@font-face {
  font-family: "Rajdhani";
  src: url("/fonts/Rajdhani-Bold.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

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

:root {
  --navy-950: #070e22;
  --navy-900: #0d1732;
  --navy-800: #172544;
  --ink: #142248;
  --muted: #647595;
  --line: #d8e0ee;
  --surface: #ffffff;
  --surface-muted: #eef3fa;
  --canvas: #f5f7fb;
  --cyan: #23afe1;
  --cyan-soft: #d9f4ff;
  --violet: #6751e8;
  --coral: #f36f7e;
  --yellow: #f3bf41;
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 30px;
  --shadow: 0 24px 70px rgba(10, 25, 58, 0.12);
  --page: min(1480px, calc(100vw - 48px));
}

* {
  box-sizing: border-box;
}

html {
  background: var(--canvas);
  color: var(--ink);
  font-family: "Pretendard", system-ui, sans-serif;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(135deg, rgba(35, 175, 225, 0.045) 0 12%, transparent 12% 100%),
    var(--canvas);
}

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

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

.skip-link {
  position: fixed;
  z-index: 99;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  transform: translateY(-150%);
  border-radius: 8px;
  background: var(--navy-950);
  color: white;
}

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

.page-shell {
  min-height: 100vh;
  overflow: hidden;
}

.site-header {
  width: var(--page);
  min-height: 92px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 38px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand__mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 10px;
  background: var(--navy-900);
  color: white;
  font-family: "Rajdhani", sans-serif;
  font-size: 24px;
  line-height: 1;
}

.brand__name,
.alpha-tag,
.site-nav__link,
.eyebrow,
h1,
h2,
h3,
.button,
.release-status,
.resource-count,
.card-kicker,
.resource-row small,
.resource-row__index,
.resource-row__language,
.timeline-entry__date,
.site-footer__brand {
  font-family: "Rajdhani", "Pretendard", sans-serif;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.brand__name {
  font-size: 21px;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.site-nav__link {
  position: relative;
  padding: 12px 14px;
  color: var(--muted);
  font-size: 14px;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  right: 14px;
  bottom: 5px;
  left: 14px;
  height: 2px;
  transform: scaleX(0);
  background: var(--cyan);
  transition: transform 140ms ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__link.is-current {
  color: var(--ink);
}

.site-nav__link.is-current::after {
  transform: scaleX(1);
}

.alpha-tag {
  padding: 8px 13px;
  border: 1px solid rgba(103, 81, 232, 0.26);
  border-radius: 999px;
  background: rgba(103, 81, 232, 0.08);
  color: var(--violet);
  font-size: 12px;
}

main {
  width: var(--page);
  margin: 0 auto;
}

.hero {
  min-height: 720px;
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(560px, 1.15fr);
  align-items: center;
  gap: 70px;
  padding: 72px 0 92px;
}

.eyebrow {
  margin-bottom: 20px;
  color: var(--cyan);
  font-size: 15px;
}

.hero h1,
.page-hero h1 {
  margin-bottom: 28px;
  color: var(--navy-900);
  font-size: clamp(68px, 7.2vw, 118px);
  line-height: 0.83;
  letter-spacing: 0.01em;
}

.hero__lead,
.page-hero__lead {
  max-width: 640px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.button {
  min-height: 54px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 26px;
  border: 1px solid var(--line);
  border-radius: 14px;
  font-size: 15px;
  transition:
    transform 140ms ease,
    background 140ms ease,
    border-color 140ms ease;
}

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

.button:focus-visible,
.resource-row:focus-visible,
.site-nav__link:focus-visible,
.brand:focus-visible {
  outline: 3px solid rgba(35, 175, 225, 0.34);
  outline-offset: 3px;
}

.button--primary {
  border-color: var(--violet);
  background: var(--violet);
  color: white;
}

.button--ghost {
  background: rgba(255, 255, 255, 0.7);
}

.hero__facts {
  margin: 36px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
}

.hero__facts li {
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--muted);
  font-family: "Rajdhani", sans-serif;
  font-size: 13px;
  font-weight: 700;
}

.select-preview {
  position: relative;
  overflow: hidden;
  min-height: 510px;
  padding: 26px;
  border: 1px solid rgba(138, 157, 193, 0.38);
  border-radius: var(--radius-lg);
  background: var(--navy-900);
  box-shadow: var(--shadow);
  color: white;
}

.select-preview::before,
.select-preview::after {
  content: "";
  position: absolute;
  pointer-events: none;
  transform: rotate(-30deg);
}

.select-preview::before {
  top: -80px;
  right: -90px;
  width: 320px;
  height: 100px;
  background: var(--coral);
}

.select-preview::after {
  right: -100px;
  bottom: 50px;
  width: 360px;
  height: 70px;
  background: rgba(103, 81, 232, 0.56);
}

.select-preview__top,
.select-preview__bottom {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: "Rajdhani", sans-serif;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.select-preview__top {
  padding-bottom: 22px;
  font-size: 20px;
}

.select-preview__tools {
  display: flex;
  gap: 8px;
}

.select-preview__tools i {
  width: 44px;
  height: 22px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.select-preview__body {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 20px;
}

.select-preview__info {
  padding: 14px;
  border-radius: 18px;
  background: rgba(3, 8, 20, 0.72);
}

.jacket-motif {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 12px;
  background:
    linear-gradient(140deg, transparent 0 28%, var(--cyan) 28% 42%, transparent 42% 59%, var(--coral) 59% 70%, transparent 70%),
    #111c39;
}

.jacket-motif span {
  font-family: "Rajdhani", sans-serif;
  font-size: 74px;
  font-weight: 700;
}

.select-preview__info p {
  margin: 16px 0 10px;
  font-family: "Rajdhani", sans-serif;
  font-size: 18px;
  font-weight: 700;
}

.select-preview__info strong {
  display: block;
  color: var(--cyan);
  font-family: "Rajdhani", sans-serif;
  font-size: 28px;
}

.select-preview__info small {
  color: #aebbd3;
}

.track-list {
  display: grid;
  gap: 10px;
}

.track {
  min-height: 64px;
  padding: 0 18px;
  display: grid;
  grid-template-columns: 34px 1fr 36px;
  align-items: center;
  gap: 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--navy-900);
}

.track b,
.track span {
  font-family: "Rajdhani", sans-serif;
  font-weight: 700;
}

.track b {
  color: var(--violet);
  font-size: 20px;
}

.track span {
  font-size: 18px;
}

.track em {
  width: 24px;
  height: 5px;
  justify-self: end;
  border-radius: 999px;
  background: var(--cyan);
}

.track.is-selected {
  background: var(--violet);
  color: white;
}

.track.is-selected b {
  color: white;
}

.select-preview__bottom {
  position: absolute;
  z-index: 2;
  right: 26px;
  bottom: 22px;
  left: 226px;
  justify-content: flex-end;
  gap: 8px;
}

.select-preview__bottom span {
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 11px;
}

.feature-section {
  padding: 110px 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: 0.55fr 1.45fr;
  gap: 40px;
  margin-bottom: 56px;
}

.section-heading h2 {
  margin-bottom: 0;
  color: var(--navy-900);
  font-size: clamp(38px, 4vw, 66px);
  line-height: 1.05;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-card {
  min-height: 280px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.75);
}

.feature-card > span {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 10px;
  background: var(--surface-muted);
  color: var(--violet);
  font-family: "Rajdhani", sans-serif;
  font-weight: 700;
}

.feature-card h3 {
  margin: 60px 0 12px;
  font-size: 27px;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.page-hero {
  min-height: 390px;
  padding: 92px 0 74px;
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  font-size: clamp(64px, 8vw, 110px);
}

.page-hero--split {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 60px;
}

.release-status {
  min-width: 250px;
  padding: 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: white;
}

.release-status__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--cyan);
}

.release-status small,
.release-status strong {
  display: block;
}

.release-status small {
  color: var(--muted);
  font-size: 11px;
}

.release-status strong {
  margin-top: 4px;
  font-size: 22px;
}

.content-grid {
  padding: 58px 0;
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 16px;
}

.content-card,
.prose-card {
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.content-card h2,
.prose-card h2 {
  color: var(--navy-900);
  font-size: 30px;
}

.card-kicker {
  color: var(--violet);
  font-size: 13px;
}

.check-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding: 16px 0 16px 34px;
  position: relative;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.check-list li::before {
  content: "";
  position: absolute;
  top: 21px;
  left: 3px;
  width: 12px;
  height: 12px;
  border: 2px solid #aab6ca;
  border-radius: 50%;
}

.check-list li.is-done {
  color: var(--ink);
}

.check-list li.is-done::before {
  border-color: var(--cyan);
  background: var(--cyan);
  box-shadow: inset 0 0 0 3px white;
}

.install-list {
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  list-style: none;
}

.install-list li {
  padding: 20px;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-muted);
}

.install-list > li > span {
  color: var(--cyan);
  font-family: "Rajdhani", sans-serif;
  font-size: 24px;
  font-weight: 700;
}

.install-list strong {
  color: var(--navy-900);
}

.install-list p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.checksum {
  margin-top: 24px;
  padding: 18px;
  border-radius: 12px;
  background: var(--surface-muted);
}

.checksum small,
.checksum code {
  display: block;
}

.checksum small {
  margin-bottom: 8px;
  color: var(--muted);
  font-family: "Rajdhani", sans-serif;
  font-weight: 700;
}

.checksum code {
  overflow-wrap: anywhere;
  color: var(--ink);
  font-size: 11px;
  line-height: 1.6;
}

.spec-list {
  margin: 0;
}

.spec-list div {
  padding: 18px 0;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--line);
}

.spec-list dt {
  color: var(--muted);
  font-family: "Rajdhani", sans-serif;
  font-weight: 700;
}

.spec-list dd {
  margin: 0;
  text-align: right;
}

.notice-strip {
  margin: 0 0 90px;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  gap: 22px;
  border-left: 5px solid var(--cyan);
  border-radius: 0 12px 12px 0;
  background: var(--cyan-soft);
}

.notice-strip span {
  color: var(--muted);
  font-size: 14px;
}

.step-list {
  padding: 58px 0;
  display: grid;
  gap: 12px;
}

.step {
  padding: 28px 34px;
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 26px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}

.step__number {
  color: var(--cyan);
  font-family: "Rajdhani", sans-serif;
  font-size: 34px;
  font-weight: 700;
}

.step h2 {
  margin-bottom: 8px;
  font-size: 25px;
}

.step p {
  max-width: 840px;
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.75;
}

.resource-count {
  display: flex;
  align-items: center;
  gap: 16px;
}

.resource-count strong {
  color: var(--violet);
  font-size: 72px;
  line-height: 0.8;
}

.resource-count span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.resource-list {
  padding: 52px 0;
  display: grid;
  gap: 12px;
}

.resource-row {
  min-height: 160px;
  padding: 28px 30px;
  display: grid;
  grid-template-columns: 64px 1fr auto 38px;
  align-items: center;
  gap: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  transition:
    transform 140ms ease,
    border-color 140ms ease,
    box-shadow 140ms ease;
}

.resource-row:hover {
  transform: translateY(-2px);
  border-color: rgba(103, 81, 232, 0.5);
  box-shadow: 0 18px 40px rgba(10, 25, 58, 0.07);
}

.resource-row__index {
  color: var(--cyan);
  font-size: 27px;
}

.resource-row__main small {
  color: var(--violet);
  font-size: 11px;
}

.resource-row__main h2 {
  margin: 5px 0 7px;
  font-size: 27px;
}

.resource-row__main p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.resource-row__language {
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--muted);
  font-size: 11px;
}

.resource-row__arrow {
  font-size: 24px;
}

.legal-note,
.prose-card {
  max-width: 1000px;
  margin: 0 0 94px;
}

.legal-note {
  padding: 32px 0 0;
  border-top: 1px solid var(--line);
}

.legal-note h2 {
  font-size: 23px;
}

.legal-note p,
.prose-card p {
  color: var(--muted);
  line-height: 1.85;
}

.prose-card {
  margin-top: 56px;
}

.prose-card h2:not(:first-child) {
  margin-top: 36px;
}

.timeline {
  padding: 60px 0 96px;
}

.timeline-entry {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
}

.timeline-entry__date {
  padding: 24px;
  border-radius: 16px;
  background: var(--navy-900);
  color: white;
}

.timeline-entry__date span,
.timeline-entry__date strong {
  display: block;
}

.timeline-entry__date span {
  color: #8797b4;
  font-size: 12px;
}

.timeline-entry__date strong {
  margin-top: 6px;
  color: var(--cyan);
  font-size: 30px;
}

.timeline-entry__body {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: white;
}

.timeline-entry__body h2 {
  font-size: 30px;
}

.timeline-entry__body ul {
  margin: 22px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.9;
}

.site-footer {
  background: var(--navy-950);
  color: white;
}

.site-footer__inner {
  width: var(--page);
  min-height: 190px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 50px;
}

.site-footer__brand {
  margin-bottom: 7px;
  font-size: 21px;
}

.site-footer__copy,
.site-footer__legal {
  margin: 0;
  color: #7f8ba6;
  font-size: 12px;
}

.site-footer nav {
  display: flex;
  gap: 24px;
  color: #aab5cc;
  font-family: "Rajdhani", sans-serif;
  font-size: 13px;
  font-weight: 700;
}

@media (max-width: 1050px) {
  :root {
    --page: min(100% - 34px, 900px);
  }

  .site-header {
    grid-template-columns: 1fr auto;
    gap: 18px;
  }

  .site-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 12px;
  }

  .alpha-tag {
    grid-column: 2;
    grid-row: 1;
  }

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

  .select-preview {
    min-height: 500px;
  }

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

  .page-hero--split {
    grid-template-columns: 1fr;
  }

  .release-status {
    width: fit-content;
  }
}

@media (max-width: 700px) {
  :root {
    --page: calc(100% - 24px);
    --radius-lg: 22px;
  }

  .site-header {
    min-height: 76px;
  }

  .brand__name {
    font-size: 18px;
  }

  .site-nav__link {
    padding-inline: 10px;
  }

  .hero {
    min-height: auto;
    gap: 54px;
    padding: 62px 0 72px;
  }

  .hero h1,
  .page-hero h1 {
    font-size: clamp(56px, 18vw, 82px);
  }

  .hero__lead,
  .page-hero__lead {
    font-size: 16px;
  }

  .hero__actions {
    display: grid;
  }

  .select-preview {
    min-height: 480px;
    padding: 18px;
  }

  .select-preview__body {
    grid-template-columns: 104px 1fr;
    gap: 10px;
  }

  .select-preview__info {
    padding: 8px;
  }

  .select-preview__info p {
    font-size: 13px;
  }

  .select-preview__info strong {
    font-size: 21px;
  }

  .select-preview__info small {
    display: none;
  }

  .track {
    min-height: 58px;
    padding: 0 10px;
    grid-template-columns: 24px 1fr;
  }

  .track span {
    overflow: hidden;
    font-size: 14px;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .track em {
    display: none;
  }

  .select-preview__bottom {
    right: 18px;
    bottom: 18px;
    left: 132px;
  }

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

  .page-hero {
    min-height: 340px;
    padding-top: 70px;
  }

  .notice-strip {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .step {
    padding: 24px;
    grid-template-columns: 48px 1fr;
    gap: 12px;
  }

  .resource-count {
    justify-content: flex-start;
  }

  .resource-row {
    padding: 24px;
    grid-template-columns: 40px 1fr 26px;
    gap: 12px;
  }

  .resource-row__language {
    display: none;
  }

  .resource-row__main p {
    font-size: 13px;
    line-height: 1.6;
  }

  .timeline-entry {
    grid-template-columns: 1fr;
  }

  .timeline-entry__date {
    width: 150px;
  }

  .site-footer__inner {
    padding: 42px 0;
    grid-template-columns: 1fr;
    gap: 24px;
  }
}