10px; color: var(--ink-lt); }

/* Responsive */
@media (max-width: 1024px) {
  :root { --sidebar-w: 56px; }
  #app { grid-template-columns: var(--sidebar-w) 1fr var(--right-w); }
  .sb-section-title span:first-child, .dz-h1, .dz-h2,
  .job-info, .job-badge, .setting-row, #btn-generate,
  #est-time, .sb-section-title .badge { display: none; }
  #drop-zone { padding: 10px 4px; }
  .dz-icon { font-size: 16px; margin: 0; }
}
@media (max-width: 600px) {
  :root { --sidebar-w: 0px; --right-w: 100%; }
  #app { grid-template-columns: 0 1fr var(--right-w); }
  #sidebar { display: none; }
  #center { display: none; }
  #center.mobile-active { display: flex; }
}