:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --card: #ffffff;
  --primary: #4f8f4c;
  --primary-dark: #356b35;
  --text: #1f2a1f;
  --muted: #5f6b63;
  --border: #e6ece6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  background: linear-gradient(135deg, #f7fbf6 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.7;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #7ab96d 100%);
  color: white;
  padding: 42px 32px;
  border-radius: 24px;
  box-shadow: 0 10px 30px rgba(79, 143, 76, 0.18);
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.9;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  line-height: 1.25;
}

.sub {
  margin: 0;
  font-size: 1.05rem;
  opacity: 0.95;
  max-width: 720px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.button {
  display: inline-block;
  padding: 12px 18px;
  background: #ffffff;
  color: var(--primary-dark);
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.16);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: none;
}

.content {
  display: block;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px 26px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.04);
  margin-bottom: 24px;
}

.card h2 {
  margin: 0 0 10px;
  font-size: 1.2rem;
  color: var(--primary-dark);
}

.card p {
  margin: 0 0 12px;
  color: var(--muted);
}

.app-gallery {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
}

.gallery-viewport {
  flex: 1;
  overflow: hidden;
}

.gallery-track {
  display: flex;
  gap: 14px;
  width: max-content;
  transition: transform 0.3s ease;
  will-change: transform;
}

.gallery-item {
  flex: 0 0 clamp(200px, 28vw, 240px);
  background: #f8fcf8;
  border: 1px solid #ebf3ea;
  border-radius: 16px;
  padding: 8px;
  overflow: hidden;
}

.gallery-item img {
  display: block;
  width: 100%;
  object-fit: cover;
  border-radius: 10px;
}

.gallery-nav {
  border: none;
  background: var(--primary);
  color: #ffffff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(79, 143, 76, 0.2);
}

.gallery-nav:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.feature-item {
  background: #f8fcf8;
  border: 1px solid #ebf3ea;
  border-radius: 14px;
  padding: 16px;
}

.feature-item h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  color: var(--primary-dark);
}

.feature-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
  display: grid;
  gap: 10px;
}

.check-list li {
  padding: 12px 14px;
  border-radius: 12px;
  background: #f8fcf8;
  border: 1px solid #ebf3ea;
  color: var(--text);
  font-weight: 600;
}

.check-list li::before {
  content: '✓';
  color: var(--primary);
  margin-right: 8px;
}

.mail-link,
.text-link {
  display: inline-block;
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.mail-link:hover,
.text-link:hover {
  text-decoration: underline;
}

.content ul {
  padding-left: 18px;
  margin: 8px 0 12px;
  color: var(--muted);
}

.content li + li {
  margin-top: 6px;
}

.content h3 {
  margin: 12px 0 8px;
  color: var(--primary-dark);
}

.page-footer {
  display: flex;
  justify-content: center;
  gap: 20px;
  padding: 20px 10px 0;
  flex-wrap: wrap;
}

.footer-link {
  color: var(--primary-dark);
  font-weight: 600;
  text-decoration: none;
}

.footer-link:hover {
  text-decoration: underline;
}

@media (max-width: 700px) {
  .hero {
    padding: 28px 20px;
  }

  .gallery-item {
    flex-basis: min(72vw, 220px);
  }

  .gallery-nav {
    width: 36px;
    height: 36px;
  }

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