/* ============================================================
   Sterling & Cole — base.css
   Reset · design tokens · typography · utilities
   ============================================================ */

:root {
  /* Warm monochrome palette */
  --bg:        #f7f7f2;   /* warm off-white */
  --bg-alt:    #efede7;   /* secondary warm */
  --dark:      #191818;   /* near-black section */
  --dark-soft: #23211f;

  --ink:       #191818;   /* primary text */
  --ink-70:    rgba(25, 24, 24, 0.72);
  --ink-55:    rgba(25, 24, 24, 0.68);
  --line:      rgba(25, 24, 24, 0.14);
  --line-soft: rgba(25, 24, 24, 0.08);

  --on-dark:      #f2efe9;
  --on-dark-60:   rgba(242, 239, 233, 0.62);
  --on-dark-line: rgba(242, 239, 233, 0.16);

  /* Type */
  --serif: "IBM Plex Serif", Georgia, "Times New Roman", serif;
  --sans:  "IBM Plex Sans", system-ui, -apple-system, Segoe UI, sans-serif;

  /* Space */
  --gutter: 20px;
  --maxw: 1200px;
  --radius: 3px;

  --section-y: clamp(4.5rem, 9vw, 8rem);
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0;
  color: var(--ink);
}

h1 { font-size: clamp(2.6rem, 6.2vw, 4rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(2rem, 4.4vw, 3rem); letter-spacing: -0.03em; }
h3 { font-size: clamp(1.35rem, 2.2vw, 1.6rem); letter-spacing: -0.02em; }

h1 em, h2 em, .band-statement em { font-style: italic; }

p { margin: 0; }

/* Eyebrow label */
.eyebrow {
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-55);
  margin-bottom: 1.25rem;
}

/* Layout helpers */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.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;
}

.skip-link {
  position: absolute; left: 50%; top: -60px; transform: translateX(-50%);
  background: var(--dark); color: var(--on-dark);
  padding: 0.6rem 1.1rem; border-radius: var(--radius);
  z-index: 200; transition: top 0.2s ease;
}
.skip-link:focus { top: 12px; }

/* Focus visibility */
:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  border-radius: 1px;
}
.section-dark :focus-visible { outline-color: var(--on-dark); }

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