@font-face {
  font-family: "Pretendard";
  src:
    local("Pretendard Regular"),
    local("Pretendard"),
    url("./assets/fonts/Pretendard-Regular.otf") format("opentype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Pretendard";
  src:
    local("Pretendard Medium"),
    local("Pretendard"),
    url("./assets/fonts/Pretendard-Medium.otf") format("opentype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Pretendard";
  src:
    local("Pretendard SemiBold"),
    local("Pretendard"),
    url("./assets/fonts/Pretendard-SemiBold.otf") format("opentype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #f6f6f1;
  --ink: #0b0b0a;
  --muted: #66645e;
  --line: #cdcdc4;
  --accent: #e11d1a;
  --soft: #ebeae2;
  --font-main: Helvetica, "Helvetica Neue", Arial, sans-serif;
  --font-sub: "Pretendard", "Apple SD Gothic Neo", sans-serif;
  --page-x: clamp(18px, 3.4vw, 54px);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  color: var(--ink);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-main);
  letter-spacing: 0;
}

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

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  text-align: left;
}

a {
  text-decoration: none;
}

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

.skip-link {
  position: fixed;
  left: var(--page-x);
  top: 14px;
  z-index: 30;
  transform: translateY(-150%);
  background: var(--ink);
  color: var(--bg);
  padding: 10px 14px;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 88px;
  padding: 0 var(--page-x);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  font-family: var(--font-main);
  font-size: clamp(18px, 1.6vw, 25px);
  line-height: 1;
}

.nav-tabs {
  display: flex;
  gap: clamp(20px, 2vw, 34px);
}

.site-header a {
  position: relative;
}

.site-header a::after,
.text-tab::after,
.filter-tab::after {
  position: absolute;
  right: 0;
  bottom: -4px;
  left: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
  content: "";
}

.site-header a:hover::after,
.site-header a.is-active::after,
.text-tab:hover::after,
.text-tab.is-active::after,
.filter-tab:hover::after,
.filter-tab.is-active::after {
  transform: scaleX(1);
}

.top-stage {
  position: relative;
  overflow: hidden;
  min-height: clamp(280px, 35vw, 540px);
  padding: clamp(72px, 8vw, 128px) var(--page-x) 0;
  border-bottom: 1px solid var(--line);
}

.top-stage::before {
  position: absolute;
  inset: 88px var(--page-x) 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--line) 42%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--line) 42%, transparent) 1px, transparent 1px);
  background-size: 8.333% 100%, 100% 33.333%;
  opacity: 0.52;
  content: "";
}

.top-stage::after {
  position: absolute;
  right: var(--page-x);
  bottom: clamp(22px, 3vw, 42px);
  z-index: 0;
  color: var(--accent);
  font-size: clamp(13px, 1.25vw, 18px);
  line-height: 1.2;
  white-space: pre;
  content: "BRAND ACTION\A PARTNER";
}

.brand-row {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 18px;
}

h1 {
  margin: 0;
  font-family: var(--font-main);
  font-size: clamp(42px, 10.6vw, 150px);
  font-weight: 400;
  line-height: 0.84;
}

.brand-row p,
.brand-subtitle,
.eyebrow,
.site-footer {
  color: var(--muted);
  font-size: clamp(13px, 1.12vw, 18px);
  line-height: 1.2;
}

.brand-row p {
  justify-self: end;
  margin: 0;
  white-space: nowrap;
}

.brand-subtitle {
  position: relative;
  z-index: 1;
  margin: 18px 0 0;
}

.info-section {
  display: grid;
  grid-template-columns: minmax(0, 1.85fr) minmax(320px, 0.95fr);
  gap: clamp(48px, 7vw, 120px);
  padding: clamp(68px, 8vw, 110px) var(--page-x) clamp(70px, 8vw, 120px);
  border-bottom: 1px solid var(--line);
}

.hero-copy h2,
.contact-section h2,
.landing-title {
  margin: 0;
  font-family: var(--font-main);
  font-size: clamp(42px, 5vw, 74px);
  font-weight: 400;
  line-height: 1.08;
}

.hero-copy p,
.contact-section p,
.landing-description {
  max-width: 760px;
  margin: clamp(44px, 5vw, 70px) 0 0;
  font-family: var(--font-sub);
  font-size: clamp(20px, 1.95vw, 30px);
  font-weight: 500;
  line-height: 1.42;
}

.studio-info {
  display: grid;
  align-content: start;
  gap: 56px;
}

.copy-button {
  margin-top: 18px;
  font-size: clamp(21px, 2vw, 29px);
  line-height: 1.12;
}

.small-copy {
  margin: 30px 0 0;
  font-family: var(--font-sub);
  font-size: clamp(18px, 1.7vw, 24px);
  font-weight: 500;
  line-height: 1.25;
}

.service-stack {
  display: grid;
  gap: 14px;
}

.text-tab,
.filter-tab {
  position: relative;
  width: max-content;
  font-family: var(--font-main);
  font-size: clamp(20px, 2vw, 30px);
  line-height: 1.1;
}

.feature-panel {
  margin: 0;
}

.feature-panel img {
  width: 100%;
  aspect-ratio: 2.15 / 1;
  object-fit: cover;
  border: 1px solid var(--ink);
}

.feature-panel figcaption {
  margin-top: 14px;
  color: var(--muted);
  font-family: var(--font-sub);
  font-size: 16px;
}

.selected-section {
  padding: clamp(58px, 6vw, 90px) var(--page-x);
  border-bottom: 1px solid var(--line);
}

.selected-list {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 34px;
  margin-top: 28px;
}

.selected-list button {
  font-size: clamp(23px, 2.3vw, 34px);
  line-height: 1.12;
}

.process-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(34px, 5vw, 76px);
  padding: clamp(54px, 5.5vw, 86px) var(--page-x);
  border-bottom: 1px solid var(--line);
}

.process-title h2 {
  max-width: 640px;
  margin: 24px 0 0;
  font-family: var(--font-main);
  font-size: clamp(38px, 4.2vw, 66px);
  font-weight: 400;
  line-height: 0.98;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  min-height: 270px;
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--ink);
}

.process-grid span {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 270px;
  padding: 18px;
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  font-family: var(--font-main);
  font-size: clamp(18px, 1.7vw, 26px);
  line-height: 1.05;
}

.process-grid span::before {
  position: absolute;
  top: 18px;
  left: 18px;
  width: 34px;
  height: 34px;
  border: 1px solid var(--accent);
  content: "";
}

.process-grid span:nth-child(even) {
  background: var(--soft);
}

.capability-section {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  padding: clamp(54px, 5.5vw, 82px) var(--page-x);
  border-bottom: 1px solid var(--line);
}

.capability-section article {
  min-height: 184px;
  padding: 20px;
  border: 1px solid var(--line);
}

.capability-section span {
  color: var(--accent);
  font-size: 18px;
}

.capability-section h3 {
  margin: 24px 0 18px;
  font-family: var(--font-main);
  font-size: clamp(23px, 2.2vw, 31px);
  font-weight: 400;
  line-height: 1.05;
}

.capability-section p,
.project-meta,
.project-scope,
.landing-meta,
.landing-details,
.landing-credit {
  font-family: var(--font-sub);
}

.capability-section p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.35;
}

.works-section {
  padding: clamp(58px, 6vw, 90px) var(--page-x) 0;
}

.works-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 28px;
  margin-bottom: 40px;
}

.filter-tab {
  font-size: clamp(22px, 2vw, 28px);
}

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

.project-row {
  display: grid;
  grid-template-columns: 64px minmax(260px, 1fr) minmax(220px, 0.55fr) 226px;
  gap: 30px;
  align-items: center;
  min-height: 118px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  transition: opacity 160ms ease, background 160ms ease;
}

.project-row:hover,
.project-row:focus-visible {
  background: var(--soft);
  outline: 0;
}

.project-number {
  color: var(--muted);
  font-size: 18px;
}

.project-name {
  display: block;
  font-family: var(--font-main);
  font-size: clamp(26px, 3vw, 46px);
  line-height: 0.98;
}

.project-meta {
  display: block;
  margin-top: 16px;
  color: var(--muted);
  font-size: 18px;
  font-weight: 500;
}

.project-scope {
  font-size: clamp(18px, 1.6vw, 23px);
  font-weight: 600;
  line-height: 1.24;
}

.project-row img {
  width: 226px;
  height: 86px;
  object-fit: cover;
  border: 1px solid var(--ink);
}

.project-row.is-hidden {
  display: none;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(260px, 430px) minmax(0, 1fr);
  gap: clamp(44px, 6vw, 90px);
  align-items: center;
  padding: clamp(72px, 8vw, 110px) var(--page-x) 54px;
}

.contact-section figure {
  margin: 0;
}

.contact-section img {
  width: 100%;
  aspect-ratio: 1.65 / 1;
  object-fit: cover;
  border: 1px solid var(--ink);
}

.contact-section p {
  margin-top: 44px;
}

.contact-section a {
  display: inline-block;
  margin-top: 28px;
  color: var(--accent);
  font-size: clamp(18px, 1.4vw, 22px);
}

.project-landing {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  overflow: auto;
  background: var(--bg);
}

.project-landing.is-open {
  display: block;
}

.landing-inner {
  min-height: 100%;
  padding: 28px var(--page-x) 54px;
}

.back-button {
  position: sticky;
  top: 22px;
  z-index: 2;
  padding: 10px 0;
  color: var(--muted);
  font-size: 20px;
}

.landing-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: clamp(42px, 6vw, 100px);
  margin-top: 66px;
}

.landing-kicker {
  color: var(--muted);
  font-size: 18px;
}

.landing-title {
  margin-top: 26px;
  font-size: clamp(52px, 7.2vw, 112px);
  line-height: 0.94;
}

.landing-description {
  margin-top: 52px;
}

.landing-meta {
  display: grid;
  gap: 12px;
  margin-top: 54px;
  color: var(--muted);
  font-size: 18px;
  font-weight: 500;
}

.landing-details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 38px;
}

.landing-details p {
  margin: 0;
  padding: 18px;
  border: 1px solid var(--line);
  font-size: 17px;
  line-height: 1.35;
}

.landing-media {
  display: grid;
  gap: 18px;
}

.landing-media img {
  width: 100%;
  max-height: 74vh;
  object-fit: cover;
  border: 1px solid var(--ink);
}

.landing-credit {
  color: var(--muted);
  font-size: 16px;
}

.toast {
  position: fixed;
  right: var(--page-x);
  bottom: 24px;
  z-index: 80;
  transform: translateY(22px);
  opacity: 0;
  pointer-events: none;
  background: var(--ink);
  color: var(--bg);
  padding: 12px 15px;
  font-family: var(--font-sub);
  transition: opacity 160ms ease, transform 160ms ease;
}

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

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 0 var(--page-x) 38px;
}

.site-footer p {
  margin: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

@media (max-width: 1100px) {
  .info-section,
  .landing-grid {
    grid-template-columns: 1fr;
  }

  .studio-info {
    grid-template-columns: minmax(240px, 1fr) minmax(280px, 1fr);
    align-items: start;
  }

  .feature-panel {
    grid-column: 1 / -1;
  }

  .capability-section {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-section {
    grid-template-columns: 1fr;
  }

  .project-row {
    grid-template-columns: 44px minmax(0, 1fr) minmax(170px, 0.5fr);
  }

  .project-row img {
    display: none;
  }
}

@media (max-width: 720px) {
  .site-header {
    min-height: 68px;
  }

  .brand-row {
    grid-template-columns: 1fr;
  }

  .brand-row p {
    white-space: normal;
  }

  .studio-info,
  .capability-section,
  .contact-section,
  .landing-details,
  .process-grid {
    grid-template-columns: 1fr;
  }

  .process-grid,
  .process-grid span {
    min-height: 96px;
  }

  .process-grid span {
    align-items: center;
    padding-left: 68px;
  }

  .project-row {
    grid-template-columns: 34px 1fr;
    gap: 16px;
    align-items: start;
    padding: 22px 0;
  }

  .project-scope {
    grid-column: 2;
  }

  .selected-list {
    gap: 14px 24px;
  }

  .site-footer {
    display: grid;
  }
}