/* ============================================================================
   Ryvem — base: reset, typography, layout primitives, a11y guards
   ============================================================================ */

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

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + var(--sp-4));
}

body {
  min-height: 100%;
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Media defaults */
img, svg, video { display: block; max-width: 100%; }
img, video { height: auto; }

/* Form controls inherit type */
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; }

/* Links */
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Headings — tight, slightly negative tracking */
h1, h2, h3, h4 {
  line-height: var(--lh-tight);
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: balance;
}
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-lg); letter-spacing: -0.01em; }
h4 { font-size: var(--fs-md); letter-spacing: -0.01em; }

p { text-wrap: pretty; }

code, kbd, samp, pre { font-family: var(--mono); }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--sp-6) 0;
}

::selection { background: var(--accent-soft); color: var(--text); }

/* ---- layout primitives ------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-5);
}
.container--narrow { max-width: var(--container-narrow); }

/* Vertical rhythm for page sections */
.section { padding-block: var(--sp-9); }
.section--tight { padding-block: var(--sp-7); }

/* An eyebrow/kicker above a section title */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semi);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
}

/* A single decorative gradient hairline — the sparing accent */
.accent-rule {
  height: 2px; border: 0;
  background: var(--gradient-line);
  border-radius: var(--r-pill);
  opacity: .9;
}

/* ---- accessibility ----------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}
:focus:not(:focus-visible) { outline: none; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: var(--sp-3); top: -60px;
  z-index: var(--z-menu);
  padding: var(--sp-2) var(--sp-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: var(--text);
  transition: top var(--t) var(--ease);
}
.skip-link:focus { top: var(--sp-3); text-decoration: none; }

[hidden] { display: none !important; }

/* Respect reduced-motion everywhere */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}