/* ==========================================================
   G検定 無料模擬試験 — 共通スタイル
   ========================================================== */

:root{
  --bg:#f6f7fb;
  --surface:#ffffff;
  --surface-2:#f0f2f8;
  --border:#e2e6ef;
  --text:#1b2233;
  --text-sub:#5d6780;
  --text-mute:#8b94a8;
  --primary:#2f4bd8;
  --primary-dark:#1f36ad;
  --primary-soft:#eaeeff;
  --accent:#ff6b35;
  --accent-dark:#e8541d;
  --ok:#12a05f;
  --ok-soft:#e6f7ee;
  --ng:#e03b48;
  --ng-soft:#fdecee;
  --warn:#d99400;
  --radius:14px;
  --radius-sm:9px;
  --shadow:0 1px 2px rgba(20,30,60,.05), 0 8px 24px rgba(20,30,60,.06);
  --shadow-lg:0 4px 12px rgba(20,30,60,.08), 0 20px 48px rgba(20,30,60,.10);
  --maxw:1080px;
  --font: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI",
          "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP",
          "Yu Gothic UI", Meiryo, sans-serif;
}

@media (prefers-color-scheme: dark){
  :root{
    --bg:#12151e;
    --surface:#1a1f2b;
    --surface-2:#222836;
    --border:#2e3648;
    --text:#e8ecf5;
    --text-sub:#a7b0c4;
    --text-mute:#7d8699;
    --primary:#7b93ff;
    --primary-dark:#5b76f5;
    --primary-soft:#232a45;
    --accent:#ff7f4d;
    --accent-dark:#f2662f;
    --ok:#3ecf8e;
    --ok-soft:#16352a;
    --ng:#ff6b78;
    --ng-soft:#3a1f26;
    --shadow:0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.28);
    --shadow-lg:0 4px 12px rgba(0,0,0,.35), 0 20px 48px rgba(0,0,0,.4);
  }
}

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:var(--font); font-size:16px; line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; height:auto; }
a{ color:var(--primary); text-decoration:none; }
a:hover{ text-decoration:underline; }
h1,h2,h3,h4{ line-height:1.4; letter-spacing:.02em; margin:0 0 .6em; }
p{ margin:0 0 1em; }
ul,ol{ margin:0 0 1em; padding-left:1.4em; }
li{ margin-bottom:.35em; }
button{ font-family:inherit; font-size:inherit; }
:focus-visible{ outline:3px solid var(--primary); outline-offset:2px; border-radius:4px; }

.wrap{ max-width:var(--maxw); margin:0 auto; padding:0 20px; }
.wrap-narrow{ max-width:760px; margin:0 auto; padding:0 20px; }
.sr-only{
  position:absolute; width:1px; height:1px; padding:0; margin:-1px;
  overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; border:0;
}

/* ---------- ヘッダー ---------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--border);
}
.site-header .inner{
  max-width:var(--maxw); margin:0 auto; padding:10px 20px;
  display:flex; align-items:center; gap:16px;
}
.brand{ display:flex; align-items:center; gap:10px; font-weight:800; color:var(--text); font-size:1.02rem; letter-spacing:.03em; }
.brand:hover{ text-decoration:none; }
.brand .mark{
  width:32px; height:32px; border-radius:9px; flex:0 0 auto;
  background:linear-gradient(135deg,var(--primary),#6d8cff);
  color:#fff; display:grid; place-items:center; font-size:.86rem; font-weight:800;
}
.brand small{ display:block; font-size:.66rem; font-weight:600; color:var(--text-mute); letter-spacing:.06em; }
.header-nav{ margin-left:auto; display:flex; align-items:center; gap:6px; }
.header-nav a.navlink{
  color:var(--text-sub); font-size:.86rem; font-weight:600;
  padding:6px 10px; border-radius:8px;
}
.header-nav a.navlink:hover{ background:var(--surface-2); text-decoration:none; }
.header-nav .btn-cta{ white-space:nowrap; }
.header-nav .cta-short{ display:none; }
/* YouTubeはアイコンのみ。狭い画面でも隠さず常時表示する */
.header-nav .yt-link{
  flex:0 0 auto; width:34px; height:34px; padding:7px; border-radius:9px;
  display:inline-grid; place-items:center; color:#f00;
}
.header-nav .yt-link:hover{ background:var(--surface-2); text-decoration:none; }
/* 幅が足りない画面では商品名を略称にする（固定ヘッダーの2行折返しを防ぐ）。
   YouTubeアイコン分の横幅を確保するため、余白・字送りもあわせて詰める。 */
@media (max-width:640px){
  .header-nav a.navlink{ display:none; }
  .header-nav .cta-full{ display:none; }
  .header-nav .cta-short{ display:inline; }
  .site-header .inner{ gap:10px; padding:10px 16px; }
  .brand{ font-size:.94rem; letter-spacing:.01em; }
  .header-nav{ gap:2px; }
  .header-nav .yt-link{ width:30px; height:30px; padding:6px; }
  .header-nav .btn-sm{ padding:8px 13px; }
}
/* 320px級の端末はどう詰めてもサイト名が折り返すため、ヘッダーのYouTubeアイコンは省く。
   フッターと「動画で復習する」セクションの導線は残るので、経路自体は失われない。 */
@media (max-width:359px){
  .header-nav .yt-link{ display:none; }
}

/* ---------- ボタン ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:12px 22px; border-radius:999px; border:1px solid transparent;
  font-weight:700; font-size:.95rem; cursor:pointer; text-align:center;
  transition:transform .12s ease, box-shadow .12s ease, background .12s ease;
  line-height:1.4;
}
.btn:hover{ text-decoration:none; }
.btn:active{ transform:translateY(1px); }
.btn-primary{ background:var(--primary); color:#fff; box-shadow:0 4px 14px rgba(47,75,216,.28); }
.btn-primary:hover{ background:var(--primary-dark); }
.btn-cta{ background:var(--accent); color:#fff; box-shadow:0 6px 18px rgba(255,107,53,.32); }
.btn-cta:hover{ background:var(--accent-dark); }
.btn-ghost{ background:var(--surface); color:var(--text); border-color:var(--border); }
.btn-ghost:hover{ background:var(--surface-2); }
.btn-sm{ padding:8px 16px; font-size:.85rem; }
.btn-block{ display:flex; width:100%; }
.btn[disabled]{ opacity:.45; cursor:not-allowed; }

/* ---------- ヒーロー ---------- */
.hero{
  padding:56px 0 44px;
  background:
    radial-gradient(1000px 380px at 12% -10%, var(--primary-soft), transparent 65%),
    radial-gradient(760px 300px at 92% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 60%);
}
.hero .eyebrow{
  display:inline-flex; align-items:center; gap:7px;
  background:var(--surface); border:1px solid var(--border); color:var(--primary);
  font-size:.76rem; font-weight:700; letter-spacing:.08em;
  padding:6px 14px; border-radius:999px; margin-bottom:18px;
}
.hero h1{ font-size:clamp(1.7rem, 5.2vw, 2.7rem); font-weight:800; letter-spacing:.01em; margin-bottom:.5em; }
.hero h1 .hl{
  background:linear-gradient(transparent 62%, color-mix(in srgb, var(--accent) 38%, transparent) 62%);
}
.hero .lead{ font-size:1.03rem; color:var(--text-sub); max-width:620px; }
.hero-stats{ display:flex; flex-wrap:wrap; gap:26px; margin-top:26px; }
.hero-stats div{ line-height:1.3; }
.hero-stats b{ display:block; font-size:1.55rem; font-weight:800; color:var(--primary); }
.hero-stats span{ font-size:.78rem; color:var(--text-mute); font-weight:600; letter-spacing:.05em; }

/* ---------- セクション ---------- */
.section{ padding:52px 0; }
/* 固定ヘッダーの下にアンカー先が潜り込まないようにする */
section[id]{ scroll-margin-top:80px; }
.section-alt{ background:var(--surface); border-block:1px solid var(--border); }
.section-head{ margin-bottom:26px; }
.section-head h2{ font-size:1.4rem; font-weight:800; margin-bottom:.3em; }
.section-head p{ color:var(--text-sub); font-size:.93rem; margin:0; }

/* ---------- カード ---------- */
.card{
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius); box-shadow:var(--shadow); padding:22px;
}
.grid{ display:grid; gap:16px; }
.grid-3{ grid-template-columns:repeat(3,1fr); }
.grid-2{ grid-template-columns:repeat(2,1fr); }
@media (max-width:860px){ .grid-3{ grid-template-columns:1fr; } .grid-2{ grid-template-columns:1fr; } }

.mode-card{
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius);
  box-shadow:var(--shadow); padding:24px 22px; display:flex; flex-direction:column;
  transition:transform .14s ease, box-shadow .14s ease, border-color .14s ease;
}
.mode-card:hover{ transform:translateY(-3px); box-shadow:var(--shadow-lg); border-color:color-mix(in srgb,var(--primary) 40%,var(--border)); }
.mode-card.featured{ border-color:var(--primary); border-width:2px; }
.mode-card .tag{
  align-self:flex-start; font-size:.68rem; font-weight:800; letter-spacing:.09em;
  background:var(--primary); color:#fff; padding:3px 10px; border-radius:999px; margin-bottom:12px;
}
.mode-card h3{ font-size:1.16rem; font-weight:800; margin-bottom:.35em; }
.mode-card .meta{ font-size:.8rem; color:var(--primary); font-weight:800; letter-spacing:.05em; margin-bottom:10px; }
.mode-card p{ font-size:.9rem; color:var(--text-sub); flex:1; }

/* ---------- 分野チップ ---------- */
.chips{ display:flex; flex-wrap:wrap; gap:9px; }
.chip{
  border:1px solid var(--border); background:var(--surface); color:var(--text);
  padding:9px 15px; border-radius:999px; font-size:.86rem; font-weight:600; cursor:pointer;
  display:inline-flex; align-items:center; gap:8px; transition:all .12s ease;
}
.chip:hover{ border-color:var(--primary); }
.chip .n{ font-size:.72rem; color:var(--text-mute); font-weight:700; }
.chip .dot{ width:9px; height:9px; border-radius:50%; flex:0 0 auto; }
.chip[aria-pressed="true"]{ background:var(--primary); border-color:var(--primary); color:#fff; }
.chip[aria-pressed="true"] .n{ color:rgba(255,255,255,.8); }

/* ---------- CTA（販売導線） ---------- */
.cta-band{
  background:linear-gradient(135deg, #202a4d, #2f4bd8 55%, #4b63e8);
  color:#fff; border-radius:var(--radius); padding:30px 28px;
  box-shadow:var(--shadow-lg); position:relative; overflow:hidden;
}
.cta-band::after{
  content:""; position:absolute; right:-70px; top:-70px; width:250px; height:250px;
  background:radial-gradient(circle, rgba(255,255,255,.16), transparent 68%); pointer-events:none;
}
.cta-band h3{ font-size:1.3rem; font-weight:800; margin-bottom:.5em; color:#fff; }
.cta-band p{ color:rgba(255,255,255,.9); font-size:.94rem; }
.cta-band .badge{
  display:inline-block; background:rgba(255,255,255,.16); border:1px solid rgba(255,255,255,.3);
  font-size:.72rem; font-weight:800; letter-spacing:.08em; padding:4px 12px; border-radius:999px; margin-bottom:14px;
}
.cta-points{ list-style:none; padding:0; margin:16px 0 22px; }
.cta-points li{ position:relative; padding-left:26px; font-size:.92rem; color:rgba(255,255,255,.94); margin-bottom:8px; }
.cta-points li::before{
  content:"✓"; position:absolute; left:0; top:0; font-weight:900; color:#ffd166;
}
.cta-actions{ display:flex; flex-wrap:wrap; gap:12px; }
.cta-note{ font-size:.76rem; color:rgba(255,255,255,.7); margin:12px 0 0; }

.cta-inline{
  border:1px dashed color-mix(in srgb,var(--accent) 55%, var(--border));
  background:color-mix(in srgb,var(--accent) 7%, var(--surface));
  border-radius:var(--radius-sm); padding:14px 16px; font-size:.88rem; color:var(--text-sub);
  display:flex; gap:14px; align-items:center; flex-wrap:wrap;
}
.cta-inline strong{ color:var(--text); }

/* ---------- YouTube導線 ---------- */
.yt-band{
  background:var(--surface);
  border:1px solid color-mix(in srgb,#f00 24%, var(--border));
  border-left:5px solid #f00;
  border-radius:var(--radius); box-shadow:var(--shadow);
  padding:26px 26px 24px; display:flex; gap:22px; align-items:flex-start; flex-wrap:wrap;
}
.yt-band .yt-mark{
  flex:0 0 auto; width:54px; height:54px; padding:12px; border-radius:14px;
  background:#f00; color:#fff; display:grid; place-items:center;
}
.yt-band .yt-body{ flex:1 1 300px; min-width:0; }
.yt-band .yt-tag{
  display:inline-block; font-size:.68rem; font-weight:800; letter-spacing:.09em;
  background:color-mix(in srgb,#f00 12%, var(--surface)); color:#e02020;
  border:1px solid color-mix(in srgb,#f00 30%, var(--border));
  padding:3px 10px; border-radius:999px; margin-bottom:12px;
}
.yt-band h3{ font-size:1.2rem; font-weight:800; margin-bottom:.4em; }
.yt-band p{ font-size:.92rem; color:var(--text-sub); }
.yt-points{ list-style:none; padding:0; margin:0 0 20px; }
.yt-points li{ position:relative; padding-left:22px; font-size:.88rem; color:var(--text-sub); margin-bottom:6px; }
.yt-points li::before{ content:"▶"; position:absolute; left:0; top:0; color:#f00; font-size:.7rem; }
.btn-yt{ background:#f00; color:#fff; box-shadow:0 6px 18px rgba(255,0,0,.26); }
.btn-yt:hover{ background:#d40000; color:#fff; }
@media (prefers-color-scheme: dark){
  .yt-band .yt-tag{ color:#ff8080; }
}
@media (max-width:520px){
  .yt-band{ padding:22px 20px; gap:16px; }
  .yt-band .yt-mark{ width:44px; height:44px; padding:10px; border-radius:12px; }
}

/* ---------- 試験画面 ---------- */
.exam-bar{
  position:sticky; top:0; z-index:40; background:var(--surface);
  border-bottom:1px solid var(--border);
}
.exam-bar .inner{
  max-width:900px; margin:0 auto; padding:10px 16px;
  display:flex; align-items:center; gap:12px; flex-wrap:wrap;
}
.exam-bar .qcount{ font-size:.86rem; font-weight:800; letter-spacing:.04em; white-space:nowrap; }
.exam-bar .qcount b{ font-size:1.15rem; color:var(--primary); }
.timer{
  margin-left:auto; font-variant-numeric:tabular-nums; font-weight:800;
  font-size:1.02rem; padding:5px 13px; border-radius:999px;
  background:var(--surface-2); color:var(--text); white-space:nowrap;
}
.timer.warn{ background:#fff4e0; color:#a76a00; }
.timer.danger{ background:var(--ng-soft); color:var(--ng); animation:pulse 1.2s infinite; }
@keyframes pulse{ 50%{ opacity:.55; } }
.progress{ width:100%; height:5px; background:var(--surface-2); border-radius:999px; overflow:hidden; }
.progress i{ display:block; height:100%; background:linear-gradient(90deg,var(--primary),#6d8cff); transition:width .25s ease; }

.exam-main{ max-width:900px; margin:0 auto; padding:26px 16px 130px; }
.qcard{ background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); box-shadow:var(--shadow); padding:26px 24px; }
.qmeta{ display:flex; gap:8px; flex-wrap:wrap; align-items:center; margin-bottom:16px; }
.pill{
  font-size:.7rem; font-weight:800; letter-spacing:.06em; padding:4px 11px; border-radius:999px;
  background:var(--surface-2); color:var(--text-sub);
}
.pill.field{ background:var(--primary-soft); color:var(--primary); }
.pill.lv1{ background:var(--ok-soft); color:var(--ok); }
.pill.lv2{ background:#fff4e0; color:#a76a00; }
.pill.lv3{ background:var(--ng-soft); color:var(--ng); }
@media (prefers-color-scheme: dark){
  .pill.lv2{ background:#3a2f16; color:#e0b25a; }
  .timer.warn{ background:#3a2f16; color:#e0b25a; }
}
.qtext{ font-size:1.08rem; font-weight:700; line-height:1.85; margin-bottom:20px; }

.choices{ display:flex; flex-direction:column; gap:10px; }
.choice{
  display:flex; gap:13px; align-items:flex-start; width:100%; text-align:left;
  background:var(--surface); border:1.5px solid var(--border); border-radius:var(--radius-sm);
  padding:14px 16px; cursor:pointer; color:var(--text); font-size:.97rem; line-height:1.7;
  transition:border-color .12s ease, background .12s ease;
}
.choice:hover{ border-color:var(--primary); background:var(--primary-soft); }
.choice .key{
  flex:0 0 auto; width:27px; height:27px; border-radius:50%;
  border:1.5px solid var(--border); display:grid; place-items:center;
  font-size:.82rem; font-weight:800; color:var(--text-sub); background:var(--surface);
}
.choice[aria-pressed="true"]{ border-color:var(--primary); background:var(--primary-soft); }
.choice[aria-pressed="true"] .key{ background:var(--primary); border-color:var(--primary); color:#fff; }
.choice.correct{ border-color:var(--ok); background:var(--ok-soft); }
.choice.correct .key{ background:var(--ok); border-color:var(--ok); color:#fff; }
.choice.wrong{ border-color:var(--ng); background:var(--ng-soft); }
.choice.wrong .key{ background:var(--ng); border-color:var(--ng); color:#fff; }
.choice[disabled]{ cursor:default; }

/* 解説 */
.explain{ margin-top:18px; border-radius:var(--radius-sm); border:1px solid var(--border); overflow:hidden; }
.explain .head{ padding:10px 16px; font-weight:800; font-size:.88rem; letter-spacing:.05em; }
.explain.ok .head{ background:var(--ok-soft); color:var(--ok); }
.explain.ng .head{ background:var(--ng-soft); color:var(--ng); }
.explain .body{ padding:16px; font-size:.92rem; color:var(--text-sub); background:var(--surface); }
.explain .body p{ margin:0 0 10px; }
.refbox{
  margin-top:12px; padding:11px 14px; border-radius:var(--radius-sm);
  background:color-mix(in srgb,var(--accent) 8%, var(--surface));
  border:1px solid color-mix(in srgb,var(--accent) 30%, var(--border));
  font-size:.84rem; color:var(--text-sub);
}
.refbox b{ color:var(--text); }

/* 下部ナビ */
.exam-foot{
  position:fixed; left:0; right:0; bottom:0; z-index:45;
  background:color-mix(in srgb, var(--surface) 94%, transparent);
  backdrop-filter:blur(10px); border-top:1px solid var(--border);
  padding:11px 16px calc(11px + env(safe-area-inset-bottom));
}
.exam-foot .inner{ max-width:900px; margin:0 auto; display:flex; gap:10px; align-items:center; }
.exam-foot .spacer{ flex:1; }
.flagbtn{
  border:1px solid var(--border); background:var(--surface); color:var(--text-sub);
  border-radius:999px; padding:9px 15px; font-size:.84rem; font-weight:700; cursor:pointer;
}
.flagbtn[aria-pressed="true"]{ background:#fff4e0; border-color:var(--warn); color:#a76a00; }
@media (prefers-color-scheme: dark){ .flagbtn[aria-pressed="true"]{ background:#3a2f16; color:#e0b25a; } }

/* 問題パレット */
.palette{ display:grid; grid-template-columns:repeat(auto-fill,minmax(44px,1fr)); gap:8px; }
.palette button{
  aspect-ratio:1; border-radius:9px; border:1.5px solid var(--border); background:var(--surface);
  color:var(--text-sub); font-weight:800; font-size:.84rem; cursor:pointer;
}
.palette button.answered{ background:var(--primary-soft); border-color:var(--primary); color:var(--primary); }
.palette button.flagged{ border-color:var(--warn); box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--warn) 30%,transparent); }
.palette button.current{ background:var(--primary); border-color:var(--primary); color:#fff; }

dialog.modal{
  border:none; border-radius:var(--radius); padding:0; max-width:520px; width:calc(100% - 32px);
  background:var(--surface); color:var(--text); box-shadow:var(--shadow-lg);
}
dialog.modal::backdrop{ background:rgba(12,16,28,.55); backdrop-filter:blur(2px); }
dialog.modal .m-head{ padding:18px 22px 0; font-weight:800; font-size:1.05rem; }
dialog.modal .m-body{ padding:14px 22px; font-size:.92rem; color:var(--text-sub); max-height:56vh; overflow:auto; }
dialog.modal .m-foot{ padding:14px 22px 20px; display:flex; gap:10px; justify-content:flex-end; flex-wrap:wrap; }

/* ---------- 結果画面 ---------- */
.score-hero{ text-align:center; padding:36px 0 26px; }
.ring{ width:180px; height:180px; margin:0 auto 18px; position:relative; }
.ring svg{ transform:rotate(-90deg); }
.ring .val{
  position:absolute; inset:0; display:grid; place-content:center; text-align:center; line-height:1.1;
}
.ring .val b{ font-size:2.6rem; font-weight:800; letter-spacing:-.02em; }
.ring .val span{ font-size:.76rem; color:var(--text-mute); font-weight:700; letter-spacing:.08em; }
.verdict{ font-size:1.25rem; font-weight:800; margin-bottom:6px; }
.verdict.pass{ color:var(--ok); }
.verdict.fail{ color:var(--ng); }
.score-sub{ color:var(--text-sub); font-size:.92rem; }

.fieldbars{ display:flex; flex-direction:column; gap:14px; }
.fbar .top{ display:flex; align-items:baseline; gap:10px; margin-bottom:5px; font-size:.9rem; }
.fbar .top .name{ font-weight:700; }
.fbar .top .num{ margin-left:auto; font-size:.84rem; color:var(--text-sub); font-variant-numeric:tabular-nums; }
.fbar .track{ height:11px; background:var(--surface-2); border-radius:999px; overflow:hidden; }
.fbar .track i{ display:block; height:100%; border-radius:999px; transition:width .5s ease; }
.fbar.weak .top .name::after{
  content:"要対策"; margin-left:8px; font-size:.68rem; font-weight:800; letter-spacing:.06em;
  background:var(--ng-soft); color:var(--ng); padding:2px 8px; border-radius:999px;
}

.review-item{ border:1px solid var(--border); border-radius:var(--radius-sm); background:var(--surface); overflow:hidden; }
.review-item + .review-item{ margin-top:10px; }
.review-item > summary{
  padding:14px 16px; cursor:pointer; font-size:.92rem; font-weight:600; line-height:1.7;
  display:flex; gap:11px; align-items:flex-start; list-style:none;
}
.review-item > summary::-webkit-details-marker{ display:none; }
.review-item .mk{
  flex:0 0 auto; width:23px; height:23px; border-radius:50%; display:grid; place-items:center;
  font-size:.76rem; font-weight:800; color:#fff; margin-top:2px;
}
.review-item .mk.o{ background:var(--ok); }
.review-item .mk.x{ background:var(--ng); }
.review-body{ padding:0 16px 16px; border-top:1px solid var(--border); }
.review-body .ans{ font-size:.88rem; margin:14px 0 8px; }
.review-body .ans .lbl{ font-weight:800; color:var(--text-mute); font-size:.76rem; letter-spacing:.06em; display:block; }
.review-body .ans .you{ color:var(--ng); font-weight:700; }
.review-body .ans .cor{ color:var(--ok); font-weight:700; }
.review-body .exp{ font-size:.89rem; color:var(--text-sub); }

.filterbar{ display:flex; gap:8px; flex-wrap:wrap; margin-bottom:16px; }

/* ---------- 統計 ---------- */
.statgrid{ display:grid; grid-template-columns:repeat(4,1fr); gap:12px; }
@media (max-width:720px){ .statgrid{ grid-template-columns:repeat(2,1fr); } }
.stat{ background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-sm); padding:16px; text-align:center; }
.stat b{ display:block; font-size:1.5rem; font-weight:800; color:var(--primary); line-height:1.2; }
.stat span{ font-size:.75rem; color:var(--text-mute); font-weight:700; letter-spacing:.05em; }

/* ---------- FAQ ---------- */
.faq{ border-top:1px solid var(--border); }
.faq details{ border-bottom:1px solid var(--border); }
.faq summary{ padding:16px 34px 16px 0; cursor:pointer; font-weight:700; font-size:.96rem; position:relative; list-style:none; }
.faq summary::-webkit-details-marker{ display:none; }
.faq summary::after{ content:"＋"; position:absolute; right:6px; top:15px; color:var(--text-mute); font-weight:800; }
.faq details[open] summary::after{ content:"−"; }
.faq .a{ padding:0 0 18px; color:var(--text-sub); font-size:.92rem; }

/* ---------- フッター ---------- */
.site-footer{ background:var(--surface); border-top:1px solid var(--border); padding:36px 0 44px; margin-top:56px; }
.site-footer .cols{ display:flex; gap:32px; flex-wrap:wrap; justify-content:space-between; }
.site-footer h4{ font-size:.82rem; letter-spacing:.08em; color:var(--text-mute); margin-bottom:10px; }
.site-footer a{ color:var(--text-sub); font-size:.87rem; }
.site-footer ul{ list-style:none; padding:0; margin:0; }
.disclaimer{ margin-top:26px; padding-top:20px; border-top:1px solid var(--border); font-size:.76rem; color:var(--text-mute); line-height:1.9; }

/* ---------- ユーティリティ ---------- */
.mt-0{margin-top:0}.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mt-32{margin-top:32px}
.mb-0{margin-bottom:0}.mb-8{margin-bottom:8px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}
.center{ text-align:center; }
.muted{ color:var(--text-mute); font-size:.85rem; }
.row{ display:flex; gap:10px; flex-wrap:wrap; align-items:center; }
.hidden{ display:none !important; }
/* display を指定した要素にも hidden 属性を効かせる（YouTube導線の一括非表示で使用） */
[hidden]{ display:none !important; }
.sp-only{ display:none; }
@media (max-width:640px){ .sp-only{ display:initial; } }