:root{
  --max_width: 900px;
  --spacer: 24px;
  --radius: 12px;

  --text: #f8eedd;       /* 柔らかい白 */
  --muted: #b39c80;      /* 優しい薄茶 */
  --accent: #cfa86b;     /* 黄金アクセント */

  --font_family: "Noto Sans JP", system-ui, -apple-system, "Segoe UI", Roboto, Arial;
}

/* ======================
   基本レイアウト
   ====================== */

html,body{
  height:100%;
  margin:0;
  font-family:var(--font_family);
  color:var(--text);

  background:
    linear-gradient(
      180deg,
      #1a1108 0%,
      #3f2611 60%,
      #946b2d 100%
    );
  background-attachment: fixed; 
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

.container{
  max-width:var(--max_width);
  margin:0 auto;
  padding:calc(var(--spacer)*2) var(--spacer);
  box-sizing:border-box;
}

/* ======================
   ヘッダー
   ====================== */

.page_header_card{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:24px;
  border-radius:var(--radius);
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.06);
  backdrop-filter:blur(4px);
}

.page_title{
  font-size:26px;
  font-weight:700;
}

.page_subtitle{
  font-size:14px;
  color:var(--muted);
}

/* ======================
   コンテンツカード
   ====================== */

.content_card{
  margin-top:32px;
  padding:28px;
  border-radius:var(--radius);
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.06);
  box-shadow:0 8px 24px rgba(20,10,0,0.35);
  backdrop-filter:blur(4px);
}

.section_title{
  font-size:18px;
  font-weight:700;
  margin-bottom:12px;
}

.section_text{
  font-size:15px;
  color:var(--muted);
  line-height:1.7;
}

/* ======================
   ダウンロードBOX
   ====================== */

.download_item{
  padding:16px 0 4px 0;
  border-top:1px solid rgba(255,255,255,0.08);
}

/* 1行目：ファイル名＋ボタン */
.download_head{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  margin-bottom:10px;
}

.download_name{
  font-size:15px;
  font-weight:600;
  color:var(--text);
}

.download_button{
  display:inline-block;
  padding:10px 16px;
  background:var(--accent);
  color:#000;
  text-decoration:none;
  border-radius:8px;
  font-weight:700;
  box-shadow:0 4px 12px rgba(207,168,107,0.4);
  white-space:nowrap;
}

/* 2行目以降 */
.download_body{
  display:flex;
  flex-direction:column;
  gap:8px;
}

.download_date{
  font-size:13px;
  color:var(--muted);
}

.download_desc_intro{
  font-size:14px;
  color:var(--muted);
  line-height:1.7;
}

.download_desc_label{
  margin-top:10px;
  font-size:14px;
  font-weight:700;
  color:var(--muted);
}

.download_desc_list{
  margin:4px 0 0 0;
  padding:0 0 0 16px;
  list-style:none;
}

.download_desc_list li{
  font-size:14px;
  color:var(--muted);
  line-height:1.7;
}

.download_desc_list strong{
  color:var(--text);
  font-weight:600;
}

/* スマホでは自然に縦並びへ */
@media(max-width:640px){
  .download_head{
    flex-direction:column;
    align-items:flex-start;
  }
}

/* ======================
   フッター
   ====================== */

.footer_container{
  padding-bottom:calc(var(--spacer) * 1.5);
  text-align:center;     /* ★中央そろえ */
}

.footer_note{
  font-size:13px;
  color:var(--muted);
  text-align:center;     /* ★安全のため二重ロック */
}