/* =====================================================================
   base.css — modern reset + typography defaults + layout primitives
   ===================================================================== */

/* ---------- Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
}

ul[role="list"],
ol[role="list"] { padding: 0; list-style: none; }

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

button { background: none; border: 0; cursor: pointer; padding: 0; }

a { color: inherit; }

table { border-collapse: collapse; border-spacing: 0; }

/* Prefer-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Document ---------- */
html, body { min-height: 100%; }

body {
  /* Paper-grain noise baked into the body background via inline SVG. Layered
     ~4% opacity over the cream to add warmth and kill the flat-screen feel of
     pure #F6F2EC. Honors prefers-reduced-motion (no motion cost — static). */
  background-color: var(--bg-cream);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='320' height='320'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.045'/></svg>");
  background-size: 320px 320px;
  background-repeat: repeat;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-weight: var(--fw-regular);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern", "liga", "calt";
}

::selection {
  background: var(--gold);
  color: var(--bg-cream);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--fw-regular);
  color: var(--ink);
  text-wrap: balance;
}

h1 {
  font-size: var(--fs-h1);
  line-height: var(--lh-display);
  letter-spacing: var(--tracking-display);
  font-variation-settings: "opsz" 144, "SOFT" 30;
}

h2 {
  font-size: var(--fs-h2);
  line-height: var(--lh-h2);
  letter-spacing: var(--tracking-h2);
  font-variation-settings: "opsz" 96, "SOFT" 30;
}

h3 {
  font-size: var(--fs-h3);
  line-height: var(--lh-h3);
  letter-spacing: var(--tracking-h3);
  font-variation-settings: "opsz" 48;
}

h4 {
  font-size: var(--fs-h4);
  line-height: var(--lh-tight);
  font-variation-settings: "opsz" 24;
}

h5 {
  font-family: var(--font-body);
  font-size: var(--fs-h5);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-body);
}

/* H6 is treated as a small-caps eyebrow — used to label sections */
h6 {
  font-family: var(--font-body);
  font-size: var(--fs-h6);
  font-weight: var(--fw-semibold);
  line-height: 1;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--gold-deep);
}

p {
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  text-wrap: pretty;
  max-width: 65ch;
}

/* Lede / opening paragraph */
.lede {
  font-size: var(--fs-lede);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 38ch;
}

.caption {
  font-size: var(--fs-caption);
  line-height: var(--lh-caption);
  color: var(--warm-gray);
  letter-spacing: 0.005em;
}

.small { font-size: var(--fs-small); color: var(--warm-gray); }

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  text-decoration-color: var(--gold);
  transition: color var(--duration-fast) var(--ease-out),
              text-decoration-color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--gold-deep);
  text-decoration-color: var(--gold-deep);
}

a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

strong, b { font-weight: var(--fw-semibold); }
em, i { font-style: italic; }

blockquote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.5rem, 2vw + 0.75rem, 2.25rem);
  line-height: 1.3;
  color: var(--ink);
  max-width: 32ch;
  font-variation-settings: "opsz" 72;
}

hr {
  border: 0;
  border-top: var(--rule-width) solid var(--rule);
  margin: var(--space-8) 0;
}

/* ---------- Layout primitives ---------- */

/* Containers — clamp width and add gutter padding */
.container {
  width: 100%;
  max-width: var(--container-standard);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.prose {
  width: 100%;
  max-width: var(--container-prose);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.prose > * + * { margin-top: var(--space-6); }
.prose h2 { margin-top: var(--space-12); }
.prose h3 { margin-top: var(--space-10); }
.prose h6 + * { margin-top: var(--space-3); }

/* Section — vertical rhythm wrapper */
.section {
  padding-block: var(--section-y);
}

.section-sm { padding-block: var(--section-y-sm); }
.section-lg { padding-block: var(--section-y-lg); }

.section-bleed {
  padding-block: var(--section-y);
  background-color: var(--bg-cream-deep);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='320' height='320'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.05'/></svg>");
  background-size: 320px 320px;
  position: relative;
}

.section-ink {
  padding-block: var(--section-y);
  background: var(--ink);
  color: var(--bg-cream);
}

.section-ink h1,
.section-ink h2,
.section-ink h3,
.section-ink h4 { color: var(--bg-cream); }

.section-ink a { color: var(--bg-cream); text-decoration-color: var(--gold-soft); }

/* Stack utility — vertical spacing between children */
.stack > * + * { margin-top: var(--space-4); }
.stack-sm > * + * { margin-top: var(--space-2); }
.stack-lg > * + * { margin-top: var(--space-8); }
.stack-xl > * + * { margin-top: var(--space-12); }

/* Cluster — horizontal layout that wraps */
.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

/* Skip link — accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--ink);
  color: var(--bg-cream);
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  z-index: var(--z-overlay);
  transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus { top: var(--space-4); }

/* Scroll fade-in (paired with main.js) */
.fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Visually hidden — for accessible labels */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}