:root{
  /* Navy palette */
  --navy-900:#0d1a3a;
  --navy-800:#132449;
  --navy-700:#1b3163;
  --navy-600:#23407e;
  --brand:#17274f;         /* nền chủ đạo navy */
  --brand-soft:#20356b;
  --blue:#2f5bd0;          /* accent xanh dương */
  --blue-600:#2549b0;
  --blue-050:#eaf0fd;

  --bg:#eef1f8;
  --bg-2:#e7ecf6;
  --panel:#ffffff;
  --ink:#1b2338;
  --ink-2:#38415c;
  --muted:#6a7290;
  --line:#e4e9f3;
  --line-2:#d7deec;

  --ok:#0f7a54; --ok-bg:#e6f6ef;
  --bad:#c92a3b; --bad-bg:#fdecee;
  --warn:#b26a00; --flag:#e6a417;

  --shadow-sm:0 1px 2px rgba(16,28,60,.06),0 2px 6px rgba(16,28,60,.05);
  --shadow:0 2px 6px rgba(16,28,60,.06),0 12px 30px rgba(16,28,60,.08);
  --shadow-lg:0 10px 40px rgba(13,26,58,.18);
  --radius:16px;
  --radius-sm:11px;

  --font-ui:"Plus Jakarta Sans","Be Vietnam Pro","Segoe UI",system-ui,-apple-system,"Noto Sans JP","Yu Gothic",Meiryo,sans-serif;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:
    radial-gradient(1100px 460px at 50% -280px, rgba(47,91,208,.16), transparent 72%),
    radial-gradient(720px 380px at 100% 6%, rgba(14,122,84,.06), transparent 60%),
    radial-gradient(640px 360px at 0% 12%, rgba(230,164,23,.05), transparent 60%),
    linear-gradient(180deg,#eef2fb 0%,var(--bg) 40%,var(--bg-2) 100%);
  color:var(--ink);
  font-family:var(--font-ui);
  font-size:16px; line-height:1.7; letter-spacing:.1px;
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}

ruby rt{font-size:.56em;font-weight:400;color:#6b76a0;letter-spacing:0}
body.no-furigana ruby rt{visibility:hidden}

.ul{text-decoration:underline;text-decoration-color:var(--blue);text-underline-offset:3px;text-decoration-thickness:2px;font-weight:600}
.star{color:#e04b5a;font-weight:800;padding:0 .12em}
.blank-num{
  display:inline-block;min-width:2em;text-align:center;border:1.5px solid var(--navy-600);
  border-radius:7px;padding:0 .3em;font-weight:700;color:var(--navy-700);background:#eef3ff;margin:0 .14em;
}

/* ===== Top bar ===== */
.topbar{
  position:sticky;top:0;z-index:40;color:#fff;
  background:linear-gradient(135deg,var(--navy-800) 0%,var(--navy-700) 60%,var(--navy-600) 100%);
  box-shadow:0 2px 14px rgba(13,26,58,.28);
  border-bottom:3px solid var(--blue);
}
.topbar .wrap{max-width:1120px;margin:0 auto;display:flex;align-items:center;gap:16px;padding:12px 20px}
.brand{font-weight:800;letter-spacing:.4px;display:flex;align-items:center;gap:10px;font-size:1.05rem}
.brand .jp{display:flex;align-items:center;gap:8px;font-size:1.2rem;font-weight:800}
.brand .badge{background:var(--blue);color:#fff;border-radius:8px;font-size:.72rem;padding:2px 9px;font-weight:800;letter-spacing:.5px;box-shadow:0 2px 8px rgba(47,91,208,.5)}
.topbar .spacer{flex:1}
.topbar a{color:#cdd7f0}
.topbar .admin-link{display:inline-flex;align-items:center;gap:6px;color:#e6ecfb;text-decoration:none;font-size:.85rem;font-weight:600;border:1px solid rgba(205,215,240,.35);padding:6px 13px;border-radius:8px;transition:background .15s,border-color .15s}
.topbar .admin-link:hover{background:rgba(205,215,240,.14);border-color:rgba(205,215,240,.6)}
.brand .site-logo{width:38px;height:38px;border-radius:50%;flex:none;object-fit:cover;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.3)}

/* ===== Liên kết hệ thống LOD trên topbar (JFT · Irodori · Giáo Dục Định Hướng) ===== */
.topnav-ext{display:flex;align-items:center;gap:9px}
.btn-top{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;border-radius:10px;white-space:nowrap;
  font-size:.8rem;font-weight:800;text-decoration:none;color:#fff;
  border:1px solid rgba(255,255,255,.22);
  box-shadow:0 2px 8px rgba(0,0,0,.28);
  transition:transform .16s ease,box-shadow .16s ease,filter .16s;
}
.btn-top:hover{transform:translateY(-1px);filter:brightness(1.08);text-decoration:none;box-shadow:0 7px 18px rgba(0,0,0,.34)}
/* Nền màu ĐẬM, chữ tương phản cao — nổi rõ trên topbar navy (không còn nhợt như bản pastel) */
.btn-jlpt{background:linear-gradient(135deg,#e63946,#c1121f)}
.btn-jft{background:linear-gradient(135deg,#fbbf24,#f59e0b);color:#3d1f00}
.btn-lessons{background:linear-gradient(135deg,#0d9488,#0f766e)}
.btn-orientation{background:linear-gradient(135deg,#7c3aed,#6d28d9)}
.btn-top .ext-short{display:none}
@media(max-width:1150px){
  .btn-top .ext-full{display:none}
  .btn-top .ext-short{display:inline}
}
/* Mobile: KHÔNG ẩn 4 link nữa — cho xuống hàng 2, căn giữa, tự xuống dòng nếu hẹp */
@media(max-width:900px){
  .topbar .wrap{flex-wrap:wrap;row-gap:10px}
  .topbar .spacer{display:none}
  .topbar .brand{margin-right:auto}
  .topbar .brand > span:not(.jp){display:none} /* ẩn tagline "Học tập trực tuyến" cho hàng 1 gọn */
  .admin-link{order:2}
  .topnav-ext{display:flex;order:3;flex-basis:100%;justify-content:center;flex-wrap:wrap;gap:8px}
  .topnav-ext .btn-top{padding:6px 12px;font-size:.76rem}
}

/* ===== Footer bản quyền công ty (LOD) ===== */
.site-foot{max-width:1120px;margin:0 auto;padding:26px 20px 42px;display:flex;align-items:center;justify-content:center;gap:15px;flex-wrap:wrap;text-align:left;border-top:1px solid var(--line)}
.site-foot .foot-logo{width:48px;height:48px;border-radius:50%;flex:none;object-fit:cover;background:#fff;box-shadow:var(--shadow-sm)}
.site-foot .foot-txt{display:flex;flex-direction:column;gap:2px;font-size:.88rem;color:var(--ink-2)}
.site-foot .foot-brand{font-weight:800;color:var(--navy-800)}
.site-foot .foot-cr{color:var(--muted);font-size:.82rem}
@media(max-width:560px){.site-foot{padding:22px 16px 34px;text-align:center}.brand .site-logo{width:32px;height:32px}}
.timer{
  font-variant-numeric:tabular-nums;font-weight:800;font-size:1.12rem;letter-spacing:1px;
  background:rgba(255,255,255,.14);padding:7px 15px;border-radius:11px;display:flex;align-items:center;gap:8px;
  border:1px solid rgba(255,255,255,.14);
}
.timer.warning{background:#9c2230;border-color:#c0303f;animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.65}}
.timer.hidden{display:none}
.progress-mini{font-size:.86rem;color:#c9d3ee;font-weight:600}

/* ===== Layout ===== */
.container{max-width:1120px;margin:0 auto;padding:26px 20px 130px}
.section-head{
  background:var(--panel);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:20px 24px;margin-bottom:22px;position:relative;overflow:hidden;
  border:1px solid var(--line);
}
.section-head::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;
  background:linear-gradient(var(--navy-700),var(--blue))}
.section-head h1{margin:0 0 4px;font-size:1.4rem;font-weight:800;color:var(--navy-800);letter-spacing:-.2px}
.section-head .sub{color:var(--muted);font-size:.96rem;font-weight:500}
.section-head .meta{margin-top:12px;display:flex;gap:10px;flex-wrap:wrap;font-size:.86rem}
.section-head .meta span{background:var(--bg);border:1px solid var(--line);border-radius:9px;padding:5px 11px;color:var(--ink-2)}
.section-head .meta b{color:var(--navy-700)}
.section-head .meta a{font-weight:700}

.grid-main{display:grid;grid-template-columns:1fr 250px;gap:24px;align-items:start}
@media(max-width:920px){.grid-main{grid-template-columns:1fr}}

/* ===== Question groups ===== */
.qgroup{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);margin-bottom:22px;overflow:hidden}
.qgroup>.ghead{background:linear-gradient(180deg,#f6f8fd,#eef2fa);border-bottom:1px solid var(--line);padding:15px 22px}
.qgroup>.ghead .gt{font-weight:800;color:var(--navy-800);font-size:1.08rem;display:inline-flex;align-items:center;gap:9px}
.qgroup>.ghead .gt::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 4px var(--blue-050)}
.qgroup>.ghead .gi{color:var(--ink-2);font-size:.95rem;margin-top:6px;line-height:1.65}
.gbody{padding:6px 22px 16px}

.example{
  background:linear-gradient(180deg,#fbfcff,#f4f7fe);border:1px solid var(--line);border-radius:12px;
  padding:12px 16px;margin:14px 0;color:var(--ink-2);font-size:.95rem;
}
.example .tag{display:inline-block;background:var(--navy-700);color:#fff;border-radius:7px;padding:2px 10px;font-weight:700;font-size:.76rem;margin-right:10px}

.passage{
  background:#fffdf6;border:1px solid #ece3c9;border-radius:13px;
  padding:18px 20px;margin:16px 0;line-height:1.95;box-shadow:var(--shadow-sm);
}
.passage .ptitle{font-weight:700;color:var(--navy-700);margin-bottom:6px}
.figure{margin:16px 0;text-align:center}
.figure img{max-width:100%;border:1px solid var(--line-2);border-radius:12px;background:#fff;box-shadow:var(--shadow-sm)}
.figure .cap{color:var(--muted);font-size:.85rem;margin-top:8px}

.jtable{border-collapse:collapse;margin:14px auto;background:#fff;font-size:.92rem;border-radius:10px;overflow:hidden;box-shadow:var(--shadow-sm)}
.jtable caption{padding:6px}
.jtable th,.jtable td{border:1px solid #cfd6e6;padding:7px 13px;text-align:center}
.jtable th{background:#eef2fb;color:var(--navy-800);font-weight:700}

/* ===== Question ===== */
.question{padding:20px 2px;border-top:1px solid var(--line)}
.question:first-child{border-top:none}
.q-top{display:flex;gap:14px;align-items:flex-start}
.q-no{
  flex:0 0 auto;min-width:38px;height:38px;border-radius:11px;color:#fff;font-weight:800;font-size:.98rem;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--navy-700),var(--navy-600));box-shadow:0 3px 10px rgba(27,49,99,.28);
}
.q-stem{flex:1;line-height:2;font-size:1.06rem;color:var(--ink)}
.q-flag{
  flex:0 0 auto;border:1.5px solid var(--line-2);background:#fff;border-radius:10px;color:#aab2c6;
  cursor:pointer;padding:6px 10px;font-size:.9rem;transition:.15s;line-height:1;
}
.q-flag:hover{border-color:var(--flag);color:var(--warn);background:#fffaf0}
.q-flag.on{background:#fff4e0;border-color:var(--flag);color:var(--warn)}

.options{margin:14px 0 2px;display:grid;gap:10px}
.opt{
  display:flex;gap:12px;align-items:flex-start;border:1.6px solid var(--line-2);border-radius:12px;
  padding:12px 15px;cursor:pointer;background:#fff;transition:transform .08s ease,border-color .15s,background .15s,box-shadow .15s;position:relative;
}
.opt:hover{border-color:#a9b6dc;background:#f7f9ff}
.opt:active{transform:scale(.995)}
.opt input{position:absolute;opacity:0;width:0;height:0}
.opt .mark{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;border:2px solid #c1c9de;color:#59627d;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.86rem;background:#fff;transition:.15s;
}
.opt .otext{flex:1;line-height:1.8}
.opt.selected{border-color:var(--blue);background:var(--blue-050);box-shadow:0 0 0 1.5px var(--blue) inset}
.opt.selected .mark{background:var(--blue);border-color:var(--blue);color:#fff}

.reviewing .opt{cursor:default}
.reviewing .opt:hover{transform:none}
.opt.correct{border-color:var(--ok);background:var(--ok-bg);box-shadow:0 0 0 1.5px var(--ok) inset}
.opt.correct .mark{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.wrong{border-color:var(--bad);background:var(--bad-bg);box-shadow:0 0 0 1.5px var(--bad) inset}
.opt.wrong .mark{background:var(--bad);border-color:var(--bad);color:#fff}
.q-verdict{margin-top:10px;font-size:.92rem;font-weight:700;display:inline-block;padding:5px 12px;border-radius:9px}
.q-verdict.ok{color:var(--ok);background:var(--ok-bg)}
.q-verdict.no{color:var(--bad);background:var(--bad-bg)}

/* ===== Navigator ===== */
.nav-panel{position:sticky;top:82px}
.nav-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.nav-card h3{margin:0 0 12px;font-size:.98rem;color:var(--navy-800);font-weight:800}
.nav-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}
.nav-cell{
  aspect-ratio:1/1;border:1.5px solid var(--line-2);border-radius:9px;background:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;
  cursor:pointer;color:#5a627d;transition:.12s;position:relative;
}
.nav-cell:hover{border-color:var(--blue);color:var(--blue)}
.nav-cell.answered{background:var(--blue);border-color:var(--blue);color:#fff}
.nav-cell.flagged::after{content:"";position:absolute;top:3px;right:3px;width:7px;height:7px;border-radius:50%;background:var(--flag)}
.nav-cell.current{outline:3px solid #ffd27a;outline-offset:1px}
.nav-cell.rc-ok{background:var(--ok-bg);border-color:var(--ok);color:var(--ok)}
.nav-cell.rc-no{background:var(--bad-bg);border-color:var(--bad);color:var(--bad)}
.nav-legend{margin-top:14px;font-size:.8rem;color:var(--muted);display:grid;gap:6px}
.nav-legend span{display:inline-flex;align-items:center;gap:8px}
.dot{width:13px;height:13px;border-radius:4px;border:1.5px solid var(--line-2);display:inline-block}
.dot.a{background:var(--blue);border-color:var(--blue)}
.dot.f{background:#fff}.dot.f::after{content:"";display:block;width:6px;height:6px;border-radius:50%;background:var(--flag);margin:2px auto}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:12px;
  padding:13px 20px;font-weight:700;font-size:1rem;cursor:pointer;font-family:inherit;transition:.15s;line-height:1.1;
}
.btn-primary{background:linear-gradient(140deg,var(--navy-700),var(--navy-600));color:#fff;box-shadow:0 6px 18px rgba(27,49,99,.28)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(27,49,99,.34)}
.btn-ghost{background:#fff;color:var(--navy-700);border:1.6px solid var(--line-2)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.nav-actions{margin-top:16px;display:grid;gap:10px}

.nav-fab{
  display:none;position:fixed;right:18px;bottom:18px;z-index:45;
  background:linear-gradient(140deg,var(--navy-700),var(--navy-600));color:#fff;border:none;border-radius:50px;
  padding:14px 22px;font-weight:800;box-shadow:var(--shadow-lg);cursor:pointer;font-family:inherit;
}
@media(max-width:920px){
  .nav-panel{position:fixed;inset:0;z-index:60;background:rgba(13,20,40,.55);display:none;padding:20px}
  .nav-panel.open{display:block}
  .nav-panel .nav-card{max-width:440px;margin:44px auto;max-height:80vh;overflow:auto}
  .nav-fab{display:inline-flex}
}
/* nút nổi phụ: nhảy nhanh sang phần sau / nộp bài (đặt trên nút "Câu hỏi", chỉ hiện ở mobile) */
.next-fab{bottom:80px;background:linear-gradient(140deg,var(--blue),var(--blue-600))}

/* ===== Modals ===== */
.overlay{position:fixed;inset:0;z-index:80;background:rgba(11,18,38,.6);backdrop-filter:blur(3px);display:flex;align-items:center;justify-content:center;padding:20px}
.overlay.hidden{display:none}
.modal{background:#fff;border-radius:20px;max-width:580px;width:100%;padding:28px 28px 24px;box-shadow:var(--shadow-lg);max-height:90vh;overflow:auto}
.modal h2{margin:0 0 6px;color:var(--navy-800);font-size:1.5rem;font-weight:800}
.modal .lead{color:var(--muted);margin:0 0 20px;font-weight:500}
.mode-opts{display:grid;gap:12px;margin-bottom:20px}
.mode-opt{border:1.6px solid var(--line-2);border-radius:13px;padding:15px 17px;cursor:pointer;transition:.13s}
.mode-opt:hover{border-color:var(--blue);background:#f7f9ff}
.mode-opt.sel{border-color:var(--blue);background:var(--blue-050);box-shadow:0 0 0 1.5px var(--blue) inset}
.mode-opt b{display:block;font-size:1.04rem;color:var(--navy-800)}
.mode-opt small{color:var(--muted)}

.result-score{display:flex;gap:22px;align-items:center;flex-wrap:wrap;margin:8px 0 18px}
.score-ring{
  --p:0;width:124px;height:124px;border-radius:50%;flex:0 0 auto;
  background:conic-gradient(var(--blue) calc(var(--p)*1%),#e6ebf6 0);
  display:flex;align-items:center;justify-content:center;position:relative;box-shadow:var(--shadow-sm);
}
.score-ring::before{content:"";position:absolute;inset:12px;background:#fff;border-radius:50%}
.score-ring .val{position:relative;font-weight:800;font-size:1.6rem;color:var(--navy-800)}
.score-meta{flex:1;min-width:190px}
.score-meta .big{font-size:1.55rem;font-weight:800;color:var(--navy-800)}
.score-meta .pill{display:inline-block;padding:4px 14px;border-radius:20px;font-weight:800;font-size:.85rem;margin-top:8px}
.pill.pass{background:var(--ok-bg);color:var(--ok)}
.pill.fail{background:var(--bad-bg);color:var(--bad)}
.result-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}
@media(max-width:520px){.result-actions{grid-template-columns:1fr}}
.note{font-size:.82rem;color:var(--muted);margin-top:16px;line-height:1.6}

/* ===== Home ===== */
.home-hero{
  position:relative;overflow:hidden;color:#fff;isolation:isolate;
  border-radius:24px;padding:42px 38px;margin-bottom:30px;
  background:
    radial-gradient(130% 150% at 88% -30%, rgba(64,110,230,.55), transparent 55%),
    radial-gradient(80% 130% at -5% 120%, rgba(14,122,84,.22), transparent 60%),
    linear-gradient(135deg,#0e1f45 0%,#17274f 48%,#233c7d 100%);
  box-shadow:0 20px 55px rgba(13,26,58,.36), inset 0 1px 0 rgba(255,255,255,.09);
  border:1px solid rgba(255,255,255,.09);
}
/* Quầng sáng xanh trôi ở góc trên phải cho hero có chiều sâu */
.home-hero::before{
  content:"";position:absolute;z-index:-1;right:-90px;top:-120px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(90,140,255,.45),transparent 68%);filter:blur(6px);pointer-events:none;
}
/* Chữ Nhật mờ trang trí (nét văn hoá, tinh tế) */
.home-hero::after{
  content:"合格";position:absolute;z-index:-1;right:26px;top:8px;line-height:1;pointer-events:none;
  font-family:"Noto Sans JP",sans-serif;font-size:6.4rem;font-weight:800;letter-spacing:4px;
  color:rgba(255,255,255,.055);text-shadow:0 2px 30px rgba(0,0,0,.2);
}
.hero-eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:.72rem;font-weight:800;letter-spacing:2.4px;text-transform:uppercase;color:#a9c1ff;margin-bottom:14px}
.hero-eyebrow::before{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,#2f5bd0,#8fb0ff)}
.home-hero h1{margin:0 0 10px;font-size:2.2rem;font-weight:800;letter-spacing:-.6px;line-height:1.14;text-shadow:0 2px 18px rgba(0,0,0,.18)}
.home-hero p{color:#ccd8f2;margin:0;max-width:640px;line-height:1.72;font-size:1.02rem}
.hero-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-pill{
  display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;
  font-size:.83rem;font-weight:600;color:#eaf0ff;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12);transition:background .16s,transform .16s;
}
.hero-pill:hover{background:rgba(255,255,255,.16);transform:translateY(-1px)}
.hero-pill .hp-ic{font-size:.98rem;line-height:1}
@media(max-width:560px){
  .home-hero{padding:30px 22px;border-radius:20px}
  .home-hero h1{font-size:1.7rem}
  .home-hero::after{font-size:4.4rem;top:14px}
}
.exam-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.exam-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:0 1px 2px rgba(16,28,60,.05),0 10px 26px rgba(16,28,60,.07);padding:22px;position:relative;overflow:hidden;transition:transform .18s ease,box-shadow .18s ease,border-color .18s}
.exam-card::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:linear-gradient(90deg,var(--navy-700),var(--blue));opacity:.85;transition:height .18s,opacity .18s}
.exam-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(16,28,60,.14);border-color:var(--line-2)}
.exam-card:hover::before{height:5px;opacity:1}
.exam-card h2{margin:6px 0 2px;font-size:1.35rem;font-weight:800;color:var(--navy-800)}
.exam-card .d{color:var(--muted);font-size:.83rem;margin-bottom:16px;font-weight:500}
.sec-link{display:flex;align-items:center;justify-content:space-between;gap:12px;border:1.5px solid var(--line);border-radius:12px;padding:13px 15px;margin-bottom:11px;transition:.14s;color:var(--ink)}
.sec-link:hover{border-color:var(--blue);background:#f7f9ff;text-decoration:none;transform:translateX(2px)}
.sec-link .n{font-weight:700;color:var(--navy-800)}
.sec-link .m{color:var(--muted);font-size:.8rem;margin-top:2px}
.sec-link.disabled{opacity:.6;pointer-events:none}
.sec-link .go{color:#fff;font-weight:800;font-size:.85rem;background:var(--blue);padding:8px 14px;border-radius:9px;white-space:nowrap;box-shadow:0 3px 10px rgba(47,91,208,.35)}
.sec-tag{font-size:.72rem;background:#eef2fb;color:var(--navy-700);border-radius:7px;padding:3px 9px;font-weight:700}
.soon{background:#fff4e0;color:var(--warn)}

footer.foot{max-width:1120px;margin:0 auto;padding:22px 20px;color:var(--muted);font-size:.85rem}

/* ===== Thi cả đề (full exam) ===== */
.stepbar{display:flex;align-items:center;gap:12px;margin-top:14px;flex-wrap:wrap}
.step{flex:1;min-width:190px;border:1.6px solid var(--line-2);border-radius:12px;padding:10px 14px;font-size:.85rem;color:var(--muted);background:#fff;transition:.15s}
.step b{display:block;color:var(--navy-800);font-size:.92rem;margin-bottom:1px}
.step.active{border-color:var(--blue);background:var(--blue-050);color:var(--ink-2);box-shadow:0 0 0 1.5px var(--blue) inset}
.step.done{border-color:var(--ok);background:var(--ok-bg);color:var(--ok)}
.step-arrow{color:var(--muted);font-weight:800;font-size:1.1rem}
@media(max-width:560px){.step-arrow{display:none}}
.stage-banner{background:linear-gradient(135deg,var(--navy-700),var(--navy-600));color:#fff;border-radius:13px;padding:13px 18px;font-weight:700;margin-bottom:18px;box-shadow:var(--shadow-sm);letter-spacing:.2px}

.sec-link.full{border:none;background:linear-gradient(135deg,var(--navy-700),var(--blue-600));color:#fff;margin-top:4px;box-shadow:0 6px 18px rgba(37,73,176,.28)}
.sec-link.full:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,73,176,.4);text-decoration:none}
.sec-link.full .n{color:#fff}
.sec-link.full .m{color:#cdd7f0}
.sec-link.full .go{background:#fff;color:var(--navy-700)}
.sec-link.full.only{margin-top:0}
.step.done{border-color:var(--ok);background:var(--ok-bg)}

/* ---- Trang chủ: chip các phần trong đề ---- */
.part-chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}
.chip{font-size:.76rem;font-weight:600;color:var(--navy-700);background:#eef2fb;border:1px solid var(--line);border-radius:8px;padding:4px 10px}
.chip.soon{color:var(--muted);background:#f4f5f8;border-style:dashed}

/* ---- Trang chủ: tiêu đề khu vực + danh sách đề đào tạo đang mở ---- */
.home-sec{display:flex;align-items:center;gap:12px 14px;flex-wrap:wrap;margin:34px 2px 15px}
.home-sec h2{margin:0;font-size:1.3rem;font-weight:800;color:var(--navy-800);display:flex;align-items:center;gap:9px;letter-spacing:-.2px}
.home-sec .hs-ic{flex:none;font-size:1.05rem;line-height:1;width:36px;height:36px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--blue-050),#dbe6ff);box-shadow:inset 0 0 0 1px rgba(47,91,208,.16)}
.home-sec-count{font-size:.8rem;font-weight:700;color:var(--navy-700);background:#eef2fb;border:1px solid var(--line);border-radius:999px;padding:4px 12px;white-space:nowrap}
.home-sec-spacer{flex:1 1 auto}
.home-sec-hint{font-size:.86rem;font-weight:600;color:#9a3412;background:#fff7ed;border:1px solid #fed7aa;border-radius:999px;padding:5px 13px;white-space:nowrap}
.home-sec-topics{margin-bottom:6px}
/* Thanh tìm kiếm dạng "viên thuốc" hiện đại: ô + nút Tìm liền một khối bo tròn */
.train-search-form{display:inline-flex;width:min(360px,100%)}
.train-search-wrap{display:inline-flex;align-items:center;gap:9px;width:100%;background:var(--panel);border:1.5px solid var(--line-2);border-radius:999px;padding:5px 6px 5px 16px;box-shadow:0 1px 2px rgba(16,28,60,.05),0 4px 14px rgba(16,28,60,.06);transition:border-color .16s,box-shadow .16s}
.train-search-wrap:hover{border-color:#c4cee3}
.train-search-wrap:focus-within{border-color:var(--blue);box-shadow:0 0 0 4px rgba(47,91,208,.15)}
.train-search-wrap .tsw-ic{font-size:1rem;opacity:.55;line-height:1;flex:none}
.train-search{flex:1 1 auto;border:0;outline:0;background:transparent;font:inherit;font-size:.95rem;color:var(--ink);min-width:60px;padding:7px 0}
.train-search::placeholder{color:#9aa3bd}
.train-search::-webkit-search-cancel-button{-webkit-appearance:none;appearance:none}
.train-search-clear{flex:none;display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;background:var(--bg);color:var(--muted);font-size:.78rem;font-weight:700;text-decoration:none;transition:.14s}
.train-search-clear:hover{background:var(--bad-bg);color:var(--bad);text-decoration:none}
.train-search-btn{flex:none;border:0;background:linear-gradient(135deg,var(--blue),var(--blue-600));color:#fff;font:inherit;font-weight:700;font-size:.9rem;padding:10px 20px;border-radius:999px;cursor:pointer;box-shadow:0 3px 10px rgba(47,91,208,.35);transition:filter .14s,transform .14s,box-shadow .14s;letter-spacing:.02em}
.train-search-btn:hover{filter:brightness(1.07);transform:translateY(-1px);box-shadow:0 5px 15px rgba(47,91,208,.45)}
.train-search-btn:active{transform:translateY(0);box-shadow:0 2px 8px rgba(47,91,208,.35)}
.train-hint{margin:0 2px 16px;color:var(--muted);font-size:.88rem}
.train-noresult{text-align:center;color:var(--muted);padding:26px 0;font-weight:600}
/* ===== Chủ đề dạng THU GỌN (details/summary) trên trang chủ ===== */
.topic-block{position:relative;border:1px solid var(--line);border-radius:18px;background:var(--panel);box-shadow:0 1px 2px rgba(16,28,60,.05),0 8px 22px rgba(16,28,60,.06);margin:16px 0 0;overflow:hidden;scroll-margin-top:80px;transition:box-shadow .18s,transform .18s,border-color .18s}
.topic-block::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:linear-gradient(180deg,var(--navy-700),var(--blue));opacity:.9;z-index:1}
.topic-block:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(16,28,60,.12);border-color:var(--line-2)}
.topic-block:first-of-type{margin-top:6px}
.topic-summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:17px 20px 17px 24px;user-select:none;-webkit-user-select:none;transition:background .15s}
.topic-summary::-webkit-details-marker{display:none}
.topic-summary::marker{content:""}
.topic-summary:hover{background:#f6f9ff}
.topic-summary-main{display:flex;align-items:center;gap:13px;flex-wrap:wrap;min-width:0}
.topic-summary .hs-ic{flex:none;font-size:1.3rem;line-height:1;width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eaf0fd,#dbe6ff);box-shadow:inset 0 0 0 1px rgba(47,91,208,.16),0 3px 9px rgba(47,91,208,.12)}
.topic-summary .topic-name{font-size:1.2rem;font-weight:800;color:var(--navy-800);letter-spacing:-.2px}
.topic-summary .home-sec-count{flex:none}
/* Nút gợi ý mở/đóng — hiện RÕ là bấm được: chữ "Xem danh sách" + mũi tên */
.topic-cta{flex:none;display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 15px;border-radius:999px;background:linear-gradient(135deg,var(--blue),var(--blue-600));color:#fff;font-size:.9rem;font-weight:800;letter-spacing:-.1px;border:1px solid transparent;box-shadow:0 3px 10px rgba(47,91,208,.3);transition:filter .15s,box-shadow .15s,transform .15s,background .15s,color .15s;white-space:nowrap}
.topic-summary:hover .topic-cta{filter:brightness(1.06);box-shadow:0 5px 16px rgba(47,91,208,.42);transform:translateY(-1px)}
.topic-cta .topic-chevron{font-size:.8rem;line-height:1;transition:transform .22s ease}
.topic-cta .topic-cta-close{display:none}
.topic-block[open] .topic-cta{background:#fff;color:var(--blue);border-color:var(--line-2);box-shadow:none}
.topic-block[open] .topic-summary:hover .topic-cta{background:#f0f5ff;filter:none;transform:none;box-shadow:none}
.topic-block[open] .topic-cta .topic-cta-open{display:none}
.topic-block[open] .topic-cta .topic-cta-close{display:inline}
.topic-block[open] .topic-chevron{transform:rotate(180deg)}
.topic-block[open] .topic-summary{background:#f6f9ff;border-bottom:1px solid var(--line)}
.topic-body{padding:20px 22px 24px}
.topic-body .topic-desc{margin:0 0 15px}
.topic-body .exam-grid{margin:0}
/* Mô tả ngắn dưới tên chủ đề */
.topic-desc{color:var(--muted);font-size:.9rem;line-height:1.6;max-width:820px}
/* Thanh phân trang đề đào tạo */
.pager{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:7px;margin:28px 0 4px}
.pager .pg{min-width:40px;height:40px;padding:0 13px;display:inline-flex;align-items:center;justify-content:center;border:1.5px solid var(--line-2);border-radius:11px;background:var(--panel);color:var(--navy-700);font-weight:700;font-size:.94rem;text-decoration:none;box-shadow:var(--shadow-sm);transition:.15s}
.pager a.pg:hover{border-color:var(--blue);background:var(--blue-050);color:var(--blue-600);text-decoration:none;transform:translateY(-2px);box-shadow:0 5px 14px rgba(47,91,208,.22)}
.pager .pg.pg-cur{background:linear-gradient(135deg,var(--blue),var(--blue-600));border-color:transparent;color:#fff;box-shadow:0 4px 13px rgba(47,91,208,.42)}
.pager .pg.pg-nav{padding:0 15px}
.pager .pg.disabled{opacity:.4;pointer-events:none;box-shadow:none}
.pager .pg-ellipsis{color:var(--muted);padding:0 3px;font-weight:700;align-self:flex-end}
.pager .pg-info{margin-left:10px;color:var(--muted);font-size:.86rem;font-weight:600;white-space:nowrap}
@media(max-width:560px){
  .home-sec{margin-top:26px}
  .home-sec-spacer{display:none}
  .train-search-form{width:100%}
  .pager{gap:6px}
  .pager .pg{min-width:38px;height:38px;padding:0 10px}
  .pager .pg-info{width:100%;text-align:center;margin:6px 0 0}
}

/* ---- Phần Nghe: hộp audio tự phát, chỉ-đọc (không tua, không tạm dừng) ---- */
.audio-box{background:#fff;border:1.5px solid var(--line-2);border-radius:14px;padding:16px 18px;margin:0 0 20px;box-shadow:var(--shadow-sm)}
.audio-label{font-size:.92rem;color:var(--ink-2);margin-bottom:12px;line-height:1.55}
/* thẻ <audio> gốc bị ẩn hoàn toàn — chặn mọi thao tác tua/tạm dừng của người thi */
.listen-audio{display:none !important}
.audio-player{display:flex;align-items:center;gap:12px;background:var(--blue-050);border:1px solid var(--line-2);border-radius:12px;padding:10px 14px;user-select:none}
.audio-ico{font-size:1.15rem;line-height:1;flex:none}
.audio-bar{flex:1 1 auto;height:8px;border-radius:6px;background:#d3ddf3;overflow:hidden}
.audio-bar>i{display:block;height:100%;width:0;border-radius:6px;background:linear-gradient(90deg,var(--blue),var(--blue-600));transition:width .25s linear}
.audio-time{flex:none;font-size:.85rem;color:var(--ink-2);font-variant-numeric:tabular-nums;min-width:82px;text-align:right}
.audio-state{flex:none;font-size:.85rem;font-weight:600;color:var(--blue-600);min-width:110px;text-align:right}
.audio-startbtn{font:inherit;font-size:.82rem;font-weight:700;color:#fff;background:var(--blue);border:0;border-radius:8px;padding:6px 12px;cursor:pointer}
.audio-startbtn:hover{background:var(--blue-600)}
@media(max-width:560px){
  .audio-player{flex-wrap:wrap}
  .audio-bar{order:5;flex-basis:100%}
  .audio-time,.audio-state{min-width:0}
}

/* ảnh minh hoạ đầu nhóm (ví dụ 例) nhỏ hơn ảnh câu hỏi */
.figure.gfig{margin:6px 0 14px}
.figure.gfig img{max-width:340px}

/* verdict cho câu chưa có đáp án */
.q-verdict.skip{color:var(--muted);background:#f4f5f8;border:1px dashed var(--line-2)}
.jtable .muted,.muted{color:var(--muted);font-weight:500;font-size:.85em}

/* ===== Bảng vinh danh (trang chủ) ===== */
.honor-board{background:var(--panel);border:1px solid var(--line);border-radius:20px;box-shadow:0 1px 2px rgba(16,28,60,.05),0 12px 30px rgba(16,28,60,.08);overflow:hidden;margin-bottom:26px}
.honor-board-head{display:flex;align-items:center;gap:14px;padding:17px 22px;background:linear-gradient(135deg,#fffbeb,#fef3c7 55%,#fde68a);border-bottom:1px solid #fce9b0}
.honor-board-ic{flex:none;font-size:1.5rem;line-height:1;width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#fde68a,#f7b733);box-shadow:0 4px 12px rgba(217,119,6,.32),inset 0 1px 0 rgba(255,255,255,.5)}
.honor-board-heading h2{margin:0;font-size:1.15rem;font-weight:800;color:#7c2d12}
.honor-board-heading p{margin:3px 0 0;font-size:.78rem;font-weight:600;color:#92400e}
.honor-list{list-style:none;margin:0;padding:6px}
.honor-row{display:flex;align-items:center;gap:13px;padding:11px 12px;border-radius:12px;transition:background .15s ease}
.honor-row+.honor-row{border-top:1px solid var(--line)}
.honor-row:hover{background:#f7f9ff}
.honor-row.is-first{background:linear-gradient(135deg,#fffdf5,#fefce8)}
.honor-rank{flex:0 0 30px;text-align:center;font-size:1.2rem;line-height:1}
.honor-rank[data-rank="4"],.honor-rank[data-rank="5"]{font-size:.95rem;font-weight:800;color:#9aa3bd}
.honor-avatar{position:relative;overflow:hidden;flex:0 0 56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.1rem;color:#fff;background:linear-gradient(135deg,var(--navy-700),var(--blue));box-shadow:0 3px 10px rgba(23,39,79,.3),0 0 0 3px #fff}
.honor-row.is-first .honor-avatar{background:linear-gradient(135deg,#d97706,#f59e0b);box-shadow:0 3px 10px rgba(217,119,6,.4);border:2px solid #fbbf24}
.honor-ini{position:relative;z-index:1;pointer-events:none}
.honor-photo{position:absolute;inset:0;z-index:2;width:100%;height:100%;object-fit:cover;background:#e2e8f0}
.honor-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.honor-name{font-weight:700;font-size:.95rem;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.honor-meta{display:flex;flex-wrap:wrap;gap:4px 12px;font-size:.78rem;color:var(--muted)}
.honor-meta span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
.honor-score{flex:0 0 auto;text-align:right;line-height:1.15}
.hs-pct{display:block;font-size:1.2rem;font-weight:800;color:var(--ok)}
.hs-detail{font-size:.72rem;font-weight:600;color:var(--muted)}
/* Bảng "Học sinh chăm chỉ nhất hôm nay" — tông CAM để phân biệt với bảng vinh danh (tông vàng) */
.honor-board-diligent .honor-board-head{background:linear-gradient(135deg,#fff7ed,#ffedd5 60%,#fed7aa);border-bottom:1px solid #fdba74}
.honor-board-diligent .honor-board-heading h2{color:#9a3412}
.honor-board-diligent .honor-board-heading p{color:#c2410c}
.honor-board-diligent .honor-board-ic{background:linear-gradient(135deg,#fed7aa,#fb923c);box-shadow:0 4px 12px rgba(234,88,12,.3),inset 0 1px 0 rgba(255,255,255,.5)}
@media(max-width:640px){
  .honor-board-head{padding:13px 15px}
  .honor-avatar{flex:0 0 46px;height:46px;font-size:.95rem}
  .honor-exam{display:none}
  .honor-name{font-size:.9rem}
  .hs-pct{font-size:1.05rem}
}