/* === HTCTheme CSS Variables === */
:root {
  /* === Brand Colors === */
  --color-primary: #2563EB;
  --color-primary-dark: #1D4ED8;
  --color-primary-darker: #1E40AF;
  --color-primary-light: #3B82F6;
  --color-primary-lighter: #60A5FA;
  --color-primary-bg: #EFF6FF;
  --color-primary-bg-light: #DBEAFE;

  --color-navy: #0F172A;
  --color-navy-mid: #1E293B;
  --color-navy-light: #334155;

  --color-white: #FFFFFF;
  --color-bg: #FFFFFF;
  --color-bg-light: #F8FAFC;
  --color-bg-lighter: #F1F5F9;
  --color-bg-blue: #EFF6FF;

  --color-text: #1E293B;
  --color-text-secondary: #475569;
  --color-text-light: #64748B;
  --color-text-lighter: #94A3B8;

  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;

  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;

  /* === Typography === */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  --weight-light: 300;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.6;
  --leading-loose: 1.8;

  /* === Spacing Scale === */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-14: 3.5rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* === Layout === */
  --container-max: 1280px;
  --container-padding: 2.5rem;
  --section-padding: 6rem;
  --section-padding-sm: 4rem;

  /* === Borders === */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* === Shadows === */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 2px 8px rgba(37, 99, 235, 0.08), 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-card-hover: 0 10px 30px rgba(37, 99, 235, 0.15), 0 4px 10px rgba(0, 0, 0, 0.08);

  /* === Transitions === */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  --transition-ease: cubic-bezier(0.4, 0, 0.2, 1);

  /* === Z-index === */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;

  /* === Header === */
  --header-height: 80px;
  --header-bg: rgba(255, 255, 255, 0.98);
  --header-border: rgba(226, 232, 240, 0.8);
}