/* =========================================
   ATOMIC LAB - DARK THEME SYSTEM
   ========================================= */

/* =================
   BASE THEME TOKENS
   ================= */
:root {
  /* === Core Spacing System === */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* === Typography Scale === */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* === Font Families === */
  --font-primary: 'Orbitron', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  
  /* === Font Weights === */
  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-black: 900;
  
  /* === Border Radius === */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* === Shadows === */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(var(--glow-rgb), 0.5);
  
  /* === Animation Durations === */
  --duration-instant: 100ms;
  --duration-fast: 200ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 800ms;
  
  /* === Animation Curves === */
  --ease-linear: linear;
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* === Z-Index Scale === */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-notification: 800;
  --z-maximum: 999;
  
  /* === Responsive Breakpoints === */
  --breakpoint-xs: 320px;
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
  
  /* === Container Max Widths === */
  --container-xs: 100%;
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
  
  /* === Grid System === */
  --grid-columns: 12;
  --grid-gap-xs: var(--space-xs);
  --grid-gap-sm: var(--space-sm);
  --grid-gap-md: var(--space-md);
  --grid-gap-lg: var(--space-lg);
  --grid-gap-xl: var(--space-xl);
}

/* ========================
   DARK THEME (DEFAULT)
   ======================== */
:root {
  /* === Core Colors === */
  --color-bg-primary: #0A0A0F;
  --color-bg-secondary: #0F1419;
  --color-bg-tertiary: #1A1D24;
  --color-bg-elevated: #2A2E38;
  --color-bg-overlay: rgba(10, 10, 15, 0.95);
  
  /* === Surface Colors === */
  --color-surface-primary: #1A1D24;
  --color-surface-secondary: #2A2E38;
  --color-surface-tertiary: #373C47;
  --color-surface-hover: rgba(0, 212, 255, 0.1);
  --color-surface-active: rgba(0, 212, 255, 0.2);
  
  /* === Text Colors === */
  --color-text-primary: #E0E6ED;
  --color-text-secondary: #8892A0;
  --color-text-tertiary: #6B7280;
  --color-text-disabled: #4B5563;
  --color-text-inverse: #0A0A0F;
  --color-text-on-brand: #0A0A0F; /* Dark text for bright brand backgrounds */
  
  /* === Brand Colors === */
  --color-brand-primary: #00D4FF;
  --color-brand-secondary: #BD00FF;
  --color-brand-tertiary: #00FF88;
  --color-brand-accent: #FF6B00;
  
  /* === Semantic Colors === */
  --color-success: #00FF88;
  --color-success-hover: #00E676;
  --color-success-bg: rgba(0, 255, 136, 0.1);
  
  --color-warning: #FF6B00;
  --color-warning-hover: #FF8F00;
  --color-warning-bg: rgba(255, 107, 0, 0.1);
  
  --color-error: #FF1744;
  --color-error-hover: #FF5252;
  --color-error-bg: rgba(255, 23, 68, 0.1);
  
  --color-info: #00D4FF;
  --color-info-hover: #00B8E6;
  --color-info-bg: rgba(0, 212, 255, 0.1);
  
  /* === Element Category Colors === */
  --color-alkali: #FF1744;
  --color-alkaline: #FF6B00;
  --color-transition: #00BCD4;
  --color-metalloid: #8BC34A;
  --color-nonmetal: #FFD700;
  --color-halogen: #00E676;
  --color-noble: #E040FB;
  --color-lanthanide: #FF4081;
  --color-actinide: #536DFE;
  --color-post-transition: #40C4FF;
  --color-unknown: #9E9E9E;
  
  /* === Border Colors === */
  --color-border-primary: rgba(0, 212, 255, 0.3);
  --color-border-secondary: rgba(255, 255, 255, 0.1);
  --color-border-tertiary: rgba(255, 255, 255, 0.05);
  
  /* === Glow Effects === */
  --glow-rgb: 0, 212, 255;
  --glow-intensity: 0.5;
  --glow-spread: 20px;
  
  /* === Gradients === */
  --gradient-brand: linear-gradient(135deg, var(--color-brand-primary) 0%, var(--color-brand-secondary) 100%);
  --gradient-dark: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
  --gradient-surface: linear-gradient(135deg, var(--color-surface-primary) 0%, var(--color-surface-secondary) 100%);
}






/* =============================
   REDUCED MOTION SUPPORT
   ============================= */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* =============================
   PRINT THEME
   ============================= */
@media print {
  :root {
    --color-bg-primary: #FFFFFF;
    --color-bg-secondary: #FFFFFF;
    --color-text-primary: #000000;
    --color-text-secondary: #333333;
    --color-border-primary: #000000;
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
    --shadow-xl: none;
    --shadow-glow: none;
  }
  
  /* Hide non-essential elements */
  .theme-switcher,
  .nav-molecular,
  .particle-effect,
  .glow-effect,
  .animation-wrapper {
    display: none !important;
  }
  
  /* Ensure readable text */
  * {
    color: var(--color-text-primary) !important;
    background: transparent !important;
  }
  
  /* Add borders for structure */
  .element-card,
  .content-section {
    border: 1px solid var(--color-border-primary) !important;
  }
}


/* =============================
   UTILITY CLASSES
   ============================= */

/* Background utilities */
.bg-primary { background-color: var(--color-bg-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }
.bg-tertiary { background-color: var(--color-bg-tertiary); }
.bg-elevated { background-color: var(--color-bg-elevated); }

/* Text utilities */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-disabled { color: var(--color-text-disabled); }

/* Border utilities */
.border-primary { border-color: var(--color-border-primary); }
.border-secondary { border-color: var(--color-border-secondary); }
.border-tertiary { border-color: var(--color-border-tertiary); }

/* Element category utilities */
.element-alkali { 
  --element-color: var(--color-alkali);
  border-color: var(--element-color);
  color: var(--element-color);
}

.element-alkaline { 
  --element-color: var(--color-alkaline);
  border-color: var(--element-color);
  color: var(--element-color);
}

.element-transition { 
  --element-color: var(--color-transition);
  border-color: var(--element-color);
  color: var(--element-color);
}

.element-metalloid { 
  --element-color: var(--color-metalloid);
  border-color: var(--element-color);
  color: var(--element-color);
}

.element-nonmetal { 
  --element-color: var(--color-nonmetal);
  border-color: var(--element-color);
  color: var(--element-color);
}

.element-halogen { 
  --element-color: var(--color-halogen);
  border-color: var(--element-color);
  color: var(--element-color);
}

.element-noble { 
  --element-color: var(--color-noble);
  border-color: var(--element-color);
  color: var(--element-color);
}

.element-lanthanide { 
  --element-color: var(--color-lanthanide);
  border-color: var(--element-color);
  color: var(--element-color);
}

.element-actinide { 
  --element-color: var(--color-actinide);
  border-color: var(--element-color);
  color: var(--element-color);
}

.element-post-transition { 
  --element-color: var(--color-post-transition);
  border-color: var(--element-color);
  color: var(--element-color);
}

/* =============================
   DARK THEME EFFECTS
   ============================= */

/* Glow effects */
.glow-effect {
  filter: drop-shadow(0 0 var(--glow-spread) rgba(var(--glow-rgb), var(--glow-intensity)));
}

/* Neon text effects */
.neon-text {
  text-shadow: 
    0 0 10px currentColor,
    0 0 20px currentColor,
    0 0 30px currentColor;
}

/* =============================
   RESPONSIVE UTILITIES
   ============================= */

/* Container */
.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

@media (min-width: 640px) {
  .container {
    max-width: var(--container-sm);
  }
}

@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: var(--container-lg);
  }
}

@media (min-width: 1280px) {
  .container {
    max-width: var(--container-xl);
    padding-left: var(--space-xl);
    padding-right: var(--space-xl);
  }
}

@media (min-width: 1536px) {
  .container {
    max-width: var(--container-2xl);
  }
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--grid-gap-md);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

/* Responsive Grid */
@media (min-width: 640px) {
  .sm\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .sm\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .sm\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .md\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .md\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .lg\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .lg\:grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
}

/* Responsive Display */
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

@media (min-width: 640px) {
  .sm\:hidden { display: none; }
  .sm\:block { display: block; }
  .sm\:inline-block { display: inline-block; }
  .sm\:flex { display: flex; }
  .sm\:grid { display: grid; }
}

@media (min-width: 768px) {
  .md\:hidden { display: none; }
  .md\:block { display: block; }
  .md\:inline-block { display: inline-block; }
  .md\:flex { display: flex; }
  .md\:grid { display: grid; }
}

@media (min-width: 1024px) {
  .lg\:hidden { display: none; }
  .lg\:block { display: block; }
  .lg\:inline-block { display: inline-block; }
  .lg\:flex { display: flex; }
  .lg\:grid { display: grid; }
}

/* Responsive Text */
@media (min-width: 640px) {
  .sm\:text-xs { font-size: var(--font-size-xs); }
  .sm\:text-sm { font-size: var(--font-size-sm); }
  .sm\:text-base { font-size: var(--font-size-base); }
  .sm\:text-lg { font-size: var(--font-size-lg); }
  .sm\:text-xl { font-size: var(--font-size-xl); }
}

@media (min-width: 768px) {
  .md\:text-xs { font-size: var(--font-size-xs); }
  .md\:text-sm { font-size: var(--font-size-sm); }
  .md\:text-base { font-size: var(--font-size-base); }
  .md\:text-lg { font-size: var(--font-size-lg); }
  .md\:text-xl { font-size: var(--font-size-xl); }
  .md\:text-2xl { font-size: var(--font-size-2xl); }
  .md\:text-3xl { font-size: var(--font-size-3xl); }
}

@media (min-width: 1024px) {
  .lg\:text-base { font-size: var(--font-size-base); }
  .lg\:text-lg { font-size: var(--font-size-lg); }
  .lg\:text-xl { font-size: var(--font-size-xl); }
  .lg\:text-2xl { font-size: var(--font-size-2xl); }
  .lg\:text-3xl { font-size: var(--font-size-3xl); }
  .lg\:text-4xl { font-size: var(--font-size-4xl); }
  .lg\:text-5xl { font-size: var(--font-size-5xl); }
}