:root {
  --bg: #0f0f1a;
  --surface: #1a1a2e;
  --surface2: #242442;
  --surface3: #2d2d50;
  --primary: #6c63ff;
  --primary-light: #8b83ff;
  --secondary: #ff6584;
  --accent: #00d4aa;
  --accent2: #ffc857;
  --accent3: #ff9a3c;
  --text: #e8e8f0;
  --text2: #a0a0b8;
  --text3: #6a6a8a;
  --danger: #ff4757;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --glow: 0 0 20px rgba(108,99,255,0.15);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 40px;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 20px 20px;
  position: relative;
  flex-wrap: wrap;
  gap: 12px;
}
.header-left { text-align: left }
.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.project-select {
  padding: 7px 12px;
  background: var(--surface2);
  border: 1px solid var(--surface3);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.82rem;
  font-family: inherit;
  cursor: pointer;
  min-width: 200px;
  outline: none;
  transition: border-color 0.25s;
}
.project-select:focus { border-color: var(--primary) }
.project-select option { background: var(--surface); color: var(--text) }
.btn-sm { padding: 6px 12px; font-size: 0.78rem }
.save-status {
  font-size: 0.72rem;
  color: var(--text3);
  white-space: nowrap;
  transition: color 0.3s;
}
.save-status.saved { color: var(--accent) }
.save-status.saving { color: var(--accent2) }
.project-info {
  font-size: 0.68rem;
  color: var(--text3);
  white-space: nowrap;
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: default;
}
.project-info:hover { color: var(--text2) }
.btn-sm.danger { color: var(--danger, #e74c3c) }
.btn-sm.danger:hover { background: rgba(231,76,60,0.15) }
.modal-sm { max-width: 400px }
#deleteDialog .modal-box p strong { color: var(--text) }
/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.15s ease;
}
@keyframes fadeIn { from { opacity: 0 } to { opacity: 1 } }
.modal-box {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 32px;
  width: 420px;
  max-width: 90vw;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.modal-box h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 20px }
.modal-box label {
  display: flex;
  flex-direction: column;
  font-size: 0.78rem;
  color: var(--text2);
  margin-bottom: 16px;
  gap: 6px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.modal-input {
  padding: 9px 12px;
  background: var(--surface2);
  border: 1px solid var(--surface3);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text);
  font-family: inherit;
  outline: none;
  transition: border-color 0.25s;
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
  resize: vertical;
}
.modal-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(108,99,255,0.15) }
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
}

.app-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  border-radius: 2px;
}

.header-logo-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
}
.header-logo {
  width: 56px; height: 56px;
  object-fit: contain;
  flex-shrink: 0;
}
.app-header h1 {
  font-size: 2.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
  margin-bottom: 4px;
}

.subtitle {
  color: var(--text2);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.steps {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin: 28px 0 32px;
  flex-wrap: wrap;
}

.step {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--surface2);
  border: 1px solid transparent;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text3);
  transition: all 0.3s ease;
}

.step.active {
  background: linear-gradient(135deg, var(--surface), var(--surface2));
  border-color: var(--primary);
  color: var(--text);
  box-shadow: var(--glow);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  font-size: 0.85rem;
}

.step.active .step-num {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 50%;
  padding: 2px;
}

.card {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  transition: border-color 0.3s;
}

.card:hover {
  border-color: rgba(255,255,255,0.1);
}

.card h2, .card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

.drop-zone {
  border: 2px dashed var(--surface3);
  border-radius: var(--radius);
  padding: 48px 32px;
  text-align: center;
  cursor: pointer;
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}

.drop-zone::before {
  content: '📂';
  font-size: 3rem;
  display: block;
  margin-bottom: 12px;
}

.drop-zone p {
  color: var(--text2);
  font-size: 0.95rem;
}

.drop-zone .hint {
  font-size: 0.78rem;
  color: var(--text3);
  margin-top: 6px;
}

.drop-zone:hover,
.drop-zone.dragging {
  border-color: var(--primary);
  background: rgba(108,99,255,0.06);
  box-shadow: 0 0 30px rgba(108,99,255,0.1);
}

.drop-zone.dragging::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: var(--radius);
  border: 2px dashed var(--primary-light);
  animation: pulse-border 1s ease infinite;
}

@keyframes pulse-border {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.columns {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 20px;
}

.col { min-width: 0; }

.parts-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  max-height: 420px;
  overflow-y: auto;
  padding-right: 4px;
}

.parts-grid::-webkit-scrollbar { width: 4px; }
.parts-grid::-webkit-scrollbar-thumb { background: var(--surface3); border-radius: 4px; }

.part-card {
  padding: 12px 16px;
  border: 1px solid var(--surface3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.25s ease;
  flex: 1 1 calc(50% - 8px);
  min-width: 130px;
  position: relative;
  overflow: hidden;
}

.part-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--text3);
  transition: background 0.3s;
}

.part-card:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.part-card.selected {
  border-color: var(--primary);
  background: rgba(108,99,255,0.08);
}

.part-card.selected::before { background: var(--primary); }

.part-card.deselected {
  opacity: 0.35;
  filter: grayscale(1);
}

.part-name {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text);
}

.part-size {
  display: block;
  font-size: 0.75rem;
  color: var(--text2);
  margin-top: 2px;
}

.part-contours {
  display: block;
  font-size: 0.7rem;
  color: var(--text3);
  margin-top: 1px;
}

.sheet-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
  padding: 8px;
  background: var(--surface2);
  border-radius: var(--radius-sm);
}
.sheet-nav .sheet-label {
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
}
.sheet-nav button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.canvas-wrapper {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}

.render-canvas {
  border-radius: var(--radius-sm);
  max-width: 100%;
  background: #1a1a2e;
  box-shadow: inset 0 0 30px rgba(0,0,0,0.3);
}

.canvas-placeholder {
  padding: 60px 20px;
  text-align: center;
  color: var(--text3);
  font-style: italic;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px dashed var(--surface3);
}

.config-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.config-grid label {
  display: flex;
  flex-direction: column;
  font-size: 0.78rem;
  color: var(--text2);
  font-weight: 500;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.config-grid input,
.config-grid select {
  margin-top: 6px;
  padding: 9px 12px;
  background: var(--surface2);
  border: 1px solid var(--surface3);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text);
  transition: border-color 0.25s, box-shadow 0.25s;
  outline: none;
  font-family: inherit;
}

.config-grid input:focus,
.config-grid select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.15);
}

.config-grid input[type="number"] { -moz-appearance: textfield; }

.checkbox-label {
  flex-direction: row !important;
  align-items: center;
  gap: 8px;
  text-transform: none !important;
  font-size: 0.85rem !important;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  margin: 0;
}

.btn-primary {
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--primary), #5a52e0);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.3s ease;
  letter-spacing: 0.3px;
  font-family: inherit;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(108,99,255,0.35);
}

.btn-primary:disabled {
  background: var(--surface3);
  color: var(--text3);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  padding: 8px 16px;
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--surface3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.82rem;
  transition: all 0.25s;
  font-family: inherit;
}

.btn-secondary:hover {
  border-color: var(--primary);
  background: rgba(108,99,255,0.1);
}

.nesting-stats {
  display: flex;
  gap: 12px;
  margin: 14px 0;
  flex-wrap: wrap;
}

.nesting-stats span {
  padding: 8px 18px;
  background: var(--surface2);
  border: 1px solid var(--surface3);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text2);
  display: flex;
  align-items: center;
  gap: 6px;
}

.nesting-stats span strong { color: var(--accent); }

.warning {
  padding: 12px 18px;
  background: rgba(255,200,87,0.1);
  border: 1px solid rgba(255,200,87,0.2);
  border-radius: var(--radius-sm);
  margin: 12px 0;
  font-size: 0.85rem;
  color: var(--accent2);
  display: flex;
  align-items: center;
  gap: 8px;
}

.gcode-box {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 20px;
}

.gcode-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 14px 0 10px;
  flex-wrap: wrap;
}

.gcode-info {
  margin-right: auto;
  font-size: 0.78rem;
  color: var(--text3);
  font-weight: 500;
}

.gcode-text {
  background: #0d0d1a;
  color: #a6e22e;
  padding: 18px;
  border-radius: var(--radius-sm);
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.75rem;
  line-height: 1.5;
  overflow-x: auto;
  max-height: 450px;
  overflow-y: auto;
  white-space: pre;
  border: 1px solid rgba(255,255,255,0.04);
  tab-size: 2;
}

.gcode-text::-webkit-scrollbar { width: 4px; height: 4px; }
.gcode-text::-webkit-scrollbar-thumb { background: var(--surface3); border-radius: 4px; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.tag-primary { background: rgba(108,99,255,0.15); color: var(--primary-light); }
.tag-success { background: rgba(0,212,170,0.15); color: var(--accent); }
.tag-warning { background: rgba(255,200,87,0.15); color: var(--accent2); }
.tag-danger { background: rgba(255,71,87,0.15); color: var(--danger); }

.msg {
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  margin: 12px 0;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.msg-error {
  background: rgba(255,71,87,0.1);
  border: 1px solid rgba(255,71,87,0.2);
  color: var(--danger);
}

.msg-success {
  background: rgba(0,212,170,0.1);
  border: 1px solid rgba(0,212,170,0.2);
  color: var(--accent);
}

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px;
  color: var(--text2);
  font-size: 0.9rem;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--surface3);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.section-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 28px 0 20px;
  color: var(--text3);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.section-divider::before,
.section-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--surface3), transparent);
}

/* ─── Simulation Fullscreen ─────────────────────────────────────────────── */
.sim-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #0b0b16;
  display: flex;
  flex-direction: column;
  animation: simFade 0.2s ease;
}
@keyframes simFade { from { opacity: 0 } to { opacity: 1 } }

.sim-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: #12121f;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  flex-shrink: 0;
}
.sim-header h3 { margin: 0; font-size: 0.95rem; font-weight: 600; color: var(--text) }
.sim-header-controls { display: flex; align-items: center; gap: 16px }

.sim-info-bar {
  display: flex;
  gap: 18px;
  font-size: 0.75rem;
  font-family: 'JetBrains Mono', 'Consolas', monospace;
}
.sim-info-bar span { white-space: nowrap }
.il { color: var(--text3); margin-right: 4px; font-weight: 500; text-transform: uppercase; font-size: 0.65rem }
.sim-info-bar span:last-child { color: var(--accent); font-weight: 600 }

.sim-close-btn {
  background: none;
  border: none;
  color: var(--text3);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: all 0.2s;
}
.sim-close-btn:hover { background: rgba(255,255,255,0.06); color: var(--text) }

.sim-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  position: relative;
}

.sim-controls-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: #12121f;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  flex-shrink: 0;
}
.scb-btn {
  width: 32px; height: 32px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 6px;
  background: rgba(255,255,255,0.04);
  color: var(--text2);
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.scb-btn:hover { background: rgba(255,255,255,0.08) }
.scb-btn:disabled { opacity: 0.25; cursor: not-allowed }
.scb-btn.play { color: var(--accent); border-color: rgba(0,212,170,0.3) }
.scb-btn.play:hover { background: rgba(0,212,170,0.1) }
.scb-btn.pause { color: var(--accent2); border-color: rgba(255,200,87,0.3) }
.scb-btn.pause:hover { background: rgba(255,200,87,0.1) }
.scb-btn.reset { color: var(--danger); border-color: rgba(255,71,87,0.3) }
.scb-btn.reset:hover { background: rgba(255,71,87,0.1) }
.scb-divider { width: 1px; height: 22px; background: rgba(255,255,255,0.06); margin: 0 4px }
.scb-speed { display: flex; align-items: center; gap: 6px; font-size: 0.72rem; color: var(--text3) }
.scb-speed select {
  padding: 3px 6px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 4px;
  color: var(--text2);
  font-size: 0.72rem;
  font-family: inherit;
  cursor: pointer;
}
.scb-speed input[type="range"] {
  width: 72px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(255,255,255,0.15);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.scb-speed input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid rgba(255,255,255,0.2);
  cursor: pointer;
  transition: transform 0.1s;
}
.scb-speed input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}
.scb-speed input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid rgba(255,255,255,0.2);
  cursor: pointer;
}
#simSpeedLabel {
  min-width: 32px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  color: var(--text2);
}
.scb-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  color: var(--text3);
  cursor: pointer;
  margin-left: auto;
}
.scb-toggle input { accent-color: var(--primary) }

.sim-viewport {
  flex: 1;
  position: relative;
  min-height: 0;
}

.sim-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  background: #080810;
}

.sim-canvas-3d {
  position: absolute;
  inset: 0;
  display: none;
}
.sim-canvas-3d canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.scb-btn.view-toggle {
  color: var(--accent);
  border-color: rgba(0,212,170,0.3);
  font-size: 1rem;
}
.scb-btn.view-toggle:hover {
  background: rgba(0,212,170,0.1);
}
.scb-btn.view-toggle.active {
  background: rgba(0,212,170,0.15);
  box-shadow: 0 0 12px rgba(0,212,170,0.2);
}

/* ─── Auth ─────────────────────────────────────────────────────────────────── */
#authDisplay { display: inline-flex; align-items: center; gap: 8px }

/* ─── Login Page ──────────────────────────────────────────────────────────── */
#loginPage {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  background-image: radial-gradient(ellipse at 50% 0%, rgba(108,99,255,0.08) 0%, transparent 70%);
}
.login-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  padding: 20px;
  width: 100%;
  max-width: 400px;
}
.login-brand { text-align: center }
.login-logo-img {
  width: 120px; height: 120px;
  margin: 0 auto 16px;
  object-fit: contain;
  filter: drop-shadow(0 8px 40px rgba(108,99,255,0.25));
}
.login-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 1px;
}
.login-subtitle {
  color: var(--text3);
  font-size: 0.85rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-top: 6px;
}
.login-box {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}
.login-form-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text);
}
.login-label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 0.75rem;
  color: var(--text2);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  margin-bottom: 14px;
}
.login-input {
  padding: 10px 14px;
  background: var(--surface2);
  border: 1px solid var(--surface3);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text);
  font-family: inherit;
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
}
.login-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.15);
}
.login-btn {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, var(--primary), #5a52e0);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  font-family: inherit;
  letter-spacing: 0.5px;
  margin-top: 4px;
}
.login-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(108,99,255,0.35);
}
.login-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}
.login-switch {
  text-align: center;
  margin-top: 18px;
  font-size: 0.82rem;
  color: var(--text3);
}
.login-switch a {
  color: var(--primary-light);
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
}
.login-switch a:hover { text-decoration: underline }
.login-msg {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  font-size: 0.82rem;
}
.login-error {
  background: rgba(255,71,87,0.1);
  border: 1px solid rgba(255,71,87,0.2);
  color: var(--danger);
}
.login-success {
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.2);
  color: #22c55e;
}
.user-avatar-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 12px 5px 5px;
  background: var(--surface2); border: 1px solid var(--surface3);
  border-radius: 50px; cursor: pointer;
  transition: all 0.25s; font-family: inherit;
  color: var(--text);
}
.user-avatar-btn:hover { border-color: var(--primary); background: rgba(108,99,255,0.1) }
.user-avatar {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.5px; flex-shrink: 0;
}
.user-name { font-size: 0.82rem; font-weight: 500; color: var(--text) }

/* ─── Auth Tabs ──────────────────────────────────────────────────────────── */
.modal-auth { width: 420px; padding: 24px }
.auth-tabs {
  display: flex; gap: 0; margin-bottom: 20px;
  background: var(--surface2); border-radius: var(--radius-sm);
  overflow: hidden; border: 1px solid var(--surface3);
}
.auth-tab {
  flex: 1; padding: 10px 16px;
  background: transparent; border: none;
  color: var(--text3); font-size: 0.82rem; font-weight: 500;
  cursor: pointer; transition: all 0.25s;
  font-family: inherit;
}
.auth-tab:hover { color: var(--text2); background: rgba(255,255,255,0.03) }
.auth-tab.active {
  background: var(--surface); color: var(--text);
  box-shadow: inset 0 -2px 0 var(--primary);
}
.auth-panel { display: none }
.auth-panel.active { display: block }

/* ─── Password Strength ──────────────────────────────────────────────────── */
.password-strength {
  display: flex; align-items: center; gap: 8px;
  margin: -8px 0 12px; height: 20px;
}
.pw-bar {
  flex: 1; height: 4px; background: var(--surface3);
  border-radius: 2px; transition: all 0.3s;
}
.pw-text {
  font-size: 0.7rem; font-weight: 600;
  min-width: 36px; text-align: right;
  text-transform: uppercase; letter-spacing: 0.5px;
}

/* ─── Plan Badge ─────────────────────────────────────────────────────────── */
.plan-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 10px; border-radius: 50px;
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.5px;
  text-transform: uppercase;
}
.plan-badge.free {
  background: rgba(108,99,255,0.12); color: var(--primary-light);
  border: 1px solid rgba(108,99,255,0.2);
}
.plan-badge.pro {
  background: rgba(0,212,170,0.12); color: var(--accent);
  border: 1px solid rgba(0,212,170,0.2);
}

/* ─── Pricing Modal ─────────────────────────────────────────────────────── */
.modal-pricing { width: 680px; max-width: 95vw; padding: 28px }
.pricing-grid { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap }
.pricing-card {
  flex: 1; min-width: 240px; max-width: 300px;
  background: var(--surface2); border: 1px solid var(--surface3);
  border-radius: var(--radius); padding: 24px;
  display: flex; flex-direction: column; gap: 16px;
  text-align: center; transition: all 0.3s;
}
.pricing-card:hover { border-color: rgba(255,255,255,0.12); transform: translateY(-2px) }
.pricing-card.pro-card {
  background: linear-gradient(135deg, rgba(108,99,255,0.08), rgba(0,212,170,0.04));
  border-color: rgba(108,99,255,0.25);
  box-shadow: 0 0 30px rgba(108,99,255,0.08);
}
.pricing-card.current { border-color: var(--accent); box-shadow: 0 0 20px rgba(0,212,170,0.1) }
.pricing-card h3 { font-size: 1.1rem; font-weight: 700; margin: 0 }
.pricing-value { margin: 4px 0 }
.price { font-size: 2rem; font-weight: 800; color: var(--text) }
.price-free { font-size: 1.5rem; font-weight: 700; color: var(--text2) }
.price-period { font-size: 0.85rem; color: var(--text3); margin-left: 4px }
.pricing-features { list-style: none; padding: 0; margin: 0; text-align: left }
.pricing-features li {
  padding: 6px 0; font-size: 0.82rem; color: var(--text2);
  display: flex; align-items: center; gap: 8px;
}
.pricing-features li::before { content: '✅'; font-size: 0.75rem }
.pricing-current {
  font-size: 0.78rem; color: var(--accent); font-weight: 600;
  padding: 8px; border-radius: var(--radius-sm);
  background: rgba(0,212,170,0.06);
}
.pricing-btn { width: 100%; margin-top: auto }

/* ─── Upgrade Banner (no G-Code) ────────────────────────────────────────── */
.upgrade-banner,
.upgrade-prompt {
  background: linear-gradient(135deg, rgba(108,99,255,0.1), rgba(0,212,170,0.05));
  border: 1px solid rgba(108,99,255,0.2);
  border-radius: var(--radius-sm); padding: 12px 16px; margin: 12px 0;
}
.upgrade-banner-content {
  display: flex; align-items: center; gap: 12px;
  font-size: 0.85rem; color: var(--text2); flex-wrap: wrap;
}

/* ─── Admin Modal ───────────────────────────────────────────────────────── */
.modal-admin { width: 800px; max-width: 95vw; padding: 24px; max-height: 90vh; overflow-y: auto }
.admin-stats { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px }
.admin-stat-card {
  flex: 1; min-width: 100px;
  padding: 14px 16px; background: var(--surface2);
  border: 1px solid var(--surface3); border-radius: var(--radius-sm);
  text-align: center; font-size: 0.72rem; color: var(--text3);
}
.admin-stat-card strong { display: block; font-size: 1.4rem; color: var(--text); margin-bottom: 4px }
.admin-users-list {
  display: flex; flex-direction: column; gap: 8px;
  max-height: 400px; overflow-y: auto; margin-top: 8px;
}
.admin-user-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; background: var(--surface2);
  border: 1px solid var(--surface3); border-radius: var(--radius-sm);
  gap: 12px; flex-wrap: wrap;
}
.admin-user-info { display: flex; flex-direction: column; gap: 2px; min-width: 0 }
.admin-user-info strong { font-size: 0.85rem; color: var(--text) }
.admin-user-email { font-size: 0.72rem; color: var(--text3) }
.admin-user-meta { font-size: 0.68rem; color: var(--text3) }
.admin-user-actions { display: flex; align-items: center; gap: 6px; flex-shrink: 0 }
.admin-plan-select {
  padding: 4px 8px; background: var(--surface);
  border: 1px solid var(--surface3); border-radius: 4px;
  color: var(--text); font-size: 0.75rem; font-family: inherit;
  cursor: pointer; outline: none;
}
.admin-plan-select:focus { border-color: var(--primary) }
.btn-warning { background: var(--danger); color: #fff; border: none; padding: 4px 10px; border-radius: var(--radius-sm); font-size: 0.75rem; cursor: pointer; font-family: inherit }

/* ─── Admin Tabs ────────────────────────────────────────────────────────── */
.admin-tabs { display: flex; gap: 0; margin-bottom: 12px; border-bottom: 2px solid var(--surface3) }
.admin-tab {
  padding: 8px 18px; background: transparent; border: none;
  color: var(--text3); font-size: 0.85rem; cursor: pointer;
  font-family: inherit; border-bottom: 2px solid transparent;
  margin-bottom: -2px; transition: all 0.2s;
}
.admin-tab:hover { color: var(--text); background: var(--surface2) }
.admin-tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600 }

/* ─── Activity Log ──────────────────────────────────────────────────────── */
.admin-activity-list {
  display: flex; flex-direction: column; gap: 6px;
  max-height: 500px; overflow-y: auto;
}
.admin-activity-row {
  padding: 8px 12px; background: var(--surface2);
  border: 1px solid var(--surface3); border-radius: var(--radius-sm);
  font-size: 0.78rem;
}
.admin-activity-header {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.admin-activity-header strong { color: var(--text); font-size: 0.82rem }
.admin-activity-action {
  color: var(--text2); font-family: monospace; font-size: 0.72rem;
  background: var(--surface); padding: 1px 6px; border-radius: 3px;
}
.admin-activity-status { font-size: 0.85rem; margin-left: auto }
.admin-activity-detail {
  display: flex; gap: 12px; flex-wrap: wrap;
  margin-top: 4px; color: var(--text3); font-size: 0.7rem;
}
.admin-pagination {
  display: flex; align-items: center; justify-content: center;
  gap: 12px; margin-top: 12px; font-size: 0.82rem; color: var(--text3);
}

/* ─── Admin Metrics ─────────────────────────────────────────────────────── */
.metrics-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 16px }
.metrics-card {
  background: var(--surface2); border: 1px solid var(--surface3);
  border-radius: var(--radius-sm); padding: 16px;
}
.metrics-card h4 { font-size: 0.82rem; color: var(--text2); margin: 0 0 12px }
.metrics-card canvas { max-height: 220px; max-width: 100% }

@media (max-width: 768px) {
  .metrics-grid { grid-template-columns: 1fr }
}

/* ─── Header responsive ─────────────────────────────────────────────────── */
#projectBar { gap: 6px; flex-wrap: wrap }

@media (max-width: 768px) {
  .columns { grid-template-columns: 1fr; }
  .steps { flex-wrap: wrap; }
  .app-header h1 { font-size: 2rem; }
  .config-grid { grid-template-columns: 1fr 1fr; }
  .pricing-grid { flex-direction: column; align-items: center }
  .pricing-card { max-width: 100% }
  .admin-stats { flex-direction: column }
  #projectBar { flex-direction: column; align-items: stretch; gap: 4px }
}