@import url("https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600&family=Noto+Sans+KR:wght@400;500;600;700&display=swap");

:root {
  --paper: #f5f4f1;
  --white: #ffffff;
  --ink: #111111;
  --muted: #686868;
  --line: #d7d5d0;
  --red: #e32619;
  --red-dark: #ba1b12;
  --content: 1440px;
  --gutter: clamp(1.25rem, 4vw, 4.5rem);
  --section-space: clamp(4.5rem, 8vw, 8.25rem);
  --header-height: 68px;
  --anchor-gap: 12px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + var(--anchor-gap));
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "DM Sans", "Noto Sans KR", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

::selection {
  background: var(--red);
  color: var(--white);
}

.skip-link {
  position: fixed;
  z-index: 200;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--red);
  color: var(--white);
  transform: translateY(-200%);
}

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

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  display: flex;
  width: 100%;
  height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  border-bottom: 1px solid transparent;
  background: rgba(245, 244, 241, 0.92);
  backdrop-filter: blur(14px);
  transition: border-color 180ms ease, background 180ms ease;
}

.site-header.is-scrolled {
  border-color: var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.brand-mark {
  width: 9px;
  height: 9px;
  background: var(--red);
  border-radius: 50%;
}

.primary-navigation {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.4vw, 2.25rem);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.primary-navigation a {
  position: relative;
  padding: 0.4rem 0;
}

.primary-navigation a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--red);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms var(--ease);
}

.primary-navigation a:hover::after,
.primary-navigation a:focus-visible::after,
.primary-navigation a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-contact {
  padding: 0.55rem 0.85rem !important;
  border: 1px solid var(--ink);
}

.nav-contact::after {
  display: none;
}

.nav-contact:hover,
.nav-contact:focus-visible {
  background: var(--ink);
  color: var(--white);
}

.menu-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0.75rem;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 1px;
  margin: 0.32rem 0;
  background: var(--ink);
  transition: transform 180ms ease;
}

.section,
.hero {
  position: relative;
  max-width: var(--content);
  margin: 0 auto;
  padding-right: var(--gutter);
  padding-left: var(--gutter);
  scroll-margin-top: calc(var(--header-height) + var(--anchor-gap));
}

.section-heading > *,
.project-heading > *,
.about-layout > *,
.experience-grid > *,
.project-overview > *,
.project-brief > *,
.case-flow > *,
.project-two-layout > *,
.result-band > *,
.ai-layout > * {
  min-width: 0;
}

.section {
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
}

.section-light {
  background: var(--paper);
}

.hero {
  display: grid;
  min-height: 84svh;
  padding-top: 7rem;
  padding-bottom: 2.5rem;
  align-content: space-between;
}

.hero-kicker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--ink);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero-copy {
  padding: clamp(2.5rem, 5vh, 4.5rem) 0;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin: 0 0 1.4rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow span {
  color: var(--red);
}

.hero h1 {
  max-width: 860px;
  margin: 0;
  font-size: clamp(2.7rem, 6vw, 5.75rem);
  font-weight: 500;
  letter-spacing: -0.065em;
  line-height: 1.03;
}

.hero h1 em,
.contact-main h2 em {
  color: var(--red);
  font-style: normal;
}

.hero-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.hero-footer p {
  margin: 0;
  color: #464646;
  font-size: clamp(0.9rem, 1.2vw, 1.05rem);
}

.text-link {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--ink);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(180px, 0.55fr) 1.45fr;
  gap: 3rem;
  margin-bottom: clamp(3rem, 6vw, 5.5rem);
}

.section-heading h2,
.project-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 3.7vw, 3.8rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 1.12;
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(240px, 0.9fr) 1.1fr;
  gap: clamp(2.5rem, 6vw, 6.5rem);
  margin-left: calc((100% - var(--gutter)) * 0.19);
}

.about-intro .lead {
  margin: 0 0 2rem;
  color: var(--ink);
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  font-weight: 500;
  line-height: 1.55;
}

.about-intro > p:last-child {
  margin: 0;
  color: var(--muted);
}

.principle {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 1rem;
  padding: 1.6rem 0;
  border-top: 1px solid var(--line);
}

.principle:last-child {
  border-bottom: 1px solid var(--line);
}

.principle > span,
.case-label,
.project-brief span,
.statement-label {
  color: var(--red);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.principle h3 {
  margin: -0.35rem 0 0.3rem;
  font-size: 1.4rem;
  font-weight: 600;
}

.principle p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.section-dark {
  max-width: none;
  background: var(--ink);
  color: var(--white);
}

.section-dark > * {
  width: 100%;
  max-width: calc(var(--content) - var(--gutter) * 2);
  margin-right: auto;
  margin-left: auto;
}

.section-dark .eyebrow {
  color: #b7b7b7;
}

.experience-section {
  border-top: 1px solid var(--line);
}

.experience-grid {
  display: grid;
  grid-template-columns: 0.65fr 1.35fr;
  gap: clamp(3rem, 9vw, 10rem);
}

.experience-summary > p {
  margin-top: 0;
  color: var(--muted);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 2.5rem;
}

.skill-tags span {
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 99px;
  color: #555;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.timeline-item {
  display: grid;
  grid-template-columns: minmax(110px, 0.38fr) 1fr;
  gap: 2rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}

.timeline-date {
  margin: 0;
  color: var(--red);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.timeline-item h3 {
  margin: -0.35rem 0 0.2rem;
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  font-weight: 500;
}

.timeline-item p:not(.timeline-date) {
  margin: 0.65rem 0 0;
  color: #949494;
  font-size: 0.9rem;
}

.timeline-item .timeline-company {
  margin-top: 0 !important;
  color: #555 !important;
}

.placeholder-note {
  margin: 1.2rem 0 0;
  color: #737373;
  font-size: 0.72rem;
}

.project-heading {
  display: grid;
  grid-template-columns: minmax(180px, 0.55fr) 1.45fr;
  gap: 3rem;
  padding-bottom: 2.25rem;
  border-bottom: 1px solid var(--ink);
}

.project-type {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.project-overview {
  display: grid;
  grid-template-columns: 0.55fr 1.45fr;
  gap: 3rem;
  padding: clamp(2rem, 4vw, 3.75rem) 0;
}

.project-number {
  color: var(--red);
  font-size: clamp(4rem, 8vw, 8rem);
  font-weight: 500;
  letter-spacing: -0.09em;
  line-height: 0.8;
}

.project-brief {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  align-content: start;
}

.project-brief > div {
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
}

.project-brief p {
  margin: 0.55rem 0 0;
  font-size: 0.9rem;
}

.case-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
}

.case-card {
  min-height: 320px;
  padding: clamp(1.5rem, 2.5vw, 2.25rem);
  border-right: 1px solid var(--line);
}

.case-card:last-child {
  border-right: 0;
}

.case-card h3 {
  margin: clamp(3rem, 5vw, 5rem) 0 1rem;
  font-size: clamp(1.4rem, 2vw, 1.9rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.25;
}

.case-card > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.case-card-accent {
  background: var(--red);
  color: var(--white);
}

.case-card-accent .case-label,
.case-card-accent > p:last-child {
  color: var(--white);
}

.project-actions {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-top: 2rem;
}

.project-summary {
  max-width: 610px;
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.6rem;
}

.project-detail-button {
  display: inline-flex;
  min-width: 112px;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1rem;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease;
}

.project-detail-primary {
  background: var(--ink);
  color: var(--white);
}

.project-detail-button:hover,
.project-detail-button:focus-visible {
  border-color: var(--red);
  background: var(--red);
  color: var(--white);
}

.project-contrast {
  max-width: none;
  background: var(--white);
}

.project-contrast > * {
  width: 100%;
  max-width: calc(var(--content) - var(--gutter) * 2);
  margin-right: auto;
  margin-left: auto;
}

.project-two-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 470px;
}

.project-statement {
  padding: clamp(2rem, 5vw, 5rem);
  background: var(--ink);
  color: var(--white);
}

.statement-copy {
  margin: clamp(5rem, 9vw, 9rem) 0 0;
  font-size: clamp(1.55rem, 2.7vw, 2.7rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1.25;
}

.statement-copy em {
  color: var(--red);
  font-style: normal;
}

.project-steps {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 5vw, 5rem);
  border: 1px solid var(--line);
  border-left: 0;
}

.project-steps article {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 1rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
}

.project-steps article:last-child {
  border-bottom: 1px solid var(--line);
}

.project-steps article > span {
  color: var(--red);
  font-size: 0.7rem;
}

.project-steps h3 {
  margin: -0.4rem 0 0.35rem;
  font-size: 1.3rem;
}

.project-steps p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.result-band {
  display: grid;
  grid-template-columns: 0.35fr 1.2fr 0.45fr;
  gap: 2rem;
  align-items: end;
  padding: 2.25rem 0 0;
}

.result-band-compact {
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  padding-top: 1.5rem;
}

.result-band > p {
  margin: 0;
  color: var(--red);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.result-band h3 {
  margin: 0;
  font-size: clamp(1.35rem, 2.3vw, 2.15rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.3;
}

.result-band > span {
  color: var(--muted);
  font-size: 0.72rem;
  text-align: right;
}

.ai-layout {
  display: grid;
  grid-template-columns: 0.65fr 1.35fr;
  gap: clamp(3rem, 9vw, 10rem);
}

.ai-intro {
  margin: 0;
  color: #aaa;
  font-size: clamp(1rem, 1.5vw, 1.25rem);
}

.ai-process {
  margin: 0;
  padding: 0;
  list-style: none;
}

.ai-process li {
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  gap: 1rem;
  padding: 1.6rem 0;
  border-top: 1px solid #3a3a3a;
}

.ai-process li:last-child {
  border-bottom: 1px solid #3a3a3a;
}

.ai-process li > span {
  color: var(--red);
  font-size: 0.7rem;
}

.ai-process h3 {
  margin: -0.45rem 0 0.3rem;
  font-size: 1.4rem;
  font-weight: 500;
}

.ai-process p {
  margin: 0;
  color: #898989;
  font-size: 0.88rem;
}

.contact-section {
  max-width: none;
  padding-top: clamp(3.4rem, 6vw, 6.2rem);
  padding-bottom: 1.5rem;
  background: var(--paper);
}

.contact-section > * {
  width: 100%;
  max-width: calc(var(--content) - var(--gutter) * 2);
  margin-right: auto;
  margin-left: auto;
}

.contact-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--ink);
}

.contact-top > p:last-child {
  max-width: 350px;
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  text-align: right;
}

.contact-main {
  padding: clamp(2.25rem, 5.25vw, 4.5rem) 0 clamp(3rem, 6vw, 5.625rem);
}

.contact-main h2 {
  margin: 0 0 2.25rem;
  font-size: clamp(2rem, 4.6vw, 4.6rem);
  font-weight: 500;
  letter-spacing: -0.07em;
  line-height: 1.02;
  white-space: nowrap;
}

.contact-main a {
  display: flex;
  max-width: 650px;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  border-bottom: 1px solid var(--ink);
  font-size: clamp(1rem, 2vw, 1.4rem);
  transition: color 180ms ease;
}

.contact-main a:hover,
.contact-main a:focus-visible {
  color: var(--red);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.72rem;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .menu-toggle {
    position: relative;
    z-index: 102;
    display: block;
  }

  .menu-toggle[aria-expanded="true"] span:first-child {
    transform: translateY(3px) rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-3px) rotate(-45deg);
  }

  .primary-navigation {
    position: fixed;
    z-index: 101;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 6rem var(--gutter);
    background: var(--paper);
    font-size: clamp(1.5rem, 6vw, 2.5rem);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-1rem);
    transition: opacity 220ms ease, transform 220ms var(--ease);
  }

  .primary-navigation.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-contact {
    margin-top: 1rem;
  }

  .section-heading,
  .project-heading {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .about-layout {
    grid-template-columns: 1fr;
    margin-left: 16%;
  }

  .experience-grid,
  .ai-layout {
    grid-template-columns: 1fr;
  }

  .experience-summary,
  .ai-intro {
    max-width: 590px;
  }

  .project-overview {
    grid-template-columns: 0.45fr 1.55fr;
  }

  .case-flow {
    grid-template-columns: 1fr;
  }

  .case-card {
    min-height: 330px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .case-card:last-child {
    border-bottom: 0;
  }

  .case-card h3 {
    margin-top: 4.5rem;
  }

  .project-two-layout {
    grid-template-columns: 1fr;
  }

  .project-steps {
    border-top: 0;
    border-left: 1px solid var(--line);
  }
}

@media (max-width: 680px) {
  :root {
    --gutter: 1.25rem;
    --section-space: 4.25rem;
    --header-height: 60px;
    --anchor-gap: 10px;
  }

  .site-header {
    height: var(--header-height);
  }

  .hero {
    min-height: 650px;
    padding-top: 5.5rem;
    padding-bottom: 1.75rem;
  }

  .hero-copy {
    padding: 3rem 0;
  }

  .hero h1 {
    font-size: clamp(2.55rem, 11vw, 3.6rem);
    line-height: 1.08;
  }

  .hero-footer {
    display: block;
  }

  .hero-footer p br {
    display: none;
  }

  .text-link {
    margin-top: 2rem;
  }

  .eyebrow {
    margin-bottom: 1.25rem;
  }

  .section-heading {
    margin-bottom: 3.5rem;
  }

  .section-heading h2,
  .project-heading h2 {
    font-size: clamp(1.95rem, 9vw, 2.75rem);
  }

  .about-layout {
    margin-left: 0;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.7rem;
  }

  .project-overview {
    grid-template-columns: 1fr;
  }

  .project-number {
    font-size: 4.5rem;
  }

  .project-brief {
    grid-template-columns: 1fr;
  }

  .case-card {
    min-height: 280px;
  }

  .project-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .project-detail-button {
    flex: 1 1 130px;
  }

  .project-links {
    width: 100%;
    justify-content: flex-start;
  }

  .project-two-layout {
    min-height: 0;
  }

  .project-statement {
    min-height: 380px;
  }

  .statement-copy {
    margin-top: 7rem;
  }

  .result-band {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .result-band > span {
    text-align: left;
  }

  .contact-top {
    display: block;
  }

  .contact-top > p:last-child {
    margin-top: 1.5rem;
    text-align: left;
  }

  .contact-main h2 {
    font-size: clamp(1.6rem, 8.2vw, 3rem);
  }

  .contact-main a {
    overflow-wrap: anywhere;
  }
}

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

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

  .reveal {
    opacity: 1;
    transform: none;
  }
}