@font-face {
  font-family: "Pretendard Variable";
  src: url("/fonts/PretendardVariable.woff2") format("woff2");
  font-style: normal;
  font-weight: 45 920;
  font-display: swap;
}

:root {
  /* 01_브랜드 / Color / Light / Base */
  --base-white: #ffffff;
  --base-black: #000000;
  --base-grey-50: #f9fafb;
  --base-grey-100: #f2f4f6;
  --base-grey-200: #e5e8eb;
  --base-grey-300: #d1d6db;
  --base-grey-500: #8b95a1;
  --base-grey-600: #6b7684;
  --base-grey-700: #4e5968;
  --base-grey-800: #333d4b;
  --base-grey-900: #191f28;
  --base-blue-50: #e8f3ff;
  --base-blue-100: #c9e2ff;
  --base-blue-800: #1957c2;
  --base-blue-900: #194aa6;
  --ink: var(--base-grey-900);
  --muted: var(--base-grey-600);
  --faint: var(--base-grey-500);
  --line: var(--base-grey-300);
  --soft-line: var(--base-grey-200);
  --paper: var(--base-grey-50);
  --accent: var(--base-blue-800);
  --gutter: clamp(15px, 4vw, 154px);
  --header-height: 62px;
  --footer-height: 76px;
  --side-rail-width: min(100%, 480px);
  --condensed: "Pretendard Variable", Pretendard, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) - 1px);
  background: var(--paper);
  color-scheme: light;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    "Pretendard Variable",
    Pretendard,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button,
a {
  color: inherit;
  font: inherit;
}

a {
  text-decoration: none;
}

button {
  border: 0;
}

img,
svg {
  display: block;
  max-width: 100%;
}

::selection {
  background: var(--base-blue-800);
  color: var(--base-white);
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 5px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  transform: translateY(-160%);
  background: var(--accent);
  color: var(--base-white);
  font-size: 13px;
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-shell {
  width: 100%;
}

.section {
  width: calc(100% - var(--gutter) - var(--gutter));
  margin-inline: auto;
}

.topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  height: var(--header-height);
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.menu-toggle {
  display: none;
}

#primary-nav {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-items: center;
}

#primary-nav a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-self: center;
  padding: 10px 8px;
  font-family: var(--condensed);
  font-size: 14px;
  font-stretch: condensed;
  font-weight: 600;
  letter-spacing: 0.15em;
  line-height: 1;
  transition: color 180ms ease;
}

#primary-nav a:first-child {
  justify-self: start;
}

#primary-nav a:last-child {
  justify-self: end;
}

#primary-nav a:hover {
  color: var(--accent);
}

#primary-nav a:focus-visible {
  outline: 0;
  text-decoration-line: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.editorial-grid {
  display: grid;
  grid-template-columns: clamp(240px, 24vw, 540px) minmax(0, 1fr);
}

.section-name {
  margin: 0;
  font-family: var(--condensed);
  font-size: clamp(38px, 3.35vw, 52px);
  font-stretch: condensed;
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 0.95;
}

.section-count {
  margin: 13px 0 0;
  color: var(--muted);
  font-family: var(--condensed);
  font-size: 10px;
  font-stretch: condensed;
  font-weight: 600;
  letter-spacing: 0.16em;
  line-height: 1.4;
}

.eyebrow {
  margin: 0;
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.16em;
  line-height: 1.5;
  text-transform: uppercase;
}

.bio-hero {
  position: relative;
  display: grid;
  min-height: calc(100svh - var(--header-height));
  align-items: stretch;
  scroll-margin-top: 1px;
}

.bio-hero > .section-aside {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--paper);
}

.hero-identity {
  position: relative;
  display: flex;
  width: min(100%, 480px);
  max-width: 100%;
  min-width: 0;
  aspect-ratio: 3 / 2;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: clamp(16px, 2.5vw, 32px);
}

.hero-logo {
  display: block;
  width: 114%;
  max-width: none;
  height: auto;
  margin: -8% -7%;
}

.hero-wordmark {
  width: 100%;
  margin: 0;
  overflow: hidden;
  mix-blend-mode: multiply;
}

.hero-statement {
  -webkit-user-select: none;
  user-select: none;
  width: max-content;
  max-width: 100%;
  margin: -8px 0 0;
  font-size: clamp(20px, 2.6vw, 38px);
  font-weight: 650;
  letter-spacing: -0.045em;
  line-height: 1.25;
  word-break: keep-all;
}

.hero-statement {
  color: var(--base-black);
}

.hero-description {
  max-width: 48ch;
  margin: 0;
  color: var(--muted);
  font-size: clamp(14px, 1.1vw, 18px);
  line-height: 1.7;
  word-break: keep-all;
  -webkit-user-select: none;
  user-select: none;
}

@media (max-width: 1099px) {
  .bio-hero > .section-aside {
    min-height: clamp(320px, 52svh, 460px);
  }

  .hero-identity {
    margin-inline: auto;
  }
}

@media (min-width: 1100px) {
  :root {
    --side-rail-width: clamp(460px, 33vw, 560px);
  }

  .bio-hero {
    grid-template-columns: minmax(0, 1fr) var(--side-rail-width);
    padding: clamp(56px, 8svh, 80px) 0 clamp(72px, 10svh, 112px);
  }

  .hero-identity {
    width: min(100%, 900px);
  }
}

@media (min-width: 1100px) and (hover: hover) and (pointer: fine) {
  .career-hover-ready .bio-career-details summary {
    cursor: default;
  }
}

.works-section,
.channels-section,
.contact-section {
  border-top: 1px solid var(--line);
  padding: clamp(56px, 8svh, 80px) 0 clamp(80px, 12svh, 144px);
}

.section-aside {
  min-width: 0;
  padding-right: clamp(28px, 3vw, 64px);
}

.project-grid {
  display: grid;
  width: min(100%, 1200px);
  min-width: 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(36px, 3.5vw, 48px) clamp(16px, 2vw, 24px);
  align-self: start;
  justify-self: end;
}

.project-card {
  --slice-start: color-mix(in srgb, var(--project-gradient-start) 78%, white);
  --slice-end: color-mix(in srgb, var(--project-gradient-end) 68%, white);
  display: block;
  min-width: 0;
}

.project-media {
  position: relative;
  display: grid;
  overflow: hidden;
  aspect-ratio: 2 / 1;
  place-items: center;
  isolation: isolate;
  --project-grid-line: color-mix(in srgb, var(--project-ink) 14%, transparent);
  background: var(--project-surface);
  color: var(--project-ink);
  transition: color 180ms ease;
}

.project-media::before {
  position: absolute;
  z-index: 1;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--project-grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--project-grid-line) 1px, transparent 1px);
  background-size: calc(100% / 9) calc(100% / 5);
  box-shadow: inset -1px -1px 0 var(--project-grid-line);
  content: "";
  pointer-events: none;
}

.project-media::after {
  position: absolute;
  z-index: 0;
  inset: 0;
  background: linear-gradient(
    110deg,
    transparent 0 36%,
    color-mix(in srgb, var(--slice-start, var(--project-gradient-start)) 58%, white) 36% 41%,
    var(--slice-start, var(--project-gradient-start)) 41% 46%,
    color-mix(
        in srgb,
        var(--slice-start, var(--project-gradient-start)) 48%,
        var(--slice-end, var(--project-gradient-end))
      )
      46% 51%,
    var(--slice-end, var(--project-gradient-end)) 51% 55%,
    transparent 55% 100%
  );
  background-size: 300% 100%;
  background-position: -5% 50%;
  content: "";
  pointer-events: none;
}

.project-card:hover .project-media::after,
.project-card:focus-visible .project-media::after {
  animation: poster-slice-sweep 700ms cubic-bezier(0.45, 0, 0.2, 1) both;
}

@keyframes poster-slice-sweep {
  from {
    background-position: -5% 50%;
  }
  to {
    background-position: 100% 50%;
  }
}

/* Portfolio artwork keeps each product's palette; the site UI uses Base colors. */
.project-card-frontron {
  --project-surface: #dceaff;
  --project-ink: #1556ba;
  --project-gradient-start: #4e95ff;
  --project-gradient-end: #1573ff;
  --project-action: #237bff;
}

.project-card-minicast {
  --project-surface: #def3ff;
  --project-ink: #1673aa;
  --project-gradient-start: #40b1fd;
  --project-gradient-end: #237af5;
  --project-action: #1685e5;
}

.project-card-chatview {
  --project-surface: #defcf3;
  --project-ink: #087965;
  --project-gradient-start: #41e4c3;
  --project-gradient-end: #00bfa0;
  --project-action: #00ad8f;
}

.project-card-flick {
  --project-surface: #fff1e8;
  --project-ink: #b94019;
  --project-gradient-start: #ff9252;
  --project-gradient-end: #ff3f15;
  --project-action: #ff5d00;
}

.project-card-interview {
  --project-surface: #dbeafe;
  --project-ink: #111111;
  --project-gradient-start: #9fc5ff;
  --project-gradient-end: #5294ff;
  --project-action: #5294ff;
}

.project-card-devnote {
  --project-surface: #e6edff;
  --project-ink: #2345a0;
  --project-gradient-start: #7298ff;
  --project-gradient-end: #2455de;
  --project-action: #2455de;
}

.project-card-inst {
  --project-surface: #dbeafe;
  --project-ink: #0b1020;
  --project-gradient-start: #bed4f3;
  --project-gradient-end: #5294ff;
  --project-action: #5294ff;
}

.project-card:is(:hover, :focus-visible) .project-media-frontron {
  color: #0b367d;
}

.project-card:is(:hover, :focus-visible) .project-media-minicast {
  color: #0b4164;
}

.project-card:is(:hover, :focus-visible) .project-media-chatview {
  color: #085544;
}

.project-card:is(:hover, :focus-visible) .project-media-flick {
  color: #842b0f;
}

/* Poster hover pairs a bright brand-color fill with white text. */
.project-card .project-media {
  transition:
    background-color 450ms ease,
    color 220ms ease;
}

.project-card:is(:hover, :focus-visible) .project-media {
  background-color: color-mix(in srgb, var(--project-action) 65%, white);
  color: #fff;
  --project-grid-line: rgb(255 255 255 / 20%);
}

:is(.works-section, .channels-section) .project-card:is(:hover, :focus-visible) .poster-title {
  background: none;
  color: #fff;
  -webkit-text-fill-color: #fff;
}

.project-symbol {
  z-index: 1;
  width: clamp(64px, 24%, 96px);
}

.poster-kicker,
.poster-title {
  position: absolute;
  z-index: 2;
  left: 18px;
  font-family: var(--condensed);
  font-stretch: condensed;
  font-weight: 600;
  line-height: 1;
}

.poster-kicker {
  top: 17px;
  font-size: 10px;
  letter-spacing: 0.16em;
}

.poster-title {
  bottom: 15px;
  font-size: clamp(18px, 1.65vw, 28px);
  letter-spacing: -0.035em;
}

.project-card:is(
    .project-card-frontron,
    .project-card-minicast,
    .project-card-chatview,
    .project-card-flick
  )
  .poster-title {
  background: linear-gradient(90deg, var(--project-gradient-start), var(--project-gradient-end));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  letter-spacing: -0.05em;
}

.interview-mark {
  z-index: 1;
  font-family: var(--condensed);
  font-size: clamp(72px, 8vw, 128px);
  font-stretch: condensed;
  font-weight: 300;
  line-height: 1;
}

.project-caption {
  display: grid;
  min-width: 0;
  --project-arrow-size: clamp(32px, 2.1vw, 44px);
  grid-template-columns: 30px minmax(0, 1fr) var(--project-arrow-size);
  gap: 12px;
  padding: 12px 0 0;
  align-items: start;
}

.project-number {
  color: var(--muted);
  font-family: var(--condensed);
  font-stretch: condensed;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.project-number {
  padding-top: 4px;
  font-size: 10px;
  line-height: 1;
}

.project-caption h3 {
  margin: 0;
  font-family: var(--condensed);
  font-size: 20px;
  font-stretch: condensed;
  font-weight: 600;
  letter-spacing: 0.045em;
  line-height: 1;
}

.project-kind {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 11px;
  font-weight: 450;
  letter-spacing: -0.01em;
  line-height: 1.5;
  word-break: keep-all;
}

.project-arrow {
  position: relative;
  display: grid;
  width: 100%;
  aspect-ratio: 1;
  place-items: center;
  overflow: hidden;
  isolation: isolate;
  border-radius: 50%;
  background: transparent;
  color: var(--project-action);
  line-height: 1;
  transition:
    color 220ms ease,
    transform 220ms ease;
}

.project-arrow::before {
  position: absolute;
  inset: -1px;
  background: var(--project-action);
  clip-path: circle(0 at 50% 50%);
  content: "";
  transition: clip-path 450ms cubic-bezier(0.22, 1, 0.36, 1);
}

.project-arrow svg {
  position: relative;
  width: 48%;
  aspect-ratio: 1;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.25;
}

.project-arrow svg path {
  transition: transform 450ms cubic-bezier(0.785, 0.135, 0.15, 0.86);
}

.project-arrow svg path:first-child {
  transform: translate(-16px, 16px);
}

.project-card:hover .project-arrow,
.project-card:focus-visible .project-arrow {
  color: var(--base-white);
  transform: translate(2px, -2px);
}

.project-card:hover .project-arrow::before,
.project-card:focus-visible .project-arrow::before {
  clip-path: circle(100% at 50% 50%);
}

.project-card:hover .project-arrow svg path:first-child,
.project-card:focus-visible .project-arrow svg path:first-child {
  transform: translate(0, 0);
}

.project-card:hover .project-arrow svg path:last-child,
.project-card:focus-visible .project-arrow svg path:last-child {
  transform: translate(16px, -16px);
}

.works-section,
.channels-section {
  min-height: calc(100svh - var(--header-height) + 1px);
}

.channels-section {
  padding-bottom: clamp(96px, 14svh, 168px);
}

.channel-github {
  --project-surface: #e9edf1;
  --project-ink: #24292f;
  --project-gradient-start: #aab2bc;
  --project-gradient-end: #24292f;
  --project-action: #24292f;
}
.channel-youtube {
  --project-surface: #ffe5eb;
  --project-ink: #a41132;
  --project-gradient-start: #ff708c;
  --project-gradient-end: #ff0033;
  --project-action: #ff0033;
}
.channel-inflearn {
  --project-surface: #def9e9;
  --project-ink: #08633e;
  --project-gradient-start: #67dfa4;
  --project-gradient-end: #00c471;
  --project-action: #00a960;
}
.channel-grid .poster-title {
  background: linear-gradient(90deg, var(--project-gradient-start), var(--project-gradient-end));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  letter-spacing: -0.05em;
}
.channel-grid .channel-logo {
  object-fit: contain;
  height: auto;
}

.contact-section {
  min-height: calc(100svh - var(--header-height) - var(--footer-height) + 1px);
  padding: clamp(24px, min(2.5vw, 4svh), 96px) 0 0;
}

.contact-content {
  width: var(--side-rail-width);
  min-width: 0;
  align-self: start;
  justify-self: end;
}

.contact-form {
  display: grid;
  min-width: 0;
  gap: clamp(10px, min(1.4vw, 1.6svh), 54px);
}

.contact-honeypot {
  display: none;
}

.contact-fields {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(10px, min(1.4vw, 1.6svh), 54px);
}

.contact-field {
  display: grid;
  min-width: 0;
  gap: clamp(6px, min(0.625vw, 1svh), 24px);
}

.contact-field-label {
  margin: 0;
  color: var(--ink);
  font-family: var(--condensed);
  font-size: clamp(13px, min(0.6771vw, 1.5svh), 26px);
  font-stretch: condensed;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1;
}

.contact-required {
  color: var(--accent);
}

.contact-optional {
  margin-left: 6px;
  color: var(--muted);
  font-size: 0.78em;
  font-weight: 500;
  letter-spacing: 0.1em;
}

.contact-field input,
.contact-field textarea {
  width: 100%;
  min-width: 0;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 2px;
  outline-offset: 3px;
  background: var(--base-white);
  color: var(--ink);
  font: inherit;
  font-size: clamp(14px, min(0.78125vw, 1.75svh), 30px);
  line-height: 1.6;
  transition:
    border-color 180ms ease,
    background-color 180ms ease;
}

.contact-field input {
  min-height: clamp(48px, min(3.75vw, 7svh), 144px);
  padding: 0 20px;
}

.contact-field textarea {
  height: clamp(108px, min(10.4167vw, 18svh), 400px);
  min-height: 108px;
  padding: 18px 20px;
  resize: vertical;
}

.contact-field input:hover,
.contact-field textarea:hover {
  border-color: var(--muted);
}

.contact-field input:focus-visible,
.contact-field textarea:focus-visible {
  border-color: var(--ink);
  background: var(--base-white);
}

.contact-field input::placeholder,
.contact-field textarea::placeholder {
  color: var(--faint);
  opacity: 1;
}

.contact-submit {
  display: grid;
  width: 100%;
  min-width: 0;
  min-height: clamp(52px, min(3.5417vw, 7svh), 136px);
  place-items: center;
  padding: 16px 24px;
  background: var(--accent);
  color: var(--base-white);
  cursor: pointer;
  font-family: var(--condensed);
  font-size: 14px;
  font-stretch: condensed;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1;
  transition: background-color 180ms ease;
}

.contact-submit:hover {
  background: var(--base-blue-900);
}

.footer {
  display: flex;
  min-height: var(--footer-height);
  align-items: center;
  justify-content: flex-end;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--condensed);
  font-size: 11px;
  font-stretch: condensed;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.footer p {
  margin: 0;
}

/* Shared 404 page */
.not-found-shell {
  min-height: 100svh;
}

.contact-sent {
  display: none;
  min-width: 0;
  min-height: min(520px, 58svh);
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding-block: clamp(32px, 5vw, 72px);
}

.contact-sent:target {
  display: flex;
}

.contact-sent:target + .contact-form {
  display: none;
}

.contact-sent-kicker {
  margin: 0 0 clamp(24px, 3vw, 48px);
  color: var(--muted);
  font-family: var(--condensed);
  font-size: 12px;
  font-stretch: condensed;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.contact-sent-title {
  margin: 0;
  font-family: var(--condensed);
  font-size: clamp(56px, min(8vw, 12svh), 128px);
  font-stretch: condensed;
  font-weight: 600;
  letter-spacing: -0.065em;
  line-height: 0.8;
}

.contact-sent-copy {
  max-width: 560px;
  margin: clamp(42px, 5vw, 72px) 0 0;
  font-size: clamp(16px, 1.35vw, 22px);
  line-height: 1.8;
}

.contact-sent-link {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  gap: 10px;
  margin-top: clamp(28px, 4vw, 52px);
  border-bottom: 1px solid var(--ink);
  font-family: var(--condensed);
  font-size: 14px;
  font-stretch: condensed;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.contact-sent-link:hover,
.contact-sent-link:focus-visible {
  border-bottom-color: transparent;
}

.not-found-page {
  display: flex;
  min-height: 100svh;
  max-width: 760px;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding-block: 72px;
}

.not-found-brand {
  display: block;
  width: min(340px, 80%);
  margin-bottom: 40px;
  mix-blend-mode: multiply;
}

.not-found-brand img {
  display: block;
  width: 100%;
  height: auto;
}

.not-found-page h1 {
  margin: 20px 0 0;
  font-size: clamp(32px, 5vw, 64px);
  letter-spacing: -0.06em;
  line-height: 1.2;
  text-wrap: balance;
  word-break: keep-all;
}

.not-found-page > p:not(.eyebrow) {
  max-width: 520px;
  margin: 28px 0 0;
  color: var(--base-grey-700);
  font-size: 15px;
  line-height: 1.8;
  overflow-wrap: anywhere;
  word-break: keep-all;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  font-size: 13px;
  font-weight: 650;
}

.button-primary {
  margin-top: 32px;
  background: var(--accent);
  color: var(--base-white);
}

.bio-index {
  width: var(--side-rail-width);
  min-width: 0;
  align-self: start;
  justify-self: end;
  margin: 0 0 0 auto;
  --timeline-inset: 28px;
  padding: 0 0 0 var(--timeline-inset);
  display: grid;
  gap: 0;
  list-style: none;
}

.bio-index-year,
.bio-index-company,
.bio-index-role {
  min-width: 0;
  font-family: var(--condensed);
  font-weight: 400;
  overflow-wrap: anywhere;
}

.bio-index .bio-index-year {
  grid-area: year;
  color: var(--muted);
  white-space: nowrap;
  align-self: end;
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.06em;
}

.bio-index .bio-index-company {
  grid-area: company;
  margin: 0;
  font-size: clamp(15px, 1.05vw, 18px);
  word-break: keep-all;
  width: fit-content;
  background: linear-gradient(90deg, var(--career-title-start), var(--career-title-end));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.025em;
}

.bio-index .bio-index-role {
  grid-area: role;
  margin: 0;
  color: var(--muted);
  letter-spacing: 0;
  word-break: keep-all;
  font-size: clamp(12px, 0.85vw, 15px);
  line-height: 1.5;
}

.bio-career-details {
  width: 100%;
  min-width: 0;
  interpolate-size: allow-keywords;
}

.bio-career-details::details-content {
  block-size: 0;
  overflow: hidden;
  opacity: 0;
  transition:
    block-size 620ms cubic-bezier(0.37, 0, 0.63, 1),
    content-visibility 620ms,
    opacity 360ms ease 160ms;
  transition-behavior: allow-discrete;
}

.bio-career-details[open]::details-content {
  block-size: auto;
  opacity: 1;
  transition:
    block-size 620ms cubic-bezier(0.37, 0, 0.63, 1),
    content-visibility 620ms,
    opacity 360ms ease 100ms;
}

.bio-career-details summary::-webkit-details-marker {
  display: none;
}

.bio-career-company-line {
  display: flex;
  min-width: 0;
  grid-area: company;
  align-items: center;
  gap: 7px;
}

.bio-career-company-line .bio-index-company {
  flex: 0 1 auto;
}

.bio-career-toggle {
  display: block;
  width: 18px;
  flex: 0 0 auto;
  margin-left: auto;
  color: var(--ink);
  font-family: var(--condensed);
  font-size: 0;
  line-height: 1;
  text-align: center;
}

.bio-career-toggle::before {
  content: "+";
  font-size: 18px;
}

.bio-career-details[open] .bio-career-toggle::before {
  content: "−";
}

.bio-index .bio-career-panel {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 8px;
  padding: 14px 0 5px;
  border-top: 1px solid var(--line);
  transform: translateY(-5px);
  transition: transform 620ms cubic-bezier(0.37, 0, 0.63, 1);
  margin: 4px 0 0;
  padding-block: 18px;
}

.bio-career-details[open] .bio-career-panel {
  transform: translateY(0);
}

.bio-career-meta,
.bio-career-list,
.bio-career-result-grid {
  margin: 0;
}

.bio-career-columns {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2vw, 32px);
}

.bio-career-section {
  min-width: 0;
}

.bio-career-section h3 {
  margin: 0 0 9px;
  color: var(--muted);
  font-family: var(--condensed);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.12em;
  line-height: 1;
}

.bio-career-list,
.bio-career-result-grid {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr);
  gap: 9px 14px;
  padding: 0;
  list-style: none;
}

.bio-career-list > li,
.bio-career-result-grid > li {
  min-width: 0;
  padding-left: 9px;
  border-left: 1px solid var(--ink);
}

.bio-career-list strong,
.bio-career-list span,
.bio-career-result-grid strong,
.bio-career-result-grid span {
  display: block;
  min-width: 0;
  font-size: 12px;
  line-height: 1.45;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.bio-career-list strong,
.bio-career-result-grid strong {
  font-weight: 600;
}

.bio-career-list span,
.bio-career-result-grid span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
}

.bio-career-meta {
  padding-top: 10px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--condensed);
  font-size: 11px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.bio-career-meta span {
  margin-right: 10px;
  color: var(--ink);
  letter-spacing: 0.08em;
}
.bio-index-item {
  position: relative;
  min-width: 0;
  padding-bottom: 22px;
}
.bio-index-item::before {
  position: absolute;
  top: 42px;
  left: calc(-1 * var(--timeline-inset));
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--career-title-end);
  content: "";
}
.bio-index-item:not(:last-child)::after {
  position: absolute;
  top: 58px;
  bottom: -34px;
  left: calc(3px - var(--timeline-inset));
  width: 2px;
  background: var(--line);
  content: "";
}
.bio-index-item:last-child {
  padding-bottom: 0;
}
.bio-career-header {
  display: grid;
  grid-template-columns: clamp(76px, 6vw, 112px) minmax(0, 1fr);
  grid-template-areas: "media year" "media company" "media role";
  column-gap: clamp(14px, 1.3vw, 24px);
  row-gap: 5px;
  align-content: center;
  min-height: clamp(94px, 5.6vw, 104px);
  padding: 8px 0;
  list-style: none;
}
.bio-career-details summary {
  cursor: pointer;
}
.career-media {
  grid-area: media;
  width: 100%;
  height: 100%;
  min-height: 76px;
  aspect-ratio: auto;
}
.career-media::before {
  background-size: 25% 25%;
}
.career-logo {
  position: relative;
  z-index: 2;
  width: 70%;
  max-height: 64px;
  object-fit: contain;
}
.career-epic .career-logo {
  width: 55%;
  mix-blend-mode: multiply;
}

.career-media {
  transition:
    background-color 450ms ease,
    color 220ms ease;
}
.bio-index-item:is(:hover, :focus-within) .career-media {
  background-color: color-mix(in srgb, var(--career-title-end) 65%, white);
  color: #fff;
  --project-grid-line: rgb(255 255 255 / 20%);
}

.bio-index-item:is(:hover, :focus-within) .career-media::after {
  animation: poster-slice-sweep 700ms cubic-bezier(0.45, 0, 0.2, 1) both;
}
.career-epic {
  --career-title-start: #9da8b6;
  --career-title-end: #667486;
  --project-surface: #e9edf1;
  --project-ink: #252a30;
  --project-gradient-start: var(--career-title-start);
  --project-gradient-end: var(--career-title-end);
}
.career-education {
  --career-title-start: #36c8ed;
  --career-title-end: #248cff;
  --project-surface: #e0f3fb;
  --project-ink: #075895;
  --project-gradient-start: var(--career-title-start);
  --project-gradient-end: var(--career-title-end);
}
.career-health {
  --career-title-start: #ff9252;
  --career-title-end: #ff3f15;
  --project-surface: #fff0e7;
  --project-ink: #c74d1e;
  --project-gradient-start: var(--career-title-start);
  --project-gradient-end: var(--career-title-end);
}
.career-business {
  --career-title-start: #64b3f4;
  --career-title-end: #2b88ed;
  --project-surface: #e4eff9;
  --project-ink: #0b558d;
  --project-gradient-start: var(--career-title-start);
  --project-gradient-end: var(--career-title-end);
}
.career-kriss {
  --career-title-start: #ffad55;
  --career-title-end: #ff721e;
  --project-surface: #fff0df;
  --project-ink: #b85c1e;
  --project-gradient-start: var(--career-title-start);
  --project-gradient-end: var(--career-title-end);
}
.career-kisti {
  --career-title-start: #3cc9ed;
  --career-title-end: #129be8;
  --project-surface: #dff2fb;
  --project-ink: #007dac;
  --project-gradient-start: var(--career-title-start);
  --project-gradient-end: var(--career-title-end);
}

.career-education .career-logo,
.career-health .career-logo,
.career-business .career-logo {
  width: 64%;
  mix-blend-mode: multiply;
}

.career-logo-mosaic {
  aspect-ratio: 1;
}

@media (min-width: 1100px) and (max-width: 1599px) {
  .project-grid {
    width: min(100%, 900px);
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 1099px) {
  .bio-hero {
    align-content: start;
    padding: 40px 0 88px;
  }

  .bio-index {
    align-self: start;
  }

  .editorial-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .section-aside {
    padding-right: 0;
    margin-bottom: 40px;
  }

  .contact-section > .section-aside {
    margin-bottom: clamp(12px, 2svh, 20px);
  }

  .project-grid {
    width: min(100%, 760px);
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
    justify-content: end;
  }
}

@media (min-width: 901px) and (max-width: 1099px) {
  .contact-section {
    grid-template-columns: clamp(240px, 24vw, 540px) minmax(0, 1fr);
  }

  .contact-section > .section-aside {
    padding-right: clamp(28px, 3vw, 64px);
    margin-bottom: 0;
  }
}

@media (min-width: 1920px) {
  :root {
    --side-rail-width: max(460px, min(clamp(560px, 29vw, 1120px), 62svh));
    --header-height: min(clamp(62px, 3.2292vw, 124px), 6.8svh);
    --footer-height: min(clamp(76px, 3.9583vw, 152px), 8.35svh);
    --wide-row: min(clamp(57px, 2.96875vw, 114px), 6.2svh);
    --wide-item-pad: min(clamp(8px, 0.4167vw, 16px), 0.88svh);
    --wide-year-track: min(clamp(92px, 4.7917vw, 184px), 10.1svh);
    --wide-column-gap: min(clamp(24px, 1.25vw, 48px), 2.64svh);
    --wide-row-gap: min(clamp(3px, 0.15625vw, 6px), 0.33svh);
  }

  #primary-nav a {
    min-height: min(clamp(44px, 2.2917vw, 88px), 4.83svh);
    padding: min(clamp(10px, 0.5208vw, 20px), 1.1svh) min(clamp(8px, 0.4167vw, 16px), 0.88svh);
    font-size: min(clamp(14px, 0.7292vw, 28px), 1.54svh);
  }

  .editorial-grid {
    grid-template-columns:
      min(clamp(461px, 24vw, 922px), 50.6svh)
      minmax(0, 1fr);
  }

  .section-name {
    font-size: min(clamp(52px, 2.7083vw, 104px), 5.71svh);
  }

  .section-count {
    margin-top: min(clamp(13px, 0.6771vw, 26px), 1.43svh);
    font-size: min(clamp(10px, 0.5208vw, 20px), 1.1svh);
  }

  .eyebrow {
    font-size: min(clamp(11px, 0.5729vw, 22px), 1.21svh);
  }

  .bio-hero {
    grid-template-columns:
      minmax(0, 1fr)
      var(--side-rail-width);
    padding: min(clamp(80px, 4.1667vw, 160px), 8svh) 0 min(clamp(96px, 5vw, 192px), 10svh);
  }

  .hero-identity {
    width: min(100%, clamp(900px, 46.875vw, 1800px), 98.8svh);
  }

  .bio-index-year {
    font-size: min(clamp(12px, 0.625vw, 24px), 1.32svh);
  }

  .bio-index .bio-index-company {
    font-size: max(13px, min(clamp(18px, 0.9375vw, 36px), 1.98svh));
  }

  .bio-index-role {
    font-size: max(13px, min(clamp(18px, 0.9375vw, 36px), 1.98svh));
  }

  .bio-career-company-line {
    gap: clamp(7px, 0.3646vw, 14px);
  }

  .bio-career-toggle {
    width: clamp(18px, 0.9375vw, 36px);
  }

  .bio-career-toggle::before {
    font-size: max(13px, min(clamp(18px, 0.9375vw, 36px), 1.98svh));
  }

  .bio-career-panel {
    gap: clamp(16px, 0.8333vw, 32px);
    margin-top: clamp(8px, 0.4167vw, 16px);
    padding: clamp(14px, 0.7292vw, 28px) 0 clamp(5px, 0.2604vw, 10px);
    transform: translateY(clamp(-10px, -0.2604vw, -5px));
  }

  .bio-career-columns {
    gap: clamp(32px, 1.6667vw, 64px);
  }

  .bio-career-section h3 {
    margin-bottom: clamp(9px, 0.46875vw, 18px);
    font-size: clamp(10px, 0.5208vw, 20px);
  }

  .bio-career-list,
  .bio-career-result-grid {
    gap: clamp(9px, 0.46875vw, 18px) clamp(14px, 0.7292vw, 28px);
  }

  .bio-career-list > li,
  .bio-career-result-grid > li {
    padding-left: clamp(9px, 0.46875vw, 18px);
  }

  .bio-career-list strong,
  .bio-career-result-grid strong {
    font-size: clamp(12px, 0.625vw, 24px);
  }

  .bio-career-list span,
  .bio-career-result-grid span {
    margin-top: clamp(3px, 0.15625vw, 6px);
    font-size: clamp(11px, 0.5729vw, 22px);
  }

  .bio-career-meta {
    padding-top: clamp(10px, 0.5208vw, 20px);
    font-size: clamp(11px, 0.5729vw, 22px);
  }

  .bio-career-meta span {
    margin-right: clamp(10px, 0.5208vw, 20px);
  }

  .works-section,
  .channels-section {
    padding: min(clamp(80px, 4.1667vw, 160px), 8svh) 0 min(clamp(144px, 7.5vw, 288px), 12svh);
  }

  .section-aside {
    padding-right: 3vw;
  }

  .project-grid {
    width: min(100%, clamp(1200px, 62.5vw, 2400px));
    gap: clamp(48px, 2.5vw, 96px) clamp(24px, 1.25vw, 48px);
  }

  .project-symbol {
    width: 24%;
    max-width: none;
  }

  .poster-kicker,
  .poster-title {
    left: clamp(18px, 0.9375vw, 36px);
  }

  .poster-kicker {
    top: clamp(17px, 0.8854vw, 34px);
    font-size: clamp(10px, 0.5208vw, 20px);
  }

  .poster-title {
    bottom: clamp(15px, 0.78125vw, 30px);
    font-size: clamp(28px, 1.4583vw, 56px);
  }

  .interview-mark {
    font-size: clamp(128px, 6.6667vw, 256px);
  }

  .project-caption {
    grid-template-columns:
      clamp(30px, 1.5625vw, 60px)
      minmax(0, 1fr)
      var(--project-arrow-size);
    gap: clamp(12px, 0.625vw, 24px);
    padding-top: clamp(12px, 0.625vw, 24px);
  }

  .project-number {
    padding-top: clamp(4px, 0.2083vw, 8px);
    font-size: clamp(10px, 0.5208vw, 20px);
  }

  .project-caption h3 {
    font-size: clamp(20px, 1.0417vw, 40px);
  }

  .project-kind {
    margin-top: clamp(10px, 0.5208vw, 20px);
    font-size: clamp(11px, 0.5729vw, 22px);
  }

  .channels-section {
    padding-bottom: min(clamp(168px, 8.75vw, 336px), 14svh);
  }

  .contact-field input {
    padding-inline: clamp(20px, 1.0417vw, 40px);
  }

  .contact-field textarea {
    padding: clamp(18px, 0.9375vw, 36px) clamp(20px, 1.0417vw, 40px);
  }

  .contact-submit {
    padding-inline: clamp(24px, 1.25vw, 48px);
  }

  .footer {
    font-size: clamp(11px, 0.5729vw, 22px);
  }
}

@media (max-width: 720px) {
  :root {
    --header-height: 56px;
    --footer-height: 86px;
  }

  html:not(.js) {
    --header-height: 73px;
  }

  .topbar {
    width: 100%;
    height: var(--header-height);
    margin: 0;
    padding-inline: var(--gutter);
    border-top: 1px solid var(--ink);
    border-bottom: 0;
  }

  .menu-toggle {
    position: relative;
    z-index: 32;
    display: grid;
    width: 56px;
    height: 56px;
    margin-left: auto;
    place-items: center;
    background: transparent;
    cursor: pointer;
  }

  .menu-toggle span {
    display: block;
    font-family: var(--condensed);
    font-size: 34px;
    font-weight: 300;
    line-height: 1;
    transition:
      color 180ms ease,
      transform 220ms ease;
  }

  #primary-nav {
    position: fixed;
    z-index: 30;
    inset: 0;
    display: flex;
    visibility: hidden;
    flex-direction: column;
    align-items: flex-start;
    justify-content: safe center;
    gap: 24px;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 84px 9.6vw 56px;
    background: var(--base-grey-900);
    opacity: 0;
    pointer-events: none;
    transition:
      opacity 180ms ease,
      visibility 0s linear 180ms;
  }

  #primary-nav::before {
    margin-bottom: 10px;
    color: var(--base-white);
    content: "DONGMIN";
    font-family: var(--condensed);
    font-size: clamp(52px, 16vw, 68px);
    font-stretch: condensed;
    font-weight: 700;
    letter-spacing: -0.065em;
    line-height: 0.9;
  }

  #primary-nav a,
  #primary-nav a:first-child,
  #primary-nav a:last-child {
    justify-self: auto;
    padding: 0;
    color: var(--base-white);
    font-size: 24px;
    font-weight: 500;
    letter-spacing: 0.08em;
  }

  .menu-open {
    overflow: hidden;
  }

  .menu-open #primary-nav {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transition:
      opacity 180ms ease,
      visibility 0s;
  }

  .menu-open .menu-toggle span {
    transform: rotate(45deg);
    color: var(--base-white);
  }

  .menu-open .menu-toggle:focus-visible {
    outline-color: var(--base-white);
  }

  html:not(.js) .topbar {
    height: var(--header-height);
    padding-block: 14px;
  }

  html:not(.js) .menu-toggle {
    display: none;
  }

  html:not(.js) #primary-nav {
    position: static;
    visibility: visible;
    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
    gap: 16px 24px;
    padding: 0;
    background: transparent;
    opacity: 1;
    pointer-events: auto;
  }

  html:not(.js) #primary-nav::before {
    display: none;
  }

  html:not(.js) #primary-nav a,
  html:not(.js) #primary-nav a:first-child,
  html:not(.js) #primary-nav a:last-child {
    color: var(--ink);
    font-size: 12px;
  }

  .bio-hero {
    min-height: 0;
    row-gap: clamp(24px, 7vw, 32px);
    padding: 32px 0 72px;
  }

  .bio-hero > .section-aside {
    min-height: 0;
    margin-bottom: 0;
  }

  .bio-index {
    align-self: flex-end;
  }

  .bio-index-year {
    font-size: 11px;
  }

  .bio-index .bio-index-company {
    margin-top: 0;
    font-size: 14px;
  }

  .bio-index-role {
    font-size: 14px;
  }

  .bio-career-panel {
    gap: 14px;
    margin-top: 7px;
    padding-top: 12px;
  }

  .bio-career-toggle {
    width: 16px;
  }

  .bio-career-toggle::before {
    font-size: 16px;
  }

  .bio-career-columns {
    gap: 16px;
  }

  .bio-career-section h3 {
    margin-bottom: 8px;
    font-size: 10px;
  }

  .bio-career-list,
  .bio-career-result-grid {
    gap: 8px;
  }

  .bio-career-list > li,
  .bio-career-result-grid > li {
    padding-left: 8px;
  }

  .bio-career-list strong,
  .bio-career-result-grid strong {
    font-size: 12px;
  }

  .bio-career-list span,
  .bio-career-result-grid span {
    font-size: 11px;
  }

  .bio-career-meta {
    font-size: 11px;
  }

  .works-section,
  .channels-section {
    padding: 40px 0 88px;
  }

  .channels-section {
    min-height: 0;
  }

  .section-aside {
    margin-bottom: 40px;
  }

  .section-name {
    font-size: 32px;
    line-height: 1;
  }

  .section-count {
    margin-top: 9px;
    font-size: 10px;
  }

  .project-grid {
    width: 100%;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
    gap: 36px 16px;
    justify-content: stretch;
  }

  .project-media {
    aspect-ratio: 2 / 1;
  }

  .project-caption {
    grid-template-columns: 24px minmax(0, 1fr) var(--project-arrow-size);
    gap: 8px;
    padding-top: 9px;
  }

  .project-number {
    padding-top: 2px;
    font-size: 10px;
  }

  .project-caption h3 {
    font-size: 16px;
  }

  .project-kind {
    margin-top: 7px;
    font-size: 11px;
  }

  .poster-kicker,
  .poster-title {
    left: 14px;
  }

  .poster-kicker {
    top: 13px;
    font-size: 10px;
  }

  .poster-title {
    bottom: 12px;
    font-size: 20px;
  }

  .contact-field input {
    padding-inline: 16px;
  }

  .contact-field textarea {
    padding: 16px;
  }

  .contact-submit {
    padding-inline: 16px;
  }

  .contact-sent-title {
    font-size: clamp(52px, 18vw, 88px);
  }

  .contact-sent-copy {
    margin-top: 36px;
    font-size: 15px;
  }

  .footer {
    font-size: 10px;
  }

  .not-found-page {
    padding-block: 48px;
  }
}

@media (max-width: 390px) {
  #primary-nav {
    gap: 20px;
  }
}

@media (max-height: 700px) and (max-width: 720px) {
  #primary-nav {
    gap: 14px;
    padding-block: 72px 32px;
  }
}

@media (forced-colors: active) {
  .hero-wordmark,
  .hero-statement {
    color: CanvasText;
    mix-blend-mode: normal;
  }

  .project-card .poster-title {
    background: none !important;
    background-clip: border-box !important;
    color: CanvasText !important;
    -webkit-text-fill-color: CanvasText !important;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .bio-career-details::details-content {
    transition-duration: 0.01ms !important;
  }
}

@media (min-width: 1100px) {
  .project-grid.channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Career timeline retains the WORKS artwork and slice treatment. */
@media (max-width: 720px) {
  .bio-career-header {
    grid-template-columns: 76px minmax(0, 1fr);
    column-gap: 14px;
    padding: 8px 0;
  }
  .bio-index {
    --timeline-inset: 20px;
  }
}
@media (forced-colors: active) {
  .bio-index .bio-index-company {
    background: none;
    color: CanvasText;
    -webkit-text-fill-color: CanvasText;
  }
}

@media (min-width: 1100px) {
  .bio-hero {
    height: calc(100svh - var(--header-height));
    min-height: 0;
  }
  .bio-index {
    width: min(100%, calc(var(--side-rail-width) * 0.84));
    min-height: 0;
    max-height: 100%;
    overflow-y: auto;
    overscroll-behavior-y: contain;
    scrollbar-width: none;
    padding-right: 8px;
    --career-row-height: clamp(60px, 7.5svh, 84px);
    --timeline-inset: 22px;
  }
  .bio-index-item {
    padding-bottom: clamp(6px, 1svh, 12px);
  }
  .bio-career-header {
    grid-template-columns: clamp(52px, 6.5svh, 72px) minmax(0, 1fr);
    min-height: var(--career-row-height);
    column-gap: clamp(12px, 1.4vw, 22px);
    row-gap: 2px;
    padding: 4px 0;
  }
  .career-media {
    align-self: center;
    height: clamp(52px, 6.5svh, 72px);
    min-height: 0;
  }
  .career-logo {
    max-height: 48px;
  }
  .bio-index-item::before {
    top: calc(var(--career-row-height) / 2 - 4px);
  }
  .bio-index-item:not(:last-child)::after {
    top: calc(var(--career-row-height) / 2 + 10px);
    bottom: calc(10px - var(--career-row-height) / 2);
  }
}

/* Channel marks reverse on hover without changing their size. */
.channel-github .channel-logo,
.channel-inflearn .channel-logo {
  transition: filter 220ms ease;
}
.channel-github:is(:hover, :focus-visible) .channel-logo,
.channel-inflearn:is(:hover, :focus-visible) .channel-logo {
  filter: brightness(0) invert(1);
}
.channel-youtube .channel-logo path {
  transition: fill 220ms ease;
}
.channel-youtube:is(:hover, :focus-visible) .channel-logo path:first-child {
  fill: #fff;
}
.channel-youtube:is(:hover, :focus-visible) .channel-logo path:last-child {
  fill: #ff0033;
}