/* API for Taste — editorial monograph system
   Scene: private seminar after hours; lamp light; annotated margins.
   Strategy: restrained. Ink + paper + one oxblood accent. */

:root {
  --bg: oklch(0.975 0.004 95);
  --bg-elev: oklch(0.99 0.003 95);
  --bg-soft: oklch(0.955 0.006 95);
  --bg-inset: oklch(0.94 0.008 95);
  --ink: oklch(0.22 0.012 55);
  --ink-soft: oklch(0.38 0.014 55);
  --muted: oklch(0.48 0.012 55);
  --faint: oklch(0.72 0.008 55);
  --line: oklch(0.88 0.008 55);
  --line-strong: oklch(0.78 0.01 55);
  --accent: oklch(0.42 0.12 25);
  --accent-soft: oklch(0.55 0.1 25);
  --good: oklch(0.42 0.08 155);
  --warn: oklch(0.55 0.1 65);
  --bad: oklch(0.48 0.12 25);
  --serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: "Inter", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "Cascadia Code", ui-monospace, monospace;
  --measure: 38rem;
  --measure-wide: 46rem;
  --max: 68rem;
  --radius: 2px;
  --nav-h: 3.25rem;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  color-scheme: light;
}

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

html {
  scroll-behavior: smooth;
  hanging-punctuation: first last;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* —— Typography —— */
h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.02em;
  text-wrap: balance;
  color: var(--ink);
  line-height: 1.18;
}

h1 {
  font-size: clamp(2.15rem, 4.2vw, 3.15rem);
  font-weight: 500;
  margin: 0 0 1.25rem;
  max-width: 14ch;
}

h2 {
  font-size: clamp(1.45rem, 2.2vw, 1.75rem);
  margin: 0 0 0.85rem;
  max-width: 28ch;
}

h3 {
  font-size: 1.15rem;
  margin: 0 0 0.45rem;
  letter-spacing: -0.015em;
}

p { margin: 0 0 1.1rem; text-wrap: pretty; }
p:last-child { margin-bottom: 0; }

.lede {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 36rem;
  margin: 0 0 1.75rem;
}

.prose {
  max-width: var(--measure);
  color: var(--ink);
}

.prose p + p { margin-top: 0.15rem; }

.prose .drop {
  float: left;
  font-size: 3.4rem;
  line-height: 0.85;
  padding: 0.12em 0.12em 0 0;
  font-weight: 500;
  color: var(--accent);
}

.muted { color: var(--muted); }
.ink-soft { color: var(--ink-soft); }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  text-decoration-color: color-mix(in oklch, var(--accent) 45%, transparent);
  transition: text-decoration-color 0.2s var(--ease);
}
a:hover { text-decoration-color: var(--accent); }

em { font-style: italic; }
strong { font-weight: 600; }

.mono, code, pre, kbd {
  font-family: var(--mono);
  font-size: 0.84em;
  font-feature-settings: "ss01";
}

/* —— Layout —— */
.wrap {
  width: min(var(--max), calc(100% - 2.5rem));
  margin: 0 auto;
}

.page-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

@media (min-width: 1100px) {
  .page-shell.has-rail {
    grid-template-columns: minmax(0, 1fr) 13.5rem;
    gap: 3rem;
    align-items: start;
  }
}

main.page {
  min-width: 0;
  padding-bottom: 4rem;
}

/* —— Nav —— */
.nav {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--nav-h);
  padding: 1.15rem 0 1rem;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in oklch, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
}

.brand {
  font-family: var(--serif);
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.brand:hover { color: var(--accent); text-decoration: none; }
.brand span {
  color: var(--muted);
  font-weight: 400;
  font-style: italic;
  margin-left: 0.35rem;
  font-size: 0.92em;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.15rem 1.15rem;
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 450;
  letter-spacing: 0.01em;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--ink);
}
.nav-links a.active {
  box-shadow: inset 0 -1px 0 var(--ink);
}

/* —— Hero / masthead —— */
.masthead {
  padding: 3.75rem 0 2.5rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 3rem;
}

.issue-line {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 1.35rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
}
.issue-line .sep {
  width: 1.25rem;
  height: 1px;
  background: var(--line-strong);
  display: inline-block;
}

.byline {
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 1.5rem;
  max-width: 36rem;
}

/* —— Sections —— */
.section {
  padding: 0 0 2.75rem;
  margin: 0 0 0.25rem;
}

.section + .section {
  border-top: 1px solid var(--line);
  padding-top: 2.75rem;
}

.section-label {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.65rem;
}

/* —— Pull quote —— */
.pull {
  margin: 2rem 0;
  padding: 1.5rem 0 1.5rem 1.5rem;
  border-left: 1px solid var(--accent);
  max-width: 34rem;
}
.pull p {
  font-size: 1.35rem;
  line-height: 1.4;
  font-style: italic;
  color: var(--ink);
  margin: 0;
  letter-spacing: -0.015em;
}
.pull cite {
  display: block;
  margin-top: 0.85rem;
  font-family: var(--sans);
  font-size: 0.75rem;
  font-style: normal;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

/* —— Definition list / lexicon —— */
.lexicon {
  margin: 1.5rem 0 0;
  max-width: var(--measure-wide);
}
.lexicon dt {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.02rem;
  margin: 1.35rem 0 0.25rem;
  letter-spacing: -0.01em;
}
.lexicon dt:first-child { margin-top: 0; }
.lexicon dd {
  margin: 0;
  color: var(--ink-soft);
  max-width: var(--measure);
}

/* —— Two-column scholarly layout —— */
.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin: 1.5rem 0;
}
@media (min-width: 800px) {
  .split { grid-template-columns: 1fr 1fr; gap: 2.5rem; }
  .split.asymmetric {
    grid-template-columns: 1.35fr 1fr;
  }
}

.note-block {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 1.15rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  color: var(--ink-soft);
}
.note-block h3 {
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
}
.note-block p { margin-bottom: 0.65rem; }
.note-block p:last-child { margin-bottom: 0; }

/* —— Thesis grid (not identical cards) —— */
.thesis-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  max-width: var(--measure-wide);
  border-top: 1px solid var(--line);
}
.thesis-list li {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
}
.thesis-list .num {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding-top: 0.3rem;
}
.thesis-list h3 { margin: 0 0 0.3rem; }
.thesis-list p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

/* —— Operations (encode/score/…) —— */
.ops {
  display: grid;
  gap: 0;
  margin: 1.5rem 0 0;
  border-top: 1px solid var(--line);
  max-width: var(--measure-wide);
}
.ops article {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem 2rem;
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--line);
}
@media (min-width: 700px) {
  .ops article {
    grid-template-columns: 8rem 1fr;
    align-items: start;
  }
}
.ops .op-name {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--accent);
  padding-top: 0.2rem;
}
.ops h3 { margin: 0 0 0.25rem; font-size: 1.08rem; }
.ops p { margin: 0; color: var(--ink-soft); font-size: 0.98rem; }

/* —— Tables —— */
.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin: 1rem 0 0;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  font-family: var(--sans);
}
th, td {
  text-align: left;
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  font-weight: 500;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--bg-soft);
}
tr:last-child td { border-bottom: 0; }
td.mono, th.mono { font-family: var(--mono); font-size: 0.8rem; }

/* —— Code —— */
pre {
  background: var(--bg-inset);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  overflow: auto;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 1rem 0 0;
}

/* —— Buttons —— */
.row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 0.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  border: 1px solid var(--line-strong);
  background: var(--bg-elev);
  color: var(--ink);
  padding: 0.55rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.15s var(--ease), background 0.15s var(--ease), color 0.15s var(--ease);
}
.btn:hover {
  border-color: var(--ink);
  text-decoration: none;
  color: var(--ink);
}
.btn.primary {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.btn.primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}
.btn.ghost {
  background: transparent;
}

/* —— Rail TOC —— */
.rail {
  display: none;
  position: sticky;
  top: calc(var(--nav-h) + 1.5rem);
  padding-top: 0.25rem;
  font-family: var(--sans);
}
@media (min-width: 1100px) {
  .rail { display: block; }
}
.rail h4 {
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 0.75rem;
}
.rail ol {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line);
}
.rail a {
  display: block;
  padding: 0.28rem 0 0.28rem 0.85rem;
  font-size: 0.78rem;
  color: var(--muted);
  text-decoration: none;
  line-height: 1.35;
}
.rail a:hover { color: var(--ink); }

/* —— Applications —— */
.app-row {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
  margin-top: 1.25rem;
}
.app-row article {
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 0.5rem 2rem;
}
@media (min-width: 720px) {
  .app-row article {
    grid-template-columns: 11rem 1fr;
  }
}
.app-row .who {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 0.2rem;
}
.app-row h3 { margin: 0 0 0.35rem; }
.app-row p { margin: 0; color: var(--ink-soft); font-size: 0.98rem; }

/* —— Footnotes / colophon —— */
.footnotes {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
  color: var(--muted);
  max-width: var(--measure);
  font-family: var(--sans);
}
.footnotes ol {
  margin: 0.5rem 0 0;
  padding-left: 1.25rem;
}
.footnotes li { margin: 0.35rem 0; }

.footer {
  border-top: 1px solid var(--line);
  padding: 1.75rem 0 2.75rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}
.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: var(--ink); }

/* —— Playground —— */
.play-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 1.5rem 0 2rem;
}
@media (min-width: 860px) {
  .play-layout { grid-template-columns: 1fr 1fr; }
}

.panel {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.3rem;
}
.panel h3 {
  font-size: 1rem;
  margin: 0 0 0.75rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--line);
}

label {
  display: block;
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0.75rem 0 0.3rem;
}
label:first-of-type { margin-top: 0; }

input, textarea, select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 0.55rem 0.7rem;
  font-family: var(--serif);
  font-size: 0.98rem;
  line-height: 1.45;
}
input:focus, textarea:focus, select:focus {
  outline: 1px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}
textarea { min-height: 110px; resize: vertical; }

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.5rem;
}
.tag {
  font-family: var(--sans);
  font-size: 0.72rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  color: var(--muted);
}

.score-big {
  font-family: var(--serif);
  font-size: 2.75rem;
  font-weight: 500;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  margin: 0.5rem 0 0.35rem;
}
.verdict-good { color: var(--good); }
.verdict-mixed { color: var(--warn); }
.verdict-bad { color: var(--bad); }

.pill {
  display: inline-block;
  font-family: var(--sans);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.epigraph {
  max-width: 28rem;
  margin: 0 0 2rem;
  font-style: italic;
  color: var(--ink-soft);
  font-size: 1.05rem;
  line-height: 1.5;
}
.epigraph footer {
  margin-top: 0.6rem;
  font-family: var(--sans);
  font-size: 0.75rem;
  font-style: normal;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  border: 0;
  padding: 0;
}

/* marginalia */
.margin-note {
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.45;
  border-top: 1px solid var(--line);
  padding-top: 0.75rem;
  margin-top: 1.5rem;
  max-width: 22rem;
}

/* reading rhythm for long essays */
.essay .section h2 {
  margin-top: 0.25rem;
}
.essay .prose {
  font-size: 1.08rem;
  line-height: 1.7;
}