:root {
  color-scheme: light;
  --navy: #061a3f;
  --blue: #1269f3;
  --blue-strong: #0754dc;
  --blue-soft: #eaf2ff;
  --text-muted: #61708b;
  --line: rgba(15, 74, 171, 0.14);
  --page-padding: clamp(24px, 5vw, 84px);
}

* {
  box-sizing: border-box;
}

img {
  max-width: 100%;
  -webkit-touch-callout: none;
  -webkit-user-drag: none;
  user-select: none;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
  -webkit-touch-callout: none;
  background:
    radial-gradient(circle at 82% 38%, rgba(42, 129, 255, 0.11), transparent 31rem),
    radial-gradient(circle at 7% 93%, rgba(86, 172, 255, 0.09), transparent 26rem),
    linear-gradient(135deg, #ffffff 0%, #f8fbff 55%, #f1f7ff 100%);
  color: var(--navy);
  font-family: "Pretendard", "Noto Sans KR", "Malgun Gothic", "Apple SD Gothic Neo", sans-serif;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(rgba(22, 105, 243, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 105, 243, 0.025) 1px, transparent 1px);
  background-size: 52px 52px;
  content: "";
  mask-image: linear-gradient(to bottom, transparent, #000 24%, #000 75%, transparent);
}

.page-shell {
  width: min(100%, 1600px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 116px var(--page-padding) 0;
  display: grid;
  grid-template-rows: 1fr auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 50;
  width: 100%;
  min-height: 116px;
  border-bottom: 1px solid transparent;
  transition: min-height 220ms ease, border-color 220ms ease;
}

.header-content {
  width: min(100%, 1600px);
  min-height: inherit;
  margin: 0 auto;
  padding: 0 var(--page-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  transition: border-color 220ms ease;
}

.site-header::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  border-bottom: 1px solid rgba(15, 74, 171, 0.12);
  background: rgba(251, 253, 255, 0.9);
  box-shadow: 0 10px 34px rgba(10, 55, 124, 0.09);
  content: "";
  opacity: 0;
  backdrop-filter: blur(18px);
  transition: opacity 220ms ease;
}

.site-header.is-scrolled {
  min-height: 72px;
  border-color: transparent;
}

.site-header.is-scrolled .header-content {
  border-color: transparent;
}

.site-header.is-scrolled::before {
  opacity: 1;
}

.brand-lockup {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 0;
  transition: gap 220ms ease;
}

.brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  width: clamp(150px, 13vw, 208px);
  transition: width 220ms ease;
}

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

.brand-divider {
  width: 1px;
  max-width: 0;
  height: 30px;
  background: var(--line);
  opacity: 0;
  transition: opacity 180ms ease;
}

.header-product-logo {
  display: block;
  width: clamp(138px, 13vw, 190px);
  max-width: 0;
  height: auto;
  opacity: 0;
  transform: translateX(-10px);
  visibility: hidden;
  transition: max-width 220ms ease, opacity 180ms ease, transform 220ms ease, visibility 0s linear 220ms;
}

.site-header.is-scrolled .brand {
  width: 132px;
}

.site-header.is-scrolled .brand-divider,
.site-header.is-scrolled .header-product-logo {
  opacity: 1;
}

.site-header.is-scrolled .brand-lockup {
  gap: 18px;
}

.site-header.is-scrolled .brand-divider {
  max-width: 1px;
}

.site-header.is-scrolled .header-product-logo {
  max-width: 190px;
  transform: translateX(0);
  visibility: visible;
  transition-delay: 0s;
}

.admin-link {
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid rgba(6, 26, 63, 0.12);
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 8px 24px rgba(14, 68, 154, 0.08);
  color: var(--navy);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  backdrop-filter: blur(12px);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.admin-link svg {
  width: 17px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.admin-link:hover {
  transform: translateY(-2px);
  border-color: rgba(18, 105, 243, 0.32);
  box-shadow: 0 12px 28px rgba(14, 68, 154, 0.13);
}

.admin-link:focus-visible {
  outline: 3px solid rgba(18, 105, 243, 0.25);
  outline-offset: 3px;
}

.mobile-label {
  display: none;
}

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

.hero {
  position: relative;
  min-height: 660px;
  padding: clamp(70px, 10vh, 132px) 0;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(400px, 0.95fr);
  align-items: center;
  gap: clamp(36px, 7vw, 112px);
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 28px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--blue-strong);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 7px rgba(18, 105, 243, 0.09);
}

.product-type {
  margin: 0 0 24px;
  color: #48617f;
  font-size: clamp(17px, 1.45vw, 23px);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.product-logo {
  display: block;
  width: min(100%, 620px);
  height: auto;
  margin: 0 0 30px;
}

h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(46px, 5vw, 80px);
  font-weight: 750;
  letter-spacing: -0.055em;
  line-height: 1.16;
}

.headline-line {
  display: block;
  white-space: nowrap;
}

.description {
  max-width: 590px;
  margin: 28px 0 0;
  color: var(--text-muted);
  font-size: clamp(15px, 1.2vw, 18px);
  font-weight: 500;
  line-height: 1.8;
  word-break: keep-all;
}

.sound-field {
  position: relative;
  width: min(38vw, 560px);
  aspect-ratio: 1;
  justify-self: center;
  filter: drop-shadow(0 30px 60px rgba(20, 94, 205, 0.13));
}

.orbit {
  position: absolute;
  border-radius: 50%;
}

.orbit-outer {
  inset: 4%;
  border: 1px solid rgba(18, 105, 243, 0.18);
  background: radial-gradient(circle, rgba(255, 255, 255, 0.88) 0 34%, rgba(231, 241, 255, 0.55) 35% 62%, rgba(255, 255, 255, 0.2) 63%);
  box-shadow: inset 0 0 80px rgba(18, 105, 243, 0.08);
}

.orbit-inner {
  inset: 25%;
  border: 1px dashed rgba(18, 105, 243, 0.24);
}

.center-mark {
  position: absolute;
  inset: 36%;
  z-index: 2;
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: 34%;
  overflow: hidden;
  background: #ffffff;
  box-shadow: 0 22px 50px rgba(22, 91, 199, 0.17), inset 0 1px 0 #fff;
}

.center-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.channel {
  --dot-size: clamp(18px, 2vw, 29px);
  position: absolute;
  z-index: 3;
  width: var(--dot-size);
  height: var(--dot-size);
  border: 5px solid rgba(255, 255, 255, 0.92);
  border-radius: 50%;
  background: linear-gradient(135deg, #3f95ff, #0860ed);
  box-shadow: 0 8px 22px rgba(8, 92, 224, 0.25);
}

.channel-1 { left: calc(50% - var(--dot-size) / 2); top: 0; }
.channel-2 { right: 12%; top: 13%; }
.channel-3 { right: 0; top: calc(50% - var(--dot-size) / 2); }
.channel-4 { right: 12%; bottom: 13%; }
.channel-5 { left: calc(50% - var(--dot-size) / 2); bottom: 0; }
.channel-6 { left: 12%; bottom: 13%; }
.channel-7 { left: 0; top: calc(50% - var(--dot-size) / 2); }
.channel-8 { left: 12%; top: 13%; }

.scroll-cue {
  position: absolute;
  bottom: 24px;
  left: 50%;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: #71819b;
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  transform: translateX(-50%);
}

.scroll-cue svg {
  width: 20px;
  fill: none;
  stroke: var(--blue);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.development {
  min-height: 760px;
  padding: clamp(104px, 11vw, 160px) 0 clamp(110px, 12vw, 180px);
  border-top: 1px solid var(--line);
  scroll-margin-top: 72px;
}

.development-heading {
  max-width: 790px;
  margin: 0 auto 60px;
  text-align: center;
}

.section-kicker {
  margin: 0 0 22px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--blue-strong);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}

.section-kicker span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 7px rgba(18, 105, 243, 0.09);
}

.development h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(36px, 4.2vw, 62px);
  letter-spacing: -0.055em;
  line-height: 1.18;
}

.development-heading > p:last-child {
  margin: 24px 0 0;
  color: var(--text-muted);
  font-size: clamp(15px, 1.4vw, 19px);
  font-weight: 500;
  line-height: 1.8;
  word-break: keep-all;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  min-height: 230px;
  padding: 34px;
  border: 1px solid rgba(18, 105, 243, 0.13);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 18px 46px rgba(24, 82, 164, 0.07);
  backdrop-filter: blur(12px);
}

.feature-number {
  display: block;
  margin-bottom: 36px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.feature-card h3 {
  margin: 0 0 14px;
  color: var(--navy);
  font-size: clamp(20px, 1.7vw, 26px);
  letter-spacing: -0.035em;
}

.feature-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.75;
  word-break: keep-all;
}

.release-notice {
  max-width: 790px;
  min-height: 112px;
  margin: 34px auto 0;
  padding: 22px 30px;
  border: 1px solid rgba(18, 105, 243, 0.15);
  border-radius: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  background: linear-gradient(135deg, rgba(231, 241, 255, 0.88), rgba(255, 255, 255, 0.78));
  text-align: left;
}

.notice-icon {
  position: relative;
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(18, 105, 243, 0.1);
}

.notice-icon i,
.notice-icon::before,
.notice-icon::after {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  background: var(--blue);
  content: "";
  transform: translate(-50%, -50%);
}

.notice-icon i { width: 9px; height: 9px; }
.notice-icon::before { width: 4px; height: 4px; margin-left: -11px; opacity: 0.5; }
.notice-icon::after { width: 4px; height: 4px; margin-left: 11px; opacity: 0.5; }

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

.release-notice small {
  margin-bottom: 6px;
  color: var(--blue-strong);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0.16em;
}

.release-notice strong {
  color: var(--navy);
  font-size: clamp(17px, 1.7vw, 22px);
  letter-spacing: -0.025em;
}

.site-footer {
  min-height: 88px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: #78859b;
  font-size: 13px;
}

@media (max-width: 960px) {
  .page-shell {
    padding-top: 92px;
  }

  .site-header {
    min-height: 92px;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    padding: 64px 0 96px;
    text-align: center;
  }

  .hero-copy {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .product-logo {
    width: min(92%, 560px);
  }

  .sound-field {
    order: -1;
    width: min(70vw, 420px);
  }

  .description {
    margin-top: 22px;
  }

  .feature-grid {
    max-width: 720px;
    margin: 0 auto;
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: auto;
  }

  .feature-number {
    margin-bottom: 24px;
  }
}

@media (max-width: 560px) {
  .page-shell {
    padding: 82px 20px 0;
  }

  .header-content {
    padding: 0 20px;
  }

  .site-header {
    min-height: 82px;
  }

  .site-header.is-scrolled {
    min-height: 62px;
  }

  .brand-lockup {
    gap: 0;
  }

  .brand {
    width: 116px;
  }

  .site-header.is-scrolled .brand {
    width: 78px;
  }

  .brand-divider {
    height: 22px;
  }

  .header-product-logo {
    width: 92px;
  }

  .site-header.is-scrolled .brand-lockup {
    gap: 8px;
  }

  .site-header.is-scrolled .header-product-logo {
    max-width: 92px;
  }

  .admin-link {
    min-height: 40px;
    padding: 0 11px;
    gap: 5px;
    border-radius: 12px;
    font-size: 12px;
  }

  .desktop-label {
    display: none;
  }

  .mobile-label {
    display: inline;
  }

  .hero {
    gap: 42px;
  }

  .sound-field {
    width: min(78vw, 330px);
  }

  .eyebrow {
    margin-bottom: 22px;
  }

  .product-type {
    max-width: 290px;
    line-height: 1.55;
  }

  h1 {
    font-size: clamp(38px, 11vw, 52px);
  }

  .headline-line {
    white-space: normal;
  }

  .scroll-cue {
    bottom: 20px;
    white-space: nowrap;
  }

  .development {
    min-height: 0;
    padding: 88px 0 104px;
  }

  .development-heading {
    margin-bottom: 42px;
  }

  .development h2 {
    font-size: clamp(34px, 10vw, 46px);
    word-break: keep-all;
  }

  .feature-grid {
    gap: 14px;
  }

  .feature-card {
    padding: 28px;
    border-radius: 20px;
  }

  .release-notice {
    min-height: 0;
    padding: 22px;
    justify-content: flex-start;
    gap: 15px;
  }

  .notice-icon {
    flex-basis: 36px;
    width: 36px;
    height: 36px;
  }

  .site-footer {
    padding: 24px 0;
    flex-direction: column;
    justify-content: center;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}