@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700;800&display=swap');
:root{color-scheme:dark;--bg:#090e1a;--panel:#121b2d;--panel2:#19253b;--line:#273550;--text:#f4f6ff;--muted:#9aa8c0;--accent:#9a8cff;--accent2:#7666ed;--green:#7ee0b0;--red:#ff858d}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 50% -15%,#202a4b 0%,var(--bg) 48%);color:var(--text);font-family:'DM Sans',-apple-system,BlinkMacSystemFont,sans-serif;min-height:100vh}button,input,textarea,select{font:inherit}button{cursor:pointer}.app-shell{max-width:720px;margin:auto;padding:env(safe-area-inset-top) 18px calc(104px + env(safe-area-inset-bottom))}.topbar{display:flex;justify-content:space-between;align-items:center;padding:20px 2px 24px}.brand{font-size:27px;font-weight:800;letter-spacing:-1.5px}.brand span{color:var(--accent)}.eyebrow{font-size:10px;font-weight:800;letter-spacing:1.7px;color:var(--muted)}.accent{color:#b9afff}.avatar{width:42px;height:42px;border-radius:15px;background:linear-gradient(135deg,#a99cff,#6354cb);display:grid;place-items:center;font-weight:800;color:#fff}.view{display:none;animation:fade .2s ease}.view.active{display:block}@keyframes fade{from{opacity:.4;transform:translateY(4px)}to{opacity:1;transform:none}}h1{font-size:34px;line-height:1.08;letter-spacing:-1.3px;margin:10px 0}h2{font-size:19px;margin:0;letter-spacing:-.4px}h3{font-size:16px;margin:0}p{line-height:1.5}.muted{color:var(--muted)}.tiny{font-size:11px}.hero{background:linear-gradient(145deg,#222d4a,#151e32 70%);border:1px solid #354363;border-radius:27px;padding:23px 20px;margin-bottom:25px;box-shadow:0 18px 50px #0003}.hero h1{font-size:37px;margin:12px 0 7px}.hero p{font-size:13px;margin:0 0 23px}.progress-row{display:flex;justify-content:space-between;align-items:end;margin-bottom:9px}.progress-row strong{font-size:30px}.progress-row span{font-size:11px;color:var(--muted)}.progress-track{height:8px;background:#3a4661;border-radius:10px;overflow:hidden}.progress-track div{height:100%;width:0;background:linear-gradient(90deg,#8d80ff,#b3aaff);border-radius:10px;transition:width .25s}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin-top:19px}.stat{background:#ffffff0b;border:1px solid #ffffff0c;border-radius:15px;padding:12px}.stat-icon{display:block;color:#b7adff;font-size:17px;margin-bottom:8px}.stat strong{display:block;font-size:21px}.stat small{color:var(--muted);font-size:10px}.section-head{display:flex;justify-content:space-between;align-items:center;margin:24px 2px 12px}.text-btn{background:none;border:0;color:#b9afff;font-weight:700;font-size:12px;padding:7px}.stack{display:grid;gap:9px}.panel,.task-card,.exam-card,.note-card,.question-card{background:var(--panel);border:1px solid var(--line);border-radius:19px;padding:17px}.task-card{display:flex;align-items:center;gap:11px}.task-card input[type=checkbox]{width:19px;height:19px;accent-color:var(--accent2)}.task-main{flex:1;min-width:0}.task-main strong{display:block;font-size:13px;overflow-wrap:anywhere}.task-main small{display:block;color:var(--muted);font-size:10px;margin-top:4px}.completed .task-main strong{text-decoration:line-through;color:#74819a}.delete-btn{border:0;background:#ffffff0b;color:#aab5ca;border-radius:9px;padding:7px 10px}.callout{display:flex;gap:14px;margin-top:22px;background:linear-gradient(130deg,#211f45,#151d32)}.callout p{font-size:12px;margin:6px 0 12px}.callout-icon{font-size:25px;color:#c2b8ff}.primary,.secondary,.danger,.upload-btn{border:0;border-radius:13px;padding:13px 16px;font-weight:700;font-size:13px;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none}.primary{background:linear-gradient(135deg,#9d91ff,#7465e7);color:white;box-shadow:0 7px 18px #7565e733}.primary:disabled{opacity:.4}.primary.small{padding:10px 13px;font-size:11px}.secondary,.upload-btn{background:#273550;color:#e7eaff;border:1px solid #354563}.danger{background:#48232e;color:#ffb0b6}.form-stack{display:grid;gap:10px;margin-bottom:18px}.form-stack label{font-size:11px;color:#b4c0d5;font-weight:700;margin-top:3px}.form-stack input,.form-stack textarea,.form-stack select,input,textarea,select{width:100%;background:#0c1423;border:1px solid #30405d;border-radius:12px;padding:12px;color:var(--text);outline:none;font-size:13px}.form-stack input:focus,.form-stack textarea:focus,.form-stack select:focus{border-color:var(--accent)}textarea{resize:vertical;min-height:80px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.form-grid>div{min-width:0}.pill{font-size:10px;padding:6px 9px;background:#29264b;color:#c6bdff;border-radius:20px}.page-heading{margin:8px 2px 22px}.page-heading p{font-size:13px;margin:7px 0}.flashcard{min-height:220px;border-radius:23px;border:1px solid #514a88;background:radial-gradient(circle at 80% 10%,#3a356d,#1a2340 62%);padding:23px;display:flex;flex-direction:column;justify-content:space-between;align-items:center;text-align:center;gap:20px;cursor:pointer}.flashcard-content{font-size:22px;font-weight:700;line-height:1.35;max-width:95%}.button-row{display:flex;gap:9px;margin:12px 0 18px}.button-row>*{flex:1;min-width:0}.flashcard+.button-row button{font-size:12px;padding:12px 7px}.quiz-question{font-size:21px;font-weight:800;padding:16px 0}.option-list{display:grid;gap:8px}.option{background:#1b2942;border:1px solid #344663;border-radius:12px;color:#eef1ff;text-align:left;padding:13px}.option.correct{border-color:#55c995;background:#143a35}.option.wrong{border-color:#ef7f8a;background:#41232d}.feedback{font-size:12px;line-height:1.5}.result-box{color:#c7bcff;font-size:14px;font-weight:700}.timer-display{font-size:52px;font-weight:800;letter-spacing:-2px;text-align:center;padding:12px}.chip{border:1px solid #354563;background:#1b2942;color:#dce2f2;border-radius:30px;padding:10px 3px;font-size:11px}.chip.selected{background:#373064;border-color:#8c7eff;color:white}.upload-btn{width:100%;cursor:pointer}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.notice{border:1px solid #594b2c;background:#2a2519;color:#d8c99e;padding:14px;border-radius:14px;font-size:11px;line-height:1.5}.prompt-output{white-space:pre-wrap;background:#0b1322;border:1px solid #354563;padding:13px;border-radius:12px;font-size:12px;line-height:1.5;max-height:300px;overflow:auto}.external-link{color:#b9afff;text-align:center;font-size:12px;text-decoration:none;padding:8px}.tabbar{position:fixed;z-index:5;bottom:0;left:0;right:0;padding:10px 9px calc(10px + env(safe-area-inset-bottom));display:flex;justify-content:space-around;background:#0d1423ed;backdrop-filter:blur(20px);border-top:1px solid #293650}.tab{border:0;background:none;color:#8491aa;display:flex;flex-direction:column;align-items:center;gap:3px;min-width:52px;padding:4px}.tab span{font-size:21px}.tab small{font-size:9px;font-weight:700}.tab.active{color:#b8adff}.toast{position:fixed;z-index:10;bottom:100px;left:50%;transform:translate(-50%,15px);opacity:0;pointer-events:none;background:#e9e7ff;color:#201b42;padding:11px 17px;border-radius:30px;font-size:12px;font-weight:700;transition:.2s;white-space:nowrap}.toast.show{opacity:1;transform:translate(-50%,0)}.empty{padding:18px;text-align:center;color:var(--muted);font-size:12px;background:#111a2a;border:1px dashed #354563;border-radius:14px}.note-card p{font-size:12px;white-space:pre-wrap;color:#c0cbe0}.note-meta{font-size:10px;color:var(--muted);margin-top:7px}@media(min-width:600px){.app-shell{padding-left:28px;padding-right:28px}.tabbar{left:50%;right:auto;transform:translateX(-50%);width:min(720px,100%);border-radius:18px 18px 0 0}.hero{padding:30px}.stats-grid{gap:14px}}