:root{
  --bg:#0d1117;
  --bg2:#111827;
  --panel:#161d2a;
  --panel2:#1c2434;
  --card:#1a2231;
  --card2:#202a3d;
  --line:#273247;
  --txt:#e7edf7;
  --muted:#8ea0b8;
  --dim:#5f7089;
  --accent:#635bff;
  --accent2:#00d4ff;
  --good:#22c1a8;
  --warn:#f5a623;
  --bad:#ef4e7e;
  --gold:#ffd166;
  --radius:16px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --font:'Cairo',sans-serif;
  --font2:'Inter','Cairo',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(99,91,255,.16), transparent 60%),
    radial-gradient(900px 500px at 0% 110%, rgba(0,212,255,.10), transparent 60%),
    var(--bg);
  color:var(--txt);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none}
input,textarea,select{font-family:inherit}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#2b3952;border-radius:8px}
::-webkit-scrollbar-track{background:transparent}

/* ============ LAYOUT ============ */
#app{display:flex;min-height:100vh}
#sidebar{
  width:264px;flex:0 0 264px;
  background:linear-gradient(180deg,#131a28,#0e1420);
  border-inline-end:1px solid var(--line);
  padding:22px 16px;
  position:sticky;top:0;height:100vh;
  display:flex;flex-direction:column;gap:18px;
  overflow-y:auto;
}
#main{flex:1;min-width:0;padding:26px 30px 60px}

/* ============ SIDEBAR ============ */
.brand{display:flex;flex-direction:column;gap:2px;padding:0 6px}
.brand-logo{
  font-family:var(--font2);font-weight:800;font-size:15px;letter-spacing:2px;
  width:54px;height:54px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#fff;box-shadow:0 8px 22px rgba(99,91,255,.45);margin-bottom:10px;
}
.brand-name{font-weight:900;font-size:19px}
.brand-sub{color:var(--muted);font-size:12px}

.user-chip{
  display:flex;gap:12px;align-items:center;
  background:var(--panel);border:1px solid var(--line);
  border-radius:14px;padding:12px;cursor:pointer;transition:.2s;
}
.user-chip:hover{border-color:var(--accent)}
.chip-avatar{
  width:44px;height:44px;border-radius:12px;flex:0 0 44px;
  background:linear-gradient(135deg,var(--card2),var(--panel2));
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:22px;
}
.chip-meta{flex:1;min-width:0}
.chip-level{font-size:12.5px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chip-xpbar{height:6px;background:#0b0f16;border-radius:6px;margin:6px 0 4px;overflow:hidden}
.chip-xpfill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:6px;transition:width .5s}
.chip-xp{font-size:11px;color:var(--muted)}

.nav{display:flex;flex-direction:column;gap:4px}
.nav-item{
  display:flex;align-items:center;gap:12px;
  padding:11px 14px;border-radius:12px;
  color:var(--muted);font-weight:700;font-size:14.5px;
  transition:.18s;border:1px solid transparent;
}
.nav-item:hover{background:var(--panel);color:var(--txt)}
.nav-item.active{
  background:linear-gradient(135deg,rgba(99,91,255,.22),rgba(0,212,255,.12));
  border-color:rgba(99,91,255,.45);color:#fff;
}
.nav-ico{font-size:18px;width:24px;text-align:center}

.side-foot{margin-top:auto;padding:0 6px}
.sync-hint{
  font-size:12.5px;color:var(--accent2);cursor:pointer;font-weight:700;
  padding:9px 12px;background:var(--panel);border-radius:10px;border:1px dashed var(--line);
}
.sync-hint:hover{border-color:var(--accent2)}
.sync-info{font-size:11px;color:var(--dim);margin-top:8px}

/* ============ TOP BAR ============ */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:24px;gap:14px;flex-wrap:wrap;
}
.page-title{font-size:26px;font-weight:900;line-height:1.2}
.page-sub{color:var(--muted);font-size:13.5px;margin-top:4px}
.top-actions{display:flex;gap:10px;align-items:center}
.search-box{
  position:relative;
}
.search-box input{
  background:var(--panel);border:1px solid var(--line);color:var(--txt);
  border-radius:12px;padding:10px 38px 10px 14px;width:240px;font-size:14px;
}
.search-box span{position:absolute;right:12px;top:50%;transform:translateY(-50%);font-size:15px}

/* ============ CARDS / GRIDS ============ */
.section-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.section-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;cursor:pointer;transition:.22s;position:relative;overflow:hidden;
}
.section-card:hover{transform:translateY(-4px);border-color:var(--c,var(--accent));box-shadow:var(--shadow)}
.section-card.st-disabled{opacity:.45;cursor:not-allowed;filter:grayscale(.6)}
.section-card.st-disabled:hover{transform:none;border-color:var(--line);box-shadow:none}
.section-card::before{
  content:'';position:absolute;inset:0 0 auto 0;height:4px;
  background:linear-gradient(90deg,var(--c,var(--accent)),transparent);
}
.sec-letter{
  width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-family:var(--font2);font-weight:800;font-size:18px;color:#fff;margin-bottom:12px;
  background:linear-gradient(135deg,var(--c,var(--accent)),color-mix(in srgb,var(--c,var(--accent)) 55%,#000));
}
.sec-name{font-weight:800;font-size:15.5px;margin-bottom:4px}
.sec-desc{color:var(--muted);font-size:12.5px;margin-bottom:14px}
.sec-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted)}
.tb-wrow{margin-top:12px;display:flex}
.tb-wordbtn.tbtn{padding:5px 9px;font-size:11.5px;border-radius:8px;background:rgba(0,212,255,.1);border-color:var(--accent);color:var(--accent)}
.tb-wordbtn.tbtn:hover{background:rgba(0,212,255,.22)}
.sec-bar{flex:1;height:8px;background:#0b0f16;border-radius:6px;overflow:hidden}
.sec-bar>i{display:block;height:100%;border-radius:6px;background:linear-gradient(90deg,var(--c,var(--accent)),var(--accent2));transition:width .6s}

/* ============ LECTURE / GROUPS ============ */
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--muted);margin-bottom:14px}
.breadcrumb a{color:var(--accent2);font-weight:700}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb .sep{color:var(--dim)}

.lecture-head{display:flex;align-items:center;gap:14px;margin-bottom:20px}
.lecture-ico{width:56px;height:56px;border-radius:16px;font-size:26px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(99,91,255,.35),rgba(0,212,255,.2));border:1px solid var(--line)}
.lecture-title{font-size:21px;font-weight:900}
.lecture-sub{color:var(--muted);font-size:13px;margin-top:3px}
.lecture-stats{margin-right:auto;text-align:left;direction:ltr}

.group{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;margin-bottom:16px;
}
.group-head{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.group-ico{font-size:20px}
.group-name{font-weight:800;font-size:16px}
.group-badge{font-size:11px;color:var(--muted);background:var(--card2);border-radius:20px;padding:3px 10px;font-weight:700}
.group-bar{flex:1;max-width:140px;height:6px;background:#0b0f16;border-radius:6px;overflow:hidden;margin-inline-start:auto}
.group-bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:6px;transition:width .5s}

.file-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:11px}
.file-card{
  display:flex;align-items:center;gap:11px;
  background:var(--card);border:1px solid var(--line);border-radius:13px;
  padding:11px 12px;transition:.18s;cursor:pointer;
}
.file-card:hover{border-color:var(--accent2);transform:translateY(-2px);background:var(--card2)}
.file-card.done{border-color:rgba(34,193,168,.55);background:rgba(34,193,168,.07)}
.file-ico{width:38px;height:38px;flex:0 0 38px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;background:var(--panel2)}
.file-ico.pdf{color:#ff6b6b}
.file-ico.video{color:#ffd166}
.file-ico.image{color:#74c0fc}
.file-ico.folder{color:#b197fc}
.file-body{flex:1;min-width:0}
.file-name{font-size:12.8px;font-weight:700;line-height:1.35;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  overflow-wrap:anywhere;direction:ltr;text-align:left}
.file-kind{font-size:10.5px;color:var(--muted);margin-top:2px}
.file-chk{width:24px;height:24px;flex:0 0 24px;border-radius:8px;border:2px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:13px;color:transparent;transition:.2s;background:transparent}
.file-card.done .file-chk{background:var(--good);border-color:var(--good);color:#04140f}
.file-card:hover .file-chk.disabled{display:none}

.flat-files{display:flex;flex-direction:column;gap:9px}
.flat-file{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:11px 14px;cursor:pointer;transition:.18s}
.flat-file:hover{border-color:var(--accent2);background:var(--card2)}
.flat-file .file-name{font-size:13.5px}

.empty{
  text-align:center;color:var(--dim);padding:40px 10px;font-size:14px;
  border:1px dashed var(--line);border-radius:14px;
}

/* ============ PROGRESS RING ============ */
.ring{--p:0;--c:var(--accent);width:120px;height:120px;position:relative}
.ring svg{transform:rotate(-90deg);display:block}
.ring .bg{stroke:#0b0f16}
.ring .fg{stroke:var(--c);stroke-linecap:round;transition:stroke-dashoffset .7s ease}
.ring .label{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.ring .label b{font-size:22px;font-family:var(--font2)}
.ring .label span{font-size:10.5px;color:var(--muted)}

.dash-hero{
  display:grid;grid-template-columns:280px 1fr;gap:18px;margin-bottom:20px;
}
.hero-panel{
  background:linear-gradient(135deg,var(--panel),var(--card));
  border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;
}
.hero-title{font-weight:900;font-size:17px}
.hero-sub{color:var(--muted);font-size:12.5px}
.hero-stats{display:flex;gap:18px;margin-top:6px}
.hero-stat{text-align:center}
.hero-stat b{display:block;font-family:var(--font2);font-size:19px}
.hero-stat span{font-size:11px;color:var(--muted)}

.dash-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.stat-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;display:flex;flex-direction:column;gap:6px;
}
.stat-card .sc-ico{font-size:24px}
.stat-card .sc-num{font-family:var(--font2);font-size:26px;font-weight:800}
.stat-card .sc-num small{font-size:13px;color:var(--muted);font-weight:600}
.stat-card .sc-lbl{color:var(--muted);font-size:12.5px}

.continue-strip{
  background:linear-gradient(135deg,rgba(99,91,255,.18),rgba(0,212,255,.08));
  border:1px solid rgba(99,91,255,.45);border-radius:var(--radius);
  padding:16px 20px;display:flex;align-items:center;gap:16px;margin-bottom:20px;cursor:pointer;transition:.2s;
}
.continue-strip:hover{transform:translateY(-2px)}
.continue-ico{font-size:30px}
.continue-txt{flex:1}
.continue-txt b{font-size:15.5px;display:block}
.continue-txt span{font-size:12.5px;color:var(--muted)}
.continue-go{font-family:var(--font2);background:var(--accent);color:#fff;border-radius:10px;padding:9px 16px;font-size:13px}

/* ============ BUTTONS / FORMS ============ */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--card2);border:1px solid var(--line);color:var(--txt);
  border-radius:11px;padding:9px 16px;font-size:13.5px;font-weight:700;transition:.18s;
}
.btn:hover{border-color:var(--accent);transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,var(--accent),#4b7bff);border:none;color:#fff}
.btn.good{background:linear-gradient(135deg,var(--good),#17a98f);border:none;color:#04140f}
.btn.warn{background:linear-gradient(135deg,var(--warn),#e38e14);border:none;color:#1a1202}
.btn.bad{background:linear-gradient(135deg,var(--bad),#d63a68);border:none;color:#fff}
.btn.ghost{background:transparent;border-color:var(--line);color:var(--muted)}
.btn.sm{padding:6px 11px;font-size:12px;border-radius:9px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;font-weight:700;color:var(--muted);margin-bottom:6px}
.field input,.field textarea,.field select{
  width:100%;background:var(--bg2);border:1px solid var(--line);color:var(--txt);
  border-radius:11px;padding:10px 12px;font-size:14px;transition:.18s;
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,91,255,.18)}
.field textarea{resize:vertical;min-height:64px;line-height:1.6}
.field .tr-btn{float:left;margin-top:-2px}
.translation{background:rgba(0,212,255,.07);border:1px dashed rgba(0,212,255,.4);border-radius:10px;padding:9px 12px;font-size:13.5px;line-height:1.7;margin-top:6px;color:#c8f4ff}
.translation b{color:var(--accent2);font-size:11px;display:block;margin-bottom:3px}

/* ============ BANK ============ */
.bank-toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:18px}
.filter-chip{padding:7px 14px;border-radius:20px;background:var(--card);border:1px solid var(--line);font-size:12.5px;font-weight:700;color:var(--muted);cursor:pointer;transition:.18s}
.filter-chip.active{background:linear-gradient(135deg,var(--accent),#4b7bff);color:#fff;border-color:transparent}
.filter-chip:hover{border-color:var(--accent2)}
.count-pill{font-size:11.5px;background:var(--card2);color:var(--muted);border-radius:20px;padding:3px 10px;margin-inline-start:6px}
.q-list{display:flex;flex-direction:column;gap:12px}
.q-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;transition:.18s}
.q-item.solved{border-color:rgba(34,193,168,.45);background:rgba(34,193,168,.05)}
.q-head{display:flex;gap:12px;align-items:flex-start;margin-bottom:10px}
.q-num{font-family:var(--font2);font-weight:800;color:var(--accent2);font-size:14px;padding-top:3px;flex:0 0 30px}
.q-text{font-weight:700;font-size:15px;line-height:1.7}
.q-options{margin:8px 0 6px 30px;display:flex;flex-direction:column;gap:5px}
.q-opt{font-size:14px;line-height:1.6;direction:ltr;text-align:left;color:var(--muted)}
.q-opt .opt-key{font-weight:800;color:var(--txt)}
.q-opt.correct{color:var(--good)}
.q-opt.correct .opt-key{color:var(--good)}
.q-check{display:inline-flex;align-items:center;gap:6px;width:22px;height:22px;justify-content:center;border-radius:7px;border:2px solid var(--line);font-size:12px;color:transparent;cursor:pointer;transition:.15s;flex:0 0 22px;vertical-align:middle}
.q-opt.correct .q-check{background:var(--good);border-color:var(--good);color:#04140f}
.explain{margin:10px 0 10px 30px;font-size:13.5px;color:var(--muted);line-height:1.7;
  border-inline-start:3px solid var(--warn);padding-inline-start:12px;white-space:pre-wrap;direction:ltr;text-align:left}
.q-foot{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-inline-start:42px}
.q-tag{font-size:11px;background:var(--panel2);color:var(--muted);border-radius:20px;padding:3px 10px}

/* ============ FLASH CARDS ============ */
.cards-top{display:flex;align-items:center;gap:12px;margin-bottom:18px;flex-wrap:wrap}
.deck-stats{display:flex;gap:16px;margin-inline-start:auto;font-size:12.5px;color:var(--muted)}
.deck-stats b{font-family:var(--font2);font-size:17px;color:var(--txt);display:block}
.flash-stage{perspective:1400px;max-width:800px;margin:0 auto}
.flash-card{
  position:relative;width:100%;height:340px;cursor:pointer;transform-style:preserve-3d;
  transition:transform .5s cubic-bezier(.2,.7,.3,1);border-radius:20px;
}
.flash-card.flipped{transform:rotateY(180deg)}
.flash-face{
  position:absolute;inset:0;border-radius:20px;backface-visibility:hidden;
  display:flex;flex-direction:column;padding:26px;overflow:auto;
  background:linear-gradient(160deg,var(--card2),var(--panel));
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.flash-front{align-items:flex-start;justify-content:center;text-align:center}
.flash-label{font-size:12px;color:var(--accent2);font-weight:800;letter-spacing:1px;position:absolute;top:18px;right:22px}
.flash-q{font-size:19px;font-weight:800;line-height:1.7;width:100%}
.flash-opts{margin-top:12px;width:100%;display:flex;flex-direction:column;gap:7px;direction:ltr;text-align:left}
.flash-opts .fopt{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:9px;padding:7px 11px;font-size:14px;line-height:1.6;color:var(--txt)}
.flash-opts .fopt b{color:var(--accent2);margin-right:6px}
.flash-opts .fopt img{display:block;max-width:100%;max-height:110px;margin-top:6px;border-radius:6px;background:#fff}
.flash-back{transform:rotateY(180deg);overflow-y:auto}
.flash-a{font-size:16.5px;font-weight:800;color:var(--good);line-height:1.7;margin-bottom:14px;direction:ltr;text-align:left}
.flash-e{font-size:13.5px;color:var(--muted);line-height:1.8;white-space:pre-wrap;direction:ltr;text-align:left}
.cards-actions{display:flex;gap:14px;justify-content:center;margin-top:22px}
.cards-actions .btn{padding:13px 22px;font-size:14.5px;border-radius:14px}
.card-hint{text-align:center;color:var(--dim);font-size:12.5px;margin-top:14px}
.flip-progress{display:flex;flex-direction:column;align-items:center;gap:6px;margin-bottom:6px}

/* ============ PROGRESS PAGE ============ */
.ach-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(155px,1fr));gap:12px}
.ach{
  background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 12px;text-align:center;
  display:flex;flex-direction:column;gap:6px;align-items:center;opacity:.42;filter:grayscale(.6);transition:.25s;
}
.ach.earned{opacity:1;filter:none;border-color:rgba(255,209,102,.5);background:linear-gradient(160deg,rgba(255,209,102,.1),var(--card))}
.ach-ico{font-size:30px}
.ach-name{font-size:13px;font-weight:800}
.ach-desc{font-size:11px;color:var(--muted);line-height:1.5}
.ach-sec{margin-bottom:26px}
.ach-sec h3{font-size:15px;font-weight:900;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.ach-sec h3 span{color:var(--dim);font-size:12px;font-weight:600}
.section-clog{display:flex;flex-direction:column;gap:12px}
.sclog{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px}
.sclog-top{display:flex;align-items:center;gap:12px}
.sclog-name{font-weight:800;font-size:14.5px;flex:1}
.sclog-num{font-size:12px;color:var(--muted);font-family:var(--font2)}
.sclog-bar{height:9px;background:#0b0f16;border-radius:7px;margin-top:10px;overflow:hidden}
.sclog-bar>i{display:block;height:100%;border-radius:7px;background:linear-gradient(90deg,var(--c,var(--accent)),var(--accent2));transition:width .6s}

/* ============ TRANSLATE PAGE ============ */
.tr-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;max-width:720px;margin:0 auto}
.tr-card textarea{min-height:130px}
.tr-result{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:16px;margin-top:14px;font-size:15px;line-height:2;direction:rtl;text-align:right;min-height:80px;white-space:pre-wrap}
.tr-result .ph{color:var(--dim)}
.tr-swap{display:flex;align-items:center;gap:8px;justify-content:center;margin-top:12px}
.tr-swap .lang{font-weight:800;font-size:14px;color:var(--muted)}

/* ============ MODAL / VIEWER ============ */
.modal-backdrop{
  position:fixed;inset:0;background:rgba(4,8,15,.78);backdrop-filter:blur(4px);
  z-index:200;display:flex;align-items:center;justify-content:center;padding:18px;
  animation:fadeIn .18s ease;
}
.modal{
  background:var(--bg2);border:1px solid var(--line);border-radius:18px;
  width:min(1120px,100%);max-height:94vh;display:flex;flex-direction:column;
  box-shadow:0 30px 80px rgba(0,0,0,.6);animation:popIn .22s ease;
}
.modal-head{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.modal-title{font-weight:800;font-size:15px;flex:1;direction:ltr;text-align:left;min-width:0;overflow-wrap:anywhere}
.modal-tabs{display:flex;gap:4px;margin-inline-start:6px}
.mtab{padding:7px 15px;border-radius:10px;font-size:12.5px;font-weight:700;color:var(--muted);cursor:pointer;transition:.15s;border:1px solid transparent}
.mtab.active{background:linear-gradient(135deg,var(--accent),#4b7bff);color:#fff}
.mtab:hover:not(.active){border-color:var(--line);background:var(--panel)}
.modal-close{background:var(--card2);border:1px solid var(--line);color:var(--muted);width:34px;height:34px;border-radius:10px;font-size:15px;flex:0 0 34px}
.modal-close:hover{color:#fff;border-color:var(--bad)}
.modal-body{flex:1;overflow:auto;min-height:0;padding:0}
.modal-iframe{width:100%;height:72vh;border:0;display:block;background:#fff}
.modal-foot{display:flex;gap:10px;align-items:center;padding:12px 18px;border-top:1px solid var(--line);flex-wrap:wrap}
.done-toggle{display:flex;align-items:center;gap:9px;font-weight:800;font-size:13.5px;cursor:pointer}
.done-toggle .box{width:22px;height:22px;border-radius:7px;border:2px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:12px;color:transparent;transition:.15s}
.done-toggle.on .box{background:var(--good);border-color:var(--good);color:#04140f}
.pretranslate{
  background:rgba(0,212,255,.06);border:1px dashed rgba(0,212,255,.35);border-radius:11px;
  margin:14px;padding:12px;
}
.pretranslate textarea{min-height:96px;font-size:14px;line-height:1.7;direction:ltr;text-align:left}
.pretranslate .tr-result{direction:rtl;text-align:right}

/* ============ TOASTS ============ */
#toast-root{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:400;display:flex;flex-direction:column;gap:10px;align-items:center;pointer-events:none}
.toast{
  background:var(--panel2);border:1px solid var(--line);border-radius:13px;
  padding:12px 20px;font-size:14px;font-weight:700;box-shadow:var(--shadow);
  display:flex;gap:10px;align-items:center;max-width:90vw;
  animation:slideUp .3s ease;
}
.toast.good{border-color:var(--good);background:linear-gradient(160deg,rgba(34,193,168,.18),var(--panel2))}
.toast.gold{border-color:var(--gold);background:linear-gradient(160deg,rgba(255,209,102,.16),var(--panel2))}
.toast.bad{border-color:var(--bad);background:linear-gradient(160deg,rgba(239,78,126,.15),var(--panel2))}
.toast.out{animation:slideDown .3s ease forwards}

#confetti-canvas{position:fixed;inset:0;pointer-events:none;z-index:500}

/* ============ ANIMATIONS ============ */
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes popIn{from{opacity:0;transform:scale(.95) translateY(10px)}to{opacity:1;transform:none}}
@keyframes slideUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@keyframes slideDown{from{opacity:1;transform:none}to{opacity:0;transform:translateY(16px)}}
@keyframes glowPulse{0%,100%{box-shadow:0 0 0 0 rgba(255,209,102,.5)}50%{box-shadow:0 0 0 12px rgba(255,209,102,0)}}
.achievement-pop{animation:glowPulse 1s ease 2}

.reveal{animation:popIn .3s ease}

/* ============ RESPONSIVE ============ */
@media(max-width:920px){
  #sidebar{width:74px;flex:0 0 74px;padding:14px 10px}
  .brand-name,.brand-sub,.chip-meta,.nav-item span:not(.nav-ico),.side-foot{display:none}
  .nav-item{justify-content:center;padding:11px}
  .brand-logo{margin-bottom:4px}
  .dash-hero{grid-template-columns:1fr}
  #main{padding:18px}
  .search-box input{width:170px}
  .modal-iframe{height:60vh}
}
@media(max-width:600px){
  .section-grid,.dash-grid{grid-template-columns:1fr}
  .topbar{align-items:flex-start;flex-direction:column}
}

/* ============ TARGET BOOKS (كتب أسئلة التارجت) ============ */
.books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin-top:18px}
.book-card{
  background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:16px;cursor:pointer;
  position:relative;overflow:hidden;transition:transform .18s ease,box-shadow .18s ease;display:flex;flex-direction:column;gap:10px;
}
.book-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--accent)}
.book-card::before{content:'';position:absolute;inset:0 auto auto 0;width:100%;height:4px;background:linear-gradient(90deg,var(--c),transparent)}
.bk-top{display:flex;align-items:center;justify-content:space-between}
.bk-letter{width:44px;height:44px;border-radius:13px;background:linear-gradient(135deg,var(--c),color-mix(in srgb,var(--c),#fff 25%));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:20px;box-shadow:0 6px 16px color-mix(in srgb,var(--c),transparent 65%)}
.bk-count{background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:20px;padding:4px 11px;font-size:11.5px;font-weight:700;color:var(--accent)}
.bk-count.none{color:var(--muted)}
.bk-title{font-weight:800;font-size:15.5px}
.bk-sub{font-size:12px;color:var(--muted)}
.bk-progress{display:flex;align-items:center;gap:9px;font-size:11.5px;color:var(--muted)}
.bk-bar{flex:1;height:7px;border-radius:8px;background:rgba(255,255,255,.07);overflow:hidden}
.bk-bar i{display:block;height:100%;border-radius:8px;background:linear-gradient(90deg,var(--c),color-mix(in srgb,var(--c),#fff 20%))}
.bk-go{margin-top:auto;font-size:12.5px;font-weight:800;color:var(--c);display:flex;align-items:center;justify-content:center;padding:9px;border:1px dashed var(--line);border-radius:11px;transition:.15s}
.book-card:hover .bk-go{border-color:var(--c);background:rgba(255,255,255,.03)}
.bk-empty{font-size:12px;color:var(--muted);padding:6px 0}

.modal.book-modal{width:min(1180px,100%);height:94vh;max-height:94vh;padding:0}
.book-title{direction:rtl}
.book-mini{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--c),color-mix(in srgb,var(--c),#fff 25%));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900}
.book-done-pill{background:rgba(34,193,168,.12);border:1px solid rgba(34,193,168,.4);color:var(--good);border-radius:20px;padding:5px 13px;font-size:12px;font-weight:800}
.book-body{flex:1;min-height:0;display:grid;grid-template-columns:1fr 268px}
.book-main{display:flex;flex-direction:column;min-width:0}
.page-top{display:flex;flex-direction:column;gap:2px;padding:12px 16px 10px}
.page-num{font-size:20px;font-weight:900;color:var(--accent);background:rgba(0,212,255,.08);border:1px solid rgba(0,212,255,.3);border-radius:10px;padding:4px 12px;align-self:flex-start}
.page-path{font-size:11.5px;color:var(--muted)}
.book-frame{flex:1;min-height:0;padding:0 16px}
.book-frame .modal-iframe{width:100%;height:100%;min-height:340px;border-radius:12px}
.book-actions{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 16px;flex-wrap:wrap}
.book-center{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:center}
.book-index{border-inline-start:1px solid var(--line);background:var(--bg2);display:flex;flex-direction:column;min-height:0}
.book-index-head{display:flex;align-items:center;justify-content:space-between;padding:13px 14px;font-weight:800;font-size:13.5px;border-bottom:1px solid var(--line)}
.bi-hint{font-size:10.5px;color:var(--muted);font-weight:600}
.book-index-list{flex:1;overflow:auto;padding:10px;display:flex;flex-direction:column;gap:6px}
.bi-item{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:11px;cursor:pointer;border:1px solid transparent;transition:.14s;background:transparent}
.bi-item:hover{background:var(--panel)}
.bi-item.cur{background:rgba(0,212,255,.10);border-color:rgba(0,212,255,.35)}
.bi-item.solved .bi-num{background:var(--good);color:#04140f}
.bi-num{min-width:26px;height:26px;border-radius:8px;background:rgba(255,255,255,.07);color:var(--txt);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:12px}
.bi-ok{color:var(--good);font-size:13px;font-weight:900}
.bi-dot{width:6px;height:6px;border-radius:50%;background:var(--muted)}
.bi-item.cur .bi-name{color:var(--accent)}
.bi-name{font-size:11.5px;font-weight:600;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;direction:ltr;text-align:left}

@media(max-width:920px){
  .book-body{grid-template-columns:1fr;grid-template-rows:1fr auto}
  .book-index{order:0;border-inline-start:none;border-top:1px solid var(--line);max-height:170px}
  .book-index-list{flex-direction:row;overflow:auto;padding:8px}
  .bi-item{flex:0 0 auto;max-width:210px}
  .modal.book-modal{height:96vh}
}
@media(max-width:600px){
  .book-actions{flex-direction:column}
  .book-center{width:100%;flex-direction:column}
  .book-frame .modal-iframe{min-height:260px}
}

/* ---------- target bank (أسئلة التارجت) ---------- */
.tb-pills{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.tb-pill{display:flex;align-items:center;gap:7px;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:7px 14px;font-weight:800;font-size:13px;cursor:pointer;transition:.15s}
.tb-pill:hover{border-color:var(--accent)}
.tb-pill.active{background:linear-gradient(135deg,var(--accent),#4b7bff);color:#06121a;border-color:transparent}
.tb-pill .count-pill{background:rgba(255,255,255,.12);border-radius:10px;padding:1px 7px;font-size:11px;font-weight:800}
.tb-pill.active .count-pill{background:rgba(6,18,26,.16)}
.tb-lects{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.tb-lect{display:flex;align-items:center;gap:7px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:8px 13px;font-weight:700;font-size:12.5px;cursor:pointer;transition:.15s;max-width:100%}
.tb-lect .lect-ico{opacity:.85}
.tb-lect:hover{border-color:var(--accent)}
.tb-lect.active{background:linear-gradient(135deg,#0e7a5f,#22c1a8);color:#06121a;border-color:transparent}
.tb-lect.active .count-pill{background:rgba(6,18,26,.16)}
.tb-lect .count-pill{background:rgba(255,255,255,.14);border-radius:10px;padding:1px 7px;font-size:11px;font-weight:800}
.tb-flags{display:flex;gap:7px;flex-wrap:wrap}

.tb-card{background:var(--card);border:1px solid var(--line);border-radius:18px;overflow:hidden;animation:rise .35s ease}
.tb-toolsbar{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:8px 14px;border-bottom:1px solid var(--line)}
.tb-toolsbar.tb-row1{background:var(--bg2);flex-wrap:wrap;gap:6px}
.tb-toolsbar.tb-row1 .tb-flagmini{border-inline-start:1px dashed var(--line);padding-inline-start:8px}
.tb-flagmini{display:flex;gap:4px;align-items:center;flex-wrap:wrap}
.tb-toolmini{display:flex;gap:4px;align-items:center;flex-wrap:wrap;padding-inline-start:8px}
.tb-explain{display:none;margin:0 16px 12px;border:1px dashed rgba(0,212,255,.3);background:rgba(0,212,255,.05);border-radius:12px;padding:12px;font-size:13.5px;line-height:1.9;white-space:pre-line}
.tb-question{background:#0d111a;padding:8px 16px;display:flex;justify-content:flex-start;direction:ltr}
.tb-qwrap{display:block;flex:1 1 auto;width:auto;padding:0}
.tb-qimg{width:auto;height:auto;display:block;border-radius:12px;max-width:100%;max-height:72vh;object-fit:contain;margin:0}
.tb-qtext{font-size:15.5px;line-height:1.9;font-weight:600;padding:14px;white-space:pre-line;overflow-wrap:break-word;word-break:normal}

.tb-opts{display:flex;flex-direction:column;gap:9px;padding:14px 16px}
.tb-matrix{border-collapse:separate;border-spacing:4px;width:auto;margin:0 auto;padding:14px 16px;font-size:15px}
.tb-matrix .tb-matcell{padding:8px 14px;text-align:center;border:1px solid var(--line);border-radius:8px;background:rgba(255,255,255,.03);white-space:nowrap}
.tb-matrix .tb-matkey{font-weight:900;color:var(--txt);cursor:pointer;background:rgba(255,255,255,.06)}
.tb-matrix thead .tb-matcell:not(:first-child){font-weight:900;color:var(--accent);background:rgba(0,212,255,.08);border-color:rgba(0,212,255,.25)}
.tb-matrix thead .tb-matkey{background:transparent;border-color:transparent;cursor:default}
.tb-matrix tbody .tb-opt{cursor:pointer;transition:.15s}
.tb-matrix tbody .tb-opt:hover .tb-matcell{border-color:var(--accent);background:rgba(0,212,255,.06)}
.tb-matrix tbody .tb-opt.right .tb-matcell{border-color:var(--good);background:rgba(34,193,168,.12)}
.tb-matrix tbody .tb-opt.right .tb-matkey{color:var(--good)}
.tb-matrix tbody .tb-opt.wrong .tb-matcell{border-color:var(--bad);background:rgba(239,78,126,.10)}
.tb-matrix tbody .tb-opt.wrong .tb-matkey{color:var(--bad)}
@media (max-width:640px){.tb-matrix{font-size:13.5px}.tb-matrix .tb-matcell{padding:6px 9px}}
.tb-opt{display:flex;gap:11px;align-items:flex-start;border:2px solid var(--line);border-radius:12px;padding:12px 15px;font-size:15.5px;line-height:1.8;cursor:pointer;transition:.15s;background:rgba(255,255,255,.025);color:var(--txt)}
.tb-opt:hover{border-color:var(--accent);background:rgba(0,212,255,.08)}
.tb-opt-key{min-width:28px;height:28px;border-radius:8px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.12);color:var(--txt);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:14px;flex:0 0 28px}
.tb-opt-t{flex:1;min-width:0;word-break:break-word;overflow-wrap:break-word}
.tb-data-table{margin:10px 0 2px;overflow-x:auto;border-radius:10px;border:1px solid var(--line)}
.tb-table{border-collapse:collapse;width:auto;min-width:60%;background:rgba(255,255,255,.03);font-size:14.5px;line-height:1.6;color:var(--txt)}
.tb-table td{border:1px solid var(--line);padding:7px 12px;text-align:left;white-space:nowrap}
.tb-table tr.tb-th{background:rgba(0,212,255,.10)}
.tb-table tr.tb-th td{font-weight:800;color:var(--accent)}
.tb-opt-img{display:block;padding:10px;text-align:left;direction:ltr}
/* كل صورة خيار في كل تارجت/سكشن: تُعرض مقروءة لكن معتدلة الارتفاع.
   الخيارات متعددة الأسطر (~97-128px) تُضغط بلطف إلى ~70px (نص مقروء ~27px)؛
   والأحادية السطر تبقى على ارتفاعها الطبيعي الصغير. */
.tb-opimg{display:block;width:auto;max-width:100%;height:auto;max-height:70px;object-fit:contain;border-radius:8px;background:#fff}
.tb-cropall{padding:4px 9px;font-size:14px;line-height:1;background:rgba(13,17,26,.8);border:1px solid var(--line);border-radius:10px;cursor:pointer}
.tb-opt.right{border-color:var(--good);background:rgba(34,193,168,.12);box-shadow:0 0 0 1px var(--good)}
.tb-opt.right .tb-opt-key{background:var(--good);color:#04140f}
.tb-opt.wrong{border-color:var(--bad);background:rgba(239,78,126,.13);box-shadow:0 0 0 1px var(--bad)}
.tb-opt.wrong .tb-opt-key{background:var(--bad);color:#fff}

.tb-answer{display:none;border:1px dashed rgba(255,209,102,.4);background:rgba(255,209,102,.06);border-radius:11px;padding:11px 14px;margin:0 16px 12px;font-size:13.5px}
.tb-corr{display:block;font-weight:900;color:var(--gold);margin-top:4px}
.tb-sol{display:flex;gap:11px;align-items:flex-start;border:1.5px solid var(--line);border-radius:11px;padding:9px 12px;font-size:14px;line-height:1.7;margin-bottom:7px}
.tb-sol[data-ans="1"]{border-color:var(--good);background:rgba(34,193,168,.1)}
.tb-sol[data-ans="1"] .tb-opt-key{background:var(--good);color:#04140f}
.tb-sol-mark{flex:0 0 auto;border:1px solid rgba(34,193,168,.5);color:var(--good);border-radius:8px;padding:1px 8px;font-size:11px;font-weight:900;align-self:center}

.tb-tx{display:none;margin:0 16px 14px;border:1px solid rgba(0,212,255,.3);background:rgba(0,212,255,.05);border-radius:12px;padding:12px;font-size:13.5px;line-height:1.9;white-space:pre-line}
.tb-mirror .mir-head{font-size:13px;font-weight:800;color:var(--accent);margin-bottom:8px}
.tb-mirror .mir-txt{font-size:14.5px;line-height:1.9;font-weight:600;margin-bottom:10px;white-space:pre-line}
.tb-mirror .mir-opt{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);background:rgba(255,255,255,.03);border-radius:10px;padding:9px 12px;margin-bottom:7px;font-size:14px;line-height:1.7}

.tb-jumps{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.tb-jump{min-width:30px;height:30px;border-radius:9px;background:var(--panel);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;color:var(--muted);cursor:pointer;transition:.13s}
.tb-jump:hover{border-color:var(--accent);color:var(--accent)}
.tb-jump.cur{background:linear-gradient(135deg,var(--accent),#4b7bff);color:#06121a;border-color:transparent}
.tb-jump.solved{border-color:rgba(34,193,168,.5);color:var(--good)}
.tb-jump.flagged{border-color:rgba(255,209,102,.55);color:var(--gold)}

/* buttons on top of the question */
.tbtn{border:1px solid var(--line);background:var(--panel);color:var(--txt);border-radius:9px;padding:6px 10px;font-family:inherit;font-size:12px;font-weight:800;cursor:pointer;transition:.14s;white-space:nowrap;line-height:1.2}
.tbtn:hover{border-color:var(--accent);color:var(--accent)}
.tbtn.primary{background:linear-gradient(135deg,var(--accent),#4b7bff);color:#06121a;border-color:transparent}
.tbtn.primary:hover{filter:brightness(1.08);color:#06121a}
.tbtn.muted{opacity:.55}
.tbtn.on-tr{background:rgba(0,212,255,.2);border-color:var(--accent);color:var(--accent)}
.tbtn.bad{background:rgba(239,78,126,.13);color:#ff9bbf}
.tbtn.ghost{background:transparent}
.tbtn.on-hard{background:rgba(239,78,126,.2);border-color:var(--bad);color:#ff9bbf}
.tbtn.on-easy{background:rgba(34,193,168,.18);border-color:var(--good);color:var(--good)}
.tbtn.on-prob{background:rgba(242,153,74,.16);border-color:var(--warn);color:var(--warn)}
.tbtn.on-review{background:rgba(255,209,102,.16);border-color:var(--gold);color:var(--gold)}
.tbtn.gold{background:rgba(255,209,102,.16);border-color:var(--gold);color:var(--gold)}
.tbtn.gold:hover{background:rgba(255,209,102,.28);color:#ffd166}
.tbtn:disabled{opacity:.4;cursor:not-allowed}

.calc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}
.calc-grid button{padding:12px;font-size:15px;border-radius:9px;border:1px solid var(--line);background:var(--panel);color:var(--txt);cursor:pointer;font-weight:800;font-family:inherit;transition:.14s}
.calc-grid button:hover{border-color:var(--accent);color:var(--accent)}
.calc-grid .calc-op{background:rgba(0,212,255,.1);color:var(--accent)}
.calc-grid .calc-op:hover{background:rgba(0,212,255,.2);color:var(--accent)}
.calc-grid .calc-clr{background:rgba(239,78,126,.12);color:#ff9bbf}
.calc-grid .calc-clr:hover{background:rgba(239,78,126,.22);color:#ff9bbf}
.calc-grid .calc-eq{background:linear-gradient(135deg,var(--accent),#4b7bff);color:#06121a;border:0}
.calc-grid .calc-eq:hover{filter:brightness(1.1);color:#06121a}

/* manual question crop editor */
.tb-qimg.tb-qcrop{background-repeat:no-repeat;max-height:60vh;flex:0 0 auto}
.crop-modal{max-width:920px;width:96vw}
.crop-body{padding:16px;background:#0c1019;min-height:0;overflow:auto}
.crop-stage{position:relative;display:inline-block;max-width:100%;line-height:0;user-select:none;touch-action:none}
.crop-page{display:block;max-width:100%;height:auto;border-radius:10px}
.crop-box{position:absolute;border:2px solid var(--accent);box-shadow:0 0 0 9999px rgba(2,6,10,.62);cursor:move;box-sizing:border-box}
.crop-handle{position:absolute;width:14px;height:14px;background:#fff;border:2px solid var(--accent);border-radius:3px;box-sizing:border-box}
.ch-nw{top:-7px;left:-7px;cursor:nwse-resize}
.ch-n{top:-7px;left:50%;margin-left:-7px;cursor:ns-resize}
.ch-ne{top:-7px;right:-7px;cursor:nesw-resize}
.ch-w{top:50%;left:-7px;margin-top:-7px;cursor:ew-resize}
.ch-e{top:50%;right:-7px;margin-top:-7px;cursor:ew-resize}
.ch-sw{bottom:-7px;left:-7px;cursor:nesw-resize}
.ch-s{bottom:-7px;left:50%;margin-left:-7px;cursor:ns-resize}
.ch-se{bottom:-7px;right:-7px;cursor:nwse-resize}
.crop-size{display:flex;align-items:center;gap:12px;padding:12px 16px;border-top:1px solid var(--line)}
.crop-size label{font-size:13px;font-weight:700;color:var(--muted);white-space:nowrap}
.crop-size input[type=range]{flex:1;min-width:120px}
.crop-size span{font-size:13px;font-weight:800;color:var(--accent);min-width:44px;text-align:center}
.crop-foot{display:flex;align-items:center;gap:8px;padding:12px 16px;border-top:1px solid var(--line);flex-wrap:wrap}

/* compact target header + progress */
.tb-head{background:var(--bg2);border:1px solid var(--line);border-radius:14px;padding:10px 14px;margin-bottom:14px}
.tb-crumb{display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-bottom:8px}
.tb-crumb a{color:var(--accent2);font-weight:700;cursor:pointer}
.tb-crumb .crumb-cur{opacity:.85}
.tb-headrow{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.tb-htitle{font-size:17px;font-weight:900;display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.tb-hsub{font-size:12px;font-weight:700;color:var(--muted)}
.tb-lect-num{display:inline-flex;align-items:center;background:var(--accent);color:#fff;font-size:11px;font-weight:900;border-radius:12px;padding:1px 9px;line-height:1.5;vertical-align:middle}
.tb-crumb .tb-lect-num{background:var(--accent2);color:#06121a}
.tb-qa-badge{display:inline-flex;align-items:center;background:rgba(226,118,35,.14);color:var(--warn);font-size:11px;font-weight:800;border-radius:12px;padding:1px 9px;line-height:1.6;vertical-align:middle;border:1px solid rgba(226,118,35,.35)}
.tb-flags-mini .filter-chip{padding:4px 10px;font-size:11px;border-radius:14px}
.tb-pbar{position:relative;height:14px;background:var(--panel);border:1px solid var(--line);border-radius:10px;overflow:hidden;margin-top:10px}
.tb-pbar-in{height:100%;background:linear-gradient(90deg,var(--good),#22c1a8);transition:width .3s ease;border-radius:10px}
.tb-pbar-lbl{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:10.5px;font-weight:900;color:#06121a;text-shadow:0 0 6px rgba(255,255,255,.35);letter-spacing:.2px}
.tb-counts{display:flex;gap:6px;align-items:center;justify-content:center;margin-top:8px;font-size:13px;color:var(--muted);flex-wrap:wrap;text-align:center}
.tb-counts b{color:var(--accent);font-size:15px}
.tb-counts .sep{color:var(--line);opacity:.7}

/* explanation as per-answer blocks (horizontal lines) */
.tb-blk{display:flex;gap:10px;align-items:flex-start;padding:7px 10px;margin:0 0 6px;border:1px solid rgba(0,212,255,.16);background:rgba(0,212,255,.05);border-radius:10px;font-size:13px;line-height:1.75;text-align:right}
.tb-blk .blk-key{flex:0 0 24px;height:24px;border-radius:8px;background:rgba(0,212,255,.2);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:13px}
.tb-blk .blk-glyph{flex:0 0 24px;text-align:center}
.tb-blk.muted{border-color:var(--line);background:transparent;color:var(--muted)}

/* floating calculator dock — does not block the question */
.calc-dock{position:fixed;z-index:1300;right:14px;bottom:14px;width:242px;background:var(--bg2);border:1px solid var(--line);border-radius:16px;box-shadow:0 14px 44px rgba(0,0,0,.5);padding:10px;user-select:none}
.calc-head{display:flex;align-items:center;gap:8px;padding:2px 4px 8px;cursor:grab}
.calc-grip{opacity:.5;font-size:13px}
.calc-mini{background:var(--panel);border:1px solid var(--line);color:var(--txt);border-radius:8px;width:26px;height:26px;line-height:1;cursor:pointer;font-weight:900;font-size:12px}
.calc-mini:hover{border-color:var(--accent);color:var(--accent)}
.calc-expr{font-size:11.5px;color:var(--muted);min-height:15px;padding:0 4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.calc-display{display:block;width:100%;background:#0c1019;border:1px solid var(--line);color:var(--txt);font-size:22px;font-weight:800;text-align:left;padding:9px 11px;border-radius:10px;margin:6px 0 9px;min-height:26px;outline:none;cursor:default;appearance:none;-webkit-appearance:none;caret-color:transparent}
.calc-dock .calc-grid{gap:6px}
.calc-dock .calc-grid button{padding:10px 0;font-size:14px}
.calc-hist{max-height:92px;overflow:auto;margin-top:8px;border-top:1px dashed var(--line);padding-top:6px}
.calc-hist .hrow{font-size:11px;color:var(--muted);direction:ltr;text-align:left;padding:3px 4px;border-radius:6px}
.calc-hist .hrow:hover{background:var(--panel);color:var(--accent)}

/* AI chat dock */
.ai-dock{position:fixed;z-index:1300;left:14px;bottom:14px;width:500px;max-width:96vw;max-height:85vh;display:flex;flex-direction:column;background:var(--bg2);border:1px solid var(--line);border-radius:16px;box-shadow:0 14px 44px rgba(0,0,0,.5);padding:10px;user-select:none}
.ai-resize-handle{position:absolute;top:-4px;left:20%;right:20%;height:8px;cursor:ns-resize;border-radius:4px;z-index:10}
.ai-resize-handle:hover{background:var(--accent)}
.ai-resize-handle-v{position:absolute;top:20%;bottom:20%;right:-4px;width:8px;cursor:ew-resize;border-radius:4px;z-index:10}
.ai-resize-handle-v:hover{background:var(--accent)}
.ai-head{display:flex;align-items:center;gap:8px;padding:2px 4px 8px;flex:0 0 auto}
.ai-head span:first-child{font-weight:700;font-size:14px}
.ai-chips{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0;padding:0 2px}
.ai-chip{font-size:11px;font-weight:700;padding:5px 10px;border-radius:20px;background:var(--card);border:1px solid var(--line);color:var(--muted);cursor:pointer;transition:.15s;white-space:nowrap}
.ai-chip:hover{border-color:var(--accent);color:var(--accent);background:rgba(99,91,255,.12)}
.ai-trans{flex:1;min-height:220px;max-height:500px;overflow:auto;margin-top:2px;border-top:1px dashed var(--line);padding:8px 4px 6px;background:var(--panel);border-radius:10px;display:flex;flex-direction:column;gap:6px}
.ai-trans .ai-msg{font-size:12.5px;padding:8px 10px;border-radius:10px;line-height:1.7;max-width:92%;word-break:break-word;white-space:pre-wrap}
.ai-bot{background:var(--card2);border:1px solid var(--line);color:var(--txt);text-align:right;align-self:flex-start;direction:rtl}
.ai-bot h2,.ai-bot h3,.ai-bot h4{direction:rtl;text-align:right}
.ai-bot table{direction:rtl;text-align:right}
.ai-bot strong{color:#fff}
.ai-user{background:linear-gradient(135deg,var(--accent),#4b7bff);border:none;color:#fff;text-align:right;align-self:flex-end;direction:rtl}
.ai-row{display:flex;gap:6px;padding:6px 1px 1px;flex:0 0 auto;align-items:center}
.ai-input{background:var(--panel);border:1px solid var(--line);color:var(--txt);border-radius:10px;padding:9px 10px;font-size:13px;flex:1;min-width:0}
.ai-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,91,255,.15)}
.ai-mini{background:var(--panel);border:1px solid var(--line);color:var(--txt);border-radius:8px;width:28px;height:28px;line-height:1;cursor:pointer;font-weight:900;font-size:13px;flex:0 0 28px}
.ai-mini:hover{border-color:var(--accent);color:var(--accent)}
.ai-thinking{font-size:12px;color:var(--muted);padding:6px 10px;font-style:italic;display:flex;align-items:center;gap:6px}
.ai-thinking i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;animation:aiBlink 1s infinite}
.ai-thinking i:nth-child(2){animation-delay:.15s}
.ai-thinking i:nth-child(3){animation-delay:.3s}
@keyframes aiBlink{0%,100%{opacity:.3}50%{opacity:1}}

/* ============ QUESTIONS: white background + black text ============ */
.q-item,
.tb-card,
.tb-question,
.tb-qwrap,
.tb-explain,
.tb-answer,
.tb-tx,
.tb-blk,
.q-list .q-item,
.tb-card .tb-opts{
  background:#ffffff !important;
  color:#000000 !important;
  border-color:#d1d5db !important;
}
.q-text,
.q-opt,
.q-opt .opt-key,
.tb-qtext,
.tb-opt-t,
.tb-opt-key,
.tb-matcell,
.tb-table,
.tb-table td,
.explain,
.tb-explain,
.tb-answer,
.tb-tx,
.tb-blk,
.tb-sol,
.q-foot .q-tag,
.mir-txt,
.mir-opt{
  color:#000000 !important;
}
.q-item.solved,
.tb-opt.right,
.tb-sol[data-ans="1"]{
  background:#ffffff !important;
  border-color:#9ca3af !important;
}
.tb-opt,
.tb-blk,
.tb-sol,
.mir-opt{
  background:#ffffff !important;
  border-color:#d1d5db !important;
}
.tb-opt-key,
.q-check,
.tb-sol-mark,
.blk-key{
  background:#f3f4f6 !important;
  color:#000000 !important;
  border-color:#d1d5db !important;
}
.q-opt.correct,
.q-opt.correct .opt-key,
.tb-opt.right .tb-opt-key,
.tb-opt.right .tb-matkey{
  color:#000000 !important;
}
.explain{border-inline-start-color:#9ca3af !important}
.tb-question{background:#ffffff !important}
.voice-btn{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--panel);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:18px;cursor:pointer;transition:.15s;flex:0 0 38px}
.voice-btn:hover{border-color:var(--accent);background:rgba(99,91,255,.12)}
.voice-btn.rec{background:linear-gradient(135deg,var(--bad),#d63a68);color:#fff;border-color:transparent;animation:voicePulse 1s infinite}
@keyframes voicePulse{0%,100%{box-shadow:0 0 0 0 rgba(239,78,126,.5)}50%{box-shadow:0 0 0 10px rgba(239,78,126,0)}}