/**
 * TranslateConnect Pro - Dynamic Responsive Variables
 * This file contains fluid, viewport-based CSS custom properties
 * that automatically scale across all device resolutions
 */

:root {
  /* ========================================
     DYNAMIC FONT SCALING
     Uses clamp() for smooth scaling between min and max values
     ======================================== */
  
  /* Base Typography */
  --fs-base: clamp(14px, 2.5vw, 16px);
  --fs-small: clamp(12px, 2vw, 14px);
  --fs-xs: clamp(10px, 1.8vw, 12px);
  --fs-large: clamp(18px, 3vw, 24px);
  --fs-xl: clamp(20px, 3.5vw, 28px);
  
  /* Heading Sizes - Fluid scaling */
  --fs-h1: clamp(24px, 5vw, 48px);
  --fs-h2: clamp(20px, 4vw, 36px);
  --fs-h3: clamp(18px, 3.5vw, 28px);
  --fs-h4: clamp(16px, 3vw, 24px);
  --fs-h5: clamp(14px, 2.5vw, 20px);
  --fs-h6: clamp(12px, 2vw, 18px);
  
  /* Navigation Specific */
  --fs-nav: clamp(13px, 2.8vw, 16px);
  --fs-nav-mobile: clamp(11px, 2.5vw, 14px);
  
  /* Button Text */
  --fs-button: clamp(14px, 2.5vw, 16px);
  --fs-button-small: clamp(12px, 2.2vw, 14px);
  
  /* ========================================
     DYNAMIC SPACING SYSTEM
     Proportional spacing that scales with viewport
     ======================================== */
  
  /* Base Spacing Units */
  --spacing-xxs: clamp(0.125rem, 0.5vw, 0.25rem);
  --spacing-xs: clamp(0.25rem, 1vw, 0.5rem);
  --spacing-sm: clamp(0.5rem, 2vw, 1rem);
  --spacing-md: clamp(1rem, 3vw, 1.5rem);
  --spacing-lg: clamp(1.5rem, 4vw, 2rem);
  --spacing-xl: clamp(2rem, 5vw, 3rem);
  --spacing-xxl: clamp(3rem, 6vw, 4rem);
  
  /* Component Spacing */
  --padding-card: clamp(0.75rem, 3vw, 1.5rem);
  --padding-section: clamp(1.5rem, 4vw, 3rem);
  --gap-grid: clamp(0.5rem, 2vw, 1.5rem);
  --gap-flex: clamp(0.25rem, 1.5vw, 1rem);
  
  /* ========================================
     CONTAINER & LAYOUT WIDTHS
     Responsive containers with max limits
     ======================================== */
  
  --container-max: 1200px;
  --container-width: min(100% - 2rem, var(--container-max));
  --content-width: min(100% - 1rem, 800px);
  --article-width: min(100% - 1.5rem, 720px);
  
  /* Fluid Padding for Containers */
  --container-padding-x: clamp(0.75rem, 3vw, 2rem);
  --container-padding-y: clamp(1rem, 4vw, 2rem);
  
  /* ========================================
     TOUCH TARGETS & INTERACTIVE ELEMENTS
     Ensures accessibility on all devices
     ======================================== */
  
  --touch-min: max(44px, 10vw);
  --button-height: clamp(38px, 11vw, 48px);
  --button-padding-x: clamp(0.75rem, 3vw, 1.5rem);
  --button-padding-y: clamp(0.5rem, 2vw, 0.75rem);
  --input-height: clamp(40px, 12vw, 48px);
  --nav-height: clamp(50px, 15vw, 64px);
  
  /* ========================================
     DYNAMIC BORDER RADIUS
     Scales with screen size for consistency
     ======================================== */
  
  --radius-xs: clamp(2px, 0.5vw, 4px);
  --radius-sm: clamp(4px, 1vw, 6px);
  --radius-md: clamp(6px, 1.5vw, 8px);
  --radius-lg: clamp(8px, 2vw, 12px);
  --radius-xl: clamp(12px, 2.5vw, 16px);
  --radius-full: 9999px;
  
  /* ========================================
     VIEWPORT CALCULATIONS
     For complex responsive calculations
     ======================================== */
  
  --vw-scale: calc(100vw / 375); /* Base iPhone width */
  --vh-scale: calc(100vh / 667); /* Base iPhone height */
  --dynamic-scale: min(var(--vw-scale), 1.5);
  
  /* ========================================
     LINE HEIGHT & TEXT METRICS
     Dynamic line heights for readability
     ======================================== */
  
  --lh-tight: 1.25;
  --lh-normal: calc(1em + 0.5rem);
  --lh-relaxed: calc(1em + 0.75rem);
  --lh-loose: calc(1em + 1rem);
  
  /* ========================================
     Z-INDEX SCALE
     Consistent layering system
     ======================================== */
  
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-popover: 500;
  --z-tooltip: 600;
  --z-notification: 700;
  --z-max: 9999;
  
  /* ========================================
     COLOR RGB VALUES
     For rgba() usage in modern UI
     ======================================== */
  
  --color-primary-rgb: 102, 126, 234;
  --color-error-rgb: 239, 68, 68;
  --color-success-rgb: 16, 185, 129;
  --color-warning-rgb: 245, 158, 11;
}

/* ========================================
   ORIENTATION-SPECIFIC ADJUSTMENTS
   ======================================== */

@media (orientation: landscape) {
  :root {
    /* Reduce vertical spacing in landscape */
    --fs-base: clamp(12px, 2vh, 16px);
    --fs-h1: clamp(20px, 4vh, 40px);
    --fs-h2: clamp(18px, 3.5vh, 32px);
    --spacing-md: clamp(0.5rem, 2vh, 1rem);
    --spacing-lg: clamp(0.75rem, 3vh, 1.5rem);
    --nav-height: clamp(40px, 10vh, 56px);
  }
}

/* ========================================
   SMALL PHONE ADJUSTMENTS (< 360px)
   ======================================== */

@media (max-width: 359px) {
  :root {
    /* More aggressive scaling for very small screens */
    --fs-base: clamp(13px, 3vw, 15px);
    --fs-h1: clamp(20px, 6vw, 40px);
    --container-padding-x: clamp(0.5rem, 2vw, 1rem);
    --button-height: max(40px, 12vw);
  }
}

/* ========================================
   LARGE PHONE ADJUSTMENTS (> 428px)
   ======================================== */

@media (min-width: 428px) {
  :root {
    /* Less aggressive scaling for larger phones */
    --fs-base: clamp(15px, 2vw, 16px);
    --fs-h1: clamp(28px, 4vw, 48px);
    --container-padding-x: clamp(1rem, 2.5vw, 2rem);
  }
}

/* ========================================
   TABLET ADJUSTMENTS (> 768px)
   ======================================== */

@media (min-width: 768px) {
  :root {
    /* Stabilize at larger sizes */
    --fs-base: 16px;
    --fs-h1: clamp(36px, 3vw, 48px);
    --fs-h2: clamp(28px, 2.5vw, 36px);
    --container-padding-x: 2rem;
    --button-height: 48px;
    --nav-height: 64px;
  }
}

/* ========================================
   HIGH DPI SCREEN ADJUSTMENTS
   ======================================== */

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  :root {
    /* Sharper rendering on retina displays */
    --border-width: 0.5px;
  }
}

/* ========================================
   ACCESSIBILITY - REDUCED MOTION
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-speed: 0.01ms;
    --animation-speed: 0.01ms;
  }
}

/* ========================================
   ACCESSIBILITY - HIGH CONTRAST
   ======================================== */

@media (prefers-contrast: high) {
  :root {
    --border-width: 2px;
    --focus-outline-width: 3px;
  }
}

/* ========================================
   SAFE AREA SUPPORT (iPhone X+, Android 9+)
   ======================================== */

@supports (padding: max(0px)) {
  :root {
    --safe-area-top: env(safe-area-inset-top);
    --safe-area-right: env(safe-area-inset-right);
    --safe-area-bottom: env(safe-area-inset-bottom);
    --safe-area-left: env(safe-area-inset-left);
    
    /* Adjusted padding with safe areas */
    --container-padding-left: max(var(--container-padding-x), var(--safe-area-left));
    --container-padding-right: max(var(--container-padding-x), var(--safe-area-right));
    --container-padding-bottom: max(var(--container-padding-y), var(--safe-area-bottom));
  }
}

/* ========================================
   UTILITY CLASSES USING VARIABLES
   ======================================== */

.container {
  width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-padding-x);
}

.text-responsive {
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
}

.spacing-responsive {
  padding: var(--spacing-md);
  margin: var(--spacing-sm);
  gap: var(--gap-flex);
}

.touch-target {
  min-height: var(--touch-min);
  min-width: var(--touch-min);
}