:root {
  --page: #f5f5f7;
  --surface: #ffffff;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: #d2d2d7;
  --dark: #050506;
  --dark-text: #f5f5f7;
  --blue: #0071e3;
  --teal: #00a6a6;
  --orange: #f56300;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Apple SD Gothic Neo", "Pretendard", "Segoe UI", sans-serif;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  padding: 0 max(20px, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  background: rgba(245, 245, 247, 0.78);
  backdrop-filter: saturate(180%) blur(20px);
}

.brand {
  font-size: 0.9rem;
  font-weight: 700;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 22px;
}

nav {
  display: flex;
  gap: 24px;
  color: #424245;
  font-size: 0.78rem;
  font-weight: 500;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.54);
  color: #424245;
  font-size: 0.72rem;
  font-weight: 700;
}

.language-switch a,
.language-switch span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 24px;
  border-radius: 999px;
}

.language-switch .active {
  background: var(--ink);
  color: #fff;
}

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: clamp(36px, 7vw, 92px);
  align-items: center;
  width: min(100% - 40px, var(--max));
  min-height: calc(100svh - 48px);
  margin: 0 auto;
  padding: 64px 0 84px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--orange);
  font-size: 1rem;
  font-weight: 700;
}

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

h1 {
  margin-bottom: 24px;
  max-width: 760px;
  font-size: clamp(3rem, 7.4vw, 6.25rem);
  font-weight: 700;
  line-height: 1.06;
}

.hero-subtitle {
  max-width: 590px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.45rem);
  font-weight: 500;
  line-height: 1.68;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
}

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

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

.product-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 620px;
}

.halo {
  position: absolute;
  width: min(100%, 620px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 54% 38%, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0) 32%),
    radial-gradient(circle at 48% 46%, rgba(0, 113, 227, 0.24), rgba(0, 166, 166, 0.2) 48%, rgba(245, 99, 0, 0.12) 68%, transparent 72%);
  filter: blur(2px);
}

.product-stage img {
  position: relative;
  width: min(78%, 440px);
  aspect-ratio: 1;
  border-radius: 34px;
  object-fit: cover;
  box-shadow: 0 42px 90px rgba(0, 0, 0, 0.24);
}

.glass-spec {
  position: absolute;
  right: 2%;
  bottom: 16%;
  min-width: 210px;
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.62);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.14);
  backdrop-filter: blur(24px);
}

.glass-spec span {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.glass-spec strong {
  font-size: 1.3rem;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  width: min(100% - 40px, var(--max));
  margin: -42px auto 96px;
}

.metrics article,
.project-card {
  border-radius: 28px;
  background: var(--surface);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.08);
}

.metrics article {
  min-height: 210px;
  padding: 28px;
}

.metrics span {
  display: block;
  margin-bottom: 42px;
  color: var(--blue);
  font-size: 0.86rem;
  font-weight: 700;
}

.metrics strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.45rem;
  font-weight: 700;
}

.metrics p {
  margin-bottom: 0;
  color: var(--muted);
  font-weight: 500;
  line-height: 1.68;
}

.feature {
  width: min(100% - 40px, var(--max));
  margin: 0 auto 96px;
  border-radius: 36px;
  padding: clamp(44px, 7vw, 84px);
}

.feature.dark {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: center;
  background: var(--dark);
  color: var(--dark-text);
}

.feature.light {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.62)),
    linear-gradient(115deg, rgba(0, 113, 227, 0.18), rgba(0, 166, 166, 0.14), rgba(245, 99, 0, 0.12));
}

.feature h2,
.section-heading h2 {
  margin-bottom: 20px;
  font-size: clamp(2.35rem, 5.3vw, 4.6rem);
  font-weight: 700;
  line-height: 1.08;
}

.feature p:not(.eyebrow) {
  max-width: 690px;
  margin-bottom: 0;
  color: #86868b;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 500;
  line-height: 1.76;
}

.feature.dark p:not(.eyebrow) {
  color: #a1a1a6;
}

.feature-visual {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.feature-visual span {
  display: grid;
  place-items: end start;
  min-height: 170px;
  padding: 22px;
  border-radius: 26px;
  background: linear-gradient(145deg, #1d1d1f, #101012);
  color: #f5f5f7;
  font-size: clamp(1.15rem, 2vw, 1.7rem);
  font-weight: 700;
}

.feature-visual span:nth-child(2) {
  background: linear-gradient(145deg, #003b6f, #001d38);
}

.feature-visual span:nth-child(3) {
  background: linear-gradient(145deg, #00645f, #012d2b);
}

.feature-visual span:nth-child(4) {
  background: linear-gradient(145deg, #7a3100, #2a1200);
}

.section,
.specs {
  width: min(100% - 40px, var(--max));
  margin: 0 auto 96px;
}

.section-heading {
  margin-bottom: 28px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.project-card {
  display: flex;
  flex-direction: column;
  min-height: 330px;
  padding: 30px;
  transition:
    box-shadow 180ms ease,
    transform 180ms ease;
}

.project-card:hover,
.project-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 24px 58px rgba(0, 0, 0, 0.12);
}

.project-card:focus-visible {
  outline: 3px solid rgba(0, 113, 227, 0.32);
  outline-offset: 4px;
}

.project-card p {
  margin-bottom: 18px;
  color: var(--blue);
  font-size: 0.94rem;
  font-weight: 700;
}

.project-card h3 {
  margin-bottom: 22px;
  font-size: clamp(1.55rem, 3vw, 2.3rem);
  font-weight: 700;
  line-height: 1.22;
}

.project-card span {
  margin-top: auto;
  color: var(--muted);
  font-size: 0.98rem;
  font-weight: 500;
}

.project-card-cta {
  align-self: flex-start;
  margin-top: 24px;
  color: var(--blue);
  font-weight: 600;
}

.project-more {
  display: flex;
  justify-content: center;
  margin-top: 28px;
  text-align: center;
}

.project-more .button {
  margin-inline: auto;
}

.project-article {
  width: min(100% - 40px, 860px);
  margin: 0 auto;
  padding: 88px 0 112px;
}

.project-article .eyebrow {
  margin-bottom: 16px;
}

.project-article h1 {
  margin-bottom: 22px;
  font-size: clamp(2.7rem, 6vw, 5.2rem);
}

.project-lead {
  margin-bottom: 34px;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  font-weight: 500;
  line-height: 1.72;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 56px;
}

.project-tags span {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: #424245;
  font-size: 0.9rem;
  font-weight: 650;
}

.project-section {
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

.project-section h2 {
  margin-bottom: 14px;
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  line-height: 1.24;
}

.project-section p,
.project-section li {
  color: #424245;
  font-size: 1.04rem;
  font-weight: 500;
  line-height: 1.78;
}

.project-section p:last-child,
.project-section ul:last-child {
  margin-bottom: 0;
}

.project-section ul {
  padding-left: 22px;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.report-article {
  width: min(100% - 40px, 980px);
  margin: 0 auto;
  padding: 72px 0 112px;
}

.project-archive {
  width: min(100% - 40px, var(--max));
}

.report-hero {
  padding-bottom: 42px;
  border-bottom: 1px solid var(--line);
}

.report-kicker {
  margin-bottom: 14px;
  color: var(--orange);
  font-size: 0.95rem;
  font-weight: 750;
}

.report-hero h1 {
  margin-bottom: 24px;
  font-size: clamp(2.4rem, 5.6vw, 5rem);
  line-height: 1.08;
}

.report-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin: 28px 0 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--line);
}

.report-meta div {
  padding: 16px;
  background: rgba(255, 255, 255, 0.84);
}

.report-meta dt {
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.report-meta dd {
  margin: 0;
  color: #1d1d1f;
  font-size: 0.96rem;
  font-weight: 650;
}

.report-summary {
  margin-top: 34px;
  padding: 26px;
  border: 1px solid rgba(0, 113, 227, 0.18);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.72);
}

.report-summary h2 {
  margin-bottom: 12px;
  font-size: 1.35rem;
}

.report-body {
  position: relative;
  margin-top: 42px;
}

.report-toc {
  width: auto;
  margin-bottom: 32px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.09);
  backdrop-filter: saturate(180%) blur(18px);
}

.report-toc strong {
  display: block;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.report-toc a {
  display: inline-flex;
  margin-right: 14px;
  padding: 7px 0;
  color: #424245;
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.35;
}

.report-toc a:hover {
  color: var(--blue);
}

.report-content {
  min-width: 0;
}

.report-section {
  padding: 42px 0;
  border-top: 1px solid var(--line);
}

.report-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.report-section h2 {
  margin-bottom: 20px;
  font-size: clamp(1.75rem, 3.8vw, 2.75rem);
  line-height: 1.16;
}

.report-section h3 {
  margin: 30px 0 12px;
  font-size: clamp(1.18rem, 2vw, 1.55rem);
  line-height: 1.32;
}

.report-section p,
.report-section li {
  color: #3a3a3c;
  font-size: 1.04rem;
  font-weight: 500;
  line-height: 1.82;
}

.project-section code,
.report-section code {
  display: inline-block;
  max-width: 100%;
  padding: 0.08em 0.38em 0.12em;
  border: 1px solid rgba(0, 113, 227, 0.16);
  border-radius: 7px;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.92),
    rgba(0, 113, 227, 0.07)
  );
  color: #0a5fbd;
  font-family: inherit;
  font-size: 0.94em;
  font-weight: 680;
  line-height: 1.35;
  overflow-wrap: anywhere;
  vertical-align: 0.04em;
}

.report-code {
  margin: 26px 0;
  overflow-x: auto;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #111113;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.12);
}

.report-code code {
  display: block;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: #f5f5f7;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.72;
  white-space: pre;
}

.report-table-wrap {
  overflow-x: auto;
  margin: 26px 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.08);
}

.report-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
}

.report-table td,
.report-table th {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  color: #3a3a3c;
  font-size: 0.94rem;
  font-weight: 500;
  line-height: 1.55;
  text-align: left;
  vertical-align: top;
}

.report-table tr:last-child td {
  border-bottom: 0;
}

.report-section p {
  margin-bottom: 16px;
}

.project-archive .project-card p {
  margin-bottom: 18px;
  color: var(--blue);
  font-size: 0.94rem;
  font-weight: 700;
  line-height: normal;
}

.project-archive .project-card h3 {
  margin: 0 0 22px;
  font-size: clamp(1.55rem, 3vw, 2.3rem);
  font-weight: 700;
  line-height: 1.22;
}

.project-archive .project-card span {
  margin-top: auto;
  color: var(--muted);
  font-size: 0.98rem;
  font-weight: 500;
  line-height: normal;
}

.report-section ul,
.report-section ol {
  padding-left: 22px;
}

.report-section li + li {
  margin-top: 9px;
}

.report-label-list {
  display: grid;
  gap: 12px;
  padding-left: 0;
  list-style: none;
}

.report-label-list li {
  padding: 16px 18px;
  border-left: 3px solid var(--blue);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
}

.report-figure {
  margin: 30px 0;
}

.report-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.08);
}

.report-figure figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
  text-align: center;
}

.report-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 42px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.references-list {
  padding-left: 22px;
}

@media (min-width: 1500px) {
  .report-toc {
    position: fixed;
    top: 76px;
    left: max(18px, calc((100vw - var(--max)) / 2 - 250px));
    z-index: 5;
    width: 220px;
    margin-bottom: 0;
  }

  .report-toc a {
    display: block;
    margin-right: 0;
  }
}

@media (max-width: 900px) {
  .report-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.spec-list {
  margin: 0;
  border-top: 1px solid var(--line);
}

.spec-list div {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.spec-list dt {
  color: var(--muted);
  font-weight: 600;
}

.spec-list dd {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.72;
}

.spec-list dd a {
  margin-right: 18px;
  color: var(--blue);
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 700ms ease, transform 700ms ease;
}

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

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

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

@media (max-width: 820px) {
  .topbar-actions {
    gap: 14px;
  }

  nav {
    gap: 14px;
  }

  .hero,
  .feature.dark,
  .metrics,
  .project-grid {
    grid-template-columns: 1fr;
  }

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

  .product-stage {
    min-height: 430px;
  }

  .glass-spec {
    right: 0;
    bottom: 6%;
  }

  .metrics {
    margin-top: 0;
  }

  .feature,
  .metrics article,
  .project-card {
    border-radius: 24px;
  }

  .feature-visual {
    grid-template-columns: 1fr;
  }

  .feature-visual span {
    min-height: 120px;
  }

  .spec-list div {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 520px) {
  .topbar {
    padding: 0 16px;
  }

  nav a:nth-child(2) {
    display: none;
  }

  .language-switch a,
  .language-switch span {
    min-width: 28px;
  }

  .hero,
  .metrics,
  .feature,
  .section,
  .project-archive,
  .specs {
    width: min(100% - 28px, var(--max));
  }

  h1 {
    font-size: 2.75rem;
  }

  .product-stage img {
    width: min(84%, 320px);
    border-radius: 26px;
  }

  .feature,
  .metrics article,
  .project-card {
    padding: 24px;
  }
}