/**
 * Nucleora Design Tokens
 * CSS Custom Properties for the CAD-style interface
 * Dark theme as default - inspired by Figma/Fusion360
 */

:root {
  /* ============================================
     COLOR SYSTEM
     ============================================ */
  
  /* Primary Brand Colors */
  --nucleora-primary: #6366f1;
  --nucleora-primary-hover: #818cf8;
  --nucleora-primary-active: #4f46e5;
  --nucleora-primary-muted: rgba(99, 102, 241, 0.15);
  --nucleora-primary-subtle: rgba(99, 102, 241, 0.08);
  
  /* Secondary Colors */
  --nucleora-secondary: #8b5cf6;
  --nucleora-secondary-hover: #a78bfa;
  --nucleora-secondary-active: #7c3aed;
  
  /* Accent Colors - DNA/Biotech Theme */
  --nucleora-accent-cyan: #22d3ee;
  --nucleora-accent-teal: #14b8a6;
  --nucleora-accent-emerald: #10b981;
  --nucleora-accent-amber: #f59e0b;
  --nucleora-accent-rose: #f43f5e;
  
  /* Background Colors - Dark Theme */
  --nucleora-bg-darkest: #09090b;
  --nucleora-bg-darker: #0c0c0f;
  --nucleora-bg-dark: #121218;
  --nucleora-bg-base: #18181b;
  --nucleora-bg-elevated: #1f1f23;
  --nucleora-bg-surface: #27272a;
  --nucleora-bg-overlay: #2d2d32;
  --nucleora-bg-hover: #3f3f46;
  --nucleora-bg-active: #52525b;
  
  /* Surface Colors */
  --nucleora-surface-1: #1c1c21;
  --nucleora-surface-2: #232329;
  --nucleora-surface-3: #2a2a31;
  --nucleora-surface-4: #323239;
  
  /* Border Colors */
  --nucleora-border-subtle: rgba(255, 255, 255, 0.06);
  --nucleora-border-default: rgba(255, 255, 255, 0.1);
  --nucleora-border-strong: rgba(255, 255, 255, 0.15);
  --nucleora-border-focus: var(--nucleora-primary);
  --nucleora-border-error: #ef4444;
  --nucleora-border-success: #22c55e;
  
  /* Text Colors */
  --nucleora-text-primary: #fafafa;
  --nucleora-text-secondary: #a1a1aa;
  --nucleora-text-tertiary: #71717a;
  --nucleora-text-muted: #52525b;
  --nucleora-text-disabled: #3f3f46;
  --nucleora-text-inverse: #09090b;
  --nucleora-text-link: var(--nucleora-primary-hover);
  --nucleora-text-link-hover: var(--nucleora-primary);
  
  /* Status Colors */
  --nucleora-success: #22c55e;
  --nucleora-success-bg: rgba(34, 197, 94, 0.12);
  --nucleora-success-border: rgba(34, 197, 94, 0.3);
  
  --nucleora-warning: #f59e0b;
  --nucleora-warning-bg: rgba(245, 158, 11, 0.12);
  --nucleora-warning-border: rgba(245, 158, 11, 0.3);
  
  --nucleora-error: #ef4444;
  --nucleora-error-bg: rgba(239, 68, 68, 0.12);
  --nucleora-error-border: rgba(239, 68, 68, 0.3);
  
  --nucleora-info: #3b82f6;
  --nucleora-info-bg: rgba(59, 130, 246, 0.12);
  --nucleora-info-border: rgba(59, 130, 246, 0.3);
  
  /* DNA Sequence Colors */
  --nucleora-base-a: #22c55e;  /* Adenine - Green */
  --nucleora-base-t: #ef4444;  /* Thymine - Red */
  --nucleora-base-g: #f59e0b;  /* Guanine - Yellow */
  --nucleora-base-c: #3b82f6;  /* Cytosine - Blue */
  --nucleora-base-u: #a855f7;  /* Uracil - Purple (RNA) */
  
  /* Codon Highlight Colors */
  --nucleora-codon-start: #22d3ee;
  --nucleora-codon-stop: #f43f5e;
  --nucleora-codon-highlight: rgba(99, 102, 241, 0.25);
  
  /* ============================================
     TYPOGRAPHY SCALE
     ============================================ */
  
  /* Font Families */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, 'Liberation Mono', monospace;
  --font-display: 'Inter', var(--font-sans);
  
  /* Font Sizes */
  --font-2xs: 0.625rem;   /* 10px */
  --font-xs: 0.75rem;     /* 12px */
  --font-sm: 0.8125rem;   /* 13px */
  --font-base: 0.875rem;  /* 14px - Default for CAD interfaces */
  --font-md: 1rem;        /* 16px */
  --font-lg: 1.125rem;    /* 18px */
  --font-xl: 1.25rem;     /* 20px */
  --font-2xl: 1.5rem;     /* 24px */
  --font-3xl: 1.875rem;   /* 30px */
  --font-4xl: 2.25rem;    /* 36px */
  --font-5xl: 3rem;       /* 48px */
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;
  
  /* Font Weights */
  --font-thin: 100;
  --font-extralight: 200;
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  
  /* ============================================
     SPACING SCALE
     ============================================ */
  
  --space-px: 1px;
  --space-0: 0;
  --space-0-5: 0.125rem;  /* 2px */
  --space-1: 0.25rem;     /* 4px */
  --space-1-5: 0.375rem;  /* 6px */
  --space-2: 0.5rem;      /* 8px */
  --space-2-5: 0.625rem;  /* 10px */
  --space-3: 0.75rem;     /* 12px */
  --space-3-5: 0.875rem;  /* 14px */
  --space-4: 1rem;        /* 16px */
  --space-5: 1.25rem;     /* 20px */
  --space-6: 1.5rem;      /* 24px */
  --space-7: 1.75rem;     /* 28px */
  --space-8: 2rem;        /* 32px */
  --space-9: 2.25rem;     /* 36px */
  --space-10: 2.5rem;     /* 40px */
  --space-11: 2.75rem;    /* 44px */
  --space-12: 3rem;       /* 48px */
  --space-14: 3.5rem;     /* 56px */
  --space-16: 4rem;       /* 64px */
  --space-20: 5rem;       /* 80px */
  --space-24: 6rem;       /* 96px */
  
  /* ============================================
     SIZING
     ============================================ */
  
  /* Fixed Sizes */
  --size-0: 0;
  --size-1: 0.25rem;
  --size-2: 0.5rem;
  --size-3: 0.75rem;
  --size-4: 1rem;
  --size-5: 1.25rem;
  --size-6: 1.5rem;
  --size-8: 2rem;
  --size-10: 2.5rem;
  --size-12: 3rem;
  --size-16: 4rem;
  --size-20: 5rem;
  --size-24: 6rem;
  --size-32: 8rem;
  --size-40: 10rem;
  --size-48: 12rem;
  --size-56: 14rem;
  --size-64: 16rem;
  
  /* Component Sizes */
  --size-icon-xs: 0.75rem;   /* 12px */
  --size-icon-sm: 1rem;      /* 16px */
  --size-icon-md: 1.25rem;   /* 20px */
  --size-icon-lg: 1.5rem;    /* 24px */
  --size-icon-xl: 2rem;      /* 32px */
  
  /* ============================================
     BORDER RADIUS
     ============================================ */
  
  --radius-none: 0;
  --radius-sm: 0.125rem;    /* 2px */
  --radius-default: 0.25rem; /* 4px */
  --radius-md: 0.375rem;    /* 6px */
  --radius-lg: 0.5rem;      /* 8px */
  --radius-xl: 0.75rem;     /* 12px */
  --radius-2xl: 1rem;       /* 16px */
  --radius-3xl: 1.5rem;     /* 24px */
  --radius-full: 9999px;
  
  /* ============================================
     SHADOWS
     ============================================ */
  
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.5), 0 1px 2px -1px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -2px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.4);
  
  /* Glow Effects */
  --shadow-glow-primary: 0 0 20px rgba(99, 102, 241, 0.3);
  --shadow-glow-success: 0 0 20px rgba(34, 197, 94, 0.3);
  --shadow-glow-error: 0 0 20px rgba(239, 68, 68, 0.3);
  --shadow-glow-cyan: 0 0 20px rgba(34, 211, 238, 0.3);
  
  /* Panel Shadows */
  --shadow-panel: 0 0 0 1px var(--nucleora-border-subtle), var(--shadow-lg);
  --shadow-dropdown: 0 0 0 1px var(--nucleora-border-default), var(--shadow-xl);
  --shadow-modal: 0 0 0 1px var(--nucleora-border-default), var(--shadow-2xl);
  
  /* ============================================
     TRANSITIONS
     ============================================ */
  
  /* Durations */
  --duration-instant: 0ms;
  --duration-fast: 75ms;
  --duration-normal: 150ms;
  --duration-moderate: 200ms;
  --duration-slow: 300ms;
  --duration-slower: 500ms;
  --duration-slowest: 700ms;
  
  /* Timing Functions */
  --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);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  
  /* Common Transitions */
  --transition-colors: color var(--duration-normal) var(--ease-out),
                       background-color var(--duration-normal) var(--ease-out),
                       border-color var(--duration-normal) var(--ease-out);
  --transition-opacity: opacity var(--duration-normal) var(--ease-out);
  --transition-transform: transform var(--duration-moderate) var(--ease-out);
  --transition-all: all var(--duration-normal) var(--ease-out);
  --transition-shadow: box-shadow var(--duration-normal) var(--ease-out);
  
  /* ============================================
     Z-INDEX SCALE
     ============================================ */
  
  --z-below: -1;
  --z-base: 0;
  --z-raised: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-overlay: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-toast: 800;
  --z-max: 9999;
  
  /* ============================================
     CAD-SPECIFIC TOKENS
     ============================================ */
  
  /* Panel Dimensions */
  --panel-min-width: 200px;
  --panel-default-width: 280px;
  --panel-max-width: 400px;
  --panel-header-height: 32px;
  --panel-collapsed-width: 40px;
  
  /* Toolbar Dimensions */
  --toolbar-height: 40px;
  --toolbar-height-compact: 32px;
  --toolbar-button-size: 32px;
  --toolbar-button-size-compact: 28px;
  --toolbar-gap: 4px;
  
  /* Status Bar */
  --statusbar-height: 24px;
  
  /* Menu Bar */
  --menubar-height: 28px;
  
  /* Canvas */
  --canvas-bg: var(--nucleora-bg-darkest);
  --canvas-grid-color: rgba(255, 255, 255, 0.03);
  --canvas-grid-major-color: rgba(255, 255, 255, 0.06);
  
  /* Ruler */
  --ruler-size: 20px;
  --ruler-bg: var(--nucleora-bg-dark);
  --ruler-text: var(--nucleora-text-tertiary);
  --ruler-tick: var(--nucleora-border-default);
  
  /* Scrollbar */
  --scrollbar-size: 10px;
  --scrollbar-track: transparent;
  --scrollbar-thumb: var(--nucleora-bg-hover);
  --scrollbar-thumb-hover: var(--nucleora-bg-active);
  
  /* Resize Handle */
  --resize-handle-size: 6px;
  --resize-handle-color: var(--nucleora-primary);
  
  /* Selection */
  --selection-bg: rgba(99, 102, 241, 0.2);
  --selection-border: var(--nucleora-primary);
  
  /* Focus Ring */
  --focus-ring-width: 2px;
  --focus-ring-offset: 2px;
  --focus-ring-color: var(--nucleora-primary);
}

/* ============================================
   SCROLLBAR STYLES
   ============================================ */

* {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

*::-webkit-scrollbar {
  width: var(--scrollbar-size);
  height: var(--scrollbar-size);
}

*::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

*::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  background-clip: content-box;
}

*::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
  background-clip: content-box;
}

*::-webkit-scrollbar-corner {
  background: var(--scrollbar-track);
}

/* ============================================
   BASE RESET & DEFAULTS
   ============================================ */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-base);
  line-height: var(--leading-normal);
  color: var(--nucleora-text-primary);
  background-color: var(--nucleora-bg-base);
}

::selection {
  background-color: var(--selection-bg);
  color: var(--nucleora-text-primary);
}

/* Focus visible for accessibility */
:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

:focus:not(:focus-visible) {
  outline: none;
}