@font-face {
  font-family: "Pretendard";
  src: url("./assets/fonts/Pretendard-Regular.ttf") format("truetype");
  font-weight: 400;
}

@font-face {
  font-family: "Pretendard";
  src: url("./assets/fonts/Pretendard-Medium.ttf") format("truetype");
  font-weight: 500;
}

@font-face {
  font-family: "Pretendard";
  src: url("./assets/fonts/Pretendard-SemiBold.ttf") format("truetype");
  font-weight: 700;
}

:root {
  --sky-900: #0e3f77;
  --sky-700: #2d75c7;
  --sky-500: #66b7f1;
  --sky-200: #dff3ff;
  --ink-900: #102132;
  --ink-700: #4b6074;
  --white: #ffffff;
  --line: rgba(16, 33, 50, 0.09);
  --surface: rgba(255, 255, 255, 0.78);
  --shadow: 0 24px 60px rgba(44, 90, 144, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Pretendard", sans-serif;
  color: var(--ink-900);
  background:
    linear-gradient(180deg, #cde9ff 0%, #eef8ff 16%, #ffffff 34%, #f6fbff 100%);
  word-break: keep-all;
}

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

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

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 32px;
  color: var(--white);
  background: linear-gradient(180deg, rgba(28, 97, 167, 0.36), rgba(28, 97, 167, 0));
}

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

.brand-mark {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ffffff, rgba(255, 255, 255, 0.5));
}

.brand-copy strong,
.brand-copy span {
  display: block;
}

.brand-copy strong {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.06em;
}

.brand-copy span {
  margin-top: 2px;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.88;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.nav-links a {
  opacity: 0.96;
}

.nav-links a:hover,
.lang-button:hover {
  opacity: 1;
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(12px);
}

.lang-button {
  min-width: 48px;
  height: 34px;
  border: 0;
  border-radius: 999px;
  color: var(--white);
  background: transparent;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}

.lang-button.active {
  color: var(--sky-900);
  background: var(--white);
}

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  align-items: end;
  gap: 30px;
  padding: 120px 32px 48px;
  overflow: hidden;
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-media {
  background-image: url("./assets/images/splash_main.png");
  background-size: cover;
  background-position: center;
  transform: scale(1.06);
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(16, 70, 132, 0.54) 0%, rgba(16, 70, 132, 0.2) 42%, rgba(16, 70, 132, 0.08) 100%),
    linear-gradient(180deg, rgba(23, 92, 162, 0.16) 0%, rgba(23, 92, 162, 0.1) 100%);
}

.hero-content,
.hero-panel {
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 760px;
  color: var(--white);
}

.hero-kicker,
.eyebrow {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 18px 0 0;
  font-size: clamp(3.4rem, 7vw, 6rem);
  font-weight: 700;
  line-height: 0.94;
  letter-spacing: -0.06em;
}

.hero-description {
  max-width: 640px;
  margin: 24px 0 0;
  font-size: 1.12rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.96);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.primary-button,
.secondary-button,
.inline-link,
.trust-card a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 700;
  transition: transform 180ms ease, background 180ms ease;
}

.primary-button {
  color: var(--sky-900);
  background: var(--white);
  box-shadow: 0 14px 34px rgba(9, 56, 109, 0.22);
}

.secondary-button,
.trust-card a {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.08);
}

.primary-button:hover,
.secondary-button:hover,
.inline-link:hover,
.trust-card a:hover {
  transform: translateY(-2px);
}

.hero-panel {
  display: grid;
  gap: 14px;
}

.hero-panel div {
  padding: 18px 18px 20px;
  color: var(--white);
  background: rgba(14, 63, 119, 0.32);
  border: 1px solid rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(12px);
}

.hero-panel span {
  display: block;
  font-size: 0.76rem;
  opacity: 0.86;
}

.hero-panel strong {
  display: block;
  margin-top: 8px;
  font-size: 1.26rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.section {
  padding: 110px 32px;
}

.section-heading {
  max-width: 860px;
  margin-bottom: 34px;
}

.section-heading.split {
  max-width: none;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.section-heading h2 {
  margin: 16px 0 0;
  font-size: clamp(2rem, 4vw, 3.6rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.05em;
}

.eyebrow {
  color: var(--sky-700);
}

.intro-layout,
.showcase-grid,
.trust-grid {
  display: grid;
  gap: 18px;
}

.intro-layout {
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
}

.intro-card,
.feature-card,
.showcase-card,
.trust-card {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.intro-card {
  min-height: 220px;
  padding: 28px;
}

.intro-card-large {
  grid-column: span 2;
  background:
    linear-gradient(135deg, rgba(102, 183, 241, 0.18), rgba(255, 255, 255, 0.84));
}

.intro-card p {
  margin: 0;
  color: var(--ink-700);
  font-size: 1rem;
  line-height: 1.9;
}

.intro-card span,
.showcase-card span,
.trust-card span {
  color: var(--sky-700);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.intro-card strong,
.showcase-card h3,
.trust-card h3,
.feature-card h3 {
  display: block;
  margin-top: 14px;
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.04em;
}

.intro-card:not(.intro-card-large) p,
.showcase-card p,
.trust-card p,
.feature-card p {
  margin-top: 12px;
  color: var(--ink-700);
  font-size: 0.98rem;
  line-height: 1.8;
}

.section-flagship {
  background:
    linear-gradient(180deg, rgba(194, 232, 255, 0.48), rgba(255, 255, 255, 0.86));
}

.inline-link {
  color: var(--sky-900);
  background: rgba(102, 183, 241, 0.16);
}

.flagship-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(0, 1.05fr);
  gap: 22px;
  align-items: stretch;
}

.flagship-visual {
  margin: 0;
  overflow: hidden;
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.flagship-visual img {
  width: 100%;
  height: 100%;
  min-height: 620px;
  object-fit: cover;
}

.flagship-copy {
  display: grid;
  gap: 18px;
}

.feature-card {
  min-height: 188px;
  padding: 28px;
}

.feature-card span {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-weight: 700;
  color: var(--white);
}

.accent-blue span {
  background: linear-gradient(135deg, #326dff, #4598ff);
}

.accent-cyan span {
  background: linear-gradient(135deg, #02a3d8, #4ed8ff);
}

.accent-sky span {
  background: linear-gradient(135deg, #4b7dff, #77c8ff);
}

.showcase-grid {
  grid-template-columns: 1.2fr 1fr 1fr;
}

.showcase-card {
  min-height: 230px;
  padding: 28px;
}

.showcase-card-wide {
  background:
    linear-gradient(135deg, rgba(73, 157, 232, 0.14), rgba(255, 255, 255, 0.9));
}

.trust-grid {
  grid-template-columns: repeat(2, 1fr);
}

.trust-card {
  min-height: 240px;
  padding: 28px;
}

.trust-card a {
  margin-top: 24px;
  color: var(--sky-900);
  border-color: rgba(45, 117, 199, 0.22);
  background: rgba(102, 183, 241, 0.14);
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(240px, 0.9fr) minmax(0, 1.1fr);
  gap: 28px;
  padding: 42px 32px 52px;
  color: var(--white);
  background: linear-gradient(135deg, #124b8b, #0d3a6f);
}

.footer-brand strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.05em;
}

.footer-brand p {
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.7;
}

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

.footer-item {
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
}

.footer-item span {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.84;
}

.footer-item strong,
.footer-item a {
  display: block;
  margin-top: 10px;
  color: var(--white);
  font-size: 1.04rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  word-break: break-all;
}

@media (max-width: 1180px) {
  .hero,
  .flagship-layout,
  .intro-layout,
  .showcase-grid,
  .trust-grid {
    grid-template-columns: 1fr;
  }

  .intro-card-large {
    grid-column: auto;
  }

  .hero {
    min-height: auto;
  }

  .hero-panel {
    grid-template-columns: repeat(3, 1fr);
  }

  .flagship-visual img {
    min-height: 420px;
  }

  .site-footer,
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .site-header {
    padding: 18px 20px;
  }

  .nav-links {
    display: none;
  }

  .brand-copy strong {
    font-size: 1.45rem;
  }

  .hero,
  .section {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero {
    padding-top: 110px;
    padding-bottom: 32px;
  }

  .hero h1 {
    font-size: clamp(2.7rem, 10vw, 4.4rem);
  }

  .hero-description {
    font-size: 1rem;
  }

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

  .section-heading.split {
    display: block;
  }

  .site-footer {
    padding-left: 20px;
    padding-right: 20px;
  }
}

@media (max-width: 520px) {
  .language-switcher {
    padding: 3px;
  }

  .lang-button {
    min-width: 44px;
    height: 32px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .primary-button,
  .secondary-button,
  .inline-link,
  .trust-card a {
    width: 100%;
  }

  .intro-card,
  .feature-card,
  .showcase-card,
  .trust-card {
    padding: 24px;
  }
}