:root {
  --bg: #f8fafc;
  --text: #1e293b;
  --muted: #64748b;
  --primary: #0f172a;
  --card: #ffffff;
  --border: #e2e8f0;
  --soft: #eef2f7;
  --radius: 20px;
  --radius-lg: 28px;
  --shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 12px 40px rgba(15, 23, 42, 0.1);
  --transition: 0.25s ease;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'DM Sans', system-ui, sans-serif;
  color: var(--text);
  background: var(--card);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

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

.container {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 20px 0;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  color: inherit;
}

.brand-mark:hover .brand-title {
  color: var(--primary);
}

.brand-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-copy {
  min-width: 0;
}

.brand-title {
  margin: 0;
  font-family: 'Sora', sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.brand-tagline {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 10px;
  transition: color var(--transition), background var(--transition);
}

nav a:hover {
  color: var(--primary);
  background: var(--soft);
}

nav a[aria-current="page"] {
  color: var(--primary);
  background: var(--soft);
}

.hero {
  background: linear-gradient(165deg, #f1f5f9 0%, #ffffff 45%, #f8fafc 100%);
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 48px;
  align-items: center;
  padding: 80px 0;
}

.tag {
  display: inline-block;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--muted);
  background: #fff;
  box-shadow: var(--shadow);
}

.hero h2 {
  font-family: 'Sora', sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 20px 0 20px;
  color: var(--primary);
}

.hero p {
  font-size: 1.1rem;
  color: var(--muted);
  margin: 0;
  max-width: 560px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.btn {
  display: inline-block;
  padding: 16px 24px;
  border-radius: 14px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow var(--transition), opacity var(--transition);
}

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

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.25);
}

.btn-primary:hover {
  opacity: 0.95;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.3);
}

.btn-secondary {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
}

.btn-secondary:hover { background: var(--soft); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-hover);
  border-color: #cbd5e1;
}

.card h3, .card h4 {
  margin-top: 0;
  font-family: 'Sora', sans-serif;
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

section {
  padding: 80px 0;
}

.section-soft {
  background: var(--bg);
}

.page-intro {
  padding: 48px 0 24px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(165deg, #f1f5f9 0%, #ffffff 100%);
}

.page-intro h1 {
  font-family: 'Sora', sans-serif;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 12px;
  color: var(--primary);
}

.section-title {
  font-family: 'Sora', sans-serif;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 12px;
  color: var(--primary);
}

.section-text {
  color: var(--muted);
  max-width: 720px;
  margin: 0;
}

.section-text a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.section-text a:hover {
  opacity: 0.85;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

ul.clean {
  padding-left: 20px;
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.highlight {
  background: linear-gradient(90deg, rgba(15, 23, 42, 0.04) 0%, transparent 100%);
  border-left: 4px solid var(--primary);
  padding: 18px 20px;
  border-radius: 12px;
  color: var(--text);
  margin-top: 20px;
  font-size: 0.95rem;
}

.notice-box {
  background: var(--soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-top: 24px;
}

.notice-box p {
  margin: 0;
  color: var(--text);
  max-width: none;
}

.notice-box p + p {
  margin-top: 12px;
}

.footer-link-instagram {
  color: #cbd5e1;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-link-instagram:hover {
  color: #fff;
}

footer {
  background: var(--primary);
  color: #fff;
  padding: 64px 0;
  margin-top: auto;
}

footer h2 {
  font-family: 'Sora', sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 16px;
}

footer p, footer li {
  color: #cbd5e1;
  margin: 0 0 8px;
}

@media (max-width: 900px) {
  .hero-grid,
  .grid-2,
  .grid-3,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-grid { padding: 56px 0; }

  .hero h2 {
    font-size: 2rem;
  }

  nav {
    gap: 6px;
  }
}

@media (max-width: 500px) {
  section { padding: 56px 0; }

  .brand-logo {
    width: 40px;
    height: 40px;
  }

  .brand-title {
    font-size: 1.05rem;
  }
}