:root {
  --bg: #0e0f12;
  --fg: #eceff4;
  --muted: #a7aeb8;
  --card: #15171c;
  --border: #2a2e35;
  --accent: #5aa3ff;
  --shadow: 0 8px 28px rgba(0,0,0,.25);
  --radius: 12px;
  --focus: 2px solid #5aa3ff;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f9fc;
    --fg: #121317;
    --muted: #4b5563;
    --card: #ffffff;
    --border: #e5e7eb;
    --accent: #2563eb;
    --shadow: 0 8px 24px rgba(2,6,23,.08);
  }
}

[data-theme='light'] {
  --bg: #f7f9fc;
  --fg: #121317;
  --muted: #4b5563;
  --card: #ffffff;
  --border: #e5e7eb;
  --accent: #2563eb;
  --shadow: 0 8px 24px rgba(2,6,23,.08);
}

* { box-sizing: border-box }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, sans-serif
}

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

.skip-link {
  position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden
}
.skip-link:focus {
  left: 12px; top: 12px; width: auto; height: auto; padding: 8px 12px; background: var(--card);
  border: 1px solid var(--border); border-radius: 8px; box-shadow: var(--shadow)
}

.site-header { border-bottom: 1px solid var(--border); background: color-mix(in oklab, var(--bg) 94%, black) }
.nav {
  max-width: 960px; margin: 0 auto; padding: 14px 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--fg) }
.brand-name { font-weight: 650 }
.logo { display: block }

.nav-actions { display: flex; gap: 10px; align-items: center }
.nav-link { padding: 6px 10px; border-radius: 8px }
.nav-link.active, .nav-link:hover { background: color-mix(in oklab, var(--card) 88%, transparent) }

.container { max-width: 960px; margin: 0 auto; padding: 24px 16px }
.hero { text-align: center; padding: 12px 0 22px }
.tagline { color: var(--muted) }

.grid {
  display: grid; gap: 18px; align-items: start;
  grid-template-columns: minmax(260px, 1fr) minmax(280px, 1fr)
}
@media (max-width: 860px) { .grid { grid-template-columns: 1fr } }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 18px
}

.field { margin-bottom: 14px }
.field.two { display: grid; grid-template-columns: 1fr 1fr; gap: 14px }
label { display: block; font-weight: 600; margin-bottom: 6px }
.help { font-size: .9rem; color: var(--muted) }

input[type="color"] {
  width: 56px; height: 36px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg);
  padding: 0
}
select, input[type="range"] {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 10px; background: var(--bg); color: var(--fg)
}
input:focus, select:focus, button:focus { outline: var(--focus); outline-offset: 2px }

.actions { display: flex; gap: 10px; margin: 10px 0 2px }

.btn {
  appearance: none; border: 1px solid var(--border); background: color-mix(in oklab, var(--card) 90%, var(--accent) 10%);
  color: var(--fg); padding: 8px 12px; border-radius: 10px; cursor: pointer; transition: background-color .2s, transform .02s
}
.btn:hover { background: color-mix(in oklab, var(--card) 80%, var(--accent) 20%) }
.btn:active { transform: translateY(1px) }
.btn.ghost { background: transparent }
.btn.small { font-size: .9rem; padding: 6px 10px }

.wheel-wrap { margin-top: 10px; text-align: center }
#wheel { display: block; margin: 10px auto; border-radius: 50%; border: 1px solid var(--border) }
.wheel-note { font-size: .9rem; color: var(--muted) }

.palette h2 { margin-bottom: 10px }
.swatches {
  display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px
}
@media (max-width: 720px) { .swatches { grid-template-columns: repeat(2, minmax(0, 1fr)) } }
.swatch {
  border-radius: 12px; overflow: hidden; border: 1px solid var(--border); background: #222; display: flex; flex-direction: column
}
.swatch-color { height: 96px }
.swatch-meta {
  padding: 10px; display: grid; gap: 6px; background: color-mix(in oklab, var(--card) 92%, transparent)
}
.meta-row { display: flex; justify-content: space-between; gap: 8px; align-items: center }
.code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; font-size: .92rem }
.copy-btn {
  border: 1px solid var(--border); background: transparent; padding: 4px 8px; border-radius: 8px; cursor: pointer
}
.copy-btn:hover { background: color-mix(in oklab, var(--card) 86%, transparent) }

.badges { display: flex; gap: 6px; align-items: center; flex-wrap: wrap }
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 2px 6px; border-radius: 999px; border: 1px solid var(--border); font-size: .8rem }
.badge.aa { background: #16a34a20; color: #16a34a }
.badge.aaa { background: #1d4ed820; color: #1d4ed8 }
.badge.fail { background: #dc262620; color: #dc2626 }

.copy-actions { margin-top: 10px }

.how p { margin: 8px 0 }
.updated { color: var(--muted) }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace }

.site-footer { border-top: 1px solid var(--border); margin-top: 18px }
.footer-inner { display: flex; justify-content: center; padding: 18px 16px; color: var(--muted) }

.centered { display: grid; place-content: center; height: 100%; padding: 24px }

.prose p, .prose li { max-width: 65ch }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0
}