/* ===========================================================
   受験診断ドットコム - 共通スタイル
   トークン: インク紺 × 紙クリーム × アンバー(卓上ライト) × レベル別配色
   =========================================================== */

:root{
  --ink:#0e0e11;
  --ink-soft:#1a1a1f;
  --ink-softer:#232329;
  --paper:#f6f1e4;
  --paper-dim:#eee7d4;
  --text-on-ink:#f3f1ea;
  --text-on-ink-muted:#8c8c94;
  --text-on-paper:#1b2130;
  --amber:#e8a33d;
  --amber-deep:#c47f1f;
  --lv1:#4b8b6b; /* 基礎 */
  --lv2:#3d6fb4; /* 標準 */
  --lv3:#db7f2e; /* 応用 */
  --lv4:#b23a3a; /* 難関 */
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:
    radial-gradient(ellipse 900px 500px at 15% -10%, rgba(232,163,61,0.10), transparent 60%),
    var(--ink);
  color:var(--text-on-ink);
  font-family:'Zen Kaku Gothic New', sans-serif;
  min-height:100vh;
  line-height:1.7;
}
a{color:inherit;}

.wrap{
  max-width:960px;
  margin:0 auto;
  padding:0 20px;
}

/* --- header / nav --- */
.site-header{
  padding:26px 0 0;
}
.site-header .wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.logo{
  font-family:'Shippori Mincho', serif;
  font-weight:800;
  font-size:18px;
  letter-spacing:0.03em;
  text-decoration:none;
  color:var(--text-on-ink);
  display:flex;
  align-items:center;
  gap:8px;
}
.logo .mark{
  width:28px;
  height:28px;
  border-radius:5px;
  display:inline-flex;
  object-fit:cover;
}
.nav-links{
  display:flex;
  gap:22px;
  font-size:13.5px;
  font-weight:700;
}
.nav-links a{
  text-decoration:none;
  color:var(--text-on-ink-muted);
  transition:color .15s ease;
}
.nav-links a:hover{color:var(--amber);}

/* --- footer --- */
.site-footer{
  margin-top:80px;
  border-top:1px solid rgba(255,255,255,0.08);
  padding:28px 0 40px;
}
.site-footer .wrap{
  display:flex;
  flex-wrap:wrap;
  gap:16px;
  justify-content:space-between;
  align-items:center;
  font-size:12.5px;
  color:var(--text-on-ink-muted);
}
.footer-links{
  display:flex;
  gap:18px;
}
.footer-links a{
  text-decoration:none;
  color:var(--text-on-ink-muted);
}
.footer-links a:hover{color:var(--amber);}

/* --- generic card (paper) --- */
.card{
  background:var(--paper);
  color:var(--text-on-paper);
  border-radius:14px;
  padding:36px 32px;
  box-shadow:0 24px 60px -20px rgba(0,0,0,0.55);
  position:relative;
  overflow:hidden;
}
.card::before{
  content:'';
  position:absolute;
  top:0; left:0; bottom:0;
  width:5px;
  background:var(--amber);
}

.eyebrow{
  font-size:13px;
  letter-spacing:0.14em;
  color:var(--amber);
  font-weight:700;
  margin-bottom:10px;
}
h1,h2,h3{
  font-family:'Shippori Mincho', serif;
}

.btn{
  display:inline-block;
  font-family:'Zen Kaku Gothic New', sans-serif;
  font-weight:700;
  font-size:14px;
  padding:12px 24px;
  border-radius:999px;
  text-decoration:none;
  cursor:pointer;
}
.btn-primary{
  background:var(--amber);
  color:var(--ink);
  border:none;
}
.btn-primary:hover{background:#f0b357;}
.btn-ghost{
  background:none;
  border:1px solid rgba(255,255,255,0.25);
  color:var(--text-on-ink);
}
.btn-ghost:hover{border-color:var(--amber); color:var(--amber);}

.disclaimer{
  font-size:11.5px;
  color:var(--text-on-ink-muted);
  line-height:1.8;
}