:root {
  --bg: #f5f5f7;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(29, 29, 31, 0.08);
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --shadow: 0 24px 80px rgba(10, 18, 30, 0.12);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --container: min(1200px, calc(100% - 32px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans KR", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(0, 113, 227, 0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.9), transparent 35%),
    linear-gradient(180deg, #fbfbfd 0%, #eef1f5 100%);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2px clamp(12px, 2.3vw, 28px);
  backdrop-filter: blur(20px);
  background: rgba(251, 251, 253, 0.72);
  border-bottom: 1px solid var(--line);
}

.logo-wrap {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.logo-img {
  width: 108px;
  height: 108px;
  object-fit: contain;
}

.logo-text {
  font-size: 1.75rem;
}

.header-contact-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 92px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: inset 0 0 0 1px rgba(29, 29, 31, 0.1);
  font-size: 0.96rem;
  font-weight: 700;
  transition: transform 180ms ease, background-color 180ms ease;
}

.header-contact-link:hover,
.header-contact-link:focus-visible {
  transform: translateY(-1px);
  background: #ffffff;
}

main {
  overflow: hidden;
}

.hero,
.highlight-showcase,
.contact-section {
  width: var(--container);
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 56px);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: clamp(32px, 5vw, 64px);
  padding: clamp(48px, 8vw, 96px) 0;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
}

.hero h1,
.section-copy h2,
.showcase-head h2,
.contact-card h2,
.feature-copy h3 {
  font-family: "Gowun Dodum", sans-serif;
  margin: 0;
  letter-spacing: -0.05em;
  line-height: 1.05;
}

.hero h1 {
  font-size: clamp(3rem, 7vw, 5.8rem);
}

.hero-text,
.feature-copy p,
.contact-card p {
  color: var(--muted);
  line-height: 1.7;
}

.hero-text {
  max-width: 540px;
  margin: 20px 0 0;
  font-size: clamp(1rem, 1.6vw, 1.16rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 148px;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--accent);
  color: #fff;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--accent-hover);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.75);
  box-shadow: inset 0 0 0 1px rgba(29, 29, 31, 0.08);
}

.hero-visual {
  position: relative;
}

.device-frame {
  padding: 18px;
  border-radius: 40px;
  background: linear-gradient(145deg, #ffffff 0%, #dfe4ea 100%);
  box-shadow: var(--shadow);
}

.device-frame img {
  width: 100%;
  height: min(68vh, 760px);
  object-fit: cover;
  border-radius: 28px;
}

.floating-card {
  position: absolute;
  right: -24px;
  bottom: 42px;
  max-width: 280px;
  padding: 20px 22px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
  box-shadow: 0 18px 45px rgba(20, 20, 30, 0.12);
}

.floating-card strong,
.feature-copy h3 {
  display: block;
  margin-bottom: 8px;
  letter-spacing: -0.03em;
}

.floating-card span {
  color: var(--muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

.showcase-head h2,
.contact-card h2 {
  font-size: clamp(2.2rem, 4.8vw, 4.2rem);
}

.highlight-showcase {
  padding: clamp(64px, 10vw, 110px) 0;
}

.showcase-head {
  max-width: 820px;
  margin-bottom: 30px;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.feature-card {
  position: relative;
  min-height: 380px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: var(--surface-strong);
  box-shadow: var(--shadow);
}

.feature-card-large {
  grid-column: span 2;
  min-height: 560px;
}

.feature-card img {
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
}

.feature-copy {
  position: relative;
  z-index: 1;
  padding: 34px;
}

.feature-card-large .feature-copy {
  position: absolute;
  top: 0;
  left: 0;
  max-width: 560px;
  color: #fff;
}

.feature-card-large::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8, 8, 10, 0.68) 0%, rgba(8, 8, 10, 0.18) 52%, rgba(8, 8, 10, 0) 100%);
}

.feature-label {
  margin: 0 0 8px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent);
}

.feature-card-large .feature-label,
.feature-card-large .feature-copy p {
  color: rgba(255, 255, 255, 0.9);
}

.feature-copy h3 {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2.5rem);
}

.color-gallery-card {
  scroll-margin-top: 120px;
  background: linear-gradient(180deg, #0f1116 0%, #1c2028 100%);
}

.model-gallery-card {
  order: 1;
  justify-content: flex-start;
  min-height: 250px;
}

.model-gallery-card .color-gallery {
  margin-top: 1px;
}

.woodwork-model-gallery {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding: 1px 26px 28px;
}

.woodwork-model-gallery .color-tile,
.zero-truss-model-gallery .color-tile {
  height: 300px;
}

.woodwork-model-gallery .image-tile img,
.zero-truss-model-gallery .image-tile img {
  min-height: 0;
}

#cases {
  order: 2;
}

.color-gallery-card .feature-copy {
  position: relative;
  z-index: 2;
  max-width: 620px;
  color: #fff;
}

.color-gallery-card .feature-copy h3 {
  color: #fff;
  text-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
}

.construction-case-card .feature-copy {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px 22px;
  width: calc(100% - 68px);
  max-width: none;
}

.construction-case-card .feature-label {
  flex-basis: 100%;
  margin-bottom: 0;
}

.construction-case-card .feature-copy h3 {
  flex: 0 0 auto;
  margin: 0;
  order: 1;
}

.case-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  order: 2;
}

.case-tab {
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  padding: 8px 13px;
  background: transparent;
  color: rgba(255, 255, 255, 0.85);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}

.case-tab:hover,
.case-tab:focus-visible,
.case-tab.is-active {
  border-color: #fff;
  background: #fff;
  color: #111214;
}

.case-gallery[hidden] {
  display: none;
}

.case-placeholder-gallery {
  margin-top: 0;
}

.case-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 160px;
  border: 1px dashed rgba(255, 255, 255, 0.38);
  border-radius: 22px;
  color: rgba(255, 255, 255, 0.58);
  font-weight: 700;
}

.case-viewer {
  position: fixed;
  inset: 0;
  z-index: 2100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(7, 10, 16, 0.88);
}

.case-viewer.is-open {
  display: flex;
}

.case-viewer-panel {
  position: relative;
  width: min(920px, 100%);
  padding: clamp(24px, 5vw, 42px);
  border-radius: 28px;
  background: #171a20;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
}

.case-viewer-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 1.8rem;
  cursor: pointer;
}

.case-viewer-label {
  margin: 0 0 16px;
  color: #fff;
  font-family: "Gowun Dodum", sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
}

.case-viewer-content {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 20px;
  background: #0d0f13;
}

.case-viewer-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.case-viewer-placeholder {
  color: rgba(255, 255, 255, 0.52);
  font-size: 1rem;
  font-weight: 700;
}

.case-viewer-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 20px;
}

.case-viewer-nav {
  min-width: 84px;
  padding: 10px 16px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  background: transparent;
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.case-viewer-count {
  min-width: 52px;
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
}

.color-gallery-card .feature-label,
.color-gallery-card .feature-copy p {
  color: rgba(255, 255, 255, 0.88);
}

.color-gallery {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  padding: 12px 34px 34px;
  margin-top: auto;
}

.color-tile {
  overflow: hidden;
  min-height: 160px;
  border-radius: 22px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.16);
}

.image-tile img {
  width: 100%;
  height: 100%;
  min-height: 160px;
  object-fit: cover;
}

.color-red {
  background: #ff3b30;
}

.color-orange {
  background: #ff9500;
}

.color-yellow {
  background: #ffd60a;
}

.color-green {
  background: #34c759;
}

.color-blue {
  background: #0a84ff;
}

.color-navy {
  background: #243b85;
}

.contact-section {
  padding-bottom: 100px;
}

.contact-card {
  padding: clamp(36px, 7vw, 64px);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, #ffffff 0%, #eef4ff 100%);
  box-shadow: var(--shadow);
  text-align: center;
}

.contact-card p {
  max-width: 720px;
  margin: 18px auto 0;
}

.contact-form {
  max-width: 760px;
  margin: 34px auto 0;
  text-align: left;
}

.form-field {
  display: block;
  margin-bottom: 18px;
}

.hidden-field {
  display: none;
}

.form-field span {
  display: block;
  margin-bottom: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}

.form-field input,
.form-field textarea {
  width: 100%;
  border: 1px solid rgba(29, 29, 31, 0.12);
  border-radius: 18px;
  padding: 16px 18px;
  font: inherit;
  color: var(--text);
  background: rgba(255, 255, 255, 0.92);
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.form-field textarea {
  resize: vertical;
  min-height: 150px;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: rgba(0, 113, 227, 0.5);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.12);
}

.submit-button {
  margin-top: 10px;
}

.form-status {
  min-height: 24px;
  margin-top: 16px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent);
}

.site-footer {
  padding: 30px 16px 44px;
  color: var(--muted);
  text-align: center;
  font-size: 0.92rem;
}

.site-footer p {
  margin: 6px 0;
}

.image-tile {
  position: relative;
  cursor: zoom-in;
}

.model-caption {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 1;
  padding: 5px 9px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.62);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
}

.model-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #ffffff 0%, #edf0f3 100%);
  color: #7b828c;
  font-size: 0.9rem;
  font-weight: 700;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 28px;
  background: rgba(7, 10, 16, 0.88);
}

.lightbox.is-open {
  display: flex;
}

.lightbox-image {
  max-width: min(92vw, 1400px);
  max-height: 88vh;
  border-radius: 24px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

.lightbox-nav,
.lightbox-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
}

.lightbox-close {
  top: 22px;
  right: 22px;
}

.lightbox-nav {
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-prev {
  left: 22px;
}

.lightbox-next {
  right: 22px;
}

.lightbox-nav.is-hidden {
  display: none;
}

.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 700ms ease, transform 700ms ease;
}

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

@media (max-width: 960px) {
  .hero,
  .showcase-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 40px;
  }

  .hero-copy {
    order: 1;
  }

  .hero-visual {
    order: 2;
  }

  .floating-card {
    right: 16px;
    bottom: 18px;
  }

  .feature-card-large {
    grid-column: auto;
    min-height: 460px;
  }

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

@media (max-width: 720px) {
  .woodwork-model-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .model-gallery-card .color-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .model-gallery-card .color-tile {
    height: auto !important;
    min-height: 160px;
  }

  .model-gallery-card .image-tile img {
    height: auto !important;
    min-height: 160px !important;
  }

  .woodwork-model-gallery .color-tile,
  .zero-truss-model-gallery .color-tile {
    height: auto !important;
  }

  .site-header {
    gap: 16px;
    padding: 2px 12px;
  }

  .lightbox {
    padding: 16px;
  }

  .lightbox-close {
    top: 14px;
    right: 14px;
  }

  .lightbox-prev {
    left: 14px;
  }

  .lightbox-next {
    right: 14px;
  }

  .header-contact-link {
    min-width: 82px;
    padding: 6px 10px;
    font-size: 0.9rem;
  }

  .logo-wrap {
    gap: 12px;
  }

  .logo-img {
    width: 84px;
    height: 84px;
  }

  .logo-text {
    font-size: 1.3rem;
  }

  .hero h1 {
    font-size: clamp(2.6rem, 13vw, 4rem);
  }

  .feature-copy,
  .contact-card {
    padding-left: 22px;
    padding-right: 22px;
  }

  .color-gallery {
    gap: 12px;
    padding: 0 22px 22px;
  }

  .construction-case-card .feature-copy {
    width: calc(100% - 44px);
  }

  .case-tab {
    padding: 7px 11px;
    font-size: 0.82rem;
  }

  .color-tile {
    min-height: 120px;
    border-radius: 18px;
  }

  .case-placeholder {
    min-height: 120px;
    border-radius: 18px;
  }

  .image-tile img {
    min-height: 120px;
  }

  .device-frame {
    border-radius: 28px;
    padding: 12px;
  }

  .device-frame img {
    height: 440px;
    border-radius: 18px;
  }

  .floating-card {
    position: static;
    margin-top: 14px;
    max-width: none;
  }

  .contact-links {
    flex-direction: column;
    gap: 10px;
  }
}