:root {
  /* Simple light gray + yellow theme */
  --primary-color: #FFD52B; /* accent yellow */
  --primary-dark: #e6c022;
  --secondary-color: #f0f0f0; /* light gray */
  --accent-color: #FFD52B;

  --text-primary: #333333;
  --text-secondary: #555555;
  --text-light: #777777;

  --bg-primary: #f7f7f7;
  --bg-secondary: #f0f0f0;
  --bg-accent: #ffffff;

  --border-light: #e8e8e8;
  --border-primary: #dddddd;

  --shadow-soft: 0 8px 24px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 28px rgba(0,0,0,0.08);

  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  padding: 20px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', Meiryo, sans-serif;
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.fade-in { opacity: 0; transform: translateY(24px); transition: opacity .5s ease, transform .5s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

.container {
  max-width: 920px;
  margin: 0 auto;
  background: var(--bg-accent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: box-shadow var(--transition-medium);
}
.container:hover { box-shadow: var(--shadow-hover); }

.header {
  background: linear-gradient(135deg, var(--secondary-color) 0%, #ffffff 65%);
  padding: 56px 40px;
  text-align: center;
  position: relative;
}
.header::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(255,213,43,0.25), transparent 50%);
  pointer-events: none;
}
.app-title, .policy-title {
  margin: 0 0 12px;
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: clamp(1.8rem, 4.5vw, 2.6rem);
  color: var(--text-primary);
}
.app-subtitle {
  margin: 0;
  color: var(--text-secondary);
  font-size: clamp(0.95rem, 2.8vw, 1.1rem);
}

.content { padding: 44px; background: var(--bg-accent); }

.section { margin-bottom: 44px; }
.section-title {
  margin: 0 0 18px;
  font-size: clamp(1.2rem, 3.5vw, 1.6rem);
  font-weight: 600;
  color: var(--text-primary);
  position: relative;
  padding-bottom: 10px;
}
.section-title::after {
  content: '';
  position: absolute; left: 0; bottom: 0;
  width: 72px; height: 4px;
  background: var(--accent-color);
  border-radius: 2px;
}

.app-info, .company-info, .contact-info {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
}
.app-info { background: #fff; }
.description-content p { margin: 0 0 14px; color: var(--text-secondary); }

.features-list { list-style: none; padding: 0; margin: 18px 0 0; }
.features-list li {
  background: #fff;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  padding: 14px 16px 14px 44px;
  margin: 10px 0;
  color: var(--text-secondary);
  position: relative;
}
.features-list li::before {
  content: '✓';
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  width: 20px; height: 20px; line-height: 20px; text-align: center;
  border-radius: 10px; font-weight: 700; color: #000;
  background: var(--accent-color);
}

.date-info { margin-top: 24px; color: var(--text-light); }

a { color: #b48500; text-decoration: none; }
a:hover { text-decoration: underline; }

@media (max-width: 560px) {
  .content { padding: 24px; }
  .header { padding: 40px 20px; }
}