/* ============================================
   SENSA DESIGN SYSTEM - DESIGN TOKENS
   Version: 1.0.0
   Last Updated: 2025-11-12
   
   This file contains all design tokens used across
   all Sensa products: app, docs, notes, ai, status
   ============================================ */

:root {
  /* ============================================
     COLORS - Primary Palette
     ============================================ */
  
  /* Base Colors */
  --sensa-white: #ffffff;
  --sensa-black: #000000;
  
  /* Light Mode */
  --sensa-bg-primary: #ffffff;
  --sensa-bg-secondary: #f7f7f7;
  --sensa-bg-tertiary: #f0f0f0;
  --sensa-bg-hover: rgba(0, 0, 0, 0.03);
  
  --sensa-text-primary: #37352f;
  --sensa-text-secondary: #787774;
  --sensa-text-tertiary: #9b9a97;
  --sensa-text-inverse: #ffffff;
  
  --sensa-border-light: rgba(0, 0, 0, 0.08);
  --sensa-border-medium: #e9e9e7;
  --sensa-border-strong: #d3d3d1;
  
  /* Accent Colors */
  --sensa-accent-primary: #2383e2;
  --sensa-accent-secondary: #529cca;
  --sensa-accent-hover: #1a6cbf;
  
  /* Semantic Colors */
  --sensa-success: #4caf50;
  --sensa-success-light: #81c784;
  --sensa-warning: #ff9800;
  --sensa-warning-light: #ffb74d;
  --sensa-error: #ff4444;
  --sensa-error-light: #ff6b6b;
  --sensa-info: #2196f3;
  --sensa-info-light: #64b5f6;
  
  /* Interactive States */
  --sensa-key-bg: rgba(0, 0, 0, 0.02);
  --sensa-key-hover: rgba(0, 0, 0, 0.05);
  --sensa-key-active: rgba(0, 0, 0, 0.08);
  --sensa-focus: #d3e5f5;
  --sensa-selection: rgba(35, 131, 226, 0.2);
  
  /* Overlays */
  --sensa-overlay-light: rgba(0, 0, 0, 0.1);
  --sensa-overlay-medium: rgba(0, 0, 0, 0.3);
  --sensa-overlay-strong: rgba(0, 0, 0, 0.6);
  
  /* Shadows */
  --sensa-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --sensa-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --sensa-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --sensa-shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
  
  /* ============================================
     TYPOGRAPHY
     ============================================ */
  
  /* Font Families */
  --sensa-font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --sensa-font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  --sensa-font-serif: 'Georgia', 'Times New Roman', serif;
  
  /* Font Sizes */
  --sensa-text-xs: 0.75rem;      /* 12px */
  --sensa-text-sm: 0.875rem;     /* 14px */
  --sensa-text-base: 1rem;       /* 16px */
  --sensa-text-lg: 1.125rem;     /* 18px */
  --sensa-text-xl: 1.25rem;      /* 20px */
  --sensa-text-2xl: 1.5rem;      /* 24px */
  --sensa-text-3xl: 1.875rem;    /* 30px */
  --sensa-text-4xl: 2.25rem;     /* 36px */
  --sensa-text-5xl: 3rem;        /* 48px */
  
  /* Font Weights */
  --sensa-weight-light: 300;
  --sensa-weight-normal: 400;
  --sensa-weight-medium: 500;
  --sensa-weight-semibold: 600;
  --sensa-weight-bold: 700;
  
  /* Line Heights */
  --sensa-leading-tight: 1.2;
  --sensa-leading-normal: 1.5;
  --sensa-leading-relaxed: 1.7;
  --sensa-leading-loose: 2;
  
  /* Letter Spacing */
  --sensa-tracking-tight: -0.02em;
  --sensa-tracking-normal: 0;
  --sensa-tracking-wide: 0.02em;
  
  /* ============================================
     SPACING & SIZING
     ============================================ */
  
  /* Spacing Scale (based on 4px) */
  --sensa-space-0: 0;
  --sensa-space-1: 0.25rem;      /* 4px */
  --sensa-space-2: 0.5rem;       /* 8px */
  --sensa-space-3: 0.75rem;      /* 12px */
  --sensa-space-4: 1rem;         /* 16px */
  --sensa-space-5: 1.25rem;      /* 20px */
  --sensa-space-6: 1.5rem;       /* 24px */
  --sensa-space-8: 2rem;         /* 32px */
  --sensa-space-10: 2.5rem;      /* 40px */
  --sensa-space-12: 3rem;        /* 48px */
  --sensa-space-16: 4rem;        /* 64px */
  --sensa-space-20: 5rem;        /* 80px */
  --sensa-space-24: 6rem;        /* 96px */
  
  /* Border Radius */
  --sensa-radius-none: 0;
  --sensa-radius-sm: 0.125rem;   /* 2px */
  --sensa-radius-base: 0.25rem;  /* 4px */
  --sensa-radius-md: 0.375rem;   /* 6px */
  --sensa-radius-lg: 0.5rem;     /* 8px */
  --sensa-radius-xl: 0.75rem;    /* 12px */
  --sensa-radius-2xl: 1rem;      /* 16px */
  --sensa-radius-full: 9999px;
  
  /* Border Width */
  --sensa-border-0: 0;
  --sensa-border-1: 1px;
  --sensa-border-2: 2px;
  --sensa-border-4: 4px;
  
  /* ============================================
     TRANSITIONS & ANIMATIONS
     ============================================ */
  
  /* Transition Durations */
  --sensa-duration-fast: 0.1s;
  --sensa-duration-normal: 0.15s;
  --sensa-duration-slow: 0.3s;
  --sensa-duration-slower: 0.5s;
  
  /* Transition Timings */
  --sensa-ease-in: cubic-bezier(0.4, 0, 1, 1);
  --sensa-ease-out: cubic-bezier(0, 0, 0.2, 1);
  --sensa-ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --sensa-ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Default Transition */
  --sensa-transition: all var(--sensa-duration-normal) var(--sensa-ease-in-out);
  
  /* ============================================
     Z-INDEX SCALE
     ============================================ */
  
  --sensa-z-base: 0;
  --sensa-z-dropdown: 1000;
  --sensa-z-sticky: 1100;
  --sensa-z-fixed: 1200;
  --sensa-z-modal-backdrop: 1300;
  --sensa-z-modal: 1400;
  --sensa-z-popover: 1500;
  --sensa-z-tooltip: 1600;
  --sensa-z-notification: 1700;
  
  /* ============================================
     BREAKPOINTS
     ============================================ */
  
  --sensa-breakpoint-xs: 320px;
  --sensa-breakpoint-sm: 640px;
  --sensa-breakpoint-md: 768px;
  --sensa-breakpoint-lg: 1024px;
  --sensa-breakpoint-xl: 1280px;
  --sensa-breakpoint-2xl: 1536px;
  
  /* ============================================
     COMPONENT-SPECIFIC TOKENS
     ============================================ */
  
  /* Buttons */
  --sensa-button-padding-sm: var(--sensa-space-2) var(--sensa-space-4);
  --sensa-button-padding-md: var(--sensa-space-3) var(--sensa-space-6);
  --sensa-button-padding-lg: var(--sensa-space-4) var(--sensa-space-8);
  
  /* Input Fields */
  --sensa-input-height-sm: 32px;
  --sensa-input-height-md: 40px;
  --sensa-input-height-lg: 48px;
  
  /* Cards */
  --sensa-card-padding: var(--sensa-space-6);
  --sensa-card-radius: var(--sensa-radius-xl);
  
  /* Modals */
  --sensa-modal-width-sm: 400px;
  --sensa-modal-width-md: 600px;
  --sensa-modal-width-lg: 800px;
  --sensa-modal-width-xl: 1000px;
  
  /* Keypad (app.sensa.co specific) */
  --sensa-keypad-size: 300px;
  --sensa-keypad-gap: 12px;
  --sensa-key-radius: var(--sensa-radius-xl);
}

/* ============================================
   DARK MODE OVERRIDES
   ============================================ */

@media (prefers-color-scheme: dark) {
  :root {
    /* Backgrounds */
    --sensa-bg-primary: #000000;
    --sensa-bg-secondary: #191919;
    --sensa-bg-tertiary: #2d2d2d;
    --sensa-bg-hover: rgba(255, 255, 255, 0.03);
    
    /* Text */
    --sensa-text-primary: #e3e2e0;
    --sensa-text-secondary: #9b9a97;
    --sensa-text-tertiary: #787774;
    --sensa-text-inverse: #000000;
    
    /* Borders */
    --sensa-border-light: rgba(255, 255, 255, 0.08);
    --sensa-border-medium: #373737;
    --sensa-border-strong: #4a4a4a;
    
    /* Accent Colors */
    --sensa-accent-primary: #529cca;
    --sensa-accent-secondary: #6bb0d9;
    --sensa-accent-hover: #3d8ab8;
    
    /* Interactive States */
    --sensa-key-bg: rgba(255, 255, 255, 0.02);
    --sensa-key-hover: rgba(255, 255, 255, 0.05);
    --sensa-key-active: rgba(255, 255, 255, 0.08);
    --sensa-focus: #37352f;
    --sensa-selection: rgba(82, 156, 202, 0.3);
    
    /* Overlays */
    --sensa-overlay-light: rgba(255, 255, 255, 0.1);
    --sensa-overlay-medium: rgba(255, 255, 255, 0.3);
    --sensa-overlay-strong: rgba(255, 255, 255, 0.6);
    
    /* Shadows (darker for dark mode) */
    --sensa-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.5);
    --sensa-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.6);
    --sensa-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.7);
    --sensa-shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.8);
  }
}

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

/* These classes can be used across all Sensa products */

.sensa-text-primary { color: var(--sensa-text-primary); }
.sensa-text-secondary { color: var(--sensa-text-secondary); }
.sensa-text-tertiary { color: var(--sensa-text-tertiary); }

.sensa-bg-primary { background-color: var(--sensa-bg-primary); }
.sensa-bg-secondary { background-color: var(--sensa-bg-secondary); }
.sensa-bg-tertiary { background-color: var(--sensa-bg-tertiary); }

.sensa-border { border: var(--sensa-border-1) solid var(--sensa-border-medium); }
.sensa-border-light { border: var(--sensa-border-1) solid var(--sensa-border-light); }

.sensa-rounded-sm { border-radius: var(--sensa-radius-sm); }
.sensa-rounded { border-radius: var(--sensa-radius-base); }
.sensa-rounded-md { border-radius: var(--sensa-radius-md); }
.sensa-rounded-lg { border-radius: var(--sensa-radius-lg); }
.sensa-rounded-xl { border-radius: var(--sensa-radius-xl); }
.sensa-rounded-full { border-radius: var(--sensa-radius-full); }

.sensa-shadow-sm { box-shadow: var(--sensa-shadow-sm); }
.sensa-shadow { box-shadow: var(--sensa-shadow-md); }
.sensa-shadow-lg { box-shadow: var(--sensa-shadow-lg); }
.sensa-shadow-xl { box-shadow: var(--sensa-shadow-xl); }

.sensa-transition { transition: var(--sensa-transition); }