/* Apertix — site styles
   Palette: ledger paper, viridian ink, reviewer's red pencil (tick marks only). */

:root {
  --ledger: #e8efe9;
  --ledger-line: #c6d4c9;
  --sheet: #f8fbf8;
  --viridian: #0e3a33;
  --viridian-mid: #1d5449;
  --moss: #48645d;
  --pencil: #cf3a2b;

  --display: "Hahmlet Variable", "Noto Serif KR", "Noto Serif CJK KR", "Apple SD Gothic Neo", serif;
  --text: "IBM Plex Sans KR", "Noto Sans KR", "Noto Sans CJK KR", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;

  --gutter: clamp(20px, 5vw, 48px);
  --section: clamp(4.5rem, 10vw, 8.5rem);
}

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

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

body {
  margin: 0;
  background: var(--ledger);
  color: var(--viridian);
  font-family: var(--text);
  font-size: 1.0625rem;
  line-height: 1.75;
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}

html[lang="en"] body {
  line-height: 1.65;
}

h1,
h2,
h3,
p,
ul,
ol,
dl,
dd,
figure {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

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

.sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.skip {
  position: absolute;
  left: var(--gutter);
  top: -4rem;
  z-index: 10;
  padding: 0.5rem 0.9rem;
  background: var(--viridian);
  color: var(--ledger);
}

.skip:focus {
  top: 0.75rem;
}

.wrap {
  width: min(1180px, 100% - 2 * var(--gutter));
  margin-inline: auto;
}

.tick {
  width: 1em;
  height: 1em;
  flex: none;
  fill: none;
  stroke: var(--pencil);
  stroke-width: 2.1;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- Header ---------- */

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--display);
  font-weight: 650;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
  line-height: 1;
  text-decoration: none;
}

.brand svg {
  width: 1.75rem;
  height: 1.75rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.4vw, 2.25rem);
  font-size: 0.95rem;
}

.nav a {
  text-decoration: none;
  padding-block: 0.35rem;
}

.nav a:hover {
  text-decoration: underline;
}

.nav .lang {
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--viridian);
  border-radius: 999px;
}

.nav .lang:hover {
  background: var(--viridian);
  color: var(--ledger);
  text-decoration: none;
}

@media (max-width: 720px) {
  .nav .nav__section {
    display: none;
  }
}

/* ---------- Hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  padding-block: clamp(2.5rem, 6vw, 5.5rem) clamp(3.5rem, 7vw, 6rem);
}

.hero h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.5rem, 6.1vw, 4.9rem);
  line-height: 1.16;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

html[lang="en"] .hero h1 {
  line-height: 1.06;
  letter-spacing: -0.03em;
}

.hero__lede {
  max-width: 34em;
  margin-top: 1.75rem;
  font-size: clamp(1.0625rem, 1.5vw, 1.2rem);
  color: var(--moss);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
  margin-top: 2.25rem;
}

.button {
  display: inline-block;
  padding: 0.85rem 1.5rem;
  background: var(--viridian);
  color: var(--sheet);
  border: 1px solid var(--viridian);
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.3;
  text-decoration: none;
}

.button:hover {
  background: var(--viridian-mid);
  border-color: var(--viridian-mid);
}

.button--onDark {
  background: var(--sheet);
  color: var(--viridian);
  border-color: var(--sheet);
}

.button--onDark:hover {
  background: var(--ledger-line);
  border-color: var(--ledger-line);
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- Aperture ---------- */

.aperture {
  width: 100%;
  max-width: 470px;
  justify-self: end;
}

.aperture__stage {
  position: relative;
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  background: var(--sheet);
  container-type: inline-size;
}

.aperture__record {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 57%;
  margin-inline: auto;
  font-size: clamp(0.69rem, 3.15cqw, 0.95rem);
  line-height: 1.45;
}

.aperture__record h2 {
  padding-bottom: 0.7em;
  margin-bottom: 0.25em;
  border-bottom: 1px solid var(--viridian);
  font-family: var(--display);
  font-weight: 650;
  font-size: 1.12em;
  line-height: 1.35;
}

.aperture__record li {
  display: flex;
  align-items: center;
  gap: 0.6em;
  padding-block: 0.52em;
  border-bottom: 1px solid var(--ledger-line);
}

.aperture__record .tick {
  width: 1.15em;
  height: 1.15em;
}

.aperture__blades {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.aperture__blade {
  fill: url(#blade-metal);
  stroke: #6f988d;
  stroke-width: 0.45;
  stroke-linejoin: round;
}

.aperture__rim {
  fill: none;
  stroke: var(--viridian);
  stroke-width: 2.5;
}

.aperture__control {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.9rem;
  margin-top: 1.4rem;
  font-size: 0.9rem;
}

.aperture__control output {
  min-width: 3.4em;
  text-align: right;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.aperture__hint {
  margin-top: 0.6rem;
  font-size: 0.9rem;
  color: var(--moss);
}

.aperture input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 1.75rem;
  margin: 0;
  background: transparent;
  cursor: pointer;
}

.aperture input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--viridian);
}

.aperture input[type="range"]::-moz-range-track {
  height: 2px;
  background: var(--viridian);
}

.aperture input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 1.375rem;
  height: 1.375rem;
  margin-top: calc(-0.6875rem + 1px);
  border: 2px solid var(--viridian);
  border-radius: 50%;
  background: var(--sheet);
}

.aperture input[type="range"]::-moz-range-thumb {
  width: 1.125rem;
  height: 1.125rem;
  border: 2px solid var(--viridian);
  border-radius: 50%;
  background: var(--sheet);
}

.aperture input[type="range"]:focus-visible {
  outline-offset: 2px;
}

@media (max-width: 900px) {
  .aperture {
    justify-self: start;
    max-width: 420px;
  }
}

/* ---------- Sections ---------- */

.section {
  padding-block: var(--section);
}

.section + .section {
  padding-top: 0;
}

p,
li {
  text-wrap: pretty;
}

.section > .wrap > h2,
.band h2 {
  max-width: 20em;
  font-family: var(--display);
  font-weight: 650;
  font-size: clamp(1.75rem, 3.5vw, 2.7rem);
  line-height: 1.28;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

html[lang="en"] .section > .wrap > h2,
html[lang="en"] .band h2 {
  line-height: 1.16;
}

.section__intro {
  max-width: 36em;
  margin-top: 1.1rem;
  color: var(--moss);
}

/* Work: three rows on ruled ledger lines */

.programme {
  margin-top: clamp(2.25rem, 5vw, 3.75rem);
  border-top: 2px solid var(--viridian);
}

.programme__row {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 5fr) minmax(0, 4fr);
  gap: 1rem clamp(1.5rem, 4vw, 3.5rem);
  padding-block: clamp(1.75rem, 3.5vw, 2.6rem);
  border-bottom: 1px solid var(--ledger-line);
}

.programme__row h3 {
  font-family: var(--display);
  font-weight: 650;
  font-size: clamp(1.3rem, 2.1vw, 1.65rem);
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.programme__row p {
  color: var(--moss);
}

.programme__row li {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding-block: 0.3rem;
  font-size: 0.97rem;
  line-height: 1.55;
}

.programme__row .tick {
  position: relative;
  top: 0.14em;
}

.footnote {
  max-width: 44em;
  margin-top: 1.5rem;
  font-size: 0.93rem;
  color: var(--moss);
}

@media (max-width: 860px) {
  .programme__row {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Why: the one dark band */

.band {
  padding-block: var(--section);
  background: var(--viridian);
  color: var(--ledger);
}

.band :focus-visible {
  outline-color: var(--ledger);
}

.band__grid {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: start;
}

.band__body p {
  max-width: 33em;
  margin-top: 1.4rem;
  color: #c3d6cc;
}

.questions {
  border-top: 1px solid #3a6a5f;
}

.questions li {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding-block: 1.3rem;
  border-bottom: 1px solid #3a6a5f;
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.15rem, 1.9vw, 1.45rem);
  line-height: 1.45;
  letter-spacing: -0.015em;
}

.questions .tick {
  position: relative;
  top: 0.12em;
  stroke: #ff7a66;
}

.questions__label {
  margin-bottom: 0.9rem;
  font-size: 0.93rem;
  color: #c3d6cc;
}

@media (max-width: 860px) {
  .band__grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Process: a real sequence, so it is numbered */

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2rem clamp(1.25rem, 3vw, 2.5rem);
  margin-top: clamp(2.25rem, 5vw, 3.75rem);
  counter-reset: step;
}

.steps li {
  padding-top: 1.1rem;
  border-top: 2px solid var(--viridian);
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  display: block;
  font-family: var(--display);
  font-weight: 300;
  font-size: 2.6rem;
  line-height: 1;
  font-variant-numeric: lining-nums;
}

.steps h3 {
  margin-top: 0.9rem;
  font-family: var(--display);
  font-weight: 650;
  font-size: 1.2rem;
  line-height: 1.4;
}

.steps p {
  margin-top: 0.45rem;
  font-size: 0.97rem;
  color: var(--moss);
}

@media (max-width: 900px) {
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .steps {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Company */

.about {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(2.5rem, 6vw, 6rem);
  margin-top: clamp(2.25rem, 5vw, 3.75rem);
  align-items: start;
}

.entry {
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--sheet);
  border-left: 3px solid var(--viridian);
}

.entry dt {
  font-family: var(--display);
  font-weight: 650;
  font-size: clamp(1.9rem, 3.4vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.entry .entry__say {
  margin-top: 0.5rem;
  font-size: 0.93rem;
  color: var(--moss);
}

.entry .entry__sense {
  margin-top: 1rem;
}

.about__body p + p {
  margin-top: 1.2rem;
}

.about__body p {
  max-width: 34em;
}

@media (max-width: 860px) {
  .about {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Contact */

.contact {
  padding-block: var(--section);
  border-top: 2px solid var(--viridian);
}

.contact h2 {
  max-width: 16em;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2rem, 4.6vw, 3.6rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

html[lang="en"] .contact h2 {
  line-height: 1.08;
}

.contact p {
  max-width: 34em;
  margin-top: 1.25rem;
  color: var(--moss);
}

.contact__mail {
  font-weight: 600;
}

/* Footer */

.colophon {
  padding-block: 1.75rem 2.5rem;
  border-top: 1px solid var(--ledger-line);
  font-size: 0.9rem;
  color: var(--moss);
}

.colophon .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 2rem;
}

/* 404 */

.lost {
  min-height: 72vh;
  display: grid;
  align-content: center;
  gap: 1.25rem;
  padding-block: var(--section);
}

.lost svg {
  width: 4.5rem;
  height: 4.5rem;
}

.lost h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.lost p {
  max-width: 32em;
  color: var(--moss);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media print {
  .aperture__blades,
  .aperture__control,
  .aperture__hint,
  .nav {
    display: none;
  }
}