:root {
  --bg: #f2f5f8;
  --bg-radial-a: #d8efe9;
  --bg-radial-b: #ffdcb7;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --text: #0f1720;
  --muted: #5e6b79;
  --primary: #0e9f9c;
  --primary-strong: #0a7d7a;
  --line: rgba(15, 23, 32, 0.1);
  --shadow: 0 20px 55px rgba(10, 29, 44, 0.12);
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: "Noto Sans", "Noto Sans JP", "Noto Sans KR", "Noto Sans Thai", sans-serif;
  color: var(--text);
  background:
    radial-gradient(900px 500px at 10% -10%, var(--bg-radial-a), transparent 60%),
    radial-gradient(900px 500px at 100% 10%, var(--bg-radial-b), transparent 55%),
    var(--bg);
  line-height: 1.58;
}

a {
  color: inherit;
}

.container {
  width: min(1120px, calc(100% - 2.2rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(10px);
  background: rgba(242, 245, 248, 0.7);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.62rem;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0e9f9c, #ff8d47);
  box-shadow: 0 0 0 5px rgba(14, 159, 156, 0.15);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.language-select {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  color: var(--text);
  border-radius: 999px;
  padding: 0.55rem 1.8rem 0.55rem 0.85rem;
  font-size: 0.92rem;
}

.icon-link {
  border: 1px solid var(--line);
  background: var(--surface-strong);
  border-radius: 999px;
  padding: 0.52rem 0.9rem;
  text-decoration: none;
  font-size: 0.9rem;
}

main {
  padding: 2.1rem 0 3rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
  align-items: center;
  margin-top: 1.2rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.36rem 0.75rem;
  border-radius: 999px;
  background: rgba(14, 159, 156, 0.12);
  color: #0a6664;
  font-weight: 600;
  font-size: 0.83rem;
}

h1 {
  margin: 1rem 0 0.8rem;
  font-family: "Space Grotesk", "Noto Sans", sans-serif;
  font-size: clamp(2rem, 4.6vw, 3.3rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.subtitle {
  color: var(--muted);
  font-size: clamp(1rem, 1.55vw, 1.13rem);
  max-width: 58ch;
}

.cta-row {
  margin-top: 1.35rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.8rem 1.2rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #1db7b3);
  color: #fff;
  box-shadow: 0 14px 30px rgba(14, 159, 156, 0.27);
}

.btn-secondary {
  background: var(--surface-strong);
  border: 1px solid var(--line);
}

.hero-card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
}

.hero-card h2 {
  margin-top: 0;
  margin-bottom: 0.6rem;
  font-size: 1.1rem;
}

.hero-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.hero-list li + li {
  margin-top: 0.48rem;
}

.section {
  margin-top: 2.5rem;
}

.section h2 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.4rem, 3vw, 2rem);
  letter-spacing: -0.01em;
}

.section-intro {
  margin-top: 0.55rem;
  color: var(--muted);
}

.grid {
  margin-top: 1.25rem;
  display: grid;
  gap: 0.95rem;
}

.features {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 16px;
  padding: 1rem;
}

.card h3 {
  margin: 0;
  font-size: 1.02rem;
}

.card p {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.steps {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.step-number {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--primary-strong);
  background: rgba(14, 159, 156, 0.14);
  margin-bottom: 0.65rem;
}

.faq {
  display: grid;
  gap: 0.7rem;
  margin-top: 1.2rem;
}

.faq-item {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 14px;
  padding: 0.95rem 1rem;
}

.faq-item h3 {
  margin: 0;
  font-size: 1rem;
}

.faq-item p {
  margin: 0.42rem 0 0;
  color: var(--muted);
}

.callout {
  margin-top: 1.4rem;
  background: linear-gradient(135deg, #0d4a5f, #0e8e8b);
  color: #eafcfb;
  border-radius: 18px;
  padding: 1.2rem;
}

.callout a {
  color: #fff;
  font-weight: 700;
}

.site-footer {
  margin-top: 2.6rem;
  border-top: 1px solid var(--line);
}

.footer-inner {
  padding: 1.1rem 0 1.8rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .features {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 720px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-actions {
    width: 100%;
  }

  .language-select {
    width: 100%;
  }

  .icon-link {
    display: none;
  }

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

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}