:root {
  --color-background: #e7e5df;
  --color-surface: #f4f2ec;
  --color-surface-soft: #d8d6cd;
  --color-text-main: #202321;
  --color-text-sub: #60645d;
  --color-line: #b9b7ae;
  --color-primary: #384842;
  --color-accent: #8f958b;
  --font-heading: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  --font-body: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  --font-label: "Cormorant Garamond", Georgia, serif; /* 초슬림 우아 세리프 */
  --container: 1280px;
  --side-desktop: 64px;
  --side-tablet: 40px;
  --side-mobile: 22px;
  --section-desktop: 120px;
  --section-mobile: 72px;
  --hero-gap: 84px;
  --grid-gap: 32px;
  --card-padding: 32px;
  --radius-sm: 2px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-pill: 999px;
  --border-hairline: 1px solid color-mix(in srgb, var(--color-line) 80%, transparent);
  --shadow-soft: 0 24px 80px rgba(32, 35, 33, 0.11);
  --shadow-card: 0 18px 50px rgba(32, 35, 33, 0.12);
  --hero-ratio: 16 / 10;
  --card-ratio: 4 / 5;
  --texture-ratio: 1 / 1;
  --space-ratio: 3 / 2;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(90deg, rgba(56, 72, 66, 0.012) 1px, transparent 1px) 0 0 / 92px 92px,
    var(--color-background);
  color: var(--color-text-main);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.72;
  letter-spacing: 0;
  word-break: keep-all;
  overflow-wrap: break-word;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

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

.skip-link:focus {
  z-index: 20;
  width: auto;
  height: auto;
  clip: auto;
  left: 24px;
  top: 24px;
  padding: 10px 14px;
  background: var(--color-primary);
  color: var(--color-surface);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--color-background) 88%, transparent);
  border-bottom: var(--border-hairline);
  backdrop-filter: blur(18px);
}

.nav-shell {
  max-width: var(--container);
  margin: 0 auto;
  padding: 18px var(--side-desktop);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand-mark {
  display: inline-grid;
  grid-template-columns: auto auto;
  align-items: baseline;
  gap: 10px;
  font-weight: 700;
}

.brand-mark span {
  font-size: 24px;
}

.brand-mark small,
.eyebrow,
.section-kicker,
.hero-index,
.specimen-figure figcaption,
.material-list dt,
.fact-strip,
.site-footer {
  font-family: var(--font-label);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.brand-mark small {
  color: var(--color-text-sub);
  font-size: 11px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  color: var(--color-text-sub);
  font-size: 15px;
}

.nav-links a {
  border-bottom: 1px solid transparent;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--color-text-main);
  border-color: var(--color-primary);
}

.menu-button {
  display: none;
  width: 42px;
  height: 34px;
  border: var(--border-hairline);
  background: transparent;
  padding: 9px;
}

.menu-button span:not(.sr-only) {
  display: block;
  height: 1px;
  background: var(--color-text-main);
  margin: 5px 0;
}

.section-band {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--section-desktop) var(--side-desktop);
}

.hero {
  min-height: calc(100svh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(420px, 1.18fr);
  align-items: center;
  gap: var(--hero-gap);
  padding-top: 76px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 20px;
  color: var(--color-primary);
  font-size: 12px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  letter-spacing: 0;
  word-break: keep-all;
  text-wrap: balance;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(58px, 7vw, 112px);
  line-height: 1.08;
}

h2 {
  margin-bottom: 26px;
  font-size: clamp(34px, 4.2vw, 64px);
  line-height: 1.12;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.28;
}

.hero-line {
  margin-bottom: 24px;
  color: var(--color-primary);
  font-size: clamp(22px, 2vw, 31px);
  line-height: 1.32;
}

.hero-body,
.archive-text p,
.material-copy > p,
.inquiry-copy > p {
  max-width: 620px;
  color: var(--color-text-sub);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.button-primary,
.button-secondary {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid var(--color-primary);
  padding: 12px 18px;
  transition: transform 220ms ease, background 220ms ease, color 220ms ease;
}

.button-primary {
  background: var(--color-primary);
  color: var(--color-surface);
}

.button-secondary {
  color: var(--color-primary);
}

.button-primary:hover,
.button-secondary:hover {
  transform: translateY(-2px);
}

.button-primary:focus-visible,
.button-secondary:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.hero-visual {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: var(--border-hairline);
  box-shadow: var(--shadow-soft);
}

.hero-visual img {
  aspect-ratio: var(--hero-ratio);
  object-fit: cover;
}

.hero-visual figcaption {
  position: absolute;
  left: 18px;
  bottom: 16px;
  color: rgba(244, 242, 236, 0.78);
  font-family: var(--font-label);
  font-size: 11px;
}

.hero-index {
  grid-column: 1 / -1;
  display: flex;
  gap: 12px;
  border-top: var(--border-hairline);
  padding-top: 22px;
  color: var(--color-text-sub);
  font-size: 11px;
}

.hero-index span {
  flex: 1;
}

.archive-layout,
.material,
.inquiry {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(380px, 1.1fr);
  gap: var(--hero-gap);
  align-items: center;
}

.archive-text {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 48px;
}

.material-list {
  margin: 32px 0 0;
  border-top: var(--border-hairline);
}

.material-list div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 22px;
  padding: 16px 0;
  border-bottom: var(--border-hairline);
}

.material-list dt {
  color: var(--color-text-sub);
  font-size: 11px;
}

.material-list dd {
  margin: 0;
}

.specimen-card {
  min-height: 640px;
  color: var(--color-text-main);
}

.specimen-figure {
  height: 100%;
  margin: 0;
  position: relative;
  overflow: hidden;
}

.specimen-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 58%, rgba(32, 35, 33, 0.24));
  pointer-events: none;
}

.specimen-figure img {
  width: 100%;
  height: 100%;
  min-height: 640px;
  object-fit: cover;
  object-position: center center;
}

.specimen-figure figcaption {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.specimen-figure strong {
  font-family: var(--font-body);
  letter-spacing: 0;
  text-transform: none;
}

.material {
  max-width: none;
  background: var(--color-primary);
  color: var(--color-surface);
  grid-template-columns: minmax(340px, 0.86fr) minmax(0, 1fr);
  padding-left: max(var(--side-desktop), calc((100vw - var(--container)) / 2 + var(--side-desktop)));
  padding-right: max(var(--side-desktop), calc((100vw - var(--container)) / 2 + var(--side-desktop)));
}

.texture-panel {
  margin: 0;
  border: 1px solid rgba(244, 242, 236, 0.18);
  overflow: hidden;
}

.texture-panel img {
  aspect-ratio: var(--texture-ratio);
  object-fit: cover;
}

.material-copy .eyebrow,
.material-copy p {
  color: color-mix(in srgb, var(--color-surface) 78%, transparent);
}

.note-grid {
  margin-top: 54px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
}

.note-grid article {
  padding: 28px 0 0;
  border-top: 1px solid rgba(244, 242, 236, 0.24);
}

.note-grid span,
.process-list span {
  font-family: var(--font-label);
  color: var(--color-accent);
  font-size: 12px;
}

.note-grid p,
.process-list p {
  margin-bottom: 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 58px;
}

.process-image {
  margin: 0 0 44px;
  border: var(--border-hairline);
  overflow: hidden;
}

.process-image img {
  aspect-ratio: var(--space-ratio);
  object-fit: cover;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
  list-style: none;
  padding: 0;
  margin: 0;
}

.process-list li {
  min-height: 210px;
  padding: var(--card-padding);
  background: color-mix(in srgb, var(--color-surface) 74%, transparent);
  border: var(--border-hairline);
}

.inquiry {
  align-items: start;
}

.fact-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
  font-size: 11px;
}

.fact-strip span {
  border: var(--border-hairline);
  padding: 8px 10px;
}

.inquiry-form {
  padding: 34px;
  background: var(--color-surface);
  border: var(--border-hairline);
  box-shadow: var(--shadow-card);
}

.inquiry-form label {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
  color: var(--color-text-sub);
  font-size: 14px;
}

.inquiry-form input,
.inquiry-form select,
.inquiry-form textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--color-line);
  border-radius: 0;
  background: transparent;
  color: var(--color-text-main);
  padding: 10px 0;
}

.inquiry-form textarea {
  resize: vertical;
}

.form-status {
  min-height: 24px;
  margin: 14px 0 0;
  color: var(--color-primary);
}

.faq {
  grid-column: 2;
  width: 100%;
  border-top: var(--border-hairline);
}

.faq button {
  width: 100%;
  border: 0;
  border-bottom: var(--border-hairline);
  background: transparent;
  color: var(--color-text-main);
  padding: 20px 0;
  text-align: left;
  cursor: pointer;
}

.faq div {
  padding: 18px 0 24px;
  color: var(--color-text-sub);
}

.site-footer {
  max-width: var(--container);
  margin: 0 auto;
  padding: 42px var(--side-desktop) 56px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  border-top: var(--border-hairline);
  color: var(--color-text-sub);
  font-size: 11px;
}

.site-footer p {
  margin: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms ease, transform 700ms ease;
}

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

@media (max-width: 1080px) {
  .section-band,
  .nav-shell,
  .site-footer {
    padding-left: var(--side-tablet);
    padding-right: var(--side-tablet);
  }

  .hero,
  .archive-layout,
  .material,
  .inquiry {
    grid-template-columns: 1fr;
  }

  .material {
    padding-left: var(--side-tablet);
    padding-right: var(--side-tablet);
  }

  .specimen-card {
    min-height: 560px;
  }

  .specimen-figure img {
    min-height: 560px;
  }

  .faq {
    grid-column: 1;
  }
}

@media (max-width: 760px) {
  .section-band {
    padding: var(--section-mobile) var(--side-mobile);
  }

  .nav-shell {
    padding: 14px var(--side-mobile);
  }

  .menu-button {
    display: block;
  }

  .nav-links {
    position: absolute;
    left: var(--side-mobile);
    right: var(--side-mobile);
    top: 62px;
    display: none;
    padding: 16px;
    background: var(--color-surface);
    border: var(--border-hairline);
  }

  .nav-links.is-open {
    display: grid;
  }

  .hero {
    padding-top: 54px;
    min-height: auto;
    gap: 44px;
  }

  h1 {
    font-size: clamp(54px, 17vw, 76px);
  }

  h2 {
    font-size: clamp(30px, 10vw, 42px);
  }

  .hero-index,
  .note-grid,
  .process-list,
  .site-footer {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-visual img {
    object-fit: contain;
    background: #293631;
  }

  .material {
    padding-left: var(--side-mobile);
    padding-right: var(--side-mobile);
  }

  .specimen-card {
    min-height: 500px;
  }

  .specimen-figure img {
    min-height: 500px;
  }

  .material-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .inquiry-form {
    padding: 24px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

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

/* Additional Differentiated Elements Styles */

/* 1. Specimen Switcher Tabs */
.archive-switcher {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-bottom: 48px;
  border-bottom: var(--border-hairline);
  padding-bottom: 12px;
}
.switcher-btn {
  background: transparent;
  border: 0;
  border-bottom: 1px solid transparent;
  color: var(--color-text-sub);
  padding: 8px 4px;
  cursor: pointer;
  font-family: var(--font-label);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.08em;
  transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}
.switcher-btn:hover {
  color: var(--color-primary);
}
.switcher-btn.is-active {
  color: var(--color-primary);
  border-color: var(--color-primary);
  font-weight: 500;
}
.specimen-card-container {
  width: 100%;
  min-height: 640px;
}
.specimen-card.is-hidden {
  display: none !important;
}

/* 2. Texture Detail Magnifier Lens */
.texture-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}
.texture-lens-container {
  position: relative;
  width: 100%;
  border: 1px solid rgba(244, 242, 236, 0.18);
  overflow: hidden;
  cursor: crosshair;
}
.texture-img {
  width: 100%;
  display: block;
  transition: transform 0.1s ease;
}
.lens-magnifier {
  position: absolute;
  border: 2px solid var(--color-surface);
  border-radius: 50%;
  cursor: none;
  width: 130px;
  height: 130px;
  display: none;
  background-repeat: no-repeat;
  pointer-events: none;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

/* 3. Infographic Composition Chart */
.composition-chart {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(244, 242, 236, 0.14);
  padding: 28px;
  border-radius: var(--radius-lg);
  margin-top: 24px;
}
.composition-chart h4 {
  font-family: var(--font-heading);
  font-size: 15px;
  margin: 0 0 20px;
  font-weight: 500;
  color: var(--color-surface);
}
.chart-item {
  display: grid;
  grid-template-columns: 140px 1fr 64px;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}
.chart-item:last-child {
  margin-bottom: 0;
}
.chart-item > span:first-child {
  font-size: 12px;
  color: color-mix(in srgb, var(--color-surface) 74%, transparent);
}
.chart-bar {
  height: 6px;
  background: rgba(244, 242, 236, 0.14);
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.chart-fill {
  display: block;
  height: 100%;
  background: var(--color-accent);
  border-radius: var(--radius-pill);
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.chart-val {
  font-family: var(--font-label);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-surface);
  text-align: right;
}

/* 4. FAQ Accordion */
.faq-accordion {
  grid-column: 2;
  width: 100%;
  border-top: var(--border-hairline);
  margin-top: 24px;
}
.faq-item {
  border-bottom: var(--border-hairline);
}
.faq-trigger {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--color-text-main);
  padding: 20px 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 500;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-icon {
  font-size: 18px;
  color: var(--color-primary);
  font-family: var(--font-label);
}
.faq-panel {
  padding: 0 0 20px;
  animation: slideIn Gyeol 0.3s ease forwards;
}
.faq-panel p {
  margin: 0;
  color: var(--color-text-sub);
  font-size: 14px;
  line-height: 1.8;
}

@keyframes slideInGyeol {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 1080px) {
  .faq-accordion {
    grid-column: 1;
  }
}
@media (max-width: 760px) {
  .archive-switcher {
    flex-wrap: wrap;
    gap: 8px;
  }
  .switcher-btn {
    padding: 6px 12px;
    font-size: 11px;
  }
  .specimen-card-container {
    min-height: 500px;
  }
  .chart-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .chart-val {
    text-align: left;
  }
}