:root {
  --bg: #f2f4f6;
  --surface: #ffffff;
  --surface-soft: #f9fafb;
  --surface-blue: #e8f3ff;
  --text: #191f28;
  --muted: #6b7684;
  --line: #e5e8eb;
  --blue: #3182f6;
  --blue-strong: #1b64da;
  --blue-soft: rgba(49, 130, 246, 0.1);
  --radius-xl: 40px;
  --radius-lg: 28px;
  --radius-md: 20px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Pretendard", "SUIT", "Avenir Next", "Apple SD Gothic Neo", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(49, 130, 246, 0.08), transparent 28%),
    linear-gradient(180deg, #f9fbff 0%, var(--bg) 32%, #eef2f6 100%);
}

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

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

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

.page {
  padding: 16px 0 0;
}

.content {
  width: min(1160px, calc(100% - 28px));
  margin: 0 auto;
}

.hero-band {
  background: linear-gradient(180deg, #f9fbff 0%, #f1f5f9 100%);
}

.feature-band {
  background: linear-gradient(180deg, #eef6ff 0%, #f7fbff 100%);
}

.apps-band {
  background: #ffffff;
}

.contact-band {
  background: #f2f4f6;
}

.detail-band {
  background: linear-gradient(180deg, #eef6ff 0%, #ffffff 100%);
}

.subtle-band {
  background: linear-gradient(180deg, #ffffff 0%, #f7fafc 100%);
}

.topbar {
  position: sticky;
  top: 14px;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px);
}

.brand {
  display: grid;
  gap: 3px;
}

.brand-mark {
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-copy {
  color: var(--muted);
  font-size: 0.92rem;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-link {
  color: var(--muted);
  font-weight: 600;
}

.nav-link.active {
  color: var(--text);
}

.lang-switch {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: var(--surface-soft);
}

.lang-link {
  border-radius: 999px;
  padding: 10px 16px;
  color: var(--muted);
  font-weight: 700;
}

.lang-link.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.08);
}

.section {
  padding: 132px 0;
}

.hero {
  display: block;
  padding: 132px 0 120px;
}

.hero-copy {
  display: grid;
  gap: 20px;
  max-width: 920px;
  margin: 0 auto;
  justify-items: center;
}

.hero-copy h1 {
  text-align: center;
  font-size: clamp(3rem, 7vw, 4.9rem);
  line-height: 1.05;
  letter-spacing: -0.06em;
}

.hero-copy p {
  width: 100%;
  max-width: 840px;
  text-align: left;
  color: var(--muted);
  line-height: 1.72;
}

.feature-layout,
.detail-layout {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
}

.feature-visual,
.detail-visual {
  display: flex;
  justify-content: flex-start;
}

.feature-copy,
.detail-copy {
  display: grid;
  gap: 18px;
  max-width: 700px;
}

.feature-label,
.detail-label,
.app-category {
  display: inline-flex;
  width: fit-content;
  padding: 9px 12px;
  border-radius: 999px;
  background: rgba(49, 130, 246, 0.12);
  color: var(--blue-strong);
  font-size: 0.84rem;
  font-weight: 700;
}

.feature-title,
.detail-title,
.section-heading,
.contact-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -0.06em;
}

.feature-subtitle,
.detail-subtitle,
.feature-text,
.detail-text,
.section-copy,
.contact-copy,
.value-copy,
.detail-list li,
.detail-section p {
  color: var(--muted);
  line-height: 1.78;
}

.feature-actions,
.detail-actions,
.contact-links,
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.appstore-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 64px;
  padding: 12px 18px;
  border-radius: 18px;
  background: #0f1115;
  color: #ffffff;
  box-shadow: 0 18px 30px rgba(15, 23, 42, 0.16);
}

.appstore-badge:hover {
  transform: translateY(-1px);
  background: #090b0e;
}

.appstore-badge.mini {
  min-height: 42px;
  padding: 0 14px;
  gap: 8px;
  border-radius: 14px;
  background: #eef4fb;
  color: var(--blue-strong);
  box-shadow: none;
}

.appstore-badge.mini:hover {
  background: #e5eef9;
}

.appstore-icon {
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
}

.appstore-badge.mini .appstore-icon {
  width: 20px;
  height: 20px;
}

.appstore-copy {
  display: block;
  text-align: left;
}

.appstore-title {
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.appstore-badge.mini .appstore-title {
  font-size: 0.92rem;
  color: var(--blue-strong);
}

.secondary-link {
  display: inline-flex;
  align-items: center;
  min-height: 52px;
  padding: 0 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--text);
  border: 1px solid rgba(229, 232, 235, 0.9);
  font-weight: 600;
}

.feature-device,
.detail-device {
  width: min(100%, 320px);
  aspect-ratio: 0.62;
  padding: 16px 14px 0;
  border-radius: 42px 42px 0 0;
  background: #171b22;
  box-shadow:
    -26px 34px 56px rgba(15, 23, 42, 0.16),
    -10px 12px 22px rgba(15, 23, 42, 0.08);
  position: relative;
}

.feature-device::before,
.detail-device::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 42%;
  height: 20px;
  border-radius: 999px;
  background: #0c0f14;
}

.feature-device::after,
.detail-device::after {
  content: "";
  position: absolute;
  left: -32px;
  right: 42px;
  bottom: 34px;
  height: 72%;
  border-radius: 46px;
  background: linear-gradient(180deg, rgba(60, 83, 120, 0.12), rgba(15, 23, 42, 0.03));
  filter: blur(28px);
  z-index: -1;
}

.feature-device-screen,
.detail-device-screen {
  height: 100%;
  border-radius: 34px 34px 0 0;
  background: linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
  padding: 34px 22px 22px;
  display: grid;
  align-content: start;
  gap: 18px;
  overflow: hidden;
}

.feature-icon,
.detail-icon {
  width: 76px;
  height: 76px;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.14);
}

.skeleton-stack,
.feature-pill-row,
.values-grid,
.detail-grid,
.detail-list {
  display: grid;
}

.skeleton-stack {
  gap: 12px;
}

.feature-skeleton-line {
  height: 16px;
  border-radius: 999px;
  background: #edf1f7;
}

.feature-skeleton-line.long {
  width: 82%;
}

.feature-skeleton-line.medium {
  width: 96%;
}

.feature-skeleton-line.short {
  width: 68%;
}

.feature-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.feature-pill {
  width: 92px;
  height: 38px;
  border-radius: 999px;
  background: #eaf2fe;
}

.values-grid,
.detail-grid {
  margin-top: 88px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px;
}

.value-card,
.detail-card {
  padding: 0;
}

.value-card strong,
.detail-card h3 {
  display: block;
  margin-bottom: 10px;
  font-size: 1.08rem;
  letter-spacing: -0.02em;
}

.app-grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 28px;
}

.app-card {
  display: grid;
  gap: 16px;
  padding: 24px 18px 28px;
  margin: 0 -18px;
  border-radius: 28px;
  border-bottom: 1px solid rgba(229, 232, 235, 0.9);
  transition: background 180ms ease, transform 180ms ease;
}

.app-card-link {
  display: block;
  cursor: pointer;
}

.app-card-link:hover,
.app-card-link:focus-visible {
  background: rgba(232, 243, 255, 0.82);
  transform: translateY(-2px);
}

.app-card-link:hover .app-title,
.app-card-link:focus-visible .app-title {
  color: var(--blue-strong);
}

.app-card-header {
  display: flex;
  gap: 16px;
}

.app-card-icon {
  width: 72px;
  height: 72px;
  border-radius: 22px;
  overflow: hidden;
  flex: 0 0 auto;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

.app-title {
  margin-top: 8px;
  font-size: 1.32rem;
  letter-spacing: -0.04em;
}

.app-subtitle,
.app-card-copy {
  color: var(--muted);
}

.app-subtitle {
  margin-top: 4px;
  font-size: 0.95rem;
}

.app-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.card-actions {
  justify-content: flex-end;
}

.chip {
  padding: 7px 10px;
  border-radius: 999px;
  background: #f2f4f6;
  color: var(--muted);
  font-size: 0.8rem;
}

.detail-link {
  color: var(--blue-strong);
  font-weight: 700;
}

.contact-layout {
  display: grid;
  gap: 18px;
  max-width: 760px;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  min-height: 52px;
  padding: 0 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--text);
  border: 1px solid rgba(229, 232, 235, 0.9);
  font-weight: 600;
}

.detail-list {
  gap: 12px;
  padding-left: 20px;
}

.detail-list strong {
  color: var(--text);
}

.detail-section {
  margin-top: 88px;
  max-width: 760px;
}

.detail-section h2 {
  margin-bottom: 18px;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  letter-spacing: -0.04em;
}

@media (max-width: 980px) {
  .feature-layout,
  .detail-layout,
  .values-grid,
  .detail-grid,
  .app-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .content {
    width: min(100% - 18px, 1160px);
  }

  .topbar {
    align-items: start;
    flex-direction: column;
  }

  .topbar-actions {
    width: 100%;
    justify-content: space-between;
  }

  .hero {
    padding: 96px 0 88px;
  }

  .section {
    padding: 96px 0;
  }
}