/* 会計実務マスター プライバシーポリシー・利用規約 */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue",
               "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic",
               Meiryo, sans-serif;
  color: #1c1c1e;
  background: linear-gradient(180deg, #E0EBFF 0%, #F7FAFF 240px, #FFFFFF 400px);
  line-height: 1.7;
  min-height: 100vh;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

/* Header */
.app-header {
  text-align: center;
  padding: 40px 0 24px;
}
.app-header h1 {
  font-size: 36px;
  margin: 0;
  color: #1a2368;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.app-header .tagline {
  color: #6e6e73;
  font-size: 15px;
  margin: 6px 0 0;
}

/* Navigation */
.doc-nav {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin: 24px 0 32px;
  padding: 6px;
  background: rgba(255,255,255,0.6);
  border-radius: 16px;
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}
.doc-nav a {
  padding: 10px 18px;
  border-radius: 12px;
  text-decoration: none;
  color: #3c3c43;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
}
.doc-nav a.active {
  background: linear-gradient(135deg, #478EFF, #2962E6);
  color: white;
  box-shadow: 0 4px 12px rgba(71, 142, 255, 0.35);
}
.doc-nav a:not(.active):hover {
  background: rgba(0,0,0,0.04);
}

/* Article */
article {
  background: white;
  border-radius: 18px;
  padding: 40px 36px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.04);
}
article h2 {
  font-size: 28px;
  margin: 0 0 8px;
  color: #1c1c1e;
}
article .updated {
  color: #8e8e93;
  font-size: 13px;
  margin: 0 0 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid #e5e5ea;
}
article section {
  margin-bottom: 28px;
}
article h3 {
  font-size: 17px;
  color: #1c1c1e;
  margin: 0 0 10px;
  font-weight: 700;
}
article p {
  margin: 0 0 10px;
  color: #3c3c43;
  font-size: 15px;
}
article ul {
  padding-left: 24px;
  color: #3c3c43;
  font-size: 15px;
}
article li {
  margin-bottom: 6px;
}

/* Footer */
footer {
  text-align: center;
  margin-top: 40px;
  color: #8e8e93;
  font-size: 12px;
}

/* Responsive */
@media (max-width: 600px) {
  main { padding: 20px 16px 60px; }
  .app-header h1 { font-size: 28px; }
  article { padding: 24px 20px; }
  article h2 { font-size: 22px; }
  article h3 { font-size: 16px; }
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  body {
    background: linear-gradient(180deg, #0F1C3D 0%, #1C1C1E 320px);
    color: #F2F2F7;
  }
  article {
    background: #1C1C1E;
    box-shadow: 0 2px 16px rgba(0,0,0,0.3);
  }
  article h2, article h3 { color: #F2F2F7; }
  article p, article ul { color: #D1D1D6; }
  article .updated { color: #8E8E93; border-color: #3A3A3C; }
  .app-header h1 { color: #8EB4FF; }
  .app-header .tagline { color: #AEAEB2; }
  .doc-nav {
    background: rgba(44, 44, 46, 0.6);
  }
  .doc-nav a { color: #D1D1D6; }
  .doc-nav a:not(.active):hover { background: rgba(255,255,255,0.08); }
  footer { color: #636366; }
}