/* ==========================================================================
   LIGHT & MATTER - MODERN LABORATORY DESIGN SYSTEM
   Dark glassmorphism, responsive grid, glowing scientific data visualization
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&family=Outfit:wght@500;600;700&display=swap');

:root {
  --bg-deep: #070a13;
  --bg-surface: #0e1526;
  --bg-surface-elevated: #162038;
  --bg-card: rgba(18, 26, 46, 0.75);
  --bg-card-hover: rgba(26, 38, 68, 0.85);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.18);
  --border-accent: rgba(0, 240, 255, 0.35);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --color-cyan: #00f0ff;
  --color-cyan-glow: rgba(0, 240, 255, 0.25);
  --color-pink: #ff2a6d;
  --color-pink-glow: rgba(255, 42, 109, 0.25);
  --color-emerald: #10b981;
  --color-amber: #f59e0b;
  --color-violet: #8b5cf6;
  --color-blue: #3b82f6;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Outfit', var(--font-sans);
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 22px;

  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6), 0 0 1px 1px rgba(255, 255, 255, 0.05);
  --shadow-glow: 0 0 20px -5px var(--color-cyan-glow);
}

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

body {
  background-color: var(--bg-deep);
  background-image: 
    radial-gradient(circle at 15% 10%, rgba(0, 240, 255, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 85% 15%, rgba(139, 92, 246, 0.07) 0%, transparent 45%),
    radial-gradient(circle at 50% 85%, rgba(255, 42, 109, 0.04) 0%, transparent 50%);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(14, 21, 38, 0.6);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.28);
}

/* App Container */
.app-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 24px 28px 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(255, 42, 109, 0.2));
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: var(--shadow-glow);
}

.brand-title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 50%, var(--color-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.header-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.badge-cyan {
  background: rgba(0, 240, 255, 0.1);
  border-color: rgba(0, 240, 255, 0.3);
  color: var(--color-cyan);
}

.badge-pulse::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-emerald);
  box-shadow: 0 0 8px var(--color-emerald);
  display: inline-block;
}

/* Control Panel Bar */
.control-bar {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 20px 24px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.control-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Select Material Dropdown */
.material-selector-wrapper {
  position: relative;
  min-width: 280px;
}

.select-custom {
  width: 100%;
  appearance: none;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 10px 38px 10px 14px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  transition: all 0.2s ease;
}

.select-custom:hover, .select-custom:focus {
  border-color: var(--color-cyan);
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
}

.select-icon {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--text-muted);
  font-size: 12px;
}

/* Category Filter Buttons */
.category-filter {
  display: inline-flex;
  background: rgba(0, 0, 0, 0.3);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  gap: 4px;
}

.filter-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.filter-btn.active {
  background: var(--color-cyan);
  color: #050811;
  font-weight: 600;
  box-shadow: 0 0 12px var(--color-cyan-glow);
}

/* Preset Buttons */
.presets-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.preset-chip {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.preset-chip:hover {
  background: rgba(255, 255, 255, 0.09);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.preset-chip.active {
  background: rgba(0, 240, 255, 0.12);
  border-color: var(--color-cyan);
  color: var(--color-cyan);
  font-weight: 600;
}

/* Wavelength Range Inputs */
.range-inputs {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 0, 0, 0.25);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.num-input-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
}

.num-input-wrap label {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.num-input {
  width: 70px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--color-cyan);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 4px 8px;
  text-align: center;
  outline: none;
  transition: border-color 0.2s;
}

.num-input:focus {
  border-color: var(--color-cyan);
}

/* Standard Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, #00f0ff 0%, #00a8ff 100%);
  color: #050811;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 240, 255, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--border-hover);
}

.btn-outline-cyan {
  background: rgba(0, 240, 255, 0.05);
  border-color: rgba(0, 240, 255, 0.3);
  color: var(--color-cyan);
}

.btn-outline-cyan:hover {
  background: rgba(0, 240, 255, 0.15);
  border-color: var(--color-cyan);
}

/* RefractiveIndex.INFO Export Toolbar Styles */
.export-btn-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.export-badge-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--color-cyan);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: var(--radius-sm);
  padding: 5px 9px;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

/* Main Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 24px;
}

@media (max-width: 1100px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

/* Card Common */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.card-header {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.card-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-title-icon {
  color: var(--color-cyan);
}

.card-body {
  padding: 22px;
}

/* Chart Container & Toolbar */
.chart-card {
  display: flex;
  flex-direction: column;
}

.chart-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 14px 22px;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--border-subtle);
}

.mode-pills {
  display: inline-flex;
  background: rgba(0, 0, 0, 0.4);
  padding: 3px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  gap: 3px;
}

.mode-pill {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.mode-pill:hover {
  color: var(--text-primary);
}

.mode-pill.active {
  background: var(--bg-surface-elevated);
  color: var(--color-cyan);
  font-weight: 600;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.chart-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.switch-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.switch-input {
  appearance: none;
  width: 34px;
  height: 18px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 9999px;
  position: relative;
  cursor: pointer;
  outline: none;
  transition: background-color 0.2s;
}

.switch-input::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  background: #ffffff;
  border-radius: 50%;
  transition: transform 0.2s;
}

.switch-input:checked {
  background: var(--color-pink);
}

.switch-input:checked::before {
  transform: translateX(16px);
}

.canvas-wrapper {
  position: relative;
  width: 100%;
  height: 480px;
  padding: 8px 12px 12px;
}

.spectrum-canvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
}

/* Hover Status Bar / Inspection Banner */
.inspector-bar {
  background: rgba(14, 21, 38, 0.85);
  border-top: 1px solid var(--border-subtle);
  padding: 12px 22px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 16px;
}

.inspector-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.inspector-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.inspector-val {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

.color-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  display: inline-block;
}

/* Material Properties Orbital Card */
.orbital-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.orbital-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (max-width: 960px) {
  .orbital-grid {
    grid-template-columns: 1fr;
  }
}

.element-hero {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
}

.element-symbol-box {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(139, 92, 246, 0.15));
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
}

.element-z {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--color-cyan);
}

.element-symbol {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
}

.element-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.element-name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: #ffffff;
}

.element-category {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Electron Configuration Display */
.prop-box {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
}

.prop-box-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.config-string {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-cyan);
  word-break: break-all;
}

/* Outer Orbitals List */
.orbitals-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.orbital-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
  transition: border-color 0.2s;
}

.orbital-item:hover {
  border-color: var(--border-hover);
}

.orbital-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.orbital-badge {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background: rgba(0, 240, 255, 0.1);
  color: var(--color-cyan);
  border: 1px solid rgba(0, 240, 255, 0.3);
}

.orbital-role-badge {
  font-size: 11px;
  color: var(--text-secondary);
}

.orbital-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Physics Note */
.physics-note {
  background: rgba(139, 92, 246, 0.08);
  border-left: 3px solid var(--color-violet);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 12px 14px;
  font-size: 12px;
  color: #e2e8f0;
  line-height: 1.5;
}

/* Parameters Metric Grid */
.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.metric-card {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 10px 12px;
}

.metric-label {
  font-size: 11px;
  color: var(--text-muted);
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 2px;
}

/* Collapsible Theory Accordion */
.theory-card {
  margin-top: 0;
}

.accordion-toggle {
  width: 100%;
  background: transparent;
  border: none;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}

.accordion-content {
  padding: 0 24px 24px;
  display: none;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.accordion-content.open {
  display: block;
}

.formula-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
  margin-top: 14px;
}

.formula-box {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}

.formula-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-cyan);
  margin-bottom: 8px;
}

.formula-math {
  font-family: var(--font-mono);
  font-size: 13px;
  background: rgba(255, 255, 255, 0.04);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: #ffffff;
  margin-bottom: 8px;
  overflow-x: auto;
}

/* Data Table Section */
.table-card {
  overflow: hidden;
}

.table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 16px 24px;
  background: rgba(0, 0, 0, 0.25);
  border-bottom: 1px solid var(--border-subtle);
}

.table-filter-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.table-wrapper {
  max-height: 400px;
  overflow-y: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}

.data-table th {
  position: sticky;
  top: 0;
  background: #0f172a;
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  z-index: 10;
}

.data-table td {
  padding: 10px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  font-family: var(--font-mono);
  color: var(--text-primary);
  white-space: nowrap;
}

.data-table tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

.table-pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 12px;
  color: var(--text-secondary);
}

.page-controls {
  display: flex;
  gap: 8px;
}

/* Custom Material Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 20px;
}

.modal-backdrop.open {
  display: flex;
}

.modal-window {
  background: var(--bg-surface);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
}

.modal-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
}

.form-input:focus {
  border-color: var(--color-cyan);
}

.modal-footer {
  padding: 18px 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: rgba(14, 21, 38, 0.95);
  border: 1px solid var(--color-cyan);
  box-shadow: 0 10px 30px rgba(0, 240, 255, 0.25);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  color: #ffffff;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 1000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .app-container {
    padding: 16px 12px;
  }
  .canvas-wrapper {
    height: 340px;
  }
  .control-row {
    flex-direction: column;
    align-items: stretch;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}