:root {
  --bg:         #f0f2f8;
  --surface:    #ffffff;
  --surface2:   #f5f6fb;
  --border:     #e4e7f0;
  --border2:    #d0d5e8;
  --text:       #1a1d2e;
  --muted:      #8890aa;
  --blue:       #4f63d2;
  --blue-dark:  #3a4fb8;
  --blue-glow:  rgba(79,99,210,.15);
  --blue-soft:  rgba(79,99,210,.08);
  --green:      #16a34a;
  --green-soft: rgba(22,163,74,.09);
  --amber:      #d97706;
  --amber-soft: rgba(217,119,6,.09);
  --rose:       #e11d48;
  --rose-soft:  rgba(225,29,72,.09);
  --purple:     #7c3aed;
  --purple-soft:rgba(124,58,237,.09);
  --cyan:       #0891b2;
  --cyan-soft:  rgba(8,145,178,.09);
  --sidebar-w:  240px;
  --radius:     14px;
  --radius-sm:  9px;
  --shadow:     0 1px 4px rgba(26,29,46,.06), 0 4px 16px rgba(79,99,210,.07);
  --shadow-sm:  0 1px 3px rgba(26,29,46,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Plus Jakarta Sans',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;display:flex;overflow-x:hidden}

/* ── SIDEBAR ── */
#sidebar{
  width:var(--sidebar-w);min-height:100vh;
  background:var(--surface);
  border-right:1px solid var(--border);
  display:flex;flex-direction:column;
  position:fixed;top:0;left:0;bottom:0;z-index:1000;
  transition:transform .3s cubic-bezier(.4,0,.2,1);
  overflow-y:auto;overflow-x:hidden;
  box-shadow:2px 0 12px rgba(79,99,210,.06);
}
.sidebar-logo{padding:22px 18px 18px;border-bottom:1px solid var(--border);}
.brand{font-size:1.3rem;font-weight:800;color:var(--text);display:flex;align-items:center;gap:10px;letter-spacing:-.5px}
.brand-icon{width:34px;height:34px;background:var(--blue);border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:.95rem;color:#fff;box-shadow:0 2px 8px rgba(79,99,210,.4)}
.brand span{color:var(--blue)}
.tagline{font-size:.7rem;color:var(--muted);margin-top:3px;padding-left:44px}
.nav-section{padding:14px 10px 6px}
.nav-label{font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:1.2px;color:var(--muted);padding:0 10px;margin-bottom:5px}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--radius-sm);cursor:pointer;color:var(--muted);font-size:.83rem;font-weight:600;transition:all .18s;margin-bottom:1px;position:relative;text-decoration:none;border:none;background:none;width:100%;text-align:left}
.nav-item i{width:18px;text-align:center;font-size:.9rem}
.nav-item:hover{color:var(--text);background:var(--surface2)}
.nav-item.active{color:var(--blue);background:var(--blue-soft);font-weight:700}
.nav-item.active::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:18px;background:var(--blue);border-radius:0 3px 3px 0}
.nav-badge{margin-left:auto;background:var(--rose);color:#fff;font-size:.6rem;font-weight:700;padding:2px 6px;border-radius:99px;min-width:18px;text-align:center}
.sidebar-bottom{margin-top:auto;padding:14px;border-top:1px solid var(--border)}
.sb-stats{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6px}
.sb-stat{background:var(--surface2);border-radius:var(--radius-sm);padding:8px 6px;text-align:center;border:1px solid var(--border)}
.sb-stat-num{font-size:1rem;font-weight:800;color:var(--text)}
.sb-stat-label{font-size:.58rem;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-top:2px}

/* ── TOPBAR mobile ── */
#topbar{display:none;position:fixed;top:0;left:0;right:0;height:56px;background:var(--surface);border-bottom:1px solid var(--border);align-items:center;justify-content:space-between;padding:0 14px;z-index:999;box-shadow:var(--shadow-sm)}
.topbar-brand{font-weight:800;font-size:1.1rem;color:var(--blue)}
#menu-toggle{background:var(--surface2);border:1px solid var(--border);color:var(--text);width:34px;height:34px;border-radius:var(--radius-sm);font-size:.9rem;cursor:pointer;display:flex;align-items:center;justify-content:center}

/* ── MAIN ── */
#main{margin-left:var(--sidebar-w);flex:1;padding:28px 28px 80px;min-height:100vh;transition:margin-left .3s}

/* ── PAGES ── */
.page{display:none;animation:fadeIn .22s ease}
.page.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.page-header{margin-bottom:24px}
.page-title{font-size:1.65rem;font-weight:800;color:var(--text);letter-spacing:-.4px}
.page-title span{color:var(--blue)}
.page-subtitle{color:var(--muted);font-size:.84rem;margin-top:3px}

/* ── STAT CARDS ── */
.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;transition:transform .2s,box-shadow .2s,border-color .2s;cursor:default;box-shadow:var(--shadow)}
.stat-card:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(79,99,210,.12);border-color:var(--border2)}
.stat-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;margin-bottom:12px}
.sc-blue .stat-icon{background:var(--blue-soft);color:var(--blue)}
.sc-green .stat-icon{background:var(--green-soft);color:var(--green)}
.sc-amber .stat-icon{background:var(--amber-soft);color:var(--amber)}
.sc-rose .stat-icon{background:var(--rose-soft);color:var(--rose)}
.sc-purple .stat-icon{background:var(--purple-soft);color:var(--purple)}
.stat-num{font-size:1.9rem;font-weight:800;color:var(--text);line-height:1}
.stat-label{color:var(--muted);font-size:.78rem;margin-top:3px}
.stat-sub{font-size:.7rem;color:var(--green);margin-top:4px;font-weight:600}

/* ── VCARD ── */
.vcard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:18px;box-shadow:var(--shadow)}
.vcard-title{font-weight:700;font-size:.93rem;color:var(--text);margin-bottom:14px;display:flex;align-items:center;gap:8px}
.vcard-title i{color:var(--blue);font-size:.9rem}
.vcard-title .vc-action{margin-left:auto;font-size:.75rem;color:var(--blue);cursor:pointer;font-weight:600;background:var(--blue-soft);padding:4px 10px;border-radius:6px;border:none}
.vcard-title .vc-action:hover{background:var(--blue);color:#fff}

/* ── FORM ── */
.form-label{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);margin-bottom:5px;display:block}
.form-control,.form-select{
  background:var(--surface);
  border:1.5px solid var(--border);
  border-radius:var(--radius-sm);
  padding:9px 13px;
  font-family:'Plus Jakarta Sans',sans-serif;
  font-size:.88rem;
  color:var(--text);
  transition:all .2s;
  box-shadow:var(--shadow-sm);
}
.form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-glow);outline:none;background:var(--surface)}
.form-control::placeholder{color:var(--muted)}
.form-select{
  -webkit-appearance:none;
  -moz-appearance:none;
  appearance:none;
  padding-right:36px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238890aa' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 10px center;
  background-size:16px;
  cursor:pointer;
}
textarea.form-control{min-height:80px;resize:vertical}
.input-group-text{background:var(--surface2);border:1.5px solid var(--border);border-right:none;color:var(--muted);border-radius:var(--radius-sm) 0 0 var(--radius-sm)}
.input-group .form-control{border-left:none;border-radius:0 var(--radius-sm) var(--radius-sm) 0}
.input-group .form-control:focus{border-left:none}

/* ── BUTTONS ── */
.btn{font-family:'Plus Jakarta Sans',sans-serif;font-weight:700;border-radius:var(--radius-sm);padding:8px 18px;font-size:.84rem;transition:all .18s;border:none;cursor:pointer}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 4px 14px rgba(79,126,248,.3)}
.btn-primary:hover{background:var(--blue-dark);color:#fff;box-shadow:0 6px 18px rgba(79,126,248,.4)}
.btn-success{background:var(--green);color:#fff}
.btn-success:hover{color:#fff;filter:brightness(1.1)}
.btn-danger{background:var(--rose);color:#fff}
.btn-danger:hover{color:#fff;filter:brightness(1.1)}
.btn-warning{background:var(--amber);color:#fff}
.btn-warning:hover{color:#fff}
.btn-secondary{background:var(--surface2);color:var(--text);border:1.5px solid var(--border)}
.btn-secondary:hover{background:var(--border);color:var(--text)}
.btn-outline-blue{background:var(--blue-soft);color:var(--blue);border:1.5px solid rgba(79,126,248,.3)}
.btn-outline-blue:hover{background:var(--blue);color:#fff}

/* ── ACCENTS ── */
.accents{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:12px}
.acc-btn{background:var(--surface2);border:1.5px solid var(--border);color:var(--text);padding:3px 10px;border-radius:6px;cursor:pointer;font-size:.88rem;font-weight:600;transition:all .15s}
.acc-btn:hover{background:var(--blue);color:#fff;border-color:var(--blue)}

/* ── WORDS TABLE ── */
.words-table-wrap{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow)}
.words-table{width:100%;border-collapse:collapse;background:var(--surface)}
.words-table thead{background:var(--surface2)}
.words-table th{padding:11px 14px;font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--muted);border-bottom:1px solid var(--border)}
.words-table td{padding:11px 14px;border-top:1px solid var(--border);font-size:.84rem;vertical-align:middle}
.words-table tr:hover td{background:#f8f9fe}
.fr-word{font-weight:700;color:var(--blue);font-size:.9rem;font-family:'DM Mono',monospace}
.en-word{color:var(--text)}
.sen-text{color:var(--muted);font-size:.78rem;font-style:italic}
.cat-tag{background:var(--surface2);border:1px solid var(--border);color:var(--muted);padding:2px 8px;border-radius:99px;font-size:.68rem;font-weight:600}

/* ── LEVEL BADGES ── */
.lvl-badge{display:inline-flex;align-items:center;gap:3px;padding:2px 9px;border-radius:99px;font-size:.68rem;font-weight:700}
.lvl-1{background:var(--rose-soft);color:var(--rose)}
.lvl-2{background:var(--amber-soft);color:var(--amber)}
.lvl-3{background:var(--blue-soft);color:var(--blue)}
.lvl-4{background:var(--green-soft);color:var(--green)}
.lvl-5{background:rgba(34,197,94,.2);color:#16a34a}
.due-pill{background:var(--rose-soft);color:var(--rose);padding:2px 8px;border-radius:99px;font-size:.68rem;font-weight:700}

/* ── PROGRESS BARS ── */
.prog-wrap{background:var(--surface2);border-radius:99px;height:6px;overflow:hidden}
.prog-bar{height:100%;border-radius:99px;transition:width .6s ease}

/* ── FLASHCARD ── */
.fc-progress-bar{height:3px;background:var(--surface2);border-radius:99px;margin-bottom:20px;overflow:hidden}
.fc-progress-fill{height:100%;background:linear-gradient(90deg,var(--blue),var(--purple));border-radius:99px;transition:width .4s ease}
.flashcard-scene{perspective:1200px;max-width:500px;height:280px;margin:0 auto 24px;cursor:pointer}
.flashcard{width:100%;height:100%;position:relative;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.4,0,.2,1)}
.flashcard.flipped{transform:rotateY(180deg)}
.card-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:18px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px;text-align:center}
.card-front{background:linear-gradient(135deg,#f0f3ff 0%,#e8edff 100%);border:1.5px solid var(--border2)}
.card-back{background:linear-gradient(135deg,#f0fff6 0%,#e6fdf0 100%);border:1.5px solid rgba(22,163,74,.25);transform:rotateY(180deg)}
.card-flag{font-size:1.4rem;margin-bottom:8px}
.card-lang{font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin-bottom:10px}
.card-word{font-size:2.2rem;font-weight:800;color:var(--text);line-height:1.1;font-family:'DM Mono',monospace}
.card-sen{font-size:.82rem;color:var(--muted);font-style:italic;margin-top:12px;max-width:80%}
.card-hint{font-size:.72rem;color:var(--muted);margin-top:16px;opacity:.6}

/* ── SRS ── */
.srs-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px;text-align:center;max-width:540px;margin:0 auto}
.srs-direction{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--blue);margin-bottom:14px}
.srs-word{font-family:'DM Mono',monospace;font-size:2.8rem;font-weight:700;color:var(--text);line-height:1;margin-bottom:8px}
.srs-reveal{margin-top:20px;padding-top:18px;border-top:2px dashed var(--border)}
.srs-answer{font-size:1.4rem;font-weight:700;color:var(--green)}
.srs-sen{font-size:.82rem;color:var(--muted);font-style:italic;margin-top:6px}
.remaining-badge{display:inline-flex;align-items:center;gap:6px;background:var(--blue-soft);color:var(--blue);padding:4px 12px;border-radius:99px;font-size:.76rem;font-weight:700;margin-bottom:14px}

/* ── MCQ ── */
.mcq-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;max-width:580px;margin:0 auto}
.mcq-question{font-size:2.2rem;font-weight:800;color:var(--text);text-align:center;padding:20px 0 28px;font-family:'DM Mono',monospace}
.mcq-options{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.mcq-opt{background:var(--surface2);border:2px solid var(--border);border-radius:var(--radius-sm);padding:14px 18px;cursor:pointer;font-weight:600;font-size:.88rem;color:var(--text);transition:all .18s;text-align:center}
.mcq-opt:hover{border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}
.mcq-opt.correct{border-color:var(--green);background:var(--green-soft);color:var(--green)}
.mcq-opt.wrong{border-color:var(--rose);background:var(--rose-soft);color:var(--rose)}
.mcq-opt.disabled{pointer-events:none;opacity:.6}

/* ── MATCHING ── */
.match-container{display:grid;grid-template-columns:1fr 60px 1fr;gap:0;max-width:700px;margin:0 auto;align-items:start}
.match-col{display:flex;flex-direction:column;gap:10px}
.match-item{background:var(--surface2);border:2px solid var(--border);border-radius:var(--radius-sm);padding:13px 16px;cursor:pointer;font-weight:700;font-size:.9rem;color:var(--text);transition:all .18s;text-align:center;font-family:'DM Mono',monospace;position:relative}
.match-item:hover{border-color:var(--blue);color:var(--blue)}
.match-item.selected{border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}
.match-item.matched{border-color:var(--green);background:var(--green-soft);color:var(--green);pointer-events:none}
.match-item.wrong-flash{border-color:var(--rose);background:var(--rose-soft);animation:flashRed .4s ease}
@keyframes flashRed{0%,100%{border-color:var(--rose)}50%{border-color:var(--rose);box-shadow:0 0 12px var(--rose-soft)}}
.match-lines{position:relative;display:flex;align-items:center;justify-content:center}
#match-svg{position:absolute;top:0;left:0;width:100%;height:100%;overflow:visible;pointer-events:none}

/* ── SPEED ROUND ── */
.timer-container{position:relative;width:100px;height:100px;margin:0 auto 8px}
.timer-container svg{transform:rotate(-90deg)}
.timer-bg{fill:none;stroke:var(--surface2);stroke-width:7}
.timer-fill{fill:none;stroke:var(--blue);stroke-width:7;stroke-dasharray:301;stroke-dashoffset:0;stroke-linecap:round;transition:stroke-dashoffset .1s linear,stroke .3s}
.timer-label{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.timer-num{font-size:1.7rem;font-weight:800;color:var(--text);line-height:1}
.timer-s{font-size:.6rem;color:var(--muted)}
.speed-question{font-size:2rem;font-weight:800;text-align:center;color:var(--text);padding:18px 0;font-family:'DM Mono',monospace}
.score-display{text-align:center;padding:10px 22px;background:var(--blue-soft);border-radius:12px;display:inline-block}
.score-num{font-size:2.2rem;font-weight:800;color:var(--blue);line-height:1}
.score-label{font-size:.68rem;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}

/* ── FEEDBACK ── */
.feedback-pill{text-align:center;padding:8px 16px;border-radius:var(--radius-sm);font-weight:700;font-size:.86rem;min-height:38px;transition:all .2s}
.fb-correct{background:var(--green-soft);color:var(--green)}
.fb-wrong{background:var(--rose-soft);color:var(--rose)}

/* ── HARD WORDS ── */
.hard-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--border);transition:background .15s}
.hard-item:last-child{border-bottom:none}
.hard-item:hover{background:var(--surface2)}
.hard-avatar{width:38px;height:38px;border-radius:10px;background:var(--blue-soft);display:flex;align-items:center;justify-content:center;font-family:'DM Mono',monospace;font-weight:700;font-size:.8rem;color:var(--blue);flex-shrink:0}
.hard-fr{font-weight:700;color:var(--text);font-size:.9rem;font-family:'DM Mono',monospace}
.hard-en{font-size:.76rem;color:var(--muted);margin-top:2px}
.wrong-pill{background:var(--rose-soft);color:var(--rose);padding:3px 9px;border-radius:99px;font-size:.7rem;font-weight:700;flex-shrink:0}

/* ── TRANSLATOR ── */
.tr-panel{background:var(--surface2);border:1.5px solid var(--border);border-radius:var(--radius);overflow:hidden}
.tr-panel-header{background:var(--surface);padding:9px 14px;font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--muted);display:flex;align-items:center;gap:7px;border-bottom:1px solid var(--border)}
.tr-panel textarea{border:none;border-radius:0;resize:vertical;min-height:120px;font-size:.9rem;padding:12px 14px;background:var(--surface2);color:var(--text)}
.tr-panel textarea:focus{box-shadow:none;background:var(--surface2)}
.tr-out{min-height:120px;padding:12px 14px;font-size:.9rem;color:var(--text);line-height:1.6;background:var(--surface)}

/* ── CATEGORIES ── */
.cat-card{background:var(--surface2);border:1.5px solid var(--border);border-radius:var(--radius);padding:16px 18px;display:flex;align-items:center;gap:12px;transition:border-color .18s,transform .18s;cursor:pointer}
.cat-card:hover{border-color:var(--blue);transform:translateY(-1px)}
.cat-icon-wrap{width:42px;height:42px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0}
.cat-name{font-weight:700;font-size:.9rem;color:var(--text)}
.cat-count{font-size:.75rem;color:var(--muted);margin-top:2px}
.cat-actions{margin-left:auto;display:flex;gap:6px;opacity:0;transition:opacity .18s}
.cat-card:hover .cat-actions{opacity:1}

/* ── QUICK ADD ── */
#quickBox{position:fixed;background:var(--surface);border:1.5px solid var(--border);border-radius:12px;padding:7px 12px;box-shadow:0 8px 32px rgba(79,99,210,.15);display:none;align-items:center;gap:9px;z-index:9999;font-size:.82rem}
#quickBox .qb-label{color:var(--muted)}
#quickBox .qb-word{font-weight:700;color:var(--blue)}
#quickBox .qb-add{background:var(--blue);color:#fff;border:none;padding:4px 12px;border-radius:6px;cursor:pointer;font-size:.78rem;font-weight:600}
#quickBox .qb-close{background:none;border:none;color:var(--muted);cursor:pointer;font-size:.85rem;padding:3px}

/* ── MODAL ── */
.modal-overlay{position:fixed;inset:0;background:rgba(26,29,46,.45);backdrop-filter:blur(6px);display:none;align-items:center;justify-content:center;z-index:10000}
.modal-box{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:28px;width:100%;max-width:420px;box-shadow:0 24px 64px rgba(79,99,210,.18);animation:slideUp .22s ease;margin:14px}
@keyframes slideUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
.modal-title{font-weight:800;font-size:1.1rem;margin-bottom:18px;color:var(--text)}

/* ── CONFIRM MODAL ── */
#confirmModal .modal-box{max-width:360px;text-align:center}
.confirm-icon{font-size:2.5rem;margin-bottom:12px}
.confirm-msg{color:var(--muted);font-size:.88rem;margin-bottom:20px}

/* ── TOAST ── */
#toast{position:fixed;bottom:24px;right:24px;background:var(--surface);border:1.5px solid var(--border);border-left:4px solid var(--blue);border-radius:10px;padding:11px 18px;box-shadow:0 8px 28px rgba(79,99,210,.18);font-size:.84rem;font-weight:600;transform:translateY(70px);opacity:0;transition:all .28s cubic-bezier(.4,0,.2,1);z-index:99999;max-width:280px;color:var(--text)}
#toast.show{transform:translateY(0);opacity:1}
#toast.success{border-left-color:var(--green)}
#toast.error{border-left-color:var(--rose)}

/* ── EMPTY STATE ── */
.empty-state{text-align:center;padding:40px 20px;color:var(--muted)}
.empty-state i{font-size:2.4rem;opacity:.2;margin-bottom:12px;display:block;color:var(--blue)}
.empty-state p{font-size:.9rem}

/* ── QUICK ACTIONS ── */
.quick-action-btn{display:flex;align-items:center;gap:11px;padding:12px 14px;border-radius:var(--radius-sm);background:var(--surface2);border:1.5px solid var(--border);color:var(--text);font-size:.84rem;font-weight:600;cursor:pointer;transition:all .18s;text-align:left;width:100%;margin-bottom:7px}
.quick-action-btn:hover{border-color:var(--blue);background:#eef1ff;color:var(--blue);transform:translateX(3px)}
.quick-action-btn i{width:18px;text-align:center;color:var(--blue)}
.quick-action-btn .qa-arrow{margin-left:auto;color:var(--muted);font-size:.7rem;transition:.18s}
.quick-action-btn:hover .qa-arrow{color:var(--blue);transform:translateX(3px)}
.qa-sub{font-size:.72rem;color:var(--muted);font-weight:400}

/* ── RECENT ACTIVITY ── */
.activity-item{display:flex;align-items:flex-start;gap:11px;padding:10px 0;border-bottom:1px solid var(--border)}
.activity-item:last-child{border-bottom:none}
.act-icon{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.8rem;flex-shrink:0}
.act-text{font-size:.82rem;font-weight:600;color:var(--text)}
.act-time{font-size:.72rem;color:var(--muted);margin-top:2px}

/* ── FOOTER BAR ── */
.footer-bar{background:var(--surface);border-top:1px solid var(--border);padding:12px 28px;display:flex;gap:8px;flex-wrap:wrap;margin-left:var(--sidebar-w);position:fixed;bottom:0;right:0;left:0;z-index:100;transition:margin-left .3s;box-shadow:0 -2px 12px rgba(79,99,210,.06)}
.footer-btn{display:flex;align-items:center;gap:8px;padding:8px 14px;border-radius:var(--radius-sm);background:var(--surface2);border:1.5px solid var(--border);color:var(--text);font-size:.78rem;font-weight:600;cursor:pointer;transition:all .18s}
.footer-btn:hover{border-color:var(--blue);color:var(--blue);background:#eef1ff}
.footer-btn i{font-size:.82rem}

/* ── CHECKBOX TOGGLES ── */
.toggle-row{display:flex;align-items:center;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--border)}
.toggle-row:last-child{border-bottom:none}
.toggle-label{font-size:.84rem;font-weight:600;color:var(--text)}
.toggle-sub{font-size:.72rem;color:var(--muted)}
.toggle-switch{position:relative;width:40px;height:22px;flex-shrink:0}
.toggle-switch input{opacity:0;width:0;height:0}
.toggle-slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background:var(--border);border-radius:99px;transition:.3s}
.toggle-slider::before{content:'';position:absolute;height:16px;width:16px;left:3px;bottom:3px;background:#fff;border-radius:50%;transition:.3s}
.toggle-switch input:checked+.toggle-slider{background:var(--blue)}
.toggle-switch input:checked+.toggle-slider::before{transform:translateX(18px)}

/* ── OVERLAY mobile ── */
#overlay{display:none;position:fixed;inset:0;background:rgba(26,29,46,.4);z-index:999}

/* ── RESPONSIVE ── */
@media(max-width:991px){
  #sidebar{transform:translateX(calc(-1 * var(--sidebar-w)));box-shadow:0 0 40px rgba(0,0,0,.6)}
  #sidebar.open{transform:translateX(0)}
  #overlay.show{display:block}
  #main{margin-left:0;padding:76px 14px 90px}
  #topbar{display:flex}
  .footer-bar{margin-left:0}
  .mcq-options{grid-template-columns:1fr}
}
@media(max-width:576px){
  #main{padding:68px 10px 90px}
  .page-title{font-size:1.35rem}
  .match-container{grid-template-columns:1fr 40px 1fr;gap:0}
}
.hidden{display:none!important}

/* ── WAVE ANIMATION (Dictation) ── */
.wave-bar{
  width:5px;border-radius:3px;
  background:var(--blue);
  height:8px;
  transition:height .1s;
  animation:wavePulse 1.2s ease-in-out infinite;
  animation-delay:calc(var(--i) * 0.12s);
  animation-play-state:paused;
  opacity:.35;
}
.wave-playing .wave-bar{animation-play-state:running;opacity:1}
@keyframes wavePulse{
  0%,100%{height:8px}
  50%{height:32px}
}