:root {
  --primary-rgb: 46, 121, 199; /* Nile Blue rgb */
  --accent-purple-rgb: 200, 154, 67; /* Brushed Gold rgb */
  --accent-blue-rgb: 46, 121, 199;
  --accent-cyan-rgb: 86, 167, 255;
  
  --surface-base: #F8F6F1; /* Warm Ivory */
  --surface: #FFFFFF; /* Soft Off-White */
  --surface-muted: #E6E2D9; /* Warm Gray Surface */
  --surface-overlay: #FFFFFF;
  --text-main: #07111F; /* Midnight Navy for high contrast */
  --text-muted: #5E6C84;
  --border-soft: #E6E2D9;
  --border-strong: #9C6E2E;
  
  --shadow-premium: inset 1px 1px 0px rgba(255, 255, 255, 0.7), 2px 2px 6px rgba(13, 26, 45, 0.06);
  --shadow-premium-lg: inset 1px 1px 0px rgba(255, 255, 255, 0.7), 4px 4px 12px rgba(13, 26, 45, 0.1);
  
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-3xl: 2.75rem;
  
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  
  --ease-spring: cubic-bezier(0.215, 0.61, 0.355, 1);
  --ease-smooth: cubic-bezier(0.215, 0.61, 0.355, 1);
  --duration-fast: 200ms;
}

.dark {
  --surface-base: #07111F; /* Midnight Navy primary background */
  --surface: #13233A; /* Accent Card Navy */
  --surface-muted: #0D1A2D; /* Deep Navy Surface */
  --surface-overlay: #0D1A2D;
  --text-main: #F8F6F1; /* Warm Ivory text */
  --text-muted: #8FA2C4;
  --border-soft: #1E2D4A;
  --border-strong: #2C3E61;
  --shadow-premium: inset 1px 1px 0px rgba(255, 255, 255, 0.07), 2px 2px 8px rgba(0, 0, 0, 0.45);
  --shadow-premium-lg: inset 1px 1px 0px rgba(255, 255, 255, 0.07), 4px 4px 16px rgba(0, 0, 0, 0.6);
}

/* Precision Carved UI Panels (No Glassmorphism Blur) */
.glass-panel {
  background: var(--surface-overlay);
  border: 2px solid var(--border-soft);
  box-shadow: var(--shadow-premium-lg);
}

.glass-card {
  background: var(--surface);
  border: 2px solid var(--border-soft);
  box-shadow: var(--shadow-premium);
}

.dark .glass-card {
  background: var(--surface);
  border-color: var(--border-soft);
}

html, body {
  max-width: 100%;
  overflow-x: hidden;
}

body {
  background: var(--surface-base);
  color: var(--text-main);
}

.page-shell {
  width: 100%;
  max-width: 80rem;
  margin-inline: auto;
  padding-inline: 1rem;
}

@media (min-width: 640px) {
  .page-shell {
    padding-inline: 1.5rem;
  }
}

.surface-card {
  background: var(--surface);
  color: var(--text-main);
  border: 2px solid var(--border-soft);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-premium);
}

/* Engineered Mechanical Buttons */
.btn-primary, .btn-secondary, .btn-danger, .btn-gold {
  min-height: 2.75rem;
  min-width: 2.75rem;
  border-radius: var(--radius-lg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: transform var(--duration-fast) var(--ease-spring), 
              background var(--duration-fast) var(--ease-smooth), 
              box-shadow var(--duration-fast) var(--ease-smooth),
              border-color var(--duration-fast) var(--ease-smooth);
}

.btn-primary:active, .btn-secondary:active, .btn-danger:active, .btn-gold:active {
  transform: translateY(1px);
}

.btn-primary:hover, .btn-secondary:hover, .btn-danger:hover, .btn-gold:hover {
  transform: translateY(-2px);
}

.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.btn-danger:focus-visible,
.btn-gold:focus-visible,
.input-standard:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 2px solid rgba(var(--primary-rgb), 0.65);
  outline-offset: 2px;
}

/* Carved Input Elements */
.input-standard {
  width: 100%;
  min-height: 2.75rem;
  border-radius: var(--radius-lg);
  border: 2px solid var(--border-soft);
  background: var(--surface-muted);
  color: var(--text-main);
  padding-inline: 1rem;
  padding-block: 0.625rem;
  box-shadow: inset 1px 2px 4px rgba(0, 0, 0, 0.08);
  outline: none;
  transition: border-color var(--duration-fast) var(--ease-smooth),
              background-color var(--duration-fast) var(--ease-smooth);
}

.input-standard:focus {
  border-color: rgb(var(--primary-rgb));
  background-color: var(--surface);
}

.input-standard::placeholder {
  color: var(--text-muted);
}

.responsive-table {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.responsive-table table {
  min-width: 42rem;
}

.mobile-stack {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 1024px) {
  .mobile-stack.lg-2 {
    grid-template-columns: 2fr 1fr;
  }
}

/* Shared components safety layer */
.card-premium {
  background: var(--surface);
  color: var(--text-main);
  border: 2px solid var(--border-soft);
  box-shadow: var(--shadow-premium);
}

.badge-premium {
  background: var(--surface-muted);
  color: var(--text-main);
  border: 2px solid var(--border-soft);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text-main);
  border: 2px solid var(--border-soft);
  box-shadow: inset 1px 1px 0px rgba(255, 255, 255, 0.05), 0 2px 4px rgba(0,0,0,0.1);
}

.btn-secondary:hover {
  background: var(--surface-muted);
  border-color: rgb(var(--primary-rgb));
  box-shadow: inset 1px 1px 0px rgba(255, 255, 255, 0.1), 0 4px 8px rgba(0,0,0,0.15);
}

.dark .btn-secondary {
  background: var(--surface);
  color: var(--text-main);
  border-color: var(--border-soft);
}

.dark .btn-secondary:hover {
  background: var(--surface-muted);
  border-color: rgb(var(--primary-rgb));
}

/* Roadmap Components */
.roadmap-line {
  background: linear-gradient(to bottom, 
    transparent,
    rgba(var(--primary-rgb), 0.2) 10%,
    rgba(var(--primary-rgb), 0.5) 50%,
    rgba(var(--primary-rgb), 0.2) 90%,
    transparent
  );
  box-shadow: 0 0 20px rgba(var(--primary-rgb), 0.1);
}

.roadmap-dot {
  background: var(--surface);
  border: 4px solid rgba(var(--primary-rgb), 0.3);
  box-shadow: 0 0 15px rgba(var(--primary-rgb), 0.4);
}

.dark .roadmap-dot {
  background: #07111F;
  border-color: rgba(var(--primary-rgb), 0.5);
  box-shadow: 0 0 20px rgba(var(--primary-rgb), 0.6);
}

.roadmap-card-glass {
  background: var(--surface);
  border: 2px solid var(--border-soft);
  box-shadow: var(--shadow-premium);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.roadmap-card-glass:hover {
  border-color: rgb(var(--primary-rgb));
  box-shadow: var(--shadow-premium-lg);
  transform: translateY(-4px);
}