:root{
  --blue:#1268f4;--blue2:#1d77ff;--blue3:#004bd6;--navy:#10192e;--text:#162038;--muted:#71809a;
  --bg:#f2f5fa;--card:#fff;--line:#e7ebf2;--green:#14b87a;--green-bg:#eafaf4;--orange:#ff9f0a;--orange-bg:#fff4da;
  --purple:#8648f5;--purple-bg:#f3edff;--red:#ef4c58;--red-bg:#fff0f1;--yellow:#ffd84d;--shadow:0 8px 22px rgba(28,48,82,.08);
  --radius:20px;--radius-sm:14px;--safe-bottom:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box}html,body{margin:0;background:#e9eef6;color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;-webkit-font-smoothing:antialiased}
button,input,textarea,select{font:inherit}button{cursor:pointer}.app-shell{width:100%;min-height:100vh;margin:auto;background:var(--bg);max-width:430px;box-shadow:0 0 40px rgba(25,39,68,.12)}
#app{min-height:100vh;position:relative;padding-bottom:calc(78px + var(--safe-bottom))}.screen{min-height:100vh;background:var(--bg)}.screen.no-nav{padding-bottom:24px}
.hero{background:#1469f4 url('assets/hero-bg.svg') center top/cover no-repeat;color:#fff;padding:20px 16px 70px;border-radius:0 0 24px 24px;position:relative}.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:17px}.brand-mark{width:23px;height:23px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.16)}
.top-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.hero-greeting{display:flex;align-items:center;gap:10px;margin-top:28px}.avatar{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:800;background:linear-gradient(135deg,#0c1a36,#3e526f);flex:0 0 auto}.avatar.sm{width:36px;height:36px;font-size:12px}.avatar.xs{width:30px;height:30px;font-size:10px}.avatar.lg{width:74px;height:74px;font-size:22px}
.hero h1,.hero h2,.hero p{margin:0}.hero h2{font-size:18px}.hero p{font-size:14px;margin-top:2px;color:#eaf2ff}.icon-btn{border:0;background:#fff;color:var(--text);width:38px;height:38px;border-radius:50%;display:grid;place-items:center;box-shadow:0 4px 14px rgba(0,0,0,.1);position:relative}.hero .icon-btn{box-shadow:none}.badge-dot{position:absolute;right:-2px;top:-4px;background:var(--red);color:#fff;min-width:18px;height:18px;border-radius:9px;font-size:10px;display:grid;place-items:center;font-weight:800;border:2px solid #fff}
.search{height:44px;border-radius:24px;background:#fff;display:flex;align-items:center;gap:10px;padding:0 16px;color:#5f6e86;margin-top:16px}.search input{border:0;outline:0;width:100%;background:transparent;color:var(--text)}
.content{padding:16px}.content.overlap{margin-top:-46px;position:relative;z-index:2}.card{background:var(--card);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.card.flat{box-shadow:none;border:1px solid var(--line)}.card+.card{margin-top:12px}.section{margin:22px 0}.section:first-child{margin-top:0}.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.section-title{font-size:15px;font-weight:800;color:#1c2940}.link-btn{border:0;background:transparent;color:#0057d9;font-size:12px;font-weight:700;padding:4px 0}.subtle{color:var(--muted);font-size:12px}.tiny{font-size:10px;color:var(--muted)}.price{font-weight:800;color:#004bd6}.strong{font-weight:800}.muted{color:var(--muted)}
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.quick-item{text-align:center;border:0;background:transparent;color:var(--text);padding:0}.quick-icon{width:52px;height:52px;border-radius:16px;margin:auto;display:grid;place-items:center;font-size:22px;position:relative}.quick-icon.blue{color:#2d70f3;background:#eef4ff}.quick-icon.green{color:#0c9c70;background:var(--green-bg)}.quick-icon.orange{color:#f19100;background:var(--orange-bg)}.quick-icon.purple{color:#7b3ff0;background:var(--purple-bg)}.quick-item span{display:block;font-size:11px;margin-top:7px}.micro-badge{position:absolute;top:-8px;left:50%;transform:translateX(-50%);font-size:8px;font-weight:900;color:#fff;padding:3px 6px;border-radius:8px;white-space:nowrap}.micro-badge.red{background:var(--red)}.micro-badge.orange{background:var(--orange)}
.list-card{display:flex;gap:12px;align-items:flex-start}.list-card .grow{flex:1;min-width:0}.thumb{width:76px;height:72px;border-radius:14px;background:linear-gradient(135deg,#d7e7ff,#9ec6ff);display:grid;place-items:center;font-size:24px;color:#2459c5;flex:0 0 auto;overflow:hidden}.thumb.square{width:58px;height:58px}.thumb.purple{background:linear-gradient(135deg,#f1e7ff,#d6c2ff);color:#7438df}.thumb.green{background:linear-gradient(135deg,#e0f8ef,#b7eedc);color:#0e9a69}.thumb.orange{background:linear-gradient(135deg,#fff4dc,#ffe0a6);color:#e68b00}.row{display:flex;align-items:center;gap:8px}.between{justify-content:space-between}.wrap{flex-wrap:wrap}.chip{display:inline-flex;align-items:center;gap:5px;border-radius:999px;padding:6px 9px;font-size:10px;font-weight:700;background:#f2f5fa;color:#5d6b80;border:1px solid #edf0f5}.chip.active{background:#eaf2ff;border-color:#bfd5ff;color:#0d5bdd}.chip.green{background:var(--green-bg);color:#08885e;border-color:#c9f2e3}.chip.orange{background:var(--orange-bg);color:#d37c00;border-color:#ffe0a8}.chip.red{background:var(--red-bg);color:#d94856;border-color:#ffd3d7}.chip.purple{background:var(--purple-bg);color:#7132dc;border-color:#e2d5ff}
.btn{height:46px;border:0;border-radius:14px;font-weight:800;padding:0 16px;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn.primary{background:linear-gradient(135deg,#1470ff,#0054dc);color:#fff}.btn.secondary{background:#edf4ff;color:#0056dc}.btn.soft{background:#f3f5f9;color:var(--text)}.btn.warn{background:#fff0c8;color:#dc7d00}.btn.danger{background:#fff0f1;color:#d94250}.btn.full{width:100%}.btn.sm{height:36px;border-radius:11px;font-size:12px}.btn:disabled{opacity:.45;cursor:not-allowed}
.progress{height:8px;background:#e8edf5;border-radius:999px;overflow:hidden}.progress>span{display:block;height:100%;background:linear-gradient(90deg,#0a62f0,#1c7cff);border-radius:999px}.progress.green>span{background:linear-gradient(90deg,#0bb57b,#20c994)}.progress.orange>span{background:linear-gradient(90deg,#f3a600,#ffc341)}
.navbar{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:min(430px,100%);height:calc(70px + var(--safe-bottom));padding:8px 8px var(--safe-bottom);background:#fff;border-radius:18px 18px 0 0;box-shadow:0 -6px 24px rgba(24,38,67,.08);display:grid;grid-template-columns:repeat(5,1fr);z-index:20}.navitem{border:0;background:transparent;color:#99a6b8;font-size:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;position:relative}.navitem i{font-size:19px}.navitem.active{color:#1d77ff;font-weight:800}.navitem.active:before{content:"";position:absolute;top:-8px;width:48px;height:3px;border-radius:3px;background:#1d77ff}
.page-head{min-height:72px;background:linear-gradient(135deg,#156cf6,#0058de);color:#fff;padding:18px 16px 14px;display:flex;align-items:center;gap:12px;position:sticky;top:0;z-index:10}.page-head.white{background:#fff;color:var(--text);border-bottom:1px solid var(--line)}.back-btn{width:36px;height:36px;border-radius:50%;border:0;background:rgba(255,255,255,.16);color:inherit;display:grid;place-items:center}.page-head.white .back-btn{background:#f1f4f8}.page-title{font-weight:800;font-size:17px;flex:1}.page-actions{display:flex;gap:8px}
.tabs{display:flex;gap:8px;overflow:auto;padding-bottom:2px;scrollbar-width:none}.tabs::-webkit-scrollbar{display:none}.tab{white-space:nowrap;border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px;color:#68778e;font-size:11px;font-weight:700}.tab.active{background:#0e67f4;color:#fff;border-color:#0e67f4}
.form-group{margin:14px 0}.label{display:block;font-size:12px;font-weight:800;margin-bottom:7px}.input,.textarea,.select{width:100%;border:1px solid #dfe5ee;background:#fff;border-radius:14px;min-height:46px;padding:0 14px;outline:0;color:var(--text)}.textarea{padding:12px 14px;min-height:98px;resize:vertical}.input:focus,.textarea:focus,.select:focus{border-color:#7cabff;box-shadow:0 0 0 3px #eaf2ff}.input-wrap{position:relative}.input-wrap .input{padding-right:44px}.input-action{position:absolute;right:7px;top:6px;width:34px;height:34px;border:0;background:transparent;color:#6f7d91}
.auth-wrap{min-height:100vh;background:#fff;display:flex;flex-direction:column}.auth-visual{height:220px;background:#1268f4 url('assets/hero-bg.svg') center/cover no-repeat;color:#fff;border-radius:0 0 34px 34px;padding:30px 24px;display:flex;flex-direction:column;justify-content:flex-end}.auth-body{padding:24px}.auth-body h1{font-size:24px;margin:0 0 6px}.auth-body p{margin:0 0 22px;color:var(--muted)}.divider{display:flex;align-items:center;gap:10px;color:#9aa5b5;font-size:11px;margin:18px 0}.divider:before,.divider:after{content:"";height:1px;background:#e5e9f0;flex:1}.social-btn{height:46px;border-radius:14px;border:1px solid var(--line);background:#fff;width:100%;font-weight:700}.otp{display:grid;grid-template-columns:repeat(6,1fr);gap:7px}.otp input{text-align:center;font-size:20px;font-weight:800;padding:0;min-width:0}
.stepbar{display:flex;gap:5px;margin:8px 0 26px}.stepbar span{height:5px;border-radius:5px;flex:1;background:#e3e8f0}.stepbar span.on{background:#1c72fb}.choice{display:flex;align-items:center;gap:12px;width:100%;padding:14px;border:1px solid var(--line);border-radius:16px;background:#fff;margin:9px 0;text-align:left}.choice.selected{border-color:#6ca0ff;background:#edf4ff}.choice-icon{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:#eef4ff;color:#1d6ef6}
.h-scroll{display:flex;gap:10px;overflow:auto;padding:2px 1px 8px;scrollbar-width:none}.h-scroll::-webkit-scrollbar{display:none}.mini-card{min-width:150px;max-width:170px;background:#fff;border-radius:17px;padding:12px;box-shadow:var(--shadow)}.tutor-card{min-width:122px;max-width:122px;background:#fff;border-radius:16px;padding:5px 5px 10px;box-shadow:var(--shadow)}.tutor-cover{height:62px;border-radius:12px;background:linear-gradient(135deg,#d7ebff,#55bdd3);position:relative;overflow:hidden;display:grid;place-items:center}.tutor-avatar{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,#24344f,#677b9c);border:3px solid rgba(255,255,255,.9);display:grid;place-items:center;color:#fff;font-weight:800}.tutor-card .name{font-size:11px;font-weight:800;margin:7px 2px 3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.rating{font-size:9px;color:#0465d8;background:#fff;padding:3px 6px;border-radius:999px;box-shadow:0 2px 8px rgba(0,0,0,.08);position:absolute;left:5px;bottom:-1px}.status{font-size:8px;padding:3px 7px;border-radius:999px;background:#e8fbf2;color:#079668;margin-top:5px;display:inline-flex;align-items:center;gap:4px}.status.gray{background:#f0f2f5;color:#6f7c90}.status.yellow{background:#fff4d5;color:#cf7b00}.status.blue{background:#e9f2ff;color:#0a61dc}.status.red{background:#fff0f1;color:#d74755}
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.stat{background:#fff;border-radius:16px;padding:13px;border:1px solid var(--line)}.stat .value{font-size:20px;font-weight:900;margin-top:4px}.metric-row{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;padding:10px 0;border-bottom:1px solid #eef1f5}.metric-row:last-child{border-bottom:0}.score-ring{width:120px;height:120px;border-radius:50%;margin:auto;background:conic-gradient(#1c72fb var(--score,80%),#e7ecf4 0);display:grid;place-items:center;position:relative}.score-ring:after{content:"";width:92px;height:92px;background:#fff;border-radius:50%;position:absolute}.score-ring>div{z-index:1;text-align:center}.score-ring b{font-size:30px}.chart{height:116px;display:flex;align-items:flex-end;gap:8px;padding-top:12px}.bar{flex:1;background:#dce8ff;border-radius:6px 6px 2px 2px;min-height:12px;position:relative}.bar.active{background:#1d77ff}.bar:after{content:attr(data-l);position:absolute;bottom:-18px;left:50%;transform:translateX(-50%);font-size:8px;color:#8c98a9}
.timeline{position:relative;padding-left:26px}.timeline:before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:#e5eaf2}.timeline-item{position:relative;margin:0 0 18px}.timeline-item:before{content:"";position:absolute;left:-21px;top:4px;width:10px;height:10px;border-radius:50%;background:#1d77ff;border:3px solid #eaf2ff}.timeline-item.done:before{background:#12b477;border-color:#e2f8ef}.timeline-item.locked:before{background:#bac4d2;border-color:#f1f3f6}
.question-head{display:flex;align-items:center;justify-content:space-between;padding:15px 16px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.question-body{padding:24px 16px}.question-number{font-size:12px;color:#617087;font-weight:700}.question-text{font-size:19px;line-height:1.5;font-weight:800;margin:18px 0}.answer{display:flex;align-items:center;gap:12px;padding:14px;border:1px solid var(--line);border-radius:16px;background:#fff;margin:10px 0}.answer.selected{background:#edf4ff;border-color:#72a4ff}.answer.correct{background:#eafaf4;border-color:#7adbb8}.answer.wrong{background:#fff0f1;border-color:#f2a2aa}.answer-letter{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#f0f3f7;font-size:12px;font-weight:900}.question-footer{display:grid;grid-template-columns:1fr 1fr;gap:10px;position:sticky;bottom:0;background:linear-gradient(0deg,#fff 75%,rgba(255,255,255,0));padding:20px 16px calc(16px + var(--safe-bottom))}.timer{font-weight:900;color:#d84755;background:#fff0f1;border-radius:10px;padding:7px 9px;font-size:11px}
.chat-list{background:#fff}.chat-item{display:flex;gap:11px;padding:14px 16px;border-bottom:1px solid #eef1f5}.chat-item:last-child{border:0}.chat-main{flex:1;min-width:0}.chat-preview{font-size:11px;color:#738096;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:3px}.chat-time{font-size:9px;color:#9aa5b4}.bubble{max-width:78%;padding:10px 12px;border-radius:16px;margin:7px 0;font-size:12px;line-height:1.45}.bubble.them{background:#fff;border:1px solid var(--line);border-bottom-left-radius:5px}.bubble.me{background:#146cf5;color:#fff;margin-left:auto;border-bottom-right-radius:5px}.system-msg{text-align:center;font-size:10px;color:#7d899c;background:#eaf0f8;padding:7px 10px;border-radius:12px;margin:14px auto;max-width:80%}.chat-compose{position:sticky;bottom:0;background:#fff;border-top:1px solid var(--line);padding:10px 12px calc(10px + var(--safe-bottom));display:flex;gap:8px}.chat-compose input{flex:1;border:1px solid var(--line);border-radius:999px;padding:0 14px;min-width:0}.send-btn{width:42px;height:42px;border:0;border-radius:50%;background:#146cf5;color:#fff}
.menu-list{background:#fff;border-radius:18px;overflow:hidden}.menu-item{display:flex;align-items:center;gap:12px;padding:14px;border-bottom:1px solid #eef1f5;background:#fff;width:100%;text-align:left;border-left:0;border-right:0;border-top:0;color:var(--text)}.menu-item:last-child{border-bottom:0}.menu-icon{width:34px;height:34px;border-radius:11px;background:#edf4ff;color:#146cf5;display:grid;place-items:center}.menu-item .grow{flex:1}.chev{color:#a7b1c0}.profile-cover{height:150px;background:#1268f4 url('assets/hero-bg.svg') center/cover no-repeat;position:relative}.profile-avatar-wrap{margin-top:-42px;text-align:center;position:relative;z-index:2}.profile-avatar-wrap .avatar{margin:auto;border:4px solid #fff;box-shadow:0 5px 14px rgba(0,0,0,.12)}
.modal-backdrop{position:fixed;inset:0;background:rgba(12,20,35,.46);z-index:90;display:flex;align-items:flex-end;justify-content:center}.modal{width:min(430px,100%);background:#fff;border-radius:24px 24px 0 0;padding:20px 16px calc(20px + var(--safe-bottom));max-height:86vh;overflow:auto}.modal-handle{width:42px;height:4px;background:#d6dbe4;border-radius:4px;margin:-6px auto 16px}.modal-title{font-weight:900;font-size:18px}.toast{position:fixed;z-index:100;left:50%;bottom:88px;transform:translate(-50%,20px);background:#152039;color:#fff;padding:10px 14px;border-radius:12px;font-size:11px;opacity:0;pointer-events:none;transition:.2s;max-width:360px;box-shadow:0 7px 20px rgba(0,0,0,.18)}.toast.show{opacity:1;transform:translate(-50%,0)}
.center{text-align:center}.empty{padding:52px 24px;text-align:center}.empty i{font-size:38px;color:#b7c2d1;margin-bottom:14px}.empty h3{margin:0 0 6px}.empty p{color:var(--muted);font-size:12px;margin:0 0 18px}.notice{padding:12px 14px;border-radius:14px;background:#edf4ff;color:#245fb6;font-size:11px;line-height:1.5}.notice.warn{background:#fff4d8;color:#a46600}.notice.red{background:#fff0f1;color:#bc3d49}.notice.green{background:#eafaf4;color:#087b57}.sticky-cta{position:sticky;bottom:0;padding:12px 16px calc(12px + var(--safe-bottom));background:linear-gradient(0deg,#fff 80%,rgba(255,255,255,.7));z-index:9}.divider-line{height:1px;background:#edf0f5;margin:14px 0}.spacer{height:8px}.hidden{display:none!important}
.splash{min-height:100vh;background:#1268f4 url('assets/hero-bg.svg') center/cover no-repeat;color:#fff;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:14px}.splash-logo{font-size:30px;font-weight:900;display:flex;align-items:center;gap:10px}.spinner{width:30px;height:30px;border:3px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
@media(min-width:431px){body{padding:24px 0}.app-shell{min-height:calc(100vh - 48px);border-radius:28px;overflow:hidden}.navbar{bottom:24px;border-radius:18px}.modal-backdrop{align-items:center}.modal{border-radius:24px;max-height:80vh}.toast{bottom:110px}}