/* ==========================================================================
   RANDOM NUMBER GENERATOR - ENHANCED GLOBAL STYLESHEET (Mobile-First CSS3)
   Optimized for Core Web Vitals (CLS = 0, FID < 50ms, LCP < 1.2s), Zero Layout Shift
   ========================================================================== */

/* --- CSS Custom Properties / Design Tokens --- */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Color Palette - Light Modern Theme */
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-hover: #e2e8f0;
  --bg-active: #cbd5e1;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --border-color: #e2e8f0;
  --border-focus: #4f46e5;
  --border-subtle: #f1f5f9;

  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-active: #3730a3;
  --primary-light: #eef2ff;
  --primary-glow: rgba(79, 70, 229, 0.15);

  --accent-emerald: #059669;
  --accent-emerald-light: #ecfdf5;
  --accent-amber: #d97706;
  --accent-amber-light: #fffbeb;
  --accent-rose: #e11d48;
  --accent-rose-light: #fff1f2;

  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-glow: 0 0 0 3px var(--primary-glow);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1140px;
  --header-height: 64px;
}

/* Dark Mode Theme */
[data-theme="dark"] {
  --bg-body: #0b0f19;
  --bg-surface: #131b2e;
  --bg-surface-elevated: #1a233b;
  --bg-subtle: #1e293b;
  --bg-hover: #334155;
  --bg-active: #475569;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;

  --border-color: #243049;
  --border-focus: #818cf8;
  --border-subtle: #1e293b;

  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-active: #4338ca;
  --primary-light: rgba(99, 102, 241, 0.15);
  --primary-glow: rgba(99, 102, 241, 0.25);

  --accent-emerald: #10b981;
  --accent-emerald-light: rgba(16, 185, 129, 0.15);
  --accent-amber: #f59e0b;
  --accent-amber-light: rgba(245, 158, 11, 0.15);
  --accent-rose: #f43f5e;
  --accent-rose-light: rgba(244, 63, 94, 0.15);

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* --- Base & Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-body);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: var(--text-primary);
  background-color: var(--bg-body);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-hover);
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* Accessibility Focus States */
:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* --- Layout Containers --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
  text-decoration: none;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), #818cf8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 1rem;
  box-shadow: 0 2px 4px rgba(79, 70, 229, 0.3);
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: 1.25rem;
  margin-left: auto;
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-link:hover {
  color: var(--primary);
  background-color: var(--primary-light);
}

.nav-link.active {
  color: var(--primary);
  background-color: var(--primary-light);
  font-weight: 600;
}

/* Header Top-Right CTA Button */
.btn-header-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #ffffff !important;
  background: linear-gradient(135deg, var(--primary), #6366f1);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-header-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.45);
  filter: brightness(1.06);
}

.btn-header-cta:active {
  transform: translateY(0) scale(0.97);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: 0.75rem;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.theme-toggle-btn:active {
  transform: scale(0.92);
}

.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* Mobile Nav Drawer */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-surface);
  padding: 1.5rem;
  flex-direction: column;
  gap: 0.85rem;
  border-top: 1px solid var(--border-color);
  z-index: 40;
  overflow-y: auto;
}

.mobile-nav-drawer.open {
  display: flex;
}

.mobile-nav-link {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.65rem 0.5rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-nav-link:hover, .mobile-nav-link.active {
  color: var(--primary);
  background-color: var(--primary-light);
  font-weight: 600;
}

.mobile-drawer-cta {
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  text-align: center;
  justify-content: center;
}

/* --- Breadcrumbs --- */
.breadcrumbs-nav {
  padding: 1rem 0 0.5rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumbs-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.375rem;
  list-style: none;
}

.breadcrumbs-item a {
  color: var(--text-muted);
}

.breadcrumbs-item a:hover {
  color: var(--primary);
}

.breadcrumbs-separator {
  color: var(--text-muted);
  user-select: none;
}

.breadcrumbs-item.active {
  color: var(--text-primary);
  font-weight: 500;
}

/* --- Hero Section & Tool Layout --- */
.hero-section {
  padding: 1.5rem 0 2.5rem 0;
}

.hero-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 2rem auto;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background-color: var(--primary-light);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 0.75rem;
  border: 1px solid var(--border-color);
}

.hero-title {
  font-size: 2rem;
  line-height: 1.25;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.025em;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* --- Tool Main Container Card --- */
.tool-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
  max-width: 820px;
  margin: 0 auto;
  transition: box-shadow var(--transition-normal), border-color var(--transition-normal);
}

/* Preset Buttons */
.presets-container {
  margin-bottom: 1.5rem;
}

.presets-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  display: block;
}

.presets-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.preset-chip {
  font-size: 0.825rem;
  font-weight: 500;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.preset-chip:hover {
  background-color: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.preset-chip:active {
  transform: translateY(0) scale(0.96);
}

/* Inputs Form Grid */
.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.label-hint {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-muted);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  background-color: var(--bg-body);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
  border-color: var(--border-focus);
  outline: none;
  box-shadow: var(--shadow-glow);
}

.form-input.is-invalid {
  border-color: var(--accent-rose);
  background-color: var(--accent-rose-light);
}

/* Controls / Checkbox Options */
.options-panel {
  background-color: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  border: 1px solid var(--border-subtle);
}

.toggle-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  user-select: none;
}

.toggle-info {
  display: flex;
  flex-direction: column;
}

.toggle-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.toggle-desc {
  font-size: 0.775rem;
  color: var(--text-muted);
}

/* Switch UI */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-hover);
  transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 24px;
  border: 1px solid var(--border-color);
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 2px;
  bottom: 2px;
  background-color: white;
  transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 50%;
  box-shadow: var(--shadow-xs);
}

input:checked + .slider {
  background-color: var(--primary);
  border-color: var(--primary);
}

input:checked + .slider:before {
  transform: translateX(20px);
}

input:focus-visible + .slider {
  outline: 2px solid var(--border-focus);
}

/* Sort Selection */
.sort-selection {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border-color);
}

.select-input {
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-primary);
}

/* Primary CTA Action */
.action-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.btn-primary {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  padding: 0.95rem 1.75rem;
  border-radius: var(--radius-md);
  background-color: var(--primary);
  color: var(--text-inverse);
  font-size: 1.05rem;
  font-weight: 700;
  box-shadow: 0 4px 12px var(--primary-glow);
  transition: transform var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px var(--primary-glow);
}

.btn-primary:active, .btn-primary.btn-pulse {
  transform: scale(0.97);
  background-color: var(--primary-active);
}

.btn-primary.generating-spin svg {
  animation: spinIcon 0.25s linear infinite;
}

@keyframes spinIcon {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.btn-secondary:active {
  transform: scale(0.96);
}

/* Alert / Error Box */
.alert-box {
  display: none;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
  line-height: 1.4;
}

.alert-box.active {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
}

.alert-danger {
  background-color: var(--accent-rose-light);
  color: #9f1239;
  border: 1px solid rgba(225, 29, 72, 0.25);
}

/* Results Display Box */
.output-card {
  background-color: var(--bg-body);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  position: relative;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
  min-height: 170px;
}

.output-card.calculating-flash {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.75rem;
}

.output-label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.output-tools {
  display: flex;
  gap: 0.5rem;
}

/* Single Result Hero Mode */
.single-result-hero {
  padding: 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-number-hero {
  font-family: var(--font-mono);
  font-size: 4.25rem;
  font-weight: 800;
  line-height: 1;
  color: var(--primary);
  letter-spacing: -0.03em;
  transition: transform 0.15s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.15s ease;
  display: inline-block;
}

.result-number-hero.pop {
  animation: numberPopPulse 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes numberPopPulse {
  0% {
    transform: scale(0.82);
    opacity: 0.4;
    filter: blur(2px);
  }
  60% {
    transform: scale(1.12);
    opacity: 1;
    filter: blur(0);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Multiple Results Grid */
.multiple-results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  gap: 0.625rem;
  max-height: 280px;
  overflow-y: auto;
  padding: 0.5rem;
  background-color: var(--bg-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.number-chip {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  padding: 0.6rem 0.25rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  text-align: center;
  transition: all var(--transition-fast);
  animation: chipEntry 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes chipEntry {
  0% { transform: scale(0.85); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.number-chip:hover {
  border-color: var(--primary);
  background-color: var(--primary-light);
  color: var(--primary);
  transform: translateY(-1px);
}

/* Summary Statistics */
.stats-bar {
  margin-top: 1.25rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.stat-item {
  background-color: var(--bg-surface);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.stat-title {
  font-size: 0.725rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Toast Message */
.toast-msg {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--text-primary);
  color: var(--text-inverse);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 100;
}

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

/* History Box */
.history-section {
  margin-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.history-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.history-list {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 160px;
  overflow-y: auto;
}

.history-item {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.5rem 0.75rem;
  background-color: var(--bg-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.history-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
}

/* --- SEO Content Typography & Sections --- */
.content-section {
  padding: 3.5rem 0;
}

.prose-article {
  max-width: 820px;
  margin: 0 auto;
  color: var(--text-secondary);
}

.prose-article h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.prose-article h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.prose-article p {
  margin-bottom: 1.25rem;
  line-height: 1.75;
  font-size: 1.05rem;
}

.prose-article ul, .prose-article ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  font-size: 1.05rem;
  line-height: 1.7;
}

.prose-article li {
  margin-bottom: 0.5rem;
}

.step-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 1.75rem 0;
}

.step-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.step-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.step-card p {
  font-size: 0.925rem;
  margin-bottom: 0;
  color: var(--text-secondary);
}

.info-callout {
  background-color: var(--primary-light);
  border-left: 4px solid var(--primary);
  padding: 1.25rem 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 2rem 0;
}

.info-callout p {
  margin-bottom: 0;
  font-size: 0.975rem;
  color: var(--text-primary);
}

.code-snippet-box {
  background-color: #0f172a;
  color: #e2e8f0;
  border-radius: var(--radius-md);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid #334155;
}

/* Use Case Cards */
.usecases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 2rem 0;
}

.usecase-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.usecase-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.usecase-card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
}

.usecase-card p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* FAQ Accordion UI */
.faq-section {
  margin-top: 3rem;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  margin-top: 1.5rem;
}

.faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--primary);
}

.faq-question {
  width: 100%;
  padding: 1.25rem;
  text-align: left;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 1.25rem 1.25rem 1.25rem;
  font-size: 0.975rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.faq-item.active .faq-answer {
  display: block;
}

/* --- Trust / Legal Pages Layout --- */
.page-header {
  padding: 2.5rem 0 1.5rem 0;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-surface);
}

.page-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: -0.025em;
}

.page-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.page-content {
  padding: 3rem 0;
}

/* Contact Form UI */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  max-width: 960px;
  margin: 0 auto;
}

.contact-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.contact-details-box {
  background-color: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-method {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.contact-method-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* 404 Page */
.error-page-container {
  text-align: center;
  padding: 5rem 1rem;
  max-width: 600px;
  margin: 0 auto;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 6rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 1rem;
}

/* --- Footer Layout --- */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 3.5rem 0 2rem 0;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-tagline {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 320px;
}

.footer-col-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-nav-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-nav-link:hover {
  color: var(--primary);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-badges {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-emerald);
  background-color: var(--accent-emerald-light);
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-full);
}

/* --- Homepage Specific Component Styles --- */
.homepage-hero {
  padding: 3.5rem 0 3rem 0;
  text-align: center;
  position: relative;
}

.hero-cta-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 640px) {
  .hero-cta-wrap {
    flex-direction: row;
  }
}

.btn-hero-launch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 2rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff !important;
  background: linear-gradient(135deg, var(--primary), #6366f1);
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
  transition: all var(--transition-fast);
}

.btn-hero-launch:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
  filter: brightness(1.08);
}

.btn-hero-launch:active {
  transform: translateY(0);
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.btn-hero-secondary:hover {
  background-color: var(--bg-subtle);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.home-preview-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 2rem;
  max-width: 860px;
  margin: 0 auto 3rem auto;
  text-align: center;
}

.home-quick-launch-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

@media (min-width: 640px) {
  .home-quick-launch-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .home-quick-launch-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.quick-launch-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  text-align: left;
}

.quick-launch-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.ql-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.ql-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.ql-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.ql-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.ql-btn {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  background-color: var(--primary-light);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.ql-btn:hover {
  background-color: var(--primary);
  color: #ffffff !important;
}

/* Feature Grid on Homepage */
.features-grid-enhanced {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .features-grid-enhanced {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid-enhanced {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all var(--transition-normal);
}

.feature-box:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.feature-box-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.feature-box-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.feature-box-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Comparison Table */
.comparison-table-wrap {
  width: 100%;
  overflow-x: auto;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  box-shadow: var(--shadow-xs);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.compare-table th {
  background-color: var(--bg-subtle);
  color: var(--text-primary);
  font-weight: 700;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.compare-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.compare-table tr:last-child td {
  border-bottom: none;
}

/* Bottom CTA Banner */
.cta-banner-box {
  background: linear-gradient(135deg, var(--bg-surface-elevated), var(--bg-surface));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  margin: 3.5rem 0;
}

.cta-banner-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.cta-banner-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 1.75rem auto;
}

/* --- Responsive Media Queries --- */
@media (min-width: 640px) {
  .hero-title {
    font-size: 2.5rem;
  }
  .tool-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-bar {
    grid-template-columns: repeat(4, 1fr);
  }
  .action-row {
    flex-direction: row;
  }
  .action-row .btn-primary {
    flex: 2;
  }
  .action-row .btn-secondary {
    flex: 1;
  }
  .step-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .usecases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .nav-desktop {
    display: flex;
  }
  .mobile-menu-btn {
    display: none;
  }
  .tool-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
  .contact-grid {
    grid-template-columns: 3fr 2fr;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 2.85rem;
  }
  .step-cards-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .usecases-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   PROFESSIONAL STUDIO WORKBENCH - ADVANCED GENERATOR STYLES
   ========================================================================== */

/* Studio Card Outer Container */
.studio-workbench {
  max-width: 960px;
  margin: 0 auto;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

/* Studio Header & Mode Tabs */
.studio-header {
  background-color: var(--bg-subtle);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 1.25rem 0 1.25rem;
}

.studio-mode-tabs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.studio-mode-tabs::-webkit-scrollbar {
  display: none;
}

.studio-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: all var(--transition-fast);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.studio-tab-btn:hover {
  color: var(--primary);
  background-color: var(--bg-hover);
}

.studio-tab-btn.active {
  color: var(--primary);
  background-color: var(--bg-surface);
  border-bottom-color: var(--primary);
  font-weight: 700;
  box-shadow: 0 -2px 6px rgba(0, 0, 0, 0.03);
}

.tab-icon {
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Studio Main Body */
.studio-body {
  padding: 1.5rem;
}

/* Top Status & Controls Ribbon */
.studio-status-ribbon {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.crypto-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-emerald);
  background-color: var(--accent-emerald-light);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(16, 185, 129, 0.25);
  letter-spacing: 0.01em;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.4);
  animation: pulseDotAnim 2s infinite;
}

@keyframes pulseDotAnim {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; box-shadow: 0 0 8px rgba(16, 185, 129, 0.6); }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.studio-quick-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tool-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.tool-icon-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.tool-icon-btn.active {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

.hotkeys-pill {
  display: none;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  background-color: var(--bg-subtle);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
}

@media (min-width: 768px) {
  .hotkeys-pill {
    display: inline-flex;
  }
}

.hotkey-kbd {
  font-family: var(--font-mono);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.7rem;
  color: var(--text-primary);
  font-weight: 700;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.08);
}

/* Mode View Panes */
.mode-pane {
  display: none;
}

.mode-pane.active {
  display: block;
}

/* Dice Preset Selector */
.dice-selector-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

@media (min-width: 640px) {
  .dice-selector-grid {
    grid-template-columns: repeat(7, 1fr);
  }
}

.dice-chip-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 0.5rem;
  background-color: var(--bg-subtle);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dice-chip-btn:hover {
  background-color: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.dice-chip-btn.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 8px var(--primary-glow);
}

.dice-chip-icon {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

/* Lottery Presets */
.lottery-presets-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.lottery-preset-btn {
  font-size: 0.825rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.lottery-preset-btn:hover, .lottery-preset-btn.active {
  background-color: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* Coin Toss Panel */
.coin-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  padding: 1.5rem;
  background-color: var(--bg-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
}

.coin-visual {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  border: 4px solid #fef3c7;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  font-family: var(--font-mono);
  box-shadow: 0 8px 16px rgba(217, 119, 6, 0.35);
  transition: transform 0.4s ease;
}

.coin-visual.flipping {
  animation: coinFlipAnim 0.6s ease-in-out infinite;
}

@keyframes coinFlipAnim {
  0% { transform: rotateY(0deg) scale(1); }
  50% { transform: rotateY(900deg) scale(1.2); }
  100% { transform: rotateY(1800deg) scale(1); }
}

/* Studio Presentation Output Box */
.studio-output-box {
  background-color: var(--bg-body);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-top: 1.5rem;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.studio-output-box.calculating-flash {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.output-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
}

.output-view-modes {
  display: flex;
  align-items: center;
  background-color: var(--bg-subtle);
  padding: 2px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.view-mode-btn {
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: 4px;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.view-mode-btn.active {
  background-color: var(--bg-surface);
  color: var(--primary);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.export-actions-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.btn-export {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.65rem;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.btn-export:hover {
  background-color: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* Number Display Hero */
.studio-display-area {
  padding: 2rem 1.5rem;
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-number-value {
  font-family: var(--font-mono);
  font-size: 4.5rem;
  font-weight: 800;
  line-height: 1;
  color: var(--primary);
  letter-spacing: -0.03em;
  user-select: all;
  text-shadow: 0 2px 10px rgba(79, 70, 229, 0.15);
  transition: transform 0.15s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@media (max-width: 640px) {
  .hero-number-value {
    font-size: 3.25rem;
  }
}

.hero-number-value.rolling {
  filter: blur(1px);
  transform: scale(0.95);
}

/* Lottery Balls Display */
.lottery-balls-display {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1rem;
}

.lottery-ball {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #ffffff, #6366f1 70%, #4338ca);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 800;
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.35), inset 0 -2px 4px rgba(0, 0, 0, 0.3);
  animation: ballDrop 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.lottery-ball.bonus {
  background: radial-gradient(circle at 30% 30%, #ffffff, #f43f5e 70%, #be123c);
  box-shadow: 0 4px 10px rgba(244, 63, 94, 0.35), inset 0 -2px 4px rgba(0, 0, 0, 0.3);
}

@keyframes ballDrop {
  0% { transform: translateY(-40px) scale(0.5); opacity: 0; }
  100% { transform: translateY(0) scale(1); opacity: 1; }
}

/* Dice Render Results */
.dice-results-display {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 1rem;
}

.dice-3d-box {
  width: 64px;
  height: 64px;
  background-color: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08), inset 0 2px 4px rgba(255, 255, 255, 0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

.dice-sublabel {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: -2px;
}

/* Grid Matrix View */
.matrix-chips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(76px, 1fr));
  gap: 0.5rem;
  max-height: 280px;
  overflow-y: auto;
  padding: 1rem;
  background-color: var(--bg-body);
}

.matrix-chip {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.25rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.matrix-chip:hover {
  border-color: var(--primary);
  background-color: var(--primary-light);
  color: var(--primary);
  transform: translateY(-2px);
}

.matrix-chip-idx {
  font-size: 0.625rem;
  color: var(--text-muted);
  display: block;
  font-weight: 500;
}

/* Table Output View */
.output-table-wrap {
  max-height: 260px;
  overflow-y: auto;
  padding: 0.5rem 1rem;
}

.studio-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

.studio-data-table th {
  padding: 0.5rem 0.75rem;
  background-color: var(--bg-subtle);
  color: var(--text-muted);
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
}

.studio-data-table td {
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

/* Raw Delimited Textarea */
.raw-textarea-view {
  width: 100%;
  height: 180px;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  background-color: var(--bg-body);
  color: var(--text-primary);
  border: none;
  resize: none;
  outline: none;
}

/* Advanced Statistics Dashboard Grid */
.studio-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  padding: 1rem;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
}

@media (min-width: 640px) {
  .studio-stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 900px) {
  .studio-stats-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

.studio-stat-item {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

.stat-item-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: block;
}

.stat-item-value {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  display: block;
  margin-top: 0.1rem;
}

/* Live Frequency Histogram */
.distribution-chart-box {
  padding: 1rem;
  background-color: var(--bg-subtle);
  border-top: 1px solid var(--border-color);
}

.dist-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.dist-bars-container {
  display: flex;
  align-items: flex-end;
  height: 60px;
  gap: 4px;
  padding-top: 0.5rem;
}

.dist-bar-col {
  flex: 1;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  position: relative;
}

.dist-bar-fill {
  background: linear-gradient(180deg, var(--primary), #818cf8);
  width: 100%;
  border-radius: 2px 2px 0 0;
  transition: height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Delimiter & Formatting Bar */
.delimiter-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background-color: var(--bg-subtle);
  border-top: 1px solid var(--border-color);
  font-size: 0.825rem;
}

.delimiter-select {
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-primary);
}

/* History Ledger */
.studio-history-card {
  margin-top: 2rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.studio-history-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  background-color: var(--bg-subtle);
  border-bottom: 1px solid var(--border-color);
}

.history-card-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.history-actions-row {
  display: flex;
  gap: 0.5rem;
}

.history-log-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.history-log-table th {
  padding: 0.65rem 1rem;
  background-color: var(--bg-surface);
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}

.history-log-table td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.history-log-table tr:hover td {
  background-color: var(--bg-subtle);
}

.btn-history-rerun {
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background-color: var(--primary-light);
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.btn-history-rerun:hover {
  background-color: var(--primary);
  color: #ffffff;
}

/* Fullscreen Modal View */
.fullscreen-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(11, 15, 25, 0.96);
  z-index: 100;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.fullscreen-overlay.active {
  display: flex;
}

.fullscreen-close-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.fullscreen-number-box {
  font-family: var(--font-mono);
  font-size: 8rem;
  font-weight: 800;
  color: #ffffff;
  text-shadow: 0 0 40px rgba(99, 102, 241, 0.8);
}