/* ── リセット＆変数 ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#1a3a5c;--primary-light:#2d5f8a;
  --accent:#e8722a;--accent-light:#f4924d;
  --bg:#f7f5f0;--card:#fff;
  --text:#2c2c2c;--muted:#6b6b6b;--border:#e0dbd2;
  --ok:#2e7d52;--ng:#c0392b;
  --sh:0 2px 12px rgba(26,58,92,.08);--sh2:0 6px 24px rgba(26,58,92,.14);
  --r:10px;--rl:16px;
}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans JP',sans-serif;background:var(--bg);color:var(--text);line-height:1.75;font-size:15px}
a{color:var(--primary-light);text-decoration:none}
a:hover{color:var(--accent)}
img{max-width:100%}

/* ── ヘッダー ── */
.hdr{background:var(--primary);color:#fff;padding:0 16px;position:sticky;top:0;z-index:100;box-shadow:0 2px 8px rgba(0,0,0,.18)}
.hdr .in{max-width:960px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:56px}
.hdr .logo{font-family:'Kaisei Opti',serif;font-size:1.1rem;font-weight:700;color:#fff}
.hdr nav{display:flex;gap:20px}
.hdr nav a{color:rgba(255,255,255,.85);font-size:.82rem;font-weight:500;transition:color .2s}
.hdr nav a:hover,.hdr nav a.active{color:#fff}

/* ── フッター ── */
.ftr{background:var(--primary);color:rgba(255,255,255,.75);padding:40px 16px 24px;margin-top:64px}
.ftr .in{max-width:960px;margin:0 auto}
.ftr-grid{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:20px;margin-bottom:28px}
.ftr h3{color:#fff;font-size:.88rem;margin-bottom:10px;font-family:'Kaisei Opti',serif}
.ftr ul{list-style:none}
.ftr ul li{margin-bottom:5px}
.ftr ul a{color:rgba(255,255,255,.65);font-size:.8rem;transition:color .2s}
.ftr ul a:hover{color:#fff}
.ftr .copy{border-top:1px solid rgba(255,255,255,.15);padding-top:18px;text-align:center;font-size:.76rem;color:rgba(255,255,255,.45)}

/* ── ページラッパー ── */
.wrap{max-width:960px;margin:0 auto;padding:40px 16px}
.wrap-sm{max-width:680px;margin:0 auto;padding:40px 16px}

/* ── ページ切替（SPA） ── */
.page{display:none}
.page.active{display:block}

/* ── ヒーロー ── */
.hero{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);color:#fff;padding:64px 16px;text-align:center}
.hero h1{font-family:'Kaisei Opti',serif;font-size:clamp(1.7rem,5vw,2.5rem);margin-bottom:14px;line-height:1.35}
.hero p{font-size:1rem;color:rgba(255,255,255,.85);max-width:540px;margin:0 auto 28px}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}

/* ── ボタン ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:12px 24px;border-radius:8px;font-size:.95rem;font-weight:700;font-family:'Noto Sans JP',sans-serif;cursor:pointer;transition:all .2s;border:none;text-decoration:none}
.btn-p{background:var(--accent);color:#fff;box-shadow:0 3px 10px rgba(232,114,42,.3)}
.btn-p:hover{background:var(--accent-light);transform:translateY(-1px);box-shadow:0 5px 16px rgba(232,114,42,.38);color:#fff}
.btn-s{background:var(--primary);color:#fff}
.btn-s:hover{background:var(--primary-light);transform:translateY(-1px);color:#fff}
.btn-o{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-o:hover{background:var(--primary);color:#fff}
.btn-w{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.6)}
.btn-w:hover{background:rgba(255,255,255,.15);color:#fff}
.btn-blk{background:#000;color:#fff}
.btn-blk:hover{background:#222;color:#fff}

/* ── カード ── */
.card{background:var(--card);border-radius:var(--rl);padding:24px;box-shadow:var(--sh);border:1px solid var(--border)}

/* ── セクションタイトル ── */
.sec-ttl{font-family:'Kaisei Opti',serif;font-size:1.35rem;color:var(--primary);margin-bottom:20px;position:relative;display:inline-block}
.sec-ttl::after{content:"";display:block;width:100%;height:3px;background:var(--accent);border-radius:2px;margin-top:4px}

/* ── 広告スロット ── */
.ad{background:#f0ede8;border:1px dashed #c8c0b5;border-radius:var(--r);min-height:90px;display:flex;align-items:center;justify-content:center;color:#a09890;font-size:.78rem;margin:28px 0}

/* ── トップページ ── */
.feat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-bottom:40px}
.feat-card{background:var(--card);border-radius:var(--rl);padding:20px 16px;border:1px solid var(--border);box-shadow:var(--sh)}
.feat-card .fi{font-size:1.8rem;margin-bottom:8px}
.feat-card h3{font-size:.95rem;color:var(--primary);margin-bottom:6px}
.feat-card p{font-size:.82rem;color:var(--muted);line-height:1.55}

.genre-show{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:32px}
.genre-chip{background:var(--card);border:2px solid var(--border);border-radius:var(--r);padding:16px;text-align:center;cursor:pointer;transition:all .18s;display:block}
.genre-chip:hover{border-color:var(--accent);box-shadow:var(--sh)}
.genre-chip .gi{font-size:1.5rem;display:block;margin-bottom:4px}
.genre-chip .gn{font-size:.88rem;font-weight:700;color:var(--primary);display:block}

.art-list{display:flex;flex-direction:column;gap:10px}
.art-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:16px 18px;display:flex;align-items:center;gap:14px;cursor:pointer;transition:all .18s;box-shadow:var(--sh)}
.art-card:hover{border-color:var(--primary-light);box-shadow:var(--sh2);transform:translateY(-1px)}
.art-card .ai{font-size:1.5rem;flex-shrink:0}
.art-card h3{font-size:.93rem;color:var(--primary);margin-bottom:3px}
.art-card p{font-size:.8rem;color:var(--muted)}
.art-card .arr{margin-left:auto;color:var(--muted);font-size:.85rem;flex-shrink:0}

/* ── クイズ：スタート ── */
.start-hero{text-align:center;padding:36px 0 24px}
.start-hero .si{font-size:3rem;margin-bottom:12px}
.start-hero h1{font-family:'Kaisei Opti',serif;font-size:clamp(1.4rem,5vw,1.9rem);color:var(--primary);margin-bottom:10px;line-height:1.4}
.start-hero p{color:var(--muted);font-size:.93rem}

.genre-sec h2{font-size:.82rem;font-weight:700;color:var(--muted);letter-spacing:.08em;margin-bottom:14px}
.genre-grid{display:grid;grid-template-columns:1fr 1fr;gap:11px;margin-bottom:28px}
.gnr-btn{background:var(--card);border:2px solid var(--border);border-radius:var(--r);padding:15px 12px;cursor:pointer;text-align:center;transition:all .2s;font-family:'Noto Sans JP',sans-serif}
.gnr-btn:hover{border-color:var(--primary-light);box-shadow:var(--sh)}
.gnr-btn.sel{border-color:var(--accent);background:#fff8f4;box-shadow:0 0 0 3px rgba(232,114,42,.12)}
.gnr-btn .gicon{font-size:1.5rem;display:block;margin-bottom:4px}
.gnr-btn .gname{font-size:.85rem;font-weight:700;color:var(--primary);display:block}
.gnr-btn .gcnt{font-size:.73rem;color:var(--muted)}

.rule-box{background:#fff;border-radius:12px;border:1px solid var(--border);padding:18px 20px;margin-top:24px}
.rule-box h3{font-size:.85rem;color:var(--muted);margin-bottom:12px;letter-spacing:.05em}
.rule-box ul{font-size:.85rem;color:#444;list-style:none;padding:0;display:flex;flex-direction:column;gap:7px}

/* ── クイズ：プレイ ── */
.qstatus{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.lives{display:flex;gap:4px}
.life{font-size:1.2rem;transition:all .3s}
.life.lost{opacity:.22;filter:grayscale(1);transform:scale(.85)}
.prog-txt{font-size:.82rem;color:var(--muted);font-weight:500}
.gbadge{background:var(--primary);color:#fff;font-size:.72rem;font-weight:700;padding:3px 10px;border-radius:20px}

.timer-wrap{margin-bottom:14px}
.t-bg{background:var(--border);border-radius:4px;height:6px;overflow:hidden}
.t-bar{height:100%;border-radius:4px;background:linear-gradient(90deg,var(--ok),#7bc67e);transition:width 1s linear,background .5s}
.t-bar.warn{background:linear-gradient(90deg,var(--ng),#e57373)}
.t-txt{font-size:.8rem;color:var(--muted);text-align:right;margin-top:3px}

.q-card{background:var(--card);border-radius:var(--rl);padding:22px;box-shadow:var(--sh);border:1px solid var(--border);margin-bottom:14px}
.q-meta{font-size:.75rem;color:var(--muted);margin-bottom:10px;display:flex;gap:10px;align-items:center}
.diff span{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--border);margin-right:2px}
.diff span.on{background:var(--accent)}
.q-txt{font-size:clamp(.95rem,3vw,1.08rem);font-weight:500;line-height:1.65}

.choices{display:flex;flex-direction:column;gap:10px;margin-bottom:14px}
.ch-btn{background:var(--card);border:2px solid var(--border);border-radius:var(--r);padding:13px 15px;text-align:left;cursor:pointer;font-family:'Noto Sans JP',sans-serif;font-size:.9rem;line-height:1.5;color:var(--text);transition:all .18s;display:flex;align-items:flex-start;gap:10px;width:100%}
.ch-btn:hover:not(:disabled){border-color:var(--primary-light);box-shadow:var(--sh);transform:translateY(-1px)}
.ch-btn:disabled{cursor:default}
.ch-ltr{background:var(--bg);color:var(--muted);border-radius:6px;min-width:26px;height:26px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.8rem;flex-shrink:0;transition:all .18s}
.ch-btn.ok{border-color:var(--ok);background:#eef7f2}
.ch-btn.ok .ch-ltr{background:var(--ok);color:#fff}
.ch-btn.ng{border-color:var(--ng);background:#fdf0ef}
.ch-btn.ng .ch-ltr{background:var(--ng);color:#fff}
.ch-btn.dim{opacity:.42}

.exp-card{background:#f0f4f8;border-radius:var(--r);padding:15px 17px;margin-bottom:14px;border-left:4px solid var(--primary-light);animation:su .3s ease}
.exp-card.ok-e{background:#eef7f2;border-left-color:var(--ok)}
.exp-card.ng-e{background:#fdf0ef;border-left-color:var(--ng)}
.exp-hd{font-weight:700;font-size:.87rem;margin-bottom:7px;display:flex;align-items:center;gap:6px}
.exp-card.ok-e .exp-hd{color:var(--ok)}
.exp-card.ng-e .exp-hd{color:var(--ng)}
.exp-txt{font-size:.87rem;line-height:1.65}
.exp-lnk{margin-top:8px;font-size:.8rem}
.exp-lnk a{color:var(--primary-light);font-weight:500;cursor:pointer}

@keyframes su{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* ── クイズ：リザルト ── */
.res-hero{text-align:center;padding:28px 0 18px}
.res-em{font-size:3.5rem;display:block;margin-bottom:12px}
.res-hero h2{font-family:'Kaisei Opti',serif;font-size:clamp(1.3rem,5vw,1.8rem);color:var(--primary);margin-bottom:6px}
.score-disp{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;border-radius:var(--rl);padding:24px;text-align:center;margin:18px 0}
.score-num{font-size:3rem;font-weight:700;font-family:'Kaisei Opti',serif;line-height:1;display:block}
.score-lbl{font-size:.85rem;opacity:.8;margin-top:4px}
.score-stats{display:flex;justify-content:center;gap:24px;margin-top:14px;padding-top:14px;border-top:1px solid rgba(255,255,255,.2)}
.stat-i{text-align:center}
.stat-n{font-size:1.3rem;font-weight:700}
.stat-l{font-size:.72rem;opacity:.75}

.lnk-hd{font-size:.83rem;font-weight:700;color:var(--muted);letter-spacing:.08em;margin-bottom:10px}
.lnk-cards{display:flex;flex-direction:column;gap:7px}
.lnk-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:12px 15px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;font-size:.87rem;color:var(--text);transition:all .18s}
.lnk-card:hover{border-color:var(--primary-light);box-shadow:var(--sh);color:var(--primary)}

.share-box{background:#f7f5f0;border:1px solid var(--border);border-radius:var(--r);padding:13px 15px;font-size:.82rem;line-height:1.65;color:var(--text);white-space:pre-wrap;margin:10px 0}
.res-acts{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:18px 0}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(60px);background:var(--primary);color:#fff;padding:10px 20px;border-radius:24px;font-size:.85rem;box-shadow:var(--sh2);transition:transform .3s ease;z-index:200;pointer-events:none}
.toast.show{transform:translateX(-50%) translateY(0)}

/* ── 記事ページ ── */
.art-body{max-width:720px;margin:0 auto}
.art-body h2{font-family:'Kaisei Opti',serif;font-size:1.25rem;color:var(--primary);border-left:4px solid var(--accent);padding-left:13px;margin:34px 0 13px;line-height:1.5}
.art-body h3{font-size:1.02rem;color:var(--primary);margin:22px 0 9px}
.art-body p{margin-bottom:14px;color:var(--text)}
.art-body ul,.art-body ol{margin:10px 0 14px 20px}
.art-body li{margin-bottom:5px}

.ex-box{background:#f0f4f8;border-left:3px solid var(--primary-light);border-radius:0 8px 8px 0;padding:14px 18px;margin:14px 0;font-size:.9rem}
.ex-box .lbl{font-size:.76rem;font-weight:700;color:var(--primary-light);margin-bottom:5px;letter-spacing:.05em}
.ex-ng{background:#fdf0ef;border-left-color:var(--ng)}.ex-ng .lbl{color:var(--ng)}
.ex-ok{background:#eef7f2;border-left-color:var(--ok)}.ex-ok .lbl{color:var(--ok)}
.tip-box{background:#fff8f0;border:1px solid #f5d5b8;border-radius:var(--r);padding:15px 18px;margin:18px 0}
.tip-box .tip-ttl{font-weight:700;color:var(--accent);margin-bottom:5px;font-size:.88rem}

/* ── サブページ共通 ── */
.pg-hero{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);color:#fff;padding:48px 16px;text-align:center}
.pg-hero h1{font-family:'Kaisei Opti',serif;font-size:clamp(1.4rem,5vw,2rem);margin-bottom:10px;line-height:1.4}
.pg-hero p{font-size:.93rem;color:rgba(255,255,255,.85)}

.bc{font-size:.78rem;color:var(--muted);margin-bottom:22px}
.bc a{color:var(--muted)}

.form-g{margin-bottom:18px}
.form-g label{display:block;font-size:.87rem;font-weight:700;color:var(--text);margin-bottom:5px}
.form-g .req{color:var(--ng);font-size:.75rem;margin-left:4px}
.form-g input,.form-g select,.form-g textarea{width:100%;border:1px solid var(--border);border-radius:8px;padding:11px 13px;font-family:'Noto Sans JP',sans-serif;font-size:.9rem;color:var(--text);background:#fff;transition:border .2s}
.form-g input:focus,.form-g select:focus,.form-g textarea:focus{outline:none;border-color:var(--primary-light);box-shadow:0 0 0 3px rgba(45,95,138,.1)}
.form-g textarea{resize:vertical;min-height:130px}
.form-note{font-size:.78rem;color:var(--muted);margin-top:3px}
.form-ok{display:none;background:#eef7f2;border:1px solid #a8d8bb;border-radius:var(--r);padding:20px;text-align:center;color:var(--ok);font-size:.95rem}

.sm-sec{margin-bottom:32px}
.sm-sec h2{font-family:'Kaisei Opti',serif;font-size:1.05rem;color:var(--primary);border-left:4px solid var(--accent);padding-left:12px;margin-bottom:12px}
.sm-list{list-style:none;padding:0}
.sm-list li a{display:flex;align-items:center;gap:8px;padding:9px 11px;border-radius:8px;color:var(--text);font-size:.9rem;transition:background .15s;cursor:pointer}
.sm-list li a:hover{background:#f0f4f8;color:var(--primary)}
.sm-list .desc{font-size:.76rem;color:var(--muted);margin-left:auto}

/* ── テーブル ── */
.info-table{width:100%;border-collapse:collapse;font-size:.9rem}
.info-table tr{border-bottom:1px solid var(--border)}
.info-table th{text-align:left;padding:10px 0;color:var(--muted);width:120px;font-weight:500}
.info-table td{padding:10px 0}

/* ── レスポンシブ ── */
@media(max-width:700px){
  .hdr nav{display:none}
  .ftr-grid{grid-template-columns:1fr 1fr}
  .feat-grid{grid-template-columns:1fr}
  .genre-show{grid-template-columns:1fr 1fr}
  .genre-grid{grid-template-columns:1fr 1fr}
  .res-acts{grid-template-columns:1fr}
}

/* ── 解説モーダル ── */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:300;display:flex;align-items:flex-end;justify-content:center;animation:fadeIn .2s ease}
@media(min-width:600px){.modal-overlay{align-items:center}}
.modal-box{background:#fff;border-radius:20px 20px 0 0;width:100%;max-width:620px;max-height:88vh;overflow-y:auto;padding:0 0 32px;animation:slideUp2 .25s ease}
@media(min-width:600px){.modal-box{border-radius:16px;max-height:80vh}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideUp2{from{transform:translateY(40px);opacity:0}to{transform:translateY(0);opacity:1}}
.modal-header{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--border);padding:16px 20px 14px;display:flex;align-items:flex-start;justify-content:space-between;gap:12px;z-index:1}
.modal-header h2{font-family:'Kaisei Opti',serif;font-size:1rem;color:var(--primary);line-height:1.45;flex:1}
.modal-close{background:var(--bg);border:none;border-radius:50%;width:32px;height:32px;font-size:1.1rem;cursor:pointer;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:var(--muted)}
.modal-close:hover{background:var(--border)}
.modal-body{padding:20px 20px 0}
.modal-genre{display:inline-block;background:var(--primary);color:#fff;border-radius:20px;padding:2px 12px;font-size:.74rem;font-weight:700;margin-bottom:16px}
.modal-q-box{background:var(--bg);border:1px solid var(--border);border-radius:var(--rl);padding:15px 18px;margin-bottom:18px}
.modal-q-label{font-size:.72rem;font-weight:700;color:var(--muted);letter-spacing:.07em;margin-bottom:6px}
.modal-q-text{font-size:.93rem;font-weight:500;line-height:1.6;color:var(--text);margin-bottom:10px}
.modal-ans{display:inline-flex;align-items:center;gap:5px;background:#eef7f2;color:var(--ok);border-radius:6px;padding:4px 11px;font-size:.83rem;font-weight:700}
.modal-section{margin-bottom:18px}
.modal-section h3{font-family:'Kaisei Opti',serif;font-size:.95rem;color:var(--primary);border-left:3px solid var(--accent);padding-left:10px;margin-bottom:10px}
.modal-section p{font-size:.88rem;line-height:1.8;color:var(--text)}
.modal-ex-list{display:flex;flex-direction:column;gap:7px}
.modal-ex-item{border-radius:7px;padding:9px 13px;font-size:.87rem;line-height:1.55;display:flex;gap:8px;align-items:flex-start}
.modal-ex-ok{background:#eef7f2;border-left:3px solid var(--ok)}
.modal-ex-ng{background:#fdf0ef;border-left:3px solid var(--ng)}
.modal-note{background:#fff8f0;border:1px solid #f5d5b8;border-radius:var(--r);padding:12px 15px;margin-top:4px}
.modal-note-ttl{font-size:.78rem;font-weight:700;color:var(--accent);margin-bottom:4px}
.modal-note-txt{font-size:.85rem;line-height:1.7;color:var(--text)}


/* ── 追加スタイル ── */
/* 回答履歴カード */
.history-cards { display: flex; flex-direction: column; gap: 14px; margin-top: 8px; }
.h-card {
  background: var(--card);
  border-radius: var(--rl);
  padding: 18px 20px;
  border: 1px solid var(--border);
  box-shadow: var(--sh);
}
.h-card.wrong { border-left: 4px solid var(--ng); }
.h-card.correct { border-left: 4px solid var(--ok); }
.h-card-num { font-size: .72rem; font-weight: 700; color: var(--muted); letter-spacing: .06em; margin-bottom: 6px; }
.h-card-q { font-size: .93rem; font-weight: 500; color: var(--text); margin-bottom: 12px; line-height: 1.6; }
.h-card-rows { display: flex; flex-direction: column; gap: 5px; margin-bottom: 10px; }
.h-card-row { display: flex; gap: 8px; font-size: .84rem; line-height: 1.5; }
.h-card-row .lbl { color: var(--muted); flex-shrink: 0; width: 80px; }
.h-card-row .val { color: var(--text); }
.h-card-row .val.wrong { color: var(--ng); font-weight: 500; }
.h-card-row .val.ok { color: var(--ok); font-weight: 500; }
.h-card-exp { font-size: .83rem; color: var(--text); line-height: 1.65; background: #f7f5f0; border-radius: 8px; padding: 10px 13px; margin-bottom: 10px; }
.h-card-badge { display: inline-flex; align-items: center; gap: 4px; font-size: .78rem; font-weight: 700; padding: 3px 10px; border-radius: 20px; }
.h-card-badge.wrong { background: #fdf0ef; color: var(--ng); }
.h-card-badge.correct { background: #eef7f2; color: var(--ok); }
.h-detail-link { display: inline-flex; align-items: center; gap: 5px; margin-top: 8px; font-size: .82rem; color: var(--primary-light); font-weight: 500; text-decoration: none; }
.h-detail-link:hover { color: var(--accent); }

/* スコアサマリ */
.score-wrap { background: linear-gradient(135deg,var(--primary),var(--primary-light)); color:#fff; border-radius:var(--rl); padding:24px; text-align:center; margin-bottom:20px; }
.score-big { font-size:3rem; font-weight:700; font-family:'Kaisei Opti',serif; line-height:1; }
.score-sub { font-size:.85rem; opacity:.8; margin-top:4px; }
.score-stats { display:flex; justify-content:center; gap:24px; margin-top:14px; padding-top:14px; border-top:1px solid rgba(255,255,255,.2); }
.score-stat { text-align:center; }
.score-stat-n { font-size:1.3rem; font-weight:700; }
.score-stat-l { font-size:.72rem; opacity:.75; }

/* セクション見出し */
.result-section-ttl { font-size:.82rem; font-weight:700; color:var(--muted); letter-spacing:.08em; margin: 20px 0 10px; display:flex; align-items:center; gap:6px; }