/*
Theme Name: Moon Binder Clean
Author: Hitoshi & Aru
Description: Binder UI theme (stable + fixed links) + JS rings
Version: 1.2
*/

:root{
  --bg1:#eef2f7; --bg2:#e6ebf2;
  --paper:#fff; --paper-border:#d7dee8;
  --spine-bg:#f4f6f9; --spine-border:#e2e8f0;
  --text:#1e293b; --muted:#94a3b8;
  --metal1:#c9d2df; --metal2:#8e9aab; --metal3:#5f6b7a;
  --hole-edge:#8a96a8; --hole-shadow: rgba(0,0,0,0.28);
}

*{ box-sizing:border-box; }

html,body{
  margin:0; min-height:100%;
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
  background:
    radial-gradient(1200px 700px at 70% 15%, #ffffff 0%, transparent 60%),
    linear-gradient(135deg, var(--bg1), var(--bg2));
  color:var(--text);
  overflow-x:hidden;
}

/* ====== ステージ：grid（リングとカードは同じ高さで同期） ====== */
.stage{
  position: relative;
  width: min(980px, 92vw);
  margin: 40px auto;

  display: grid;
  grid-template-columns: 64px 1fr;
  align-items: stretch;
}

.stage::before{
  content:"";
  position:absolute;
  inset: 22px 10px 10px 52px;
  border-radius: 14px;
  background: rgba(15, 23, 42, 0.06);
  filter: blur(18px);
  z-index: 0;
}

/* ====== バインダー（レイアウト要素） ====== */
.binder{
  z-index: 2;
  pointer-events:none;

  /* 右へ食い込ませて“外側リング”っぽく */
  margin-right: -44px;

  display:flex;
  justify-content:center;
}

.binder-rail{
  width: 34px;
  border-radius: 10px;
  background: linear-gradient(to right, #f8fafc, var(--spine-bg));
  border: 1px solid var(--spine-border);
  box-shadow:
    0 10px 24px rgba(15,23,42,0.10),
    inset -6px 0 10px rgba(148,163,184,0.12);

  display:flex;
  flex-direction:column;

  /* ★ここがポイント：間隔は固定。増減はJSでやる */
  justify-content:flex-start;
  gap: 18px;

  padding: 18px 0;
  height: 100%;
  overflow: hidden;
}

/* リング（1セット） */
.ring-set{ position: relative; height: 38px; flex-shrink:0; }

.ring-wire{
  position:absolute;
  left: -18px;
  top:50%;
  transform: translateY(-50%);
  width: 58px;
  height: 28px;
  border-radius: 999px;
  border: 4px solid transparent;
  background:
    linear-gradient(#0000,#0000) padding-box,
    linear-gradient(135deg, var(--metal2), var(--metal1), var(--metal3)) border-box;
  box-shadow: 0 8px 16px rgba(0,0,0,0.12);
  z-index: 1;
}
.ring-wire::after{
  content:"";
  position:absolute;
  inset: -4px;
  border-radius: 999px;
  border: 4px solid transparent;
  background:
    linear-gradient(#0000,#0000) padding-box,
    linear-gradient(135deg, var(--metal1), #ffffff, var(--metal2)) border-box;
  z-index: 3;
  -webkit-mask: radial-gradient(circle 12px at 64% 50%, transparent 0 12px, #000 13px);
          mask: radial-gradient(circle 12px at 64% 50%, transparent 0 12px, #000 13px);
}
.hole{
  position:absolute;
  left: 14px;
  top:50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid var(--hole-edge);
  box-shadow:
    inset 2px 2px 5px var(--hole-shadow),
    inset -1px -1px 2px rgba(255,255,255,0.75);
  z-index: 2;
}

/* ====== カード本体 ====== */
.main-card{
  position: relative;
  z-index: 1;
  width: 100%;
  background: var(--paper);
  border: 1px solid var(--paper-border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow:
    0 24px 60px rgba(15, 23, 42, 0.10),
    0 6px 18px rgba(15, 23, 42, 0.08);
  display:flex;
  min-height: 85vh;
  height: auto;
  grid-column: 2;
}

.paper-gutter{
  width: 28px;
  flex: 0 0 28px;
  border-right: 1px solid rgba(148,163,184,0.15);
  background: linear-gradient(to right, rgba(148,163,184,0.08), transparent 55%);
}

.main-content{
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:left;
  padding: 40px 60px;
}

/* header */
.site-header{ width:100%; text-align:center; margin-bottom:26px; }
.site-title{ margin:0 0 10px; font-size:2.2rem; letter-spacing:0.22em; }
.site-title a{ color:inherit; text-decoration:none; }
.site-tagline{ margin:0 0 18px; font-size:0.82rem; letter-spacing:0.42em; color:var(--muted); display:block; }
.top-nav{ width:100%; text-align:right; font-size:0.9rem; font-family:sans-serif; }
.top-nav a{ color:var(--muted); text-decoration:none; margin:0 10px; transition:0.3s; }
.top-nav a:hover{ color:var(--text); }
.sep{ color:#e2e8f0; }
.divider{ width:100%; height:1px; background:rgba(148,163,184,0.30); margin:18px 0; }

/* posts */
article{ width:100%; margin-bottom:50px; }
.post-date{ color:var(--muted); font-size:0.9rem; font-family:monospace; }
.post-title{ font-size:1.6rem; margin:6px 0 14px; line-height:1.4; }
.post-title a{ color:inherit; text-decoration:none; }
.post-content{ line-height:1.9; color:#475569; }
.post-content p{ margin:0 0 1.4em; }
.post-content img{ max-width:100%; height:auto; border-radius:6px; margin:10px 0; }
.read-more{ display:inline-block; font-size:0.9rem; color:var(--text); text-decoration:underline; margin-top:10px; }

/* buttons */
.btn-row{ margin-top:54px; display:flex; justify-content:center; gap:20px; flex-wrap:wrap; }
.btn-home{
  display:inline-block;
  text-decoration:none;
  padding:12px 40px;
  background:#1e293b;
  color:#fff;
  border-radius:50px;
  font-size:0.9rem;
  transition:opacity 0.3s;
}
.btn-home:hover{ opacity:0.85; }

/* pagination */
.pagination{
  text-align:center;
  margin-top:60px;
  display:flex;
  justify-content:center;
  gap:8px;
}
.pagination .page-numbers{
  display:inline-block;
  padding:8px 16px;
  border:1px solid var(--paper-border);
  border-radius:6px;
  text-decoration:none;
  color:var(--muted);
  font-size:0.9rem;
  transition:0.3s;
}
.pagination .page-numbers:hover{ background:var(--bg1); color:var(--text); }
.pagination .current{ background:var(--text); color:#fff; border-color:var(--text); }

@media (max-width: 768px){
  .stage{ margin:18px auto; width:96%; display:block; }
  .stage::before{ display:none; }
  .binder, .paper-gutter{ display:none; }
  .main-card{ border-radius:0; border:none; min-height:100vh; }
  .main-content{ padding:28px 18px; }
  .site-title{ font-size:1.8rem; }
}