/**
 * Design tokens — Esterly Link Landscapes
 * Single source of truth for theme values (custom properties only).
 */

:root {
  /* --- Color: brand & surfaces --- */
  --color-charcoal: #1a1c1a;
  --color-charcoal-soft: #2a2d2a;
  --color-ivory: #f7f4ef;
  --color-ivory-muted: #ebe6de;
  --color-stone: #8a857b;
  --color-stone-light: #b5aea2;
  --color-moss: #4a5c45;
  --color-moss-deep: #3d4a39;
  --color-olive: #6b724f;
  --color-bronze: #8c7349;
  --color-bronze-muted: #a08b66;
  --color-sand: #d4c9b8;
  --color-taupe: #c4b8a5;
  --color-white: #ffffff;
  --color-black: #0d0e0d;

  /* Semantic */
  --color-bg: var(--color-ivory);
  --color-bg-alt: var(--color-ivory-muted);
  --color-surface: var(--color-white);
  --color-text: var(--color-charcoal);
  --color-text-muted: var(--color-stone);
  --color-border: color-mix(in srgb, var(--color-stone) 28%, transparent);
  --color-border-strong: color-mix(in srgb, var(--color-stone) 45%, transparent);
  --color-accent: var(--color-bronze);
  --color-accent-hover: var(--color-bronze-muted);
  --color-link: var(--color-moss-deep);
  --color-link-hover: var(--color-moss);
  --color-inverse-bg: var(--color-charcoal);
  --color-inverse-text: var(--color-ivory);

  /* --- Typography --- */
  --font-display: "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, monospace;

  --text-xs: clamp(0.75rem, 0.72rem + 0.12vw, 0.8125rem);
  --text-sm: clamp(0.8125rem, 0.78rem + 0.2vw, 0.875rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.25vw, 1rem);
  --text-md: clamp(1rem, 0.95rem + 0.35vw, 1.0625rem);
  --text-lg: clamp(1.0625rem, 1rem + 0.45vw, 1.125rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.65vw, 1.375rem);
  --text-2xl: clamp(1.5rem, 1.2rem + 1vw, 1.75rem);
  --text-3xl: clamp(1.875rem, 1.35rem + 1.75vw, 2.25rem);
  --text-4xl: clamp(2.25rem, 1.5rem + 2.5vw, 3rem);
  --text-5xl: clamp(2.75rem, 1.6rem + 3.5vw, 3.75rem);

  --leading-none: 1.05;
  --leading-tight: 1.2;
  --leading-snug: 1.35;
  --leading-normal: 1.55;
  --leading-relaxed: 1.65;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.08em;
  --tracking-caps: 0.14em;

  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;

  /* --- Spacing scale --- */
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 2.5rem;
  --space-2xl: 3.5rem;
  --space-3xl: 5rem;
  --space-4xl: 7rem;
  --space-section-y: clamp(3.5rem, 6vw, var(--space-4xl));
  --space-section-y-sm: clamp(2.5rem, 4vw, var(--space-3xl));

  /* --- Radii --- */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;

  /* --- Shadows --- */
  --shadow-sm: 0 1px 2px color-mix(in srgb, var(--color-black) 6%, transparent);
  --shadow-md: 0 4px 14px color-mix(in srgb, var(--color-black) 8%, transparent);
  --shadow-lg: 0 12px 40px color-mix(in srgb, var(--color-black) 12%, transparent);
  --shadow-header: 0 1px 0 var(--color-border), 0 8px 24px color-mix(in srgb, var(--color-black) 6%, transparent);

  /* --- Containers --- */
  --container-max: 72rem;
  --container-narrow: 42rem;
  --container-wide: 80rem;
  --container-pad-x: clamp(var(--space-md), 4vw, var(--space-2xl));
  --container-pad-y: var(--space-section-y);

  /* --- Motion --- */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 160ms;
  --duration-base: 240ms;
  --duration-slow: 420ms;
  --transition-color: color var(--duration-fast) var(--ease-out);
  --transition-transform: transform var(--duration-base) var(--ease-out);
  --transition-opacity: opacity var(--duration-base) var(--ease-out);
  --transition-shadow: box-shadow var(--duration-base) var(--ease-out);

  /* --- Z-index --- */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-drawer: 400;
  --z-skip: 500;

  /* --- Breakpoints (reference; pair with @media in layout/components) --- */
  --bp-xs: 22.5rem; /* 360px */
  --bp-sm: 36rem; /* 576px */
  --bp-md: 48rem; /* 768px */
  --bp-lg: 64rem; /* 1024px */
  --bp-xl: 80rem; /* 1280px */
  --bp-2xl: 90rem; /* 1440px */
  /* Primary nav + header CTA: desktop from this width. @media rules use literal 76rem — custom properties in media queries are not reliable in all browsers. */
  --bp-nav-desktop: 76rem;
  --nav-primary-gap: 1.05rem;

  /* --- Header (unified masthead; default = scrolled height for calm sticky bar) --- */
  --header-height: 5.875rem;
  --header-height-scrolled: 5.875rem;
}

@media (min-width: 76rem) {
  :root {
    --header-height: 6.875rem;
    --header-height-scrolled: 6.875rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-fast: 0.01ms;
    --duration-base: 0.01ms;
    --duration-slow: 0.01ms;
    --transition-color: none;
    --transition-transform: none;
    --transition-opacity: none;
    --transition-shadow: none;
  }
}