:root {
  --ink: #092a3a;
  --muted: #59717c;
  --surface: #f4fafb;
  --surface-strong: #e6f3f5;
  --line: #d3e7eb;
  --ocean: #0b4f6c;
  --ocean-deep: #073448;
  --aqua: #2bb8bd;
  --coral: #f27961;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(7, 52, 72, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Segoe UI", sans-serif;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

.shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: relative;
  z-index: 2;
  background: rgba(244, 250, 251, 0.88);
  border-bottom: 1px solid rgba(211, 231, 235, 0.75);
  backdrop-filter: blur(16px);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ocean-deep);
  font-weight: 800;
  letter-spacing: -0.05em;
  text-decoration: none;
}

.brand-mark {
  display: block;
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  border-radius: 11px;
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(7, 52, 72, 0.16);
}

.site-nav,
.footer-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

.site-nav a,
.footer-links a {
  text-decoration: none;
}

.site-nav a:hover,
.site-nav .nav-current,
.footer-links a:hover {
  color: var(--ocean);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 104px 0 116px;
  background:
    radial-gradient(circle at 83% 18%, rgba(43, 184, 189, 0.25), transparent 26%),
    linear-gradient(135deg, #e8f7f7 0%, #f4fafb 54%, #e8f1f7 100%);
}

.hero::after {
  position: absolute;
  right: -10%;
  bottom: -190px;
  width: 70%;
  height: 340px;
  content: "";
  background: rgba(255, 255, 255, 0.46);
  border-radius: 50% 50% 0 0;
  transform: rotate(-6deg);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  align-items: center;
  gap: 90px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--aqua);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

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

h1,
h2,
h3 {
  letter-spacing: -0.065em;
  line-height: 1.18;
}

.hero h1 {
  max-width: 650px;
  margin-bottom: 24px;
  color: var(--ocean-deep);
  font-size: clamp(42px, 6vw, 74px);
  font-weight: 800;
}

.hero h1 span {
  color: var(--coral);
}

.hero-description {
  max-width: 520px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 17px;
}

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

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 21px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

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

.button-primary {
  color: var(--white);
  background: var(--ocean);
  box-shadow: 0 10px 20px rgba(11, 79, 108, 0.2);
}

.button-secondary {
  color: var(--ocean);
  background: rgba(255, 255, 255, 0.6);
  border-color: var(--line);
}

.hero-card {
  position: relative;
  min-height: 410px;
  padding: 28px;
  overflow: hidden;
  color: var(--white);
  background: linear-gradient(145deg, #0b4f6c 0%, #0a3b54 56%, #062c40 100%);
  border-radius: 30px;
  box-shadow: var(--shadow);
}

.hero-card-glow {
  position: absolute;
  top: -25%;
  right: -10%;
  width: 260px;
  height: 260px;
  background: rgba(43, 184, 189, 0.32);
  border-radius: 50%;
  filter: blur(4px);
}

.hero-card-topline,
.hero-card-footer {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hero-card-topline {
  color: rgba(255, 255, 255, 0.86);
  font-size: 14px;
}

.status-dot {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #a9eeee;
  font-size: 12px;
}

.status-dot::before {
  width: 6px;
  height: 6px;
  content: "";
  background: #78e4d8;
  border-radius: 50%;
}

.tide-preview {
  position: relative;
  height: 245px;
  margin: 26px -12px 20px;
}

.tide-preview::before,
.tide-preview::after {
  position: absolute;
  right: 0;
  left: 0;
  height: 1px;
  content: "";
  background: rgba(255, 255, 255, 0.14);
}

.tide-preview::before {
  top: 36%;
}

.tide-preview::after {
  top: 73%;
}

.tide-line {
  position: absolute;
  inset: 0;
  clip-path: polygon(0 67%, 8% 57%, 16% 62%, 24% 33%, 32% 24%, 40% 38%, 48% 61%, 56% 66%, 64% 53%, 72% 20%, 80% 17%, 88% 34%, 96% 60%, 100% 51%, 100% 100%, 0 100%);
}

.tide-line-back {
  background: rgba(43, 184, 189, 0.2);
  transform: translateY(6px) scaleX(1.02);
}

.tide-line-front {
  background: linear-gradient(180deg, rgba(120, 228, 216, 0.58), rgba(120, 228, 216, 0.04));
  border-top: 3px solid #91f0e6;
}

.tide-point {
  position: absolute;
  top: 30%;
  left: 73%;
  width: 13px;
  height: 13px;
  background: var(--coral);
  border: 3px solid rgba(255, 255, 255, 0.72);
  border-radius: 50%;
  box-shadow: 0 0 0 8px rgba(242, 121, 97, 0.16);
}

.hero-card-footer {
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.metric-label {
  display: block;
  margin-bottom: 3px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
}

.metric-arrow {
  color: #91f0e6;
  font-size: 34px;
  line-height: 1;
}

.section {
  padding: 112px 0;
}

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

.section-heading h2 {
  max-width: 640px;
  margin-bottom: 0;
  color: var(--ocean-deep);
  font-size: clamp(34px, 5vw, 56px);
}

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

.feature-card {
  min-height: 260px;
  padding: 30px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 22px;
}

.feature-card-highlight {
  color: var(--white);
  background: var(--ocean);
  border-color: var(--ocean);
}

.feature-icon {
  display: inline-grid;
  width: 44px;
  height: 44px;
  margin-bottom: 28px;
  place-items: center;
  color: var(--ocean);
  background: var(--surface-strong);
  border-radius: 14px;
  font-size: 22px;
}

.feature-card-highlight .feature-icon {
  color: var(--white);
  background: rgba(255, 255, 255, 0.15);
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 25px;
}

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

.feature-card-highlight p {
  color: rgba(255, 255, 255, 0.76);
}

.section-quiet {
  padding-top: 0;
}

.quote-card {
  position: relative;
  padding: 60px clamp(26px, 7vw, 90px);
  overflow: hidden;
  background: var(--surface-strong);
  border-radius: 30px;
}

.quote-card::after {
  position: absolute;
  right: -80px;
  bottom: -130px;
  width: 260px;
  height: 260px;
  content: "";
  border: 40px solid rgba(43, 184, 189, 0.16);
  border-radius: 50%;
}

.quote-mark {
  position: relative;
  z-index: 1;
  margin-bottom: 8px;
  color: var(--coral);
  font-family: Georgia, serif;
  font-size: 70px;
  line-height: 0.65;
}

.quote {
  position: relative;
  z-index: 1;
  margin-bottom: 22px;
  color: var(--ocean-deep);
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 1.3;
}

.quote-caption {
  position: relative;
  z-index: 1;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  padding: 42px 0 24px;
  color: rgba(255, 255, 255, 0.76);
  background: var(--ocean-deep);
}

.footer-brand {
  color: var(--white);
}

.footer-links {
  color: rgba(255, 255, 255, 0.72);
}

.footer-links a:hover {
  color: var(--white);
}

.footer-note {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
}

.footer-legal {
  margin-top: 30px;
  padding-top: 18px;
  color: rgba(255, 255, 255, 0.38);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12px;
}

.legal-main {
  padding: 84px 0 112px;
}

.legal-layout {
  display: grid;
  grid-template-columns: minmax(210px, 0.34fr) minmax(0, 0.66fr);
  gap: 80px;
}

.legal-heading {
  position: sticky;
  top: 32px;
  align-self: start;
}

.legal-heading h1 {
  margin-bottom: 16px;
  color: var(--ocean-deep);
  font-size: clamp(36px, 5vw, 60px);
}

.legal-heading p:last-child {
  color: var(--muted);
  font-size: 14px;
}

.legal-content {
  min-width: 0;
  padding: 40px clamp(24px, 5vw, 58px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 26px;
}

.legal-content > p:first-child {
  color: var(--muted);
  font-size: 17px;
}

.legal-content h2 {
  margin: 42px 0 14px;
  color: var(--ocean-deep);
  font-size: 24px;
}

.legal-content h3 {
  margin: 26px 0 8px;
  color: var(--ocean);
  font-size: 18px;
}

.legal-content p,
.legal-content li {
  color: var(--muted);
  font-size: 15px;
}

.legal-content a {
  color: var(--ocean);
  font-weight: 700;
}

.notice-card,
.contact-card {
  margin-top: 34px;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.notice-card strong {
  display: block;
  margin-bottom: 6px;
  color: var(--ocean-deep);
}

.notice-card p {
  margin-bottom: 0;
  font-size: 14px;
}

.contact-card {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-top: 0;
}

.contact-card .feature-icon {
  flex: 0 0 auto;
  margin-bottom: 0;
}

.contact-card h2 {
  margin-top: 0;
}

.contact-card p {
  margin-bottom: 8px;
}

.placeholder-label {
  color: var(--coral) !important;
  font-weight: 700;
}

details {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

summary {
  color: var(--ocean-deep);
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
}

details p {
  margin: 14px 0 0;
}

.support-list {
  padding-left: 20px;
}

@media (max-width: 800px) {
  .hero {
    padding: 76px 0 84px;
  }

  .hero-grid,
  .legal-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-card {
    min-height: 360px;
  }

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

  .legal-heading {
    position: static;
  }
}

@media (max-width: 560px) {
  .shell {
    width: min(100% - 28px, 1120px);
  }

  .header-inner {
    min-height: 68px;
  }

  .site-nav {
    gap: 12px;
    font-size: 12px;
  }

  .site-nav a:first-child {
    display: none;
  }

  .hero h1 {
    font-size: 44px;
  }

  .hero-description {
    font-size: 15px;
  }

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

  .button {
    width: 100%;
  }

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

  .legal-main {
    padding: 58px 0 80px;
  }

  .legal-content {
    padding: 28px 20px;
  }
}