@charset "utf-8";

/* =========================================
   Aboutページ専用スタイル
   ========================================= */
.about-wrapper { 
  max-width: 1000px; 
  width: 100%; 
  margin: 0 auto; 
}

.about-spacer {
  height: 40px;
}

.about-card {
  background-color: var(--bg-card); 
  border: 1px solid var(--color-border); 
  border-radius: 12px;
  padding: 30px 40px; 
  margin-bottom: 30px; 
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.about-section-title {
  font-size: 1.35rem;
  color: #ffffff; 
  margin: 0 0 20px 0; 
  padding-left: 12px;
  border-left: 5px solid var(--color-primary); 
  line-height: 1.4; 
  font-weight: bold;
}

.about-sub-title {
  font-size: 1.1rem; 
  color: #fff; 
  margin-top: 30px; 
  margin-bottom: 15px;
  display: flex; 
  align-items: center; 
  gap: 10px;
}
.about-sub-title::before {
  content: ''; display: block; width: 6px; height: 6px;
  background-color: var(--color-primary); border-radius: 50%;
}

.about-divider { border: 0; height: 1px; background-color: var(--color-border); margin: 30px 0; }

.about-text { font-size: 0.95rem; line-height: 1.7; color: #ddd; margin-bottom: 20px; }
.about-text strong { color: #fff; border-bottom: 1px solid #555; }

.rights-note {
  margin-top: 1.5em; padding-top: 1em; border-top: 1px solid var(--color-border); font-size: 0.85em; color: #aaa;
}

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 15px; margin-top: 10px; }

.feature-item {
  background-color: #333; border: 1px solid var(--color-border); border-radius: 8px;
  padding: 15px 20px; transition: transform 0.2s ease, border-color 0.2s;
}
.feature-item:hover { border-color: var(--color-border-hover); transform: translateY(-2px); }

.feature-title {
  color: var(--color-primary); font-size: 1.05rem; font-weight: bold;
  margin-bottom: 8px; display: flex; align-items: center; gap: 8px;
}
.feature-desc { font-size: 0.85rem; color: #ccc; line-height: 1.6; margin: 0; }

.condition-box {
  background-color: #333; padding: 20px; border-radius: 8px;
  margin: 15px 0; border: 1px solid var(--color-border);
}
.condition-title { margin: 0 0 5px 0; font-weight: bold; color: #fff; font-size: 0.95rem; }
.condition-desc { font-size: 0.9rem; line-height: 1.6; margin-bottom: 10px; color: #ddd;}
.condition-list { margin: 0 0 15px 0; padding-left: 1.5em; color: #ddd; line-height: 1.6; font-size: 0.9rem;}
.condition-sub-text { display: block; font-size: 0.85em; color: #aaa; margin-top: 5px; line-height: 1.5; }
.condition-note { font-size: 0.85em; color: #bbb; margin: 0; }

.dm-button-area { margin-top: 25px; text-align: center; }
.dm-button {
  display: inline-flex; align-items: center; gap: 8px; background-color: #1a1a1a;
  color: #fff; padding: 12px 24px; border-radius: 30px; text-decoration: none;
  font-weight: bold; font-size: 0.95rem; border: 1px solid var(--color-border); transition: background-color 0.2s, transform 0.2s;
}
.dm-button:hover { background-color: #333; border-color: var(--color-border-hover); transform: scale(1.05); text-decoration: none; }
.dm-icon { width: 18px; height: 18px; fill: currentColor; }

.update-log-container { margin-top: 10px; }
.update-row { display: flex; border-bottom: 1px solid #333; padding: 15px 0; }
.update-row:last-child { border-bottom: none; }

.update-date {
  width: 110px; flex-shrink: 0; font-family: 'Helvetica Neue', monospace;
  color: var(--color-primary); font-weight: bold; font-size: 0.9rem; padding-top: 2px;
}
.update-content { flex-grow: 1; }
.update-desc-text { margin: 5px 0 0 0; font-size: 0.9rem; color: #ddd; line-height: 1.6; }

.tag {
  display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 10px;
  font-weight: bold; color: #fff; letter-spacing: 0.05em; box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
.tag.new { background-color: #ff4d4f; }
.tag.update { background-color: var(--color-primary); color: #1a1a1a; }
.tag.fix { background-color: #2ecc71; color: #1a1a1a; }

/* ==========================================================
   レスポンシブ設定
   ========================================================== */
@media (max-width: 768px) {
  .about-card { padding: 25px 20px; }
  .update-row { flex-direction: column; }
  .update-date { margin-bottom: 8px; border-left: 3px solid #444; padding-left: 10px; width: 100%; }
  .feature-grid { grid-template-columns: 1fr; }
}