:root{--ink:#1d2a33;--muted:#5d6b75;--line:#d9e1ea;--green:#00275a;--teal:#008a8c;--mint:#e3f2f2;--paper:#f8fafc;--red:#a33b3b}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 system-ui,sans-serif}a{color:var(--green);text-decoration:none}.auth-wrap{max-width:480px;margin:0 auto;padding:60px 22px}.brand{font-weight:900;letter-spacing:.15em;color:var(--ink);font-size:1.2rem}.brand b{color:var(--green)}.auth-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px;margin-top:35px;box-shadow:0 8px 25px #193b3210}.tabs{display:flex;border-bottom:1px solid var(--line);gap:18px;margin-bottom:25px}.tab{border:0;background:none;padding:10px 2px;color:var(--muted);font:inherit;cursor:pointer}.tab.active{color:var(--green);font-weight:800;border-bottom:3px solid var(--green)}h1{line-height:1.1;font-size:2.5rem}.form{display:grid;gap:16px}.form label{display:grid;gap:6px;font-weight:700}.form input,.form select{padding:12px;border:1px solid var(--line);border-radius:7px;font:inherit}.primary{display:inline-block;border:0;background:var(--green);color:#fff;border-radius:7px;padding:12px 16px;font-weight:800;text-align:center;cursor:pointer}.small{padding:8px 12px;font-size:.9rem}.link-button{border:0;background:none;color:var(--green);cursor:pointer}.muted{color:var(--muted)}.center{text-align:center}.hidden{display:none!important}#message{min-height:25px;padding:8px 0}.error{color:var(--red)}.ok{color:var(--green)}.top{max-width:1180px;margin:auto;padding:22px 28px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.outline{border:1px solid var(--green);color:var(--green);background:transparent;border-radius:7px;padding:8px 12px;font:inherit;cursor:pointer}.shell{max-width:1120px;margin:auto;padding:60px 28px}.welcome{background:var(--mint);padding:30px;border-radius:14px;margin-bottom:40px}.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.subject{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px}.subject h3{font-size:1.5rem;margin:7px 0}.teacher{border:1px solid var(--line);border-radius:12px;padding:24px;margin-bottom:38px}.section-title{display:flex;justify-content:space-between;align-items:center}.row{display:grid;grid-template-columns:1fr 1fr 1.4fr;padding:12px 0;border-top:1px solid var(--line);gap:10px}.notice{padding:22px;background:#fff5d9;border-radius:10px;border:1px solid #ead8a4}code{background:#eef3f2;padding:2px 5px;border-radius:4px}@media(max-width:700px){.shell{padding:40px 20px}.subject-grid{grid-template-columns:1fr}.top{padding:18px 20px}.row{grid-template-columns:1fr}.auth-wrap{padding:35px 18px}}

/* ---- With G practice engine additions ---- */
:root{--gold:#b7841f;--goodbg:#e3f3ea;--badbg:#f8e3e3}
html[dir="rtl"] body{font-family:"IBM Plex Sans Arabic",system-ui,"Segoe UI",Tahoma,sans-serif}
html[dir="rtl"] .brand{direction:ltr;display:inline-block}
.brandrow{display:flex;justify-content:space-between;align-items:center;gap:12px}
.topright{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.outline.small{padding:6px 10px;font-size:.9rem;display:inline-block}
.eyebrow{margin:0;color:var(--green);font-weight:800;font-size:.85rem}
.shell.narrow{max-width:680px}
h1{font-size:clamp(1.8rem,6vw,2.5rem)}
h2.q{font-size:1.3rem;line-height:1.6;margin:14px 0 18px;unicode-bidi:plaintext}
.subject{display:flex;flex-direction:column;gap:6px}
.subject h3{margin:0}
.subject .primary{margin-top:8px;align-self:flex-start}
.bar,.progress{height:6px;background:var(--line);border-radius:99px;overflow:hidden}
.bar i,.progress i{display:block;height:100%;background:var(--green);transition:width .4s}
.qcard{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}
.opts{display:grid;gap:10px}
.opt{text-align:start;min-height:52px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--paper);font:inherit;color:inherit;cursor:pointer;unicode-bidi:plaintext}
.opt:disabled{cursor:default}
.opt.right{background:var(--goodbg);border-color:var(--green);color:var(--green);font-weight:700}
.opt.wrong{background:var(--badbg);border-color:var(--red);color:var(--red)}
.fb{margin-top:16px;padding:14px 16px;border-radius:10px}
.fb.good{background:var(--goodbg)}.fb.good strong{color:var(--green)}
.fb.bad{background:var(--badbg)}.fb.bad strong{color:var(--red)}
.fb p{margin:6px 0 0}
.ref,.answer small{color:var(--muted);font-size:.85rem}
.answer{margin:6px 0 14px;padding:12px 16px;background:#fff8e8;border-inline-start:4px solid var(--gold);border-radius:8px}
.answer p{margin:0 0 4px;font-size:1.15rem;font-weight:700;unicode-bidi:plaintext}
.primary.wide{width:100%;margin-top:12px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}
.two>*{text-align:center;padding:12px}
.btn-yes,.btn-no{border-radius:10px;padding:14px;font:inherit;font-weight:700;cursor:pointer;border:1px solid}
.btn-yes{background:var(--goodbg);border-color:var(--green);color:var(--green)}
.btn-no{background:var(--badbg);border-color:var(--red);color:var(--red)}
.done .score{margin:6px 0 18px}
.done .score b{font-size:3.4rem;color:var(--green);line-height:1}
.missed{list-style:none;padding:0;display:grid;gap:10px}
.missed li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.missed p{margin:4px 0;unicode-bidi:plaintext}
.missed .ans{color:var(--green);font-weight:700}
.chip{display:inline-block;font-size:.75rem;padding:2px 9px;border-radius:99px;background:var(--mint);color:var(--green)}
.tablewrap{overflow-x:auto;margin:14px 0 24px;border:1px solid var(--line);border-radius:10px}
.tbl{border-collapse:collapse;width:100%;font-size:.9rem;white-space:nowrap}
.tbl th,.tbl td{padding:10px 12px;text-align:start;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{color:var(--muted);font-weight:600;font-size:.8rem}
.tbl .num{font-variant-numeric:tabular-nums}
button:focus-visible,a:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
@media(max-width:700px){.top{flex-wrap:wrap;gap:10px}#userEmail{display:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* ---- points, challenge, trackers ---- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:22px}
.stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;display:flex;flex-direction:column;gap:2px}
.stat b{font-size:1.6rem;line-height:1.2;color:var(--green);font-variant-numeric:tabular-nums}
.stat span{color:var(--muted);font-size:.85rem}
.stat .bar{margin-top:6px}
.twocol{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:28px}
.panel{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.panel h3{margin:0 0 10px;font-size:1rem}
.badges{display:flex;flex-wrap:wrap;gap:8px}
.badge{display:flex;flex-direction:column;align-items:center;gap:2px;width:84px;padding:8px 4px;border-radius:10px;border:1px dashed var(--line);font-size:1.4rem;filter:grayscale(1);opacity:.45;text-align:center}
.badge small{font-size:.7rem;line-height:1.3;color:var(--muted)}
.badge.on{filter:none;opacity:1;border-style:solid;border-color:var(--gold);background:#fff8e8}
.board{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.board li{display:grid;grid-template-columns:28px 1fr auto;gap:8px;padding:6px 8px;border-radius:8px;align-items:center}
.board li span{color:var(--muted);font-weight:700}
.board li em{font-style:normal;font-weight:700;color:var(--green);font-variant-numeric:tabular-nums}
.board li.me{background:var(--mint)}
.actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.actions .primary{margin:0}
.spr{display:inline-block;border-radius:7px;padding:8px 12px;font-size:.9rem;font-weight:800;background:#fff8e8;color:#8a5f0f;border:1px solid var(--gold)}
.sprintbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.sprintbar b{font-size:2.4rem;color:var(--gold);font-variant-numeric:tabular-nums;line-height:1}
.sprintbar b.hot{color:var(--red)}
.sprintbar span{font-weight:700;color:var(--green)}
.qcard.sprinting .opt{min-height:48px}
.ready{text-align:center;padding:40px 0}
.ready p{font-size:1.6rem;font-weight:800}
.toast{position:fixed;inset-inline-end:20px;top:90px;background:var(--green);color:#fff;font-weight:800;padding:8px 14px;border-radius:99px;animation:pop .9s ease-out forwards;z-index:9}
@keyframes pop{0%{transform:translateY(8px);opacity:0}20%{transform:none;opacity:1}100%{transform:translateY(-24px);opacity:0}}
.earn{display:flex;flex-direction:column;gap:2px;padding:12px 16px;background:#fff8e8;border-radius:10px;margin-bottom:12px}
.earn b{font-size:1.4rem;color:#8a5f0f}
.earn span{color:var(--muted);font-size:.9rem}
.best{font-weight:800;color:#8a5f0f}
.checks{list-style:none;padding:0;margin:0 0 18px;display:grid;gap:6px}
.checks label{display:grid;grid-template-columns:22px 1fr auto;gap:10px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 12px;cursor:pointer}
.checks input{width:18px;height:18px;margin-top:3px;accent-color:var(--green)}
.checks small{white-space:nowrap}
.pages{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.pg{border:1px solid var(--line);border-radius:10px;padding:10px 12px;background:#fff;display:flex;flex-direction:column;gap:2px;font-size:.85rem}
.pg b{font-size:.95rem}
.pg small{color:var(--muted)}
.pg.solid{background:var(--goodbg);border-color:var(--green)}.pg.solid b{color:var(--green)}
.pg.review{background:var(--badbg);border-color:var(--red)}.pg.review b{color:var(--red)}
.pg.part{background:#fff8e8;border-color:var(--gold)}
@media(max-width:700px){.stats{grid-template-columns:1fr 1fr}.twocol{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.toast{animation:none}}


/* ---- SudaGene branding ---- */
:root{--goodbg:#e1f3f2;--gold:#008a8c}
.brand{display:inline-flex;align-items:center;gap:8px;color:var(--green)}
.brand img{display:block}
.brand b{color:var(--teal)}
.primary{background:var(--green)}
.welcome{background:linear-gradient(135deg,#e3f2f2,#e7edf6)}
.opt.right{background:var(--goodbg);border-color:var(--teal);color:var(--teal)}
.fb.good strong,.missed .ans,.pg.solid b,.board li em,.stat b{color:var(--teal)}
.pg.solid{border-color:var(--teal)}
.btn-yes{border-color:var(--teal);color:var(--teal)}
.bar i,.progress i{background:linear-gradient(90deg,var(--green),var(--teal))}
.spr{background:#e3f2f2;color:var(--green);border-color:var(--teal)}
.sprintbar b{color:var(--teal)}
.earn{background:#e3f2f2}.earn b,.best{color:var(--green)}
.badge.on{border-color:var(--teal);background:#eef8f8}
.answer{background:#eef8f8;border-inline-start-color:var(--teal)}
.toast{background:var(--teal)}
.checks input{accent-color:var(--teal)}
.sg-foot{max-width:720px;margin:48px auto 0;padding:28px 22px 40px;border-top:1px solid var(--line);text-align:center;display:flex;flex-direction:column;align-items:center;gap:4px}
.sg-foot img{margin-bottom:6px}
.sg-foot p{margin:0}
.sg-by{font-weight:800;color:var(--green)}
.sg-q{color:var(--muted);font-size:.9rem}
.sg-book{margin-top:8px!important;font-weight:700}
.sg-book a{color:var(--teal);font-weight:800;unicode-bidi:isolate}
.sg-prod{margin-top:6px!important;font-size:.85rem;color:var(--teal);font-weight:700;letter-spacing:.02em}
.sg-book a{white-space:nowrap;display:inline-block}