/* ── boreal / styles-base.css ── shared foundation ── */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg:       #0d0d0d;
  --surface:  #111111;
  --white:    #f5f3f0;
  --dim:      rgba(245,243,240,0.7);
  --faint:    rgba(245,243,240,0.5);
  --muted:    rgba(245,243,240,0.2);
  --orange:   #e8620a;
  --green:    #39e87a;
  --blue:     #2d8fe8;
  --font-serif: 'Calistoga', serif;
  --font-mono:  'JetBrains Mono', monospace;
  --header-h:   56px;
  --content-max: 1200px;
  --gutter: clamp(16px, 4vw, 48px);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

html, body {
  background: var(--bg);
  color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── grain overlay ── */
#grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 200;
}


/* ── skip to content link ── */
.skip-link {
  position: absolute;
  top: -9999px;
  left: var(--gutter);
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 300;
  border: 1px solid var(--muted);
  transition: top 0.2s;
}
.skip-link:focus { top: 8px; }

/* ── disabled nav links ── */
.nav-link--disabled {
  opacity: 0.3;
  pointer-events: none;
  cursor: default;
}

/* ── visually hidden (SEO) ── */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── tags ── */
.tag {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 300;
  letter-spacing: 0.12em;
  text-transform: lowercase;
  color: var(--dim);
  border: 1px solid var(--muted);
  padding: 4px 10px;
  border-radius: 0;
  display: inline-block;
}

/* ── header ── */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  z-index: 100;
  transition: opacity 0.6s var(--ease-out-expo),
              transform 0.6s var(--ease-out-expo),
              background 0.4s ease,
              backdrop-filter 0.4s ease;
}

#site-header .header-logo {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--white);
  text-decoration: none;
  letter-spacing: -0.01em;
}

#site-header nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

#site-header nav a {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--faint);
  text-decoration: none;
  text-transform: lowercase;
  transition: color 0.2s;
}

#site-header nav a:hover { color: var(--white); }
#site-header nav a.active { color: var(--white); }

#site-header.is-scrolled {
  background: rgba(13,13,13,0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* ── grain script (shared) ── */