/* STワンコイン模試 受験UI */
:root {
  --ink: #2b2620;         /* 濃いめのインク色（黒に近い茶系） */
  --paper: #faf6ec;       /* わら半紙のような紙色 */
  --bg: #f4f1ea;          /* サイト共通のベージュ基調 */
  --primary: #4f46e5;     /* STブランド indigo */
  --accent: #dc2626;      /* 提出・重要 */
  --warn-bg: #fef3c7;     /* 未回答 */
  --line: #d6d0c4;
  --flag: #f59e0b;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
}

/* ヘッダー */
.m-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; flex-wrap: nowrap; justify-content: space-between; align-items: center;
  background: #fff; border-bottom: 2px solid var(--primary);
  padding: 8px 16px; gap: 8px;
}
.m-header-left { display: flex; align-items: center; gap: 12px; min-width: 0; flex: 1 1 auto; }
.m-header-right { display: flex; align-items: center; gap: 12px; min-width: 0; flex: 0 0 auto; }
.m-brand { font-weight: bold; color: var(--primary); text-decoration: none; white-space: nowrap; }
/* 受験中はブランド名を隠してセッションchip・タイマー・中断ボタンを確実に収める（画面幅問わず） */
body.in-exam .m-brand { display: none; }
.m-session-chip { background: var(--primary); color: #fff; border-radius: 999px; padding: 2px 12px; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.m-timer { font-variant-numeric: tabular-nums; font-weight: bold; font-size: 20px; color: var(--ink); white-space: nowrap; flex: 0 0 auto; }
.m-timer.m-timer-low { color: var(--accent); }
.m-user { display: flex; align-items: center; gap: 8px; font-size: 13px; color: #6b7280; min-width: 0; }
.m-hdr-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 130px; color: var(--ink); font-weight: 600; }
.m-hdr-login { background: var(--primary); color: #fff; border: none; border-radius: 999px; padding: 7px 17px; font-size: 13px; font-weight: 700; cursor: pointer; font-family: inherit; white-space: nowrap; }
.m-hdr-login:hover { filter: brightness(1.08); }
.m-hdr-logout { background: none; border: 1px solid var(--line); color: #6b7280; border-radius: 999px; padding: 5px 12px; font-size: 12px; cursor: pointer; font-family: inherit; white-space: nowrap; }
.m-hdr-logout:hover { background: #f3f0e8; }

/* ブランド（このページが STカコモン であることを明示） */
.m-brand { display: flex; align-items: center; gap: 9px; }
.m-brand-logo { border-radius: 7px; flex: 0 0 auto; display: block; }
.m-brand-txt { display: flex; flex-direction: column; line-height: 1.12; }
.m-brand-txt b { color: var(--primary); font-size: 16px; }
.m-brand-txt small { color: #6b7280; font-size: 11px; font-weight: 600; }
.m-brand-sub { color: #9ca3af; font-weight: 600; margin-left: 5px; }
@media (max-width: 600px) { .m-brand-sub { display: block; margin-left: 0; margin-top: 1px; } }

/* 購入パネル（リード＋スペック表＋価格・CTA） */
.m-buy-lead { margin: 2px 0 16px; color: #4b5563; font-size: 14px; line-height: 1.75; }
.m-buy-lead b { color: var(--primary); }
.m-spec { margin: 0 0 18px; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #fff; }
.m-spec-row { display: flex; gap: 12px; padding: 11px 14px; font-size: 13.5px; }
.m-spec-row + .m-spec-row { border-top: 1px solid var(--line); }
.m-spec-row dt { flex: 0 0 92px; color: #6b7280; font-weight: 600; }
.m-spec-row dd { flex: 1 1 auto; margin: 0; color: var(--ink); font-weight: 600; }
.m-buy-cta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.m-price { display: flex; flex-direction: column; align-items: center; line-height: 1.05; flex: 0 0 auto; }
.m-price b { font-size: 32px; font-weight: 800; color: var(--ink); letter-spacing: -.01em; }
.m-price span { font-size: 11px; color: #6b7280; margin-top: 2px; }
.m-buy-cta .m-btn-block { flex: 1 1 200px; width: auto; margin: 0; }
.m-buy-note { margin: 11px 0 0; font-size: 12px; color: #9ca3af; }
@media (max-width: 480px) {
  .m-buy-cta { gap: 12px; }
  .m-price { flex-direction: row; align-items: baseline; gap: 7px; }
  .m-price b { font-size: 26px; }
}

/* お支払い説明（派手にせず、誠実・控えめに） */
.m-pay { margin-top: 14px; padding: 14px 16px; background: #fff; border: 1px solid var(--line); border-radius: 10px; }
.m-pay-head { margin: 0 0 8px; font-weight: 700; font-size: 14px; color: var(--ink); }
.m-pay-list { margin: 0; padding-left: 18px; font-size: 13px; color: #4b5563; line-height: 1.7; }
.m-pay-list li { margin: 5px 0; }
.m-pay-list b { color: var(--ink); }
.m-pay-foot { margin: 11px 0 0; font-size: 12px; color: #6b7280; }
.m-pay-foot a { color: #6b7280; }

/* 詳細（紹介LP）への導線バナー＝ロビー最上部。STカコモンの模試バナー配色（紺×金）を再現 */
.m-revisit {
  display: flex; align-items: center; gap: 12px;
  max-width: 760px; margin: 0 auto 18px; padding: 13px 16px;
  background: linear-gradient(135deg, #1B2433, #243042); border-radius: 12px;
  text-decoration: none; color: #fff;
  box-shadow: 0 4px 14px rgba(0,0,0,.22);
  transition: filter .15s ease;
}
.m-revisit:hover { filter: brightness(1.12); }
.m-revisit-ic { font-size: 22px; flex: 0 0 auto; line-height: 1; }
.m-revisit-txt { display: flex; flex-direction: column; line-height: 1.3; flex: 1 1 auto; min-width: 0; }
.m-revisit-txt b { color: #fff; font-size: 15px; }
.m-revisit-txt small { color: #cdd6e2; font-size: 12px; }
.m-revisit-cta { flex: 0 0 auto; background: #E2C77C; color: #1B2433; border-radius: 999px; padding: 6px 15px; font-size: 13px; font-weight: 800; white-space: nowrap; }
@media (max-width: 480px) {
  .m-revisit-txt small { display: none; }
  .m-revisit-cta { padding: 6px 12px; }
}

/* ロビー見出しの副題（〜申し込み・実施管理ページ〜） */
.m-lobby-sub { font-size: .56em; font-weight: 600; color: #6b7280; white-space: nowrap; }
@media (max-width: 560px) {
  .m-lobby-sub { display: block; margin-top: 4px; white-space: normal; }
}

/* 開催スケジュール（全3回） */
.m-rounds { max-width: 760px; margin: 18px auto 0; }
.m-rounds-h { font-size: 16px; color: var(--ink); margin: 0 0 12px; }
.m-round { display: flex; align-items: center; gap: 12px; padding: 13px 16px; border: 1px solid var(--line); border-radius: 10px; background: #fff; margin-bottom: 10px; text-decoration: none; color: inherit; }
a.m-round:hover { border-color: var(--primary); }
.m-round.is-current { border-color: var(--primary); box-shadow: inset 0 0 0 1px var(--primary); }
.m-round.locked { background: #f7f5ef; }
.m-round-main { display: flex; flex-direction: column; gap: 2px; flex: 1 1 auto; min-width: 0; }
.m-round-name { font-weight: 700; font-size: 14.5px; color: var(--ink); }
.m-round.locked .m-round-name { color: #6b6459; }
.m-round-dates { font-size: 12.5px; color: #6b7280; }
.m-round-badge { flex: 0 0 auto; font-size: 12px; font-weight: 700; border-radius: 999px; padding: 4px 12px; white-space: nowrap; }
.m-round-badge.open { background: #e7f6ed; color: #1a7f4b; border: 1px solid #b7e3c8; }
.m-round-badge.soon { background: #f0eee8; color: #8a8275; border: 1px solid #ddd7cb; }
.m-round-badge.closed { background: #f3f0ec; color: #9b8d7f; border: 1px solid #e0d9cd; }
.m-rounds-note { font-size: 12px; color: #9ca3af; margin: 4px 0 0; line-height: 1.7; }

/* 模試の説明セクション（紹介LPの内容を、派手にせず丁寧に） */
.m-about { max-width: 760px; margin: 30px auto 0; padding-top: 22px; border-top: 1px solid var(--line); }
.m-about-h { font-size: 18px; color: var(--ink); margin: 0 0 18px; }
.m-about-block { margin: 0 0 20px; }
.m-about-block h3 { font-size: 15px; color: var(--primary); margin: 0 0 7px; }
.m-about-block p { font-size: 13.5px; color: #4b5563; line-height: 1.85; margin: 0; }
.m-about-block ul { margin: 0; padding-left: 1.2em; }
.m-about-block li { font-size: 13.5px; color: #4b5563; line-height: 1.8; margin: 5px 0; }
.m-about-block b { color: var(--ink); }
.m-about-more { font-size: 13px; color: #6b7280; margin: 4px 0 0; }
.m-about-more a { color: var(--primary); font-weight: 600; }

/* 養成校・教員向け（クラス一括申込＝B2B導線） */
.m-school { max-width: 760px; margin: 26px auto 0; border: 1px solid var(--line); border-left: 4px solid var(--primary); border-radius: 10px; background: #fff; padding: 16px 18px; display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.m-school-body { flex: 1 1 280px; min-width: 0; }
.m-school-body h3 { font-size: 15px; color: var(--ink); margin: 0 0 6px; }
.m-school-body p { font-size: 13px; color: #4b5563; line-height: 1.8; margin: 0; }
.m-school-body b { color: var(--primary); }
.m-school-cta { flex: 0 0 auto; background: var(--primary); color: #fff; border-radius: 8px; padding: 11px 18px; font-size: 13.5px; font-weight: 700; text-decoration: none; white-space: nowrap; }
.m-school-cta:hover { filter: brightness(1.08); }
@media (max-width: 480px) { .m-school-cta { width: 100%; text-align: center; } }

/* ロビー下部フッター（運営の明示＝安心感） */
.m-lobby-foot { margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--line); text-align: center; font-size: 13px; }
.m-lobby-foot a { display: inline-block; margin: 4px 10px; color: var(--primary); font-weight: 600; text-decoration: none; }
.m-lobby-foot a:hover { text-decoration: underline; }
.m-foot-org { margin-top: 10px; font-size: 12px; color: #9ca3af; line-height: 1.6; }

/* 汎用 */
.m-btn {
  display: inline-block; border: none; border-radius: 8px; cursor: pointer;
  padding: 10px 20px; font-size: 15px; text-decoration: none; text-align: center;
  font-family: inherit;
}
.m-btn-primary { background: var(--primary); color: #fff; }
.m-btn-accent { background: var(--accent); color: #fff; }
.m-btn-ghost { background: #fff; color: var(--ink); border: 1px solid var(--line); }
#btn-pause { white-space: nowrap; flex: 0 0 auto; }
.m-btn-block { display: block; width: 100%; margin-top: 10px; }
.m-btn:disabled { opacity: .45; cursor: not-allowed; }
.m-card { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 20px; margin: 16px 0; }
.m-note { font-size: 13px; color: #6b7280; }
.m-err { color: var(--accent); font-size: 14px; }
.m-center { text-align: center; margin: 24px 0; }

/* ロビー */
.m-lobby { max-width: 760px; margin: 0 auto; padding: 24px 16px 60px; }
.m-lobby h1 { color: var(--primary); font-size: 26px; margin-bottom: 4px; }
.m-lead { color: #4b5563; }

/* 開発者からのひとこと */
.m-founder { max-width: 760px; margin: 18px auto; background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--primary); border-radius: 10px; padding: 16px 18px; }
.m-founder-lead { font-weight: 700; font-size: 13px; letter-spacing: .04em; color: var(--primary); margin: 0 0 8px; }
.m-founder p { font-size: 13.5px; line-height: 1.9; color: #4b5563; margin: 0; }
.m-founder-sign { margin-top: 10px; font-weight: 600; font-size: 12.5px; color: var(--ink); opacity: .8; }

/* ログイン中ユーザーの明示バー（スマホ・PC共通で大きく見せる） */
.m-whoami {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin: 14px 0 4px; padding: 11px 16px;
  background: #eef2ff; border: 1px solid #c7d2fe; border-radius: 10px;
  color: var(--ink); font-size: 15px;
}
.m-whoami-ic { font-size: 18px; line-height: 1; }
.m-whoami-txt { flex: 1 1 auto; min-width: 0; }
.m-whoami-txt b { color: var(--primary); font-size: 16px; }
.m-whoami-switch {
  flex: 0 0 auto; background: #fff; color: var(--primary);
  border: 1px solid #c7d2fe; border-radius: 999px;
  padding: 6px 14px; font-size: 13px; font-weight: 700; cursor: pointer;
  font-family: inherit;
}
.m-whoami-switch:hover { background: var(--primary); color: #fff; }

#login-panel input {
  display: block; width: 100%; padding: 10px; margin: 8px 0;
  border: 1px solid var(--line); border-radius: 8px; font-size: 15px;
}
.m-exam-title { font-size: 20px; }
.m-session-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.m-session-card h3 { margin: 0 0 8px; }
.m-session-status { min-height: 1.5em; font-size: 14px; color: #6b7280; }
.m-rules ul { margin: 8px 0 0; padding-left: 20px; }
.m-rules li { margin: 6px 0; }

/* 受験レイアウト（PC: 2ペイン） */
.m-exam-layout {
  display: grid; grid-template-columns: 1fr 360px; gap: 0;
  height: calc(100vh - 50px);
}
.m-booklet { overflow-y: auto; padding: 20px 28px 120px; background: var(--paper); }
/* 冊子の中身はワイド画面でも読みやすい幅に制限して中央寄せ */
.m-booklet-inner { max-width: 820px; margin: 0 auto; }
.m-sheet-wrap {
  overflow-y: auto; background: #faf8f3; border-left: 1px solid var(--line);
  padding: 12px 14px 80px;
}
.m-sheet-head {
  display: flex; justify-content: space-between; font-weight: bold;
  padding-bottom: 8px; border-bottom: 1px solid var(--line); margin-bottom: 8px;
}
#sheet-progress { font-weight: normal; color: #6b7280; font-size: 13px; }

/* 操作説明バナー（冊子上部・常設） */
.m-booklet-hint {
  background: #eef2ff; border: 1px solid #c7d2fe; border-radius: 10px;
  padding: 11px 14px; margin-bottom: 6px;
  font-size: 13.5px; line-height: 1.65; color: #3a3f55;
}
.m-booklet-hint b { color: var(--primary); }
.m-hint-link {
  background: none; border: none; padding: 0; margin-left: 2px;
  color: var(--primary); font-weight: 700; font-size: 13.5px; cursor: pointer;
  text-decoration: underline; font-family: inherit;
}

/* 問題冊子 */
.m-q { padding: 18px 0; border-bottom: 1px dashed var(--line); }
.m-q-head { display: flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.m-q-no { font-weight: bold; color: var(--primary); font-size: 17px; }
.m-q-flag {
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  cursor: pointer; font-size: 13px; padding: 4px 14px; color: #8a8170;
  transition: background .15s, color .15s, border-color .15s;
}
.m-q-flag:hover { border-color: var(--flag); color: var(--flag); }
.m-q-flag.on { background: var(--flag); border-color: var(--flag); color: #fff; }
.m-q-text { white-space: pre-wrap; font-size: 16px; color: var(--ink); }
.m-q-svg svg { max-width: 100%; height: auto; }

/* 問題直下のマーク欄（その場で鉛筆マークする） */
.m-q-marks {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin-top: 12px; padding: 10px 12px;
  background: #f3ecdb; border: 1px solid var(--line); border-radius: 10px;
}
.m-q-marks-label { font-size: 13px; color: #8a8170; margin-right: 2px; }
.m-q-marks.answered .m-q-marks-label { color: var(--ink); font-weight: bold; }
.m-mark {
  width: 42px; height: 42px; border-radius: 50%;
  border: 1.5px solid #b3a890; background: #fffdf7; cursor: pointer;
  font-size: 16px; color: #8a8170; font-weight: bold;
  display: flex; align-items: center; justify-content: center;
  padding: 0; font-family: inherit; flex: 0 0 auto;
  transition: border-color .12s, color .12s, box-shadow .12s;
}
.m-mark:hover { border-color: #6b5d44; color: #5c5340; }
/* 選択＝黒鉛筆でグリグリ塗りつぶした風 */
.m-mark.marked {
  color: #f7f3ea;
  border-color: #2a2620;
  border-width: 2px;
  background:
    radial-gradient(circle at 32% 30%, rgba(255,255,255,.12), transparent 42%),
    repeating-linear-gradient(48deg, #2a2620 0 2px, #423a2d 2px 4px);
  box-shadow: inset 0 0 6px rgba(0,0,0,.45);
}

/* マークシート */
.m-sheet { font-variant-numeric: tabular-nums; }
.m-row {
  display: grid; grid-template-columns: 44px repeat(5, 1fr) 26px;
  align-items: center; gap: 4px; padding: 3px 2px; border-radius: 6px;
}
.m-row.unanswered { background: var(--warn-bg); }
.m-row-no { font-size: 13px; text-align: right; padding-right: 6px; cursor: pointer; color: var(--primary); }
.m-row-no:hover { text-decoration: underline; }
.m-bubble {
  width: 26px; height: 26px; margin: 0 auto; border-radius: 50%;
  border: 1.5px solid #b3a890; background: #fffdf7; cursor: pointer;
  font-size: 12px; color: #a39880; display: flex; align-items: center; justify-content: center;
  padding: 0; font-family: inherit;
}
/* 黒鉛筆で塗った風 */
.m-bubble.marked {
  color: transparent; border-color: #2a2620;
  background: repeating-linear-gradient(48deg, #2a2620 0 2px, #423a2d 2px 4px);
  box-shadow: inset 0 0 4px rgba(0,0,0,.4);
}
.m-row-flag { font-size: 13px; text-align: center; color: var(--flag); }

/* 提出ボタン・モーダル */
.m-modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 100;
  display: flex; align-items: center; justify-content: center; padding: 16px;
}
.m-modal-box { background: #fff; border-radius: 12px; padding: 24px; max-width: 420px; width: 100%; }
.m-modal-btns { display: flex; gap: 12px; justify-content: flex-end; margin-top: 16px; }

/* 使い方ガイドモーダル */
.m-guide-box { max-width: 480px; max-height: 86vh; overflow-y: auto; }
.m-guide-box h3 { margin: 0 0 14px; color: var(--primary); }
.m-guide-list { margin: 0; padding-left: 22px; }
.m-guide-list li { margin: 0 0 14px; font-size: 14px; line-height: 1.7; }
.m-guide-list li b { color: var(--ink); }
.m-guide-list li b:first-child { color: var(--primary); }

/* スマホ: シートはスライドアップ */
.m-sheet-toggle {
  position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%);
  z-index: 60; background: var(--primary); color: #fff; border: none;
  border-radius: 999px; padding: 12px 28px; font-size: 15px; font-weight: bold;
  box-shadow: 0 4px 12px rgba(0,0,0,.25); cursor: pointer;
}
@media (max-width: 860px) {
  .m-exam-layout { display: block; height: auto; }
  .m-booklet { padding: 16px 16px 140px; min-height: 60vh; }
  .m-sheet-wrap {
    position: fixed; left: 0; right: 0; bottom: 0; top: auto; z-index: 70;
    height: 70vh; height: 70dvh; border-left: none; border-top: 2px solid var(--primary);
    border-radius: 16px 16px 0 0; transform: translateY(100%);
    transition: transform .25s ease; box-shadow: 0 -6px 24px rgba(0,0,0,.2);
  }
  .m-sheet-wrap.open { transform: translateY(0); }
  /* 開閉ボタンはシートより前面（シートを閉じる手段を確保） */
  .m-sheet-toggle { z-index: 80; }
  .m-btn-pause-label { display: none; }
  .m-header { padding: 8px 10px; }
  .m-header-left, .m-header-right { gap: 8px; }
  .m-timer { font-size: 17px; }
  #btn-pause { padding: 8px 12px; font-size: 13px; }
  .m-session-chip { max-width: 44vw; }
  .m-session-grid { grid-template-columns: 1fr; }
  /* 受験中だけ右上アカウントを隠してタイマー・中断ボタンの幅を確保（ロビーでは表示） */
  body.in-exam .m-user { display: none; }
}
@media print { body { display: none; } } /* 受験中の印刷は不可 */