:root{--navy:#101d35;--blue:#173564;--ink:#13223a;--lime:#d8ff68;--bg:#f3f6fa;--line:#dfe5ee;--muted:#65738a;--red:#db4f3d;--green:#247a59;--shadow:0 14px 40px rgba(16,29,53,.08);font-family:Inter,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--bg);font-size:16px}
*{box-sizing:border-box}
body{margin:0;min-width:320px}
.hidden{display:none!important}
button,input,select{font:inherit}
button{cursor:pointer;border:0}
.auth-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 15% 15%,#294f88 0,transparent 28%),linear-gradient(145deg,var(--navy),#173564 68%,#21487d);position:relative}
.auth-brand{position:absolute;top:28px;left:clamp(24px,5vw,72px);display:flex;gap:12px;color:#fff;align-items:center}
.auth-brand>span,.brand>span{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:var(--lime);color:var(--navy);font-weight:900}
.auth-brand div,.brand div{display:grid;gap:2px}
.auth-brand small,.brand small{text-transform:uppercase;letter-spacing:.14em;font-size:.68rem;opacity:.6}
.auth-card{width:min(460px,100%);background:#fff;border-radius:26px;padding:32px;box-shadow:0 30px 80px rgba(0,0,0,.25)}
.setup-card{width:min(760px,100%)}
h1,h2,p{margin-top:0}
h1{font-size:2rem;margin-bottom:8px;letter-spacing:-.04em}
h2{letter-spacing:-.035em}
.muted{color:var(--muted);line-height:1.5}
.eyebrow{text-transform:uppercase;letter-spacing:.15em;font-weight:800;font-size:.72rem;color:#6a7890;margin-bottom:5px}
.auth-card label,.dialog-card label{display:grid;gap:8px;font-weight:650;font-size:.9rem;margin-top:18px}
.auth-card input,.dialog-card input,.dialog-card select{height:44px;border:1px solid #c9d3e1;border-radius:11px;padding:0 12px;background:#fff;color:var(--ink);outline:none}
.auth-card input:focus,.dialog-card input:focus,.dialog-card select:focus{border-color:#315e9f;box-shadow:0 0 0 3px rgba(49,94,159,.14)}
.primary,.secondary,.accent,.ghost,.light,.timer-complete{min-height:40px;padding:0 16px;border-radius:11px;font-weight:750}
.primary{background:var(--blue);color:#fff}
.secondary{background:#edf2f8;color:var(--blue);border:1px solid #d5deea}
.accent{background:var(--lime);color:var(--navy)}
.ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.18)}
.wide{width:100%;margin-top:20px}
.form-error{color:#bc382b;margin:12px 0 0;min-height:20px;font-size:.88rem}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form-grid fieldset{border:1px solid var(--line);border-radius:16px;padding:4px 18px 20px}
.form-grid legend{font-weight:800;padding:0 8px}
.password-note{color:var(--muted);font-size:.84rem;margin:16px 0 0}
.topbar{position:sticky;top:0;z-index:10;background:rgba(16,29,53,.97);color:#fff;border-bottom:1px solid rgba(255,255,255,.1)}
.topbar-inner{max-width:1440px;margin:auto;padding:14px clamp(18px,3vw,40px);display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:12px}
.brand strong{font-size:1.05rem}
.top-actions{display:flex;align-items:center;gap:9px}
.date-chip{border:1px solid rgba(255,255,255,.15);border-radius:999px;padding:7px 11px;color:rgba(255,255,255,.75);font-size:.86rem}
.workspace{max-width:1440px;margin:auto;padding:28px clamp(18px,3vw,40px) 50px}
.metrics{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:16px;margin-bottom:24px}
.score-card,.metric-card,.panel,.email-card{border-radius:26px}
.score-card{min-height:176px;background:var(--blue);color:#fff;padding:25px;display:flex;align-items:center;justify-content:space-between;gap:20px;box-shadow:0 18px 55px rgba(16,29,53,.16);overflow:hidden}
.score-card small{color:rgba(255,255,255,.65);font-weight:650}
.score-line{display:flex;align-items:end;gap:12px;margin-top:7px}
.score-line>strong{font-size:3.8rem;line-height:1;font-weight:900;letter-spacing:-.08em}
.score-line>span{background:var(--lime);color:var(--blue);border-radius:999px;padding:5px 10px;font-size:.75rem;font-weight:850;margin-bottom:5px}
.score-card p{margin:13px 0 0;color:rgba(255,255,255,.7);font-size:.88rem}
.score-ring{width:110px;height:110px;flex:none;border-radius:50%;background:conic-gradient(var(--lime) 0 82%,rgba(255,255,255,.15) 82%);display:grid;place-items:center}
.score-ring span{width:77px;height:77px;border-radius:50%;display:grid;place-items:center;background:var(--blue);font-weight:750;font-size:.82rem}
.metric-card{min-height:176px;border:1px solid var(--line);background:#fff;padding:24px;box-shadow:var(--shadow);display:flex;align-items:center;gap:18px}
.metric-card small{color:var(--muted);font-weight:650}
.metric-card strong{display:block;font-size:2.5rem;color:var(--blue);letter-spacing:-.05em;margin-top:4px}
.metric-card p{color:var(--muted);font-size:.86rem;margin:3px 0 0}
.metric-icon{display:grid;place-items:center;width:46px;height:46px;flex:none;border-radius:13px;font-size:1.25rem;font-weight:900}
.metric-icon.alert{background:#fff0ec;color:var(--red)}
.metric-icon.up{background:#eef8e9;color:var(--green)}
.tabs{display:flex;gap:4px;background:#e5ebf4;width:max-content;border-radius:12px;padding:4px;margin-bottom:18px}
.tabs button{background:transparent;color:#56667e;border-radius:9px;padding:9px 15px;font-weight:750}
.tabs button.active{background:#fff;color:var(--ink);box-shadow:0 2px 8px rgba(0,0,0,.08)}
.content-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(330px,.65fr);gap:20px}
.content-grid aside{display:grid;align-content:start;gap:20px}
.panel,.email-card{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:24px}
.panel-heading{display:flex;align-items:end;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:4px}
.panel-heading h2{margin:0;color:var(--blue);font-size:1.5rem}
.panel-heading>span{color:var(--muted);font-size:.86rem}
.task-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto auto;gap:14px;align-items:center;padding:16px 4px;border-bottom:1px solid var(--line)}
.task-row:last-child{border-bottom:0}
.task-row.done{opacity:.55}
.task-row.done h3{text-decoration:line-through}
.task-check{width:20px;height:20px;margin-top:3px;accent-color:var(--blue)}
.task-main{min-width:0;background:transparent;text-align:left;color:var(--ink);padding:0}
.task-meta{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:.8rem}
.subject-pill{background:#edf3ff;color:#244e91;border-radius:999px;padding:4px 9px;font-weight:800}
.task-row h3{font-size:.96rem;margin:7px 0 0;line-height:1.35}
.task-score{text-align:right}
.task-score strong{display:block;font-size:1.5rem;color:var(--red)}
.task-score small{color:var(--muted)}
.practice-intro{color:var(--muted);font-size:.88rem;margin:12px 0 4px}
.practice-button{display:grid;gap:2px;min-width:118px;padding:9px 12px;border-radius:11px;background:#edf3ff;color:#244e91;text-align:left;border:1px solid #d8e4f7}
.practice-button:hover,.practice-button:focus-visible{background:#dfeaff;outline:2px solid transparent;box-shadow:0 0 0 3px rgba(49,94,159,.14)}
.practice-button strong{font-size:.86rem}
.practice-button small{font-size:.7rem;color:#64748b;white-space:nowrap}
.empty{text-align:center;color:var(--muted);padding:42px 12px}
.timer-card{background:var(--blue);color:#fff;padding:25px;box-shadow:0 18px 45px rgba(23,53,100,.2)}
.timer-label{display:flex;justify-content:space-between}
.timer-label .eyebrow{color:rgba(255,255,255,.55)}
.timer-label span{color:var(--lime);font-size:1.4rem}
.timer-subject{color:rgba(255,255,255,.65);margin:18px 0 6px;font-size:.88rem}
.timer-card h2{font-size:1.15rem;line-height:1.3;min-height:46px;margin-bottom:0}
.timer-value{font-family:Consolas,monospace;color:var(--lime);font-size:clamp(2.4rem,4vw,3rem);letter-spacing:-.07em;margin:24px 0}
.timer-actions{display:grid;grid-template-columns:1fr auto;gap:8px}
.light{background:#fff;color:var(--blue)}
.timer-reset{width:44px;border-radius:11px;color:#fff;background:transparent;border:1px solid rgba(255,255,255,.2);font-size:1.25rem}
.timer-complete{width:100%;margin-top:8px;background:transparent;color:rgba(255,255,255,.78)}
.email-card>div{display:flex;gap:12px;align-items:center}
.email-card p{color:var(--muted);font-size:.86rem;margin:3px 0 0}
.mail-icon{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:#edf3ff;color:#244e91}
.subjects-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px 34px;padding-top:18px}
.subject-line{display:grid;gap:8px}
.subject-line>div{display:flex;justify-content:space-between;gap:12px}
.subject-line small{color:var(--muted)}
.progress{height:8px;background:#e7edf4;border-radius:999px;overflow:hidden}
.progress span{display:block;height:100%;border-radius:inherit}
dialog{border:0;padding:0;border-radius:22px;box-shadow:0 30px 90px rgba(16,29,53,.3);width:min(520px,calc(100% - 28px))}
.exercise-dialog{width:min(780px,calc(100% - 28px));max-height:90vh}
.lesson-card{background:#eef4ff;border-left:4px solid #315e9f;border-radius:12px;padding:16px;line-height:1.55;color:#2b4366;margin:18px 0}
.exercise-question{border:1px solid var(--line);border-radius:15px;padding:15px 16px 10px;margin:14px 0}
.exercise-question legend{font-weight:800;line-height:1.4;padding:0 6px;color:var(--blue)}
.exercise-question label{display:flex;grid-template-columns:none;align-items:flex-start;gap:10px;margin:9px 0;padding:8px 10px;border-radius:9px;font-weight:500;cursor:pointer}
.exercise-question label:hover{background:#f2f6fb}
.exercise-question input{width:18px;height:18px;margin:1px 0 0;flex:none;accent-color:var(--blue)}
.exercise-result{margin-top:20px}
.result-score{display:flex;align-items:center;gap:16px;border-radius:16px;padding:18px;background:#fff1ee;color:#9f3529}
.result-score.passed{background:#eaf8f1;color:#1f6c4e}
.result-score>strong{font-size:2.5rem}
.result-score h3,.result-score p{margin:0}
.result-score p{margin-top:3px;font-size:.88rem}
.answer-review{display:grid;gap:10px;margin:18px 0}
.answer-review article{border-left:4px solid;padding:12px 14px;border-radius:9px;background:#f7f9fc}
.answer-review article.correct{border-color:#35a174}
.answer-review article.incorrect{border-color:#db4f3d}
.answer-review p{margin:5px 0 0;color:var(--muted);line-height:1.45}
.answer-review small{display:block;margin-top:6px;color:var(--blue);font-weight:750}
.result-actions{display:flex;justify-content:flex-end;gap:10px}
.result-actions button{min-height:42px}
dialog::backdrop{background:rgba(10,20,38,.46);backdrop-filter:blur(3px)}
.dialog-card{position:relative;padding:28px}
.dialog-card h2{margin-bottom:8px}
.dialog-close{position:absolute;right:16px;top:14px;background:transparent;font-size:1.7rem;color:#64748b}
.file-drop{border:2px dashed #c8d3e2;border-radius:15px;padding:18px!important}
.file-drop input{border:0;padding:7px 0;height:auto}
.file-drop span{color:var(--muted);font-size:.8rem}
.dialog-actions{display:flex;justify-content:flex-end;gap:9px;margin-top:22px}
.dialog-actions button{min-width:110px}
.user-list{margin-top:20px;border-top:1px solid var(--line);padding-top:12px}
.user-item{display:flex;justify-content:space-between;padding:9px 0;color:var(--muted)}
.toast{position:fixed;right:20px;bottom:20px;z-index:50;background:var(--navy);color:#fff;border-radius:12px;padding:13px 17px;box-shadow:var(--shadow);max-width:360px}
@media(max-width:900px){.metrics{grid-template-columns:1fr 1fr}
.score-card{grid-column:1/-1}
.content-grid{grid-template-columns:1fr}
.form-grid,.subjects-grid{grid-template-columns:1fr}
}
@media(max-width:620px){.topbar-inner{align-items:flex-start}
.top-actions{flex-wrap:wrap;justify-content:flex-end}
.date-chip{display:none}
.brand small{display:none}
.metrics{grid-template-columns:1fr}
.score-card{padding:20px}
.score-ring{width:90px;height:90px}
.score-ring span{width:64px;height:64px}
.metric-card{min-height:130px}
.panel,.email-card{padding:18px}
.panel-heading{align-items:start;flex-direction:column}
.auth-card{padding:24px}
.top-actions button{padding:0 11px}
.task-row{grid-template-columns:auto minmax(0,1fr) auto}
.practice-button{grid-column:2/4;width:max-content}
.task-score{grid-column:3;grid-row:1}
}