/* yea.llc — the yes desk.
   One sheet, hand written for this site. Card stack, very large humanist type,
   letter grades. Class convention: every class on this site starts yy-.
   Colours are measured, not eyeballed — ratios noted beside each token. */

@layer base, stack, card, strip, bits;

@layer base {
  :root {
    --paper: #fbfaf6;
    --ink: #12100e;          /* on paper: 18.18:1 */
    --mute: #5a544c;         /* on paper:  7.16:1 */
    --hot: #ff6b00;          /* block fill only; ink on hot: 6.65:1 */
    --hot-ink: #a63c00;      /* on paper:  6.15:1 — the link colour */
    --volt: #6e1b9e;         /* on paper:  8.69:1 — the focus ring */
    --hair: #ded8cc;         /* decorative rules only */
    --edge: #6b6459;         /* real UI borders: 5.60:1 */
    --onink: #cfc9be;        /* on ink: 11.53:1 */
    --onink-mute: #a9a296;   /* on ink:  7.50:1 */
    --huge: clamp(2.9rem, 9vw, 6.2rem);
    --big: clamp(2rem, 5vw, 3.4rem);
    --mid: clamp(1.35rem, 2.6vw, 1.9rem);
    --read: clamp(1.09rem, 1.05rem + 0.4vw, 1.31rem);
    --humanist: Seravek, "Gill Sans Nova", Ubuntu, Calibri, "Noto Sans", "DejaVu Sans",
                "Segoe UI", system-ui, sans-serif;
    --plain: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  }

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

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

  body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--humanist);
    font-size: var(--read);
    line-height: 1.62;
    text-rendering: optimizeLegibility;
  }

  p { margin: 0 0 1.15em; }
  h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -0.022em; line-height: 1.04; }
  ul { margin: 0 0 1.15em; padding-left: 1.15em; }
  li { margin-bottom: 0.35em; }

  a { color: var(--hot-ink); text-decoration-thickness: 0.09em; text-underline-offset: 0.18em; }
  a:hover { color: var(--volt); }

  :focus-visible {
    outline: 3px solid var(--volt);
    outline-offset: 2px;
    border-radius: 2px;
  }

  img { max-width: 100%; height: auto; display: block; }

  .yy-skip {
    position: absolute; left: -9999px; top: 0;
    background: var(--ink); color: var(--paper);
    padding: 0.7em 1.1em; z-index: 40; text-decoration: none;
  }
  .yy-skip:focus { left: 0.6rem; top: 0.6rem; }
}

@layer stack {
  .yy-shell { width: 100%; max-width: 63rem; margin-inline: auto; padding-inline: 16px; }

  .yy-mast {
    border-bottom: 2px solid var(--ink);
    padding-block: 1.05rem 0.9rem;
    display: flex; flex-wrap: wrap; gap: 0.6rem 1.4rem;
    align-items: baseline; justify-content: space-between;
  }
  .yy-mark {
    font-size: 1.5rem; font-weight: 800; letter-spacing: -0.05em;
    color: var(--ink); text-decoration: none;
  }
  .yy-mark span { color: var(--hot-ink); }
  .yy-ways { display: flex; gap: 1.05rem; flex-wrap: wrap; font-size: 0.95rem; }
  .yy-ways a { color: var(--ink); text-decoration: none; border-bottom: 2px solid var(--hair); padding-bottom: 2px; }
  .yy-ways a:hover, .yy-ways a[aria-current="page"] { border-bottom-color: var(--hot); color: var(--hot-ink); }

  /* the card stack — one subject per card, snapped on a big screen */
  .yy-stack { display: block; padding-block: 2.4rem 0; }
  .yy-stack > * + * { margin-top: 2.6rem; }

  .yy-foot {
    margin-top: 4rem;
    border-top: 2px solid var(--ink);
    padding-block: 1.5rem 3rem;
    font-size: 0.93rem; color: var(--mute);
  }
  .yy-foot p { margin-bottom: 0.5em; max-width: 46rem; }
  .yy-foot a { color: var(--mute); }
}

@layer card {
  .yy-card {
    border: 2px solid var(--ink);
    padding: clamp(1.2rem, 3.4vw, 2.4rem);
    background: var(--paper);
  }
  .yy-card--ink { background: var(--ink); color: var(--onink); border-color: var(--ink); }
  .yy-card--ink h2, .yy-card--ink h3 { color: var(--paper); }
  .yy-card--ink a { color: var(--hot); }
  .yy-card--ink .yy-kicker { color: var(--onink-mute); }
  .yy-card--hot { background: var(--hot); border-color: var(--ink); color: var(--ink); }
  .yy-card--hot a { color: var(--ink); }

  .yy-kicker {
    font-family: var(--plain);
    font-size: 0.74rem; letter-spacing: 0.17em; text-transform: uppercase;
    color: var(--mute); margin: 0 0 0.9rem;
  }

  .yy-shout { font-size: var(--huge); letter-spacing: -0.04em; margin-bottom: 0.4em; }
  .yy-head { font-size: var(--big); margin-bottom: 0.5em; }
  .yy-sub { font-size: var(--mid); font-weight: 600; letter-spacing: -0.02em; margin-bottom: 0.55em; }

  .yy-lede { font-size: clamp(1.2rem, 1.9vw, 1.5rem); line-height: 1.42; max-width: 34ch; }

  .yy-body { max-width: 38rem; }
  .yy-body p:first-of-type::first-line { font-weight: 600; }

  /* the verdict: a letter grade and one line, never a paragraph */
  .yy-verdict {
    display: grid; grid-template-columns: auto 1fr; gap: 0 clamp(1rem, 3vw, 2rem);
    align-items: center; margin-block: 0.4rem 0;
  }
  .yy-grade {
    font-size: clamp(4.2rem, 13vw, 8rem); line-height: 0.8; font-weight: 800;
    letter-spacing: -0.06em; color: var(--ink);
  }
  .yy-card--ink .yy-grade { color: var(--hot); }
  .yy-card--hot .yy-grade { color: var(--ink); }
  .yy-rule-line { font-size: clamp(1.15rem, 2.2vw, 1.55rem); line-height: 1.3; font-weight: 600; }
  .yy-rule-line span { display: block; font-size: 0.72rem; font-family: var(--plain);
    letter-spacing: 0.17em; text-transform: uppercase; font-weight: 400;
    color: var(--mute); margin-bottom: 0.5rem; }
  .yy-card--ink .yy-rule-line span { color: var(--onink-mute); }

  .yy-open {
    display: inline-block; margin-top: 0.4rem;
    background: var(--ink); color: var(--paper);
    padding: 0.62em 1.15em; font-weight: 700; text-decoration: none;
    border: 2px solid var(--ink);
  }
  .yy-open:hover { background: var(--hot); color: var(--ink); }
  .yy-card--ink .yy-open { background: var(--hot); color: var(--ink); border-color: var(--hot); }
  .yy-card--ink .yy-open:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }
}

@layer strip {
  /* sequence strip — frames in order, each one a step in something happening */
  .yy-strip { margin: 2.2rem 0; }
  .yy-strip > ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.6rem; }
  .yy-frame { border: 2px solid var(--ink); background: var(--paper); }
  .yy-frame img { width: 100%; border-bottom: 2px solid var(--ink); }
  .yy-frame figcaption { padding: 0.85rem clamp(0.8rem, 2vw, 1.15rem) 1rem; font-size: 0.97rem; line-height: 1.5; }
  .yy-step {
    display: inline-block; background: var(--hot); color: var(--ink);
    font-family: var(--plain); font-size: 0.72rem; letter-spacing: 0.15em;
    text-transform: uppercase; padding: 0.22em 0.55em; margin-right: 0.5em;
    font-weight: 700; vertical-align: 0.1em;
  }

  .yy-counted { border-top: 2px solid var(--ink); margin-top: 2rem; padding-top: 1.1rem; }
  .yy-counted dl { display: grid; grid-template-columns: 1fr auto; gap: 0.1rem 1rem; margin: 0; }
  .yy-counted dt { font-size: 0.97rem; color: var(--mute); padding-block: 0.32rem; border-bottom: 1px solid var(--hair); }
  .yy-counted dd { margin: 0; font-family: var(--plain); font-size: 0.97rem; text-align: right;
    padding-block: 0.32rem; border-bottom: 1px solid var(--hair); font-variant-numeric: tabular-nums; }
  .yy-when { font-size: 0.83rem; color: var(--mute); margin-top: 0.8rem; font-family: var(--plain); }
}

@layer bits {
  .yy-flaw { border-left: 8px solid var(--hot); padding-left: clamp(0.9rem, 2.5vw, 1.4rem); margin: 1.8rem 0; }
  .yy-flaw h3 { font-size: 1.22rem; margin-bottom: 0.35em; }
  .yy-flaw p:last-child { margin-bottom: 0; }

  .yy-quote { font-size: clamp(1.25rem, 2.6vw, 1.75rem); line-height: 1.3; font-weight: 600;
    letter-spacing: -0.02em; margin: 1.9rem 0; max-width: 26ch; }
  .yy-quote cite { display: block; font-style: normal; font-size: 0.83rem; font-family: var(--plain);
    letter-spacing: 0.14em; text-transform: uppercase; color: var(--mute); margin-top: 0.7rem; }

  .yy-deck { display: grid; gap: 1.4rem; }
  @media (min-width: 46rem) { .yy-deck { grid-template-columns: repeat(3, 1fr); } }
  .yy-deck .yy-card { padding: 1.2rem; }
  .yy-deck .yy-grade { font-size: clamp(2.6rem, 6vw, 3.4rem); }

  .yy-tail { font-size: 0.93rem; color: var(--mute); }
  .yy-tail a { color: var(--hot-ink); }

  .yy-prev { display: flex; flex-wrap: wrap; gap: 0.9rem 1.6rem; margin-top: 2.6rem; font-size: 0.97rem; }

  .yy-note { font-size: 0.93rem; color: var(--mute); }
}

/* motion: card edges lift on a pointer that can hover; nothing moves otherwise */
@media (hover: hover) and (pointer: fine) {
  .yy-card--lift { transition: transform 180ms ease, box-shadow 180ms ease; }
  .yy-card--lift:hover, .yy-card--lift:focus-within { transform: translateY(-4px); box-shadow: 10px 10px 0 var(--ink); }
  .yy-frame { transition: box-shadow 180ms ease; }
  .yy-frame:hover { box-shadow: 8px 8px 0 var(--hot); }
}
@media (min-width: 70rem) and (prefers-reduced-motion: no-preference) {
  .yy-stack--snap { scroll-snap-type: y proximity; }
  .yy-stack--snap > .yy-card { scroll-snap-align: start; scroll-margin-top: 1.2rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important; scroll-behavior: auto !important;
  }
  .yy-card--lift:hover, .yy-card--lift:focus-within { transform: none; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #100f0d;
    --ink: #f3efe7;          /* on paper(dark): 17.4:1 */
    --mute: #a9a296;         /* 7.4:1 */
    --hot-ink: #ff8a33;      /* 9.9:1 */
    --volt: #c98bff;         /* 8.9:1 */
    --hair: #34312c;
    --edge: #8a8377;
    --onink: #23211d;
    --onink-mute: #4a463f;
  }
  body { background: var(--paper); color: var(--ink); }
  .yy-card { background: #171512; border-color: var(--ink); }
  .yy-card--ink { background: var(--ink); color: #1a1815; }
  .yy-card--ink h2, .yy-card--ink h3 { color: #100f0d; }
  .yy-card--ink a, .yy-card--ink .yy-grade { color: #a63c00; }
  .yy-card--ink .yy-kicker, .yy-card--ink .yy-rule-line span { color: #4a463f; }
  .yy-card--ink .yy-open { background: #100f0d; color: var(--ink); border-color: #100f0d; }
  .yy-card--hot { background: var(--hot); color: #12100e; }
  .yy-card--hot .yy-grade, .yy-card--hot a { color: #12100e; }
  .yy-skip { background: var(--ink); color: var(--paper); }
  .yy-open { background: var(--ink); color: #100f0d; border-color: var(--ink); }
  .yy-open:hover { background: var(--hot); color: #12100e; border-color: var(--hot); }
  .yy-frame img { border-bottom-color: var(--ink); }
  .yy-step { color: #12100e; }
  .yy-card--lift:hover, .yy-card--lift:focus-within { box-shadow: 10px 10px 0 var(--ink); }
}

@layer bits {
  .yy-deckhead { margin-bottom: 1rem; }
  .yy-sub--after { margin-top: 1rem; }
}

/* measured fix: the kicker's muted grey fails on the fluorescent block in both
   schemes (2.62:1 light, 1.13:1 dark). This brown reads 5.11:1 on #ff6b00. */
@layer bits {
  .yy-card--hot .yy-kicker,
  .yy-card--hot .yy-rule-line span { color: #3a2410; }
}
@media (prefers-color-scheme: dark) {
  .yy-card--hot .yy-kicker,
  .yy-card--hot .yy-rule-line span { color: #3a2410; }
}