/* Christian Reich López — v2, business-card language
   White paper, black ink, pale grey prose, serif wordmark, dot-matrix ridge. */
:root {
  color-scheme: light;
  --paper: #FFFFFF;
  --ink: #0A0A0A;
  --grey: #7C7C7C;      /* readable grey prose (AA on white) */
  --ghost: #E4E4E4;     /* faint dots and hairlines */
  --serif: "Instrument Serif", "Times New Roman", serif;
  --sans: "Inter Tight", "Helvetica Neue", Arial, sans-serif;
  --hand: "Caveat", "Segoe Print", cursive;
  --display: var(--serif);
  --display-weight: 400;
  --display-track: -.035em;
}
/* Option B: bold neo-grotesk display, set data-type="grotesk" on <html> */
:root[data-type="grotesk"] { --display: var(--sans); --display-weight: 700; --display-track: -.05em; }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 14px/1.45 var(--sans); letter-spacing: -.005em;
}
a { color: inherit; text-decoration: none; background-image: linear-gradient(currentColor, currentColor); background-size: 0 1px; background-position: 0 100%; background-repeat: no-repeat; transition: background-size .25s; }
a:hover { background-size: 100% 1px; }
a:focus-visible { outline: 1px solid var(--ink); outline-offset: 4px; }
img { display: block; max-width: 100%; height: auto; }

.wrap { max-width: 1440px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 900px) { .wrap { padding: 0 56px; } }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; background: var(--ink); color: var(--paper); padding: 6px 10px; z-index: 9; }

/* Top line */
.top { display: flex; justify-content: space-between; align-items: baseline; padding: 24px 0; font-size: 13px; }
.top nav { display: flex; gap: 22px; }
@media (max-width: 700px) { .top nav .opt { display: none; } }

/* The card: three columns like the reference spread */
.card { display: grid; gap: 28px; padding: 72px 0; }
@media (min-width: 900px) {
  .card { grid-template-columns: 1.15fr 1fr 1fr 120px; gap: 48px; align-items: start; padding: 120px 0; }
}

/* Hero */
.hero { min-height: min(86vh, 860px); align-items: center !important; padding-top: 40px; }
.wordmark { font: var(--display-weight) clamp(3.4rem, 7.2vw, 7rem)/.9 var(--display); letter-spacing: var(--display-track); margin: 0; }
:root[data-type="grotesk"] .wordmark { font-size: clamp(3rem, 6.4vw, 6.2rem); line-height: .92; }
.wordmark sup { font: 400 max(12px, .16em)/1 var(--sans); letter-spacing: 0; vertical-align: top; position: relative; top: .5em; margin-left: .25em; }
.prose { color: var(--grey); max-width: 34ch; font-size: 14px; line-height: 1.5; }
.prose p { margin: 0 0 1.1em; }
.prose p:last-child { margin: 0; }
.details { font-size: 14px; line-height: 1.3; }
.details p { margin: 0 0 18px; }
.details .pair { display: grid; grid-template-columns: auto auto; gap: 0 28px; justify-content: start; align-items: end; margin-bottom: 18px; }
.hand { font: 400 22px/1 var(--hand); letter-spacing: .02em; display: inline-block; transform: rotate(-3deg); }
.mark { justify-self: end; width: 120px; }
@media (max-width: 899px) { .mark { justify-self: start; width: 96px; order: -1; } }
.mark .on { fill: var(--ink); }
.mark .off { fill: var(--ghost); }
.portrait { width: 120px; height: 144px; object-fit: cover; margin-bottom: 22px; }

/* Section labels */
.label { font: var(--display-weight) clamp(2rem, 3.4vw, 3rem)/.95 var(--display); letter-spacing: -.02em; margin: 0; }
:root[data-type="grotesk"] .label { font-size: clamp(1.7rem, 2.8vw, 2.5rem); letter-spacing: -.035em; }
.idx { font: 400 13px/1 var(--sans); color: var(--grey); display: block; margin-bottom: 14px; }
.rule { height: 1px; background: var(--ghost); border: 0; margin: 0; }

/* Lists in the details column */
.plain { list-style: none; padding: 0; margin: 0; }
.plain li { margin: 0 0 18px; }
.plain .yr { display: block; color: var(--grey); font-size: 12px; margin-bottom: 2px; }
.plain cite { font-style: italic; }
.tags { color: var(--ink); }

/* FAQ */
details { padding: 14px 0; border-top: 1px solid var(--ghost); }
details:last-of-type { border-bottom: 1px solid var(--ghost); }
summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--grey); }
details[open] summary::after { content: "−"; }
details p { color: var(--grey); margin: 8px 0 0; max-width: 46ch; }

/* Closing */
.close-mail { font: var(--display-weight) clamp(2.2rem, 6vw, 5.4rem)/1 var(--display); letter-spacing: var(--display-track); word-break: break-word; }
footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 28px 0 40px; font-size: 12px; color: var(--grey); }

@media (prefers-reduced-motion: no-preference) {
  .mark .on { opacity: 0; animation: dot .5s ease-out forwards; }
  @keyframes dot { to { opacity: 1; } }
}

/* Topic map: photo in the centre, topics joined by hand-drawn dashed lines */
.map { container-type: inline-size; position: relative; aspect-ratio: 16 / 10; max-width: 100%; margin: 0 auto; }
.map img { position: absolute; left: 27%; width: 46%; bottom: 0; height: auto; }
.map svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.map path { fill: none; stroke: var(--ink); stroke-width: 2.2; stroke-dasharray: 9 9; stroke-linecap: round; }
.map ul { list-style: none; margin: 0; padding: 0; }
.map li { position: absolute; font: var(--display-weight) 3.3cqw/1 var(--display); letter-spacing: -.02em; white-space: nowrap; }
.map li.r { text-align: right; } .map li.c { text-align: center; }
.map li.r { transform: translateX(-100%); }
.map li.c { transform: translateX(-50%); }
@media (max-width: 640px) {
  .map { aspect-ratio: auto; display: flex; flex-direction: column-reverse; gap: 20px; }
  .map img { position: static; width: 78%; margin: 0 auto; }
  .map svg { display: none; }
  .map ul { display: flex; flex-wrap: wrap; gap: 6px 18px; justify-content: center; text-align: center; }
  .map li, .map li.r, .map li.c { position: static; transform: none; font-size: 1.5rem; text-align: center; }
  .map li br { display: none; }
}
.map-sec { padding-block: 24px 0; }

:root[data-type="grotesk"] .map li { font-size: 2.8cqw; letter-spacing: -.035em; line-height: 1.02; }
details.conf { margin-top: 8px; }
details.conf summary { font-weight: 500; }
details.conf .plain li:last-child { margin-bottom: 0; }

/* Intersection diagram */
.venn-wrap { min-width: 0; }
@media (min-width: 900px) {
  .venn-card { grid-template-columns: 1.15fr 1fr 2.2fr; }
  .venn-card .prose { align-self: start; }
}
.venn { display: block; width: 100%; max-width: 640px; height: auto; margin: 0 auto; }
.venn .vc { fill: none; stroke: var(--ink); stroke-width: 1.5; }
.venn .vd { fill: var(--ink); opacity: .14; }
.venn .vt { font: 400 42px var(--serif); letter-spacing: -.02em; fill: var(--ink); }
.venn .vr { font: 500 25px var(--sans); fill: var(--ink); }
.venn .vs { font: 400 21px var(--sans); fill: var(--grey); }
.venn .vbg { fill: var(--paper); stroke: var(--ink); stroke-width: 1.5; }
.venn .vme { font: 400 30px var(--hand); fill: var(--ink); }
@media (max-width: 520px) {
  .venn .vr { font-size: 28px; }
  .venn .vt { font-size: 42px; }
  .venn .vme { font-size: 34px; }
  .venn .vr-l { transform: translate(16px, 24px); }
  .venn .vr-r { transform: translate(-16px, 24px); }
  .venn .vs { display: none; }
}

/* Touch devices: comfortable tap targets without changing the look */
@media (pointer: coarse) {
  .top { padding-block: 12px; }
  .top a { display: inline-block; padding-block: 12px; }
  .top nav { gap: 6px 20px; }
  .details a, .links a, footer a { display: inline-block; padding-block: 10px; margin-block: -10px; }
  .details .pair a { padding-block: 6px; margin-block: 0; }
  summary { padding-block: 10px; min-height: 44px; align-items: center; }
  details { padding-block: 4px; }
  .close-mail { display: inline-block; padding-block: 8px; }
}

/* Phones: drop the empty desktop column and tighten section rhythm */
@media (max-width: 899px) {
  .card > div:empty { display: none; }
  .card { padding-block: 56px; gap: 24px; }
  .hero { padding-block: 32px 56px; min-height: 0; }
}