:root{
  --navy:#1b2a4a; --navy2:#2c3f66; --gold:#e3a53a; --gold-l:#fbf1de;
  --ink:#1d2433; --mute:#667085; --line:#e4e7ec; --bg:#f6f7fb; --card:#fff;
  --ok:#1f8a5b; --ok-l:#e6f5ee; --warn:#c2410c; --warn-l:#fff1e8; --sel:#eaf0ff; --sel-b:#3b5bdb;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:'Be Vietnam Pro',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink);font-size:16px;line-height:1.55}
button{font-family:inherit;font-size:inherit;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:16px}
.hidden{display:none!important}

.top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 20px;background:var(--navy);color:#fff;position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:10px}
.logo{background:var(--gold);color:var(--navy);font-weight:700;border-radius:8px;padding:4px 8px;letter-spacing:.5px}
.brand-t{font-weight:600;display:flex;flex-direction:column;line-height:1.2}
.brand-t small{font-weight:400;opacity:.75;font-size:12px}
.exam-tag{font-size:14px;opacity:.9}

main{max-width:1100px;margin:0 auto;padding:24px 16px 80px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;margin-bottom:16px}
.narrow{max-width:520px;margin:40px auto}
h1{font-size:24px;margin:0 0 6px;color:var(--navy)}
h2{font-size:20px;margin:0 0 10px;color:var(--navy)}
h3{font-size:17px;margin:0 0 8px;color:var(--navy)}
.mute{color:var(--mute)}
.small{font-size:14px}
label.f{display:block;font-weight:500;margin:12px 0 4px}
.inp{width:100%;padding:11px 12px;border:1px solid #cfd4dc;border-radius:10px;background:#fff}
.inp:focus{outline:2px solid var(--sel-b);border-color:transparent}
.err{color:var(--warn);font-size:14px;margin-top:8px;min-height:20px}

.btn{border:0;border-radius:10px;padding:11px 18px;font-weight:600;background:var(--navy);color:#fff}
.btn:hover{background:var(--navy2)}
.btn.gold{background:var(--gold);color:var(--navy)}
.btn.ghost{background:#fff;color:var(--navy);border:1px solid #cfd4dc}
.btn.rec{background:#d92d20}
.btn:disabled{opacity:.45;cursor:not-allowed}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.spread{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}

/* home */
.skills{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}
.skill{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;display:flex;flex-direction:column;gap:8px}
.skill .ic{font-size:28px}
.skill .meta{font-size:14px;color:var(--mute)}
.badge{display:inline-block;font-size:13px;font-weight:600;border-radius:99px;padding:3px 10px;background:#f2f4f7;color:var(--mute)}
.badge.done{background:var(--ok-l);color:var(--ok)}
.badge.doing{background:var(--gold-l);color:#9a5b00}

/* exam */
.exam-bar{position:sticky;top:58px;z-index:15;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 14px;margin-bottom:14px;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.timer{font-variant-numeric:tabular-nums;font-weight:700;font-size:18px;color:var(--navy);background:var(--gold-l);border-radius:8px;padding:4px 10px}
.timer.low{background:var(--warn-l);color:var(--warn)}
.tabs{display:flex;gap:6px;flex-wrap:wrap}
.tab{border:1px solid #cfd4dc;background:#fff;border-radius:8px;padding:6px 12px;font-weight:600;color:var(--navy);font-size:14px}
.tab.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.tab.full::after{content:' ✓';color:var(--ok)}
.tab.on.full::after{color:#9be3bf}
.rubric{background:var(--gold-l);border-left:4px solid var(--gold);padding:10px 14px;border-radius:8px;margin-bottom:14px;font-weight:500}
.qno{display:inline-flex;align-items:center;justify-content:center;min-width:30px;height:30px;border-radius:8px;background:var(--navy);color:#fff;font-weight:700;font-size:14px;margin-right:8px;flex-shrink:0}
.q{margin-bottom:22px}
.q-head{display:flex;align-items:flex-start;gap:4px;margin-bottom:8px;font-weight:500}
.opts{display:flex;flex-direction:column;gap:8px}
.opt{display:flex;gap:10px;align-items:flex-start;text-align:left;width:100%;background:#fff;border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;color:var(--ink)}
.opt:hover{border-color:#aab6d3}
.opt.on{background:var(--sel);border-color:var(--sel-b)}
.opt .k{font-weight:700;color:var(--navy);min-width:20px}
.notice{white-space:pre-line;background:#fff;border:2px solid var(--navy);border-radius:10px;padding:14px;margin-bottom:10px;font-size:15px}
.notice .kind{font-size:12px;text-transform:uppercase;letter-spacing:.6px;color:var(--mute);margin-bottom:6px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}
.split .pane{max-height:calc(100vh - 190px);overflow:auto;padding-right:4px}
@media(max-width:820px){.split{grid-template-columns:1fr}.split .pane{max-height:none;overflow:visible}}
.text-box{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
.text-box p{margin:0 0 12px}
.club{border-bottom:1px solid var(--line);padding:10px 0}
.club:last-child{border:0}
.club b{color:var(--navy)}
.person{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:12px}
.choices{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.ch{width:40px;height:38px;border-radius:8px;border:1.5px solid #cfd4dc;background:#fff;font-weight:700;color:var(--navy)}
.ch.on{background:var(--sel-b);color:#fff;border-color:var(--sel-b)}
.ch.used{opacity:.5}
.gap{display:inline-block;min-width:36px;text-align:center;font-weight:700;background:var(--navy);color:#fff;border-radius:6px;padding:0 6px;margin:0 2px}
.gap.filled{background:var(--sel-b)}
.gap-inp{width:130px;padding:4px 8px;border:1.5px solid #9aa6bf;border-radius:6px;margin:0 3px;font-size:15px}
.cloze{line-height:2.1}
.mc-row{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.mc-row .opt{width:auto;padding:7px 12px}

/* listening */
.play{display:inline-flex;align-items:center;gap:8px}
.play .count{font-size:13px;color:var(--mute)}
.pics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.pic{background:#fff;border:2px solid var(--line);border-radius:12px;padding:8px;text-align:center;color:var(--ink)}
.pic.on{border-color:var(--sel-b);background:var(--sel)}
.pic .im{aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;font-size:52px;background:#f8f9fc;border-radius:8px;overflow:hidden}
.pic .im img{width:100%;height:100%;object-fit:contain;background:#fff}
.pic .lab{font-weight:700;color:var(--navy);margin-top:4px}
.notes-box{background:#fff;border:2px solid var(--navy);border-radius:12px;padding:16px}
.notes-box .ln{padding:8px 0;border-bottom:1px dashed var(--line);display:flex;align-items:center;flex-wrap:wrap;gap:6px}
.notes-box .ln:last-child{border:0}

/* writing */
.email{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;white-space:pre-line;position:relative}
.email .hd{font-size:14px;color:var(--mute);border-bottom:1px solid var(--line);padding-bottom:8px;margin-bottom:10px;white-space:normal}
.notes-list{margin:10px 0 0;padding:0;list-style:none}
.notes-list li{margin:6px 0;font-size:15px}
.notes-list li b{background:var(--gold);color:var(--navy);border-radius:6px;padding:1px 8px;margin-left:6px;font-size:14px}
textarea.wr{width:100%;min-height:260px;border:1.5px solid #cfd4dc;border-radius:12px;padding:14px;line-height:1.6;resize:vertical}
.wc{font-size:14px;color:var(--mute);text-align:right;margin-top:4px}
.task-pick{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:700px){.task-pick{grid-template-columns:1fr}}
.task-pick .opt{white-space:pre-line;flex-direction:column}

/* speaking */
.sp-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;margin-bottom:14px}
.sp-q{font-size:17px;font-weight:500;margin-bottom:10px}
.sp-img{background:#f8f9fc;border:1px dashed #c3cad8;border-radius:12px;min-height:200px;display:flex;align-items:center;justify-content:center;text-align:center;padding:12px;margin-bottom:12px;font-size:20px;color:var(--mute)}
.sp-img img{max-width:100%;max-height:420px;border-radius:8px}
.opt-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;width:100%}
.opt-grid div{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px;font-size:14px;color:var(--ink)}
.opt-grid span{display:block;font-size:40px}
.rec-state{font-size:14px;color:var(--mute)}
.rec-state.live{color:#d92d20;font-weight:600}
.rec-state.ok{color:var(--ok);font-weight:600}
audio{width:100%;margin-top:8px}

.modal{position:fixed;inset:0;background:rgba(15,23,42,.5);display:flex;align-items:center;justify-content:center;z-index:50;padding:16px}
.modal-box{background:#fff;border-radius:14px;max-width:440px;width:100%;padding:22px}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:16px}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--navy);color:#fff;padding:10px 16px;border-radius:10px;z-index:60;font-size:14px;max-width:90vw}
.foot-nav{display:flex;justify-content:space-between;gap:10px;margin-top:20px;flex-wrap:wrap}
.done-ic{font-size:54px}
@media(max-width:700px){.exam-bar{position:static}.top{position:static}}
.pic .cap{display:none}
.meter{height:8px;background:#eef1f6;border-radius:6px;margin-top:10px;overflow:hidden}.meter i{display:block;height:100%;width:0;background:#1f8a5b;transition:width .08s}