:root {
  --color-bg: #f5f3ee;
  --color-paper: #ffffff;
  --color-ink: #221f19;
  --color-accent: #5b6b4e;
  --color-brass: #9c7a4e;
  --color-line: #ddd7c9;

  --font-display: "Gowun Batang", serif;
  --font-body: "PretendardVariable", "Pretendard", -apple-system, BlinkMacSystemFont, sans-serif;

  --wrap: 1180px;
  --space-section: clamp(4.5rem, 8vw, 8rem);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 400;
  margin: 0;
  color: var(--color-ink);
}

p {
  margin: 0 0 1.1em;
}

a {
  color: inherit;
}

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

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 2rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-ink);
  color: var(--color-bg);
  padding: 0.75rem 1.25rem;
  z-index: 200;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.primary-nav {
  display: flex;
  gap: 2rem;
}

.primary-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--color-ink);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle-bar {
  display: block;
  height: 1.5px;
  background: var(--color-ink);
  width: 100%;
}

/* ---------- buttons ---------- */

.button {
  display: inline-block;
  text-decoration: none;
  padding: 0.85rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 2px;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.button-primary {
  background: var(--color-accent);
  color: var(--color-paper);
  border: 1px solid var(--color-accent);
}

.button-primary:hover {
  background: transparent;
  color: var(--color-accent);
}

/* ---------- hero ---------- */

.hero {
  height: 92vh;
  min-height: 560px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: flex-end;
  position: relative;
}

.hero-overlay {
  width: 100%;
  padding-top: 8rem;
  padding-bottom: 3.5rem;
  background: linear-gradient(to top, rgba(245, 243, 238, 0.97) 0%, rgba(245, 243, 238, 0.75) 45%, rgba(245, 243, 238, 0) 100%);
}

.hero-kicker {
  font-size: 0.95rem;
  color: var(--color-brass);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: clamp(2.2rem, 4.4vw, 3.6rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}

.hero-body {
  max-width: 34em;
  font-size: 1.05rem;
}

/* ---------- sections ---------- */

.section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--color-line);
  scroll-margin-top: 4.5rem;
}

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

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.3;
  margin-bottom: 2.5rem;
}

.section-lead {
  max-width: 40em;
  font-size: 1.05rem;
  color: var(--color-ink);
}

/* ---------- philosophy ---------- */

.philosophy-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: start;
}

.philosophy-text {
  max-width: 42em;
}

.philosophy-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 2 / 3;
}

.pull-quote {
  margin: 2rem 0 0;
  padding-left: 1.5rem;
  border-left: 2px solid var(--color-brass);
  font-family: var(--font-display);
  font-size: 1.2rem;
  line-height: 1.6;
}

.pull-quote cite {
  display: block;
  margin-top: 0.75rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-style: normal;
  color: var(--color-brass);
}

/* ---------- services ---------- */

.service-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

.service-item {
  border-top: 1px solid var(--color-line);
  padding-top: 1.5rem;
}

.service-item h3 {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

.service-item p {
  font-size: 0.98rem;
  margin-bottom: 0;
}

/* ---------- work carousel ---------- */

.work-carousel {
  margin-top: 2rem;
}

.work-viewport {
  position: relative;
  overflow: hidden;
}

.work-track {
  display: flex;
  transition: transform 0.45s cubic-bezier(0.65, 0, 0.35, 1);
}

.work-track.is-dragging {
  transition: none;
}

.work-slide {
  flex: 0 0 100%;
  min-width: 0;
  user-select: none;
}

.work-slide img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
  -webkit-user-drag: none;
}

.work-caption {
  padding-top: 1.25rem;
}

.work-caption h3 {
  font-size: 1.15rem;
  margin-bottom: 0.3rem;
}

.work-meta {
  font-size: 0.88rem;
  color: var(--color-brass);
  margin-bottom: 0;
}

.work-nav {
  position: absolute;
  top: calc(50% - 1.4rem);
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  border: none;
  background: rgba(245, 243, 238, 0.85);
  color: var(--color-ink);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s ease;
}

.work-nav:hover {
  background: var(--color-paper);
}

.work-nav-prev {
  left: 1rem;
}

.work-nav-next {
  right: 1rem;
}

.work-dots {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 1.75rem;
}

.work-dots button {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  border: none;
  padding: 0;
  background: var(--color-line);
  cursor: pointer;
}

.work-dots button.is-active {
  background: var(--color-accent);
}

@media (max-width: 640px) {
  .work-slide img {
    aspect-ratio: 4 / 3;
  }

  .work-nav {
    width: 2.3rem;
    height: 2.3rem;
  }
}

.work-note {
  margin-top: 2.5rem;
  font-size: 0.85rem;
  color: var(--color-brass);
}

/* ---------- process ---------- */

.process-list li {
  display: grid;
  grid-template-columns: 5rem 1fr;
  gap: 1.5rem;
  padding: 2rem 0;
  border-top: 1px solid var(--color-line);
}

.process-list li:last-child {
  border-bottom: 1px solid var(--color-line);
}

.process-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-brass);
}

.process-list h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.process-list p {
  margin-bottom: 0;
  max-width: 38em;
}

/* ---------- contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-info dl {
  margin: 0 0 2rem;
}

.contact-info dl > div {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-top: 1px solid var(--color-line);
}

.contact-info dl > div:last-child {
  border-bottom: 1px solid var(--color-line);
}

.contact-info dt {
  width: 6rem;
  flex-shrink: 0;
  color: var(--color-brass);
  font-size: 0.9rem;
}

.contact-info dd {
  margin: 0;
}

.contact-info a {
  text-decoration: none;
  border-bottom: 1px solid var(--color-line);
}

.contact-info a:hover {
  border-color: var(--color-ink);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--color-line);
  padding: 2.5rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--color-brass);
  margin: 0;
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .hero {
    height: auto;
    min-height: 0;
    aspect-ratio: 3 / 4;
  }

  .hero-overlay {
    padding-top: 4rem;
  }

  .philosophy-grid {
    grid-template-columns: 1fr;
  }

  .philosophy-image {
    order: -1;
    max-width: 22rem;
  }

  .philosophy-image img {
    aspect-ratio: 4 / 3;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .service-list {
    grid-template-columns: 1fr;
  }

  .work-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .wrap {
    padding: 0 1.25rem;
  }

  .primary-nav {
    position: fixed;
    inset: 4.5rem 0 0 0;
    background: var(--color-bg);
    flex-direction: column;
    gap: 0;
    padding: 1rem 1.25rem;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

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

  .primary-nav a {
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--color-line);
  }

  .nav-toggle {
    display: flex;
  }

  .work-grid {
    grid-template-columns: 1fr;
  }

  .work-card-wide {
    grid-column: span 1;
  }

  .process-list li {
    grid-template-columns: 3rem 1fr;
  }
}