/**
 * Ultracold design tokens
 *
 * Breakpoint reference (custom properties cannot be used in media queries):
 * xs  30rem / 480px
 * md  48rem / 768px
 * lg  64rem / 1024px
 * xl  80rem / 1280px
 * 2xl 90rem / 1440px
 */

:root {
  color-scheme: light;

  /* Brand and cold industrial palette */
  --uc-color-navy-950: #06141f;
  --uc-color-navy-900: #0a2235;
  --uc-color-navy-800: #103a57;
  --uc-color-navy-700: #155374;
  --uc-color-blue-700: #005d8f;
  --uc-color-blue-600: #0075a9;
  --uc-color-blue-500: #1597c4;
  --uc-color-blue-300: #79cbe6;
  --uc-color-blue-100: #dff3fa;
  --uc-color-blue-50: #eff9fc;

  /* Neutral palette */
  --uc-color-white: #ffffff;
  --uc-color-ice-50: #f6f9fb;
  --uc-color-slate-100: #eaf0f4;
  --uc-color-slate-200: #cedae2;
  --uc-color-slate-300: #aebfca;
  --uc-color-slate-500: #526575;
  --uc-color-slate-700: #2d4353;
  --uc-color-slate-800: #203543;
  --uc-color-slate-900: #142733;

  /* Semantic palette. Each foreground meets WCAG AA on its paired surface. */
  --uc-color-success: #0f6d44;
  --uc-color-success-surface: #e5f6ed;
  --uc-color-warning: #684600;
  --uc-color-warning-surface: #fff4cf;
  --uc-color-danger: #a5262b;
  --uc-color-danger-surface: #fcebed;
  --uc-color-info: #075e88;
  --uc-color-info-surface: #e3f4fa;
  --uc-color-whatsapp: #087a42;
  --uc-color-whatsapp-hover: #056534;

  /* Role aliases */
  --uc-color-brand: var(--uc-color-navy-800);
  --uc-color-brand-strong: var(--uc-color-navy-900);
  --uc-color-accent: var(--uc-color-blue-700);
  --uc-color-accent-hover: #004c77;
  --uc-color-text: var(--uc-color-slate-900);
  --uc-color-text-muted: var(--uc-color-slate-500);
  --uc-color-text-inverse: var(--uc-color-white);
  --uc-color-surface: var(--uc-color-white);
  --uc-color-surface-subtle: var(--uc-color-ice-50);
  --uc-color-surface-cold: var(--uc-color-blue-50);
  --uc-color-surface-dark: var(--uc-color-navy-900);
  --uc-color-border: var(--uc-color-slate-200);
  --uc-color-border-strong: #728694;
  --uc-color-link: var(--uc-color-blue-700);
  --uc-color-link-hover: var(--uc-color-accent-hover);
  --uc-color-focus: #0075a9;
  --uc-color-disabled-surface: #dbe4e9;
  --uc-color-disabled-text: var(--uc-color-slate-500);

  /* System-first and ready for a future self-hosted "Inter" face. */
  --uc-font-family-sans:
    "Inter", "Segoe UI", Roboto, Helvetica, Arial, system-ui, -apple-system,
    BlinkMacSystemFont, sans-serif;
  --uc-font-family-display: var(--uc-font-family-sans);
  --uc-font-family-mono:
    "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --uc-font-size-xs: 0.75rem;
  --uc-font-size-sm: 0.875rem;
  --uc-font-size-base: 1rem;
  --uc-font-size-lg: 1.125rem;
  --uc-font-size-xl: 1.25rem;
  --uc-font-size-2xl: clamp(1.5rem, 1.3rem + 0.8vw, 2rem);
  --uc-font-size-3xl: clamp(1.875rem, 1.5rem + 1.4vw, 2.75rem);
  --uc-font-size-4xl: clamp(2.25rem, 1.7rem + 2.2vw, 3.75rem);
  --uc-font-weight-regular: 400;
  --uc-font-weight-medium: 500;
  --uc-font-weight-semibold: 600;
  --uc-font-weight-bold: 700;
  --uc-line-height-tight: 1.15;
  --uc-line-height-heading: 1.25;
  --uc-line-height-base: 1.65;
  --uc-letter-spacing-tight: -0.02em;
  --uc-letter-spacing-wide: 0.08em;

  /* Four-pixel spacing scale */
  --uc-space-0: 0;
  --uc-space-1: 0.25rem;
  --uc-space-2: 0.5rem;
  --uc-space-3: 0.75rem;
  --uc-space-4: 1rem;
  --uc-space-5: 1.25rem;
  --uc-space-6: 1.5rem;
  --uc-space-8: 2rem;
  --uc-space-10: 2.5rem;
  --uc-space-12: 3rem;
  --uc-space-16: 4rem;
  --uc-space-20: 5rem;
  --uc-space-24: 6rem;
  --uc-space-28: 7rem;
  --uc-space-section: clamp(3.5rem, 7vw, 7rem);
  --uc-space-gutter: clamp(1rem, 4vw, 2rem);

  /* Shape */
  --uc-border-width: 1px;
  --uc-border-width-strong: 2px;
  --uc-radius-xs: 0.25rem;
  --uc-radius-sm: 0.5rem;
  --uc-radius-md: 0.75rem;
  --uc-radius-lg: 1rem;
  --uc-radius-pill: 999px;

  /* Shadows remain restrained to avoid a generic floating-card aesthetic. */
  --uc-shadow-xs: 0 1px 2px rgb(6 20 31 / 0.08);
  --uc-shadow-sm: 0 5px 16px rgb(6 20 31 / 0.08);
  --uc-shadow-md: 0 12px 30px rgb(6 20 31 / 0.12);
  --uc-shadow-focus:
    0 0 0 3px var(--uc-color-surface),
    0 0 0 6px var(--uc-color-focus);

  /* Layout */
  --uc-width-content: 46rem;
  --uc-width-container: 74rem;
  --uc-width-container-wide: 82rem;
  --uc-width-reading: 42rem;
  --uc-header-height: 4.5rem;
  --uc-touch-target: 2.75rem;

  /* Breakpoints are documentation tokens; use their literal values in @media. */
  --uc-breakpoint-xs: 30rem;
  --uc-breakpoint-md: 48rem;
  --uc-breakpoint-lg: 64rem;
  --uc-breakpoint-xl: 80rem;
  --uc-breakpoint-2xl: 90rem;

  /* Motion */
  --uc-duration-fast: 120ms;
  --uc-duration-base: 220ms;
  --uc-duration-slow: 360ms;
  --uc-ease-standard: cubic-bezier(0.2, 0, 0, 1);

  /* Stacking order */
  --uc-z-base: 0;
  --uc-z-raised: 10;
  --uc-z-dropdown: 200;
  --uc-z-sticky: 400;
  --uc-z-overlay: 700;
  --uc-z-drawer: 800;
  --uc-z-modal: 900;
  --uc-z-toast: 1000;
}

@media (prefers-contrast: more) {
  :root {
    --uc-color-border: var(--uc-color-slate-500);
    --uc-color-text-muted: var(--uc-color-slate-700);
  }
}