/* Oddiom — minimal stylesheet
   One file, no dependencies. Light and dark via prefers-color-scheme. */

:root {
  --bg:      #fbfaf7;
  --fg:      #17150f;
  --muted:   #6d6a60;
  --line:    #e4e0d6;
  --card:    #ffffff;
  --accent:  #b4531f;

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --serif: "Iowan Old Style", Palatino, "Palatino Linotype", Georgia, serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --measure: 36rem;
  --gap: 4.5rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:     #121210;
    --fg:     #f1efe7;
    --muted:  #99968b;
    --line:   #2b2a26;
    --card:   #1b1b18;
    --accent: #e3925e;
  }
}

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

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

body {
  margin: 0;
  padding: 0 1.5rem;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ---------- links ---------- */

a { color: inherit; text-underline-offset: 0.2em; }
a:hover { color: var(--accent); }
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 1.5rem;
  top: 1rem;
  padding: 0.5rem 0.75rem;
  background: var(--card);
  border: 1px solid var(--line);
  z-index: 10;
}

/* ---------- header / footer ---------- */

.site-head,
.site-foot {
  max-width: var(--measure);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  align-items: baseline;
  justify-content: space-between;
}

.site-head {
  padding: 2.25rem 0 0;
}

.wordmark {
  font-family: var(--serif);
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.wordmark::after {
  content: "";
  display: inline-block;
  width: 0.3rem;
  height: 0.3rem;
  margin-left: 0.3rem;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: 0.1em;
}

.site-head nav,
.site-foot nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.875rem;
}
.site-head nav a,
.site-foot nav a { color: var(--muted); text-decoration: none; }
.site-head nav a:hover,
.site-foot nav a:hover { color: var(--accent); }

.site-foot {
  margin-top: var(--gap);
  padding: 1.5rem 0 3rem;
  border-top: 1px solid var(--line);
  font-size: 0.875rem;
  color: var(--muted);
}
.site-foot p { margin: 0; }

/* ---------- layout ---------- */

main {
  max-width: var(--measure);
  margin: 0 auto;
}

section { margin-top: var(--gap); }

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 7vw, 2.9rem);
  margin: 0 0 1.25rem;
}

h2 {
  font-size: 1.3rem;
  margin: 0 0 1rem;
}

h3 {
  font-size: 1.0625rem;
  margin: 0 0 0.35rem;
}

p { margin: 0 0 1rem; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 1.25rem;
}

.lede {
  font-size: 1.1875rem;
  color: var(--muted);
}

/* ---------- hero ---------- */

.hero { margin-top: 5rem; }

.cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.15rem;
  border: 1px solid var(--fg);
  border-radius: 999px;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn:hover {
  background: var(--fg);
  border-color: var(--fg);
  color: var(--bg);
}

.note {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- example card ---------- */

.demo h2 { margin-bottom: 1rem; }

.flip {
  perspective: 1200px;
  height: 230px;
  cursor: pointer;
  outline-offset: 6px;
}

.flip-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s cubic-bezier(0.4, 0.1, 0.2, 1);
  transform-style: preserve-3d;
}

.flip:hover .flip-inner,
.flip:focus .flip-inner,
.flip:focus-within .flip-inner {
  transform: rotateY(180deg);
}

.face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.75rem;
  padding: 1.75rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.back { transform: rotateY(180deg); }

.tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.phrase {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 5.5vw, 1.9rem);
  line-height: 1.15;
  margin: 0;
}

.hint,
.credit {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.meaning { margin: 0; }

@media (prefers-reduced-motion: reduce) {
  .flip-inner { transition: none; }
}

/* ---------- steps ---------- */

.steps {
  list-style: none;
  counter-reset: step;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2rem;
}

.steps li {
  counter-increment: step;
  padding-left: 2.5rem;
  position: relative;
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.15rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
}

.steps p { margin: 0; color: var(--muted); }

/* ---------- categories ---------- */

.cats {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.cats li {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  justify-content: space-between;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

.cats strong { font-weight: 600; }
.cats span { color: var(--muted); font-size: 0.9375rem; }

/* ---------- leaderboard blurb ---------- */

.board p { color: var(--muted); margin: 0; }

/* ---------- faq ---------- */

.faq { margin: 0; }

.faq dt {
  font-weight: 600;
  margin-top: 1.5rem;
}
.faq dt:first-of-type { margin-top: 0; }

.faq dd {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

/* ---------- privacy page ---------- */

.prose { margin-top: 4rem; }

.prose h2 {
  margin-top: 2.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.prose h3 {
  margin-top: 1.75rem;
  color: var(--muted);
}

.prose ul {
  margin: 0 0 1rem;
  padding-left: 1.1rem;
}

.prose li { margin-bottom: 0.5rem; }

.prose p,
.prose li { color: var(--muted); }

.prose .lede { color: var(--fg); }

.prose strong { color: var(--fg); }

.prose a { color: var(--accent); }