/* ============================================================
   Base reset + typography
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-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"] { list-style: none; padding: 0; }

html, body { height: 100%; }
img, picture, svg, video, canvas { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.55;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

h1 { font-size: var(--text-hero); font-weight: 500; letter-spacing: -0.035em; }
h2 { font-size: var(--text-3xl); letter-spacing: -0.025em; }
h3 { font-size: var(--text-xl); letter-spacing: -0.015em; }
h4 { font-size: var(--text-lg); letter-spacing: -0.01em; }

p { color: var(--color-ink-2); }

/* Focus states */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: var(--color-accent); color: #fff; }

/* Containers + section rhythm */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 40px);
}

section {
  padding-block: clamp(64px, 9vw, 128px);
}

/* Utility: eyebrow / section label */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--color-accent);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 500;
  font-size: var(--text-sm);
  letter-spacing: -0.005em;
  transition: transform var(--dur-fast) var(--ease-out),
              background var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-ink);
  color: var(--color-bg);
}
.btn-primary:hover { background: var(--color-accent); }
.btn-primary .arrow { transition: transform var(--dur-base) var(--ease-out); }
.btn-primary:hover .arrow { transform: translateX(3px); }

.btn-secondary {
  background: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-ink);
  background: var(--color-surface);
}

.btn-ghost {
  padding: 10px 14px;
  color: var(--color-ink-2);
  font-size: var(--text-sm);
}
.btn-ghost:hover { color: var(--color-accent); }

/* Skip link */
.skip-link {
  position: fixed;
  top: 12px;
  left: 16px;
  padding: 8px 14px;
  background: var(--color-ink);
  color: var(--color-bg);
  border-radius: 6px;
  z-index: 100;
  transform: translateY(-140%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}
.skip-link:focus {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* Visually hidden (a11y) */
.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;
}