:root{
  --blue:#1457c8;--blue-700:#0a367f;--blue-900:#091a3b;--green:#269145;--green-700:#176d31;--orange:#f47a1f;--purple:#7c4dff;--red:#e24343;--teal:#20a7a4;
  --text:#111936;--muted:#647089;--line:#e6ebf4;--bg:#f6f9fe;--card:#fff;--shadow:0 14px 35px rgba(17,25,54,.08);--radius:22px;
}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;font-family:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;color:var(--text);background:linear-gradient(180deg,#fff 0%,#f7fbff 55%,#f6f9fe 100%);}
a{text-decoration:none;color:inherit} button,input,select,textarea{font:inherit}.container{width:min(1180px,calc(100% - 40px));margin:0 auto}.page{min-height:100vh;padding-bottom:86px}.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.nav{height:76px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;font-weight:900;color:var(--blue-900);letter-spacing:.2px}.brand svg{width:58px;height:45px}.brand-text{font-size:28px;line-height:1}.brand-text span{color:var(--green)}.tagline{font-size:10px;color:var(--muted);letter-spacing:1.8px;margin-top:3px;font-weight:700}.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto}.nav-link{font-weight:700;color:#1d2742;position:relative;padding:28px 0}.nav-link.active,.nav-link:hover{color:var(--blue)}.nav-link.active:after{content:"";position:absolute;left:0;right:0;bottom:18px;height:3px;border-radius:9px;background:linear-gradient(90deg,var(--blue),var(--green))}.nav-actions{display:flex;gap:12px;align-items:center}.btn{border:0;border-radius:14px;padding:12px 18px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;transition:.2s ease;white-space:nowrap}.btn:hover{transform:translateY(-1px);box-shadow:0 10px 25px rgba(20,87,200,.12)}.btn-primary{background:linear-gradient(135deg,var(--blue),#0e49b5);color:white}.btn-green{background:linear-gradient(135deg,var(--green),#1d7839);color:white}.btn-outline{background:white;color:var(--blue);border:1px solid #bcd0f5}.btn-soft{background:#edf5ff;color:var(--blue)}.btn-danger{background:#fff;color:var(--red);border:1px solid #ffc4c4}.lang-switch{display:flex;border:1px solid var(--line);border-radius:999px;padding:3px;background:white}.lang-btn{border:0;background:transparent;padding:8px 10px;border-radius:999px;font-weight:900;color:var(--muted);cursor:pointer}.lang-btn.active{background:var(--blue);color:#fff}.menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px;font-size:22px;color:var(--blue)}
.hero{position:relative;overflow:hidden;padding:52px 0 40px;background:radial-gradient(circle at 82% 18%,#dfeeff 0 20%,transparent 38%),linear-gradient(135deg,#fff 0%,#f4f9ff 100%)}.hero:after{content:"";position:absolute;right:5%;top:35px;width:300px;height:190px;background-image:radial-gradient(#b8d0f4 1.4px, transparent 1.4px);background-size:15px 15px;opacity:.6}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;position:relative;z-index:1}.eyebrow{display:inline-flex;gap:8px;align-items:center;background:#eaf7ee;color:var(--green-700);padding:10px 16px;border-radius:999px;font-weight:800}.hero h1{font-size:clamp(40px,5vw,72px);line-height:1.02;margin:18px 0;color:var(--blue-900);letter-spacing:-2px}.underline{position:relative;display:inline-block}.underline:after{content:"";position:absolute;left:2px;right:0;bottom:4px;height:9px;background:rgba(38,145,69,.28);border-radius:999px;z-index:-1}.lead{font-size:18px;line-height:1.75;color:#4e5a72;max-width:660px}.hero-actions{display:flex;gap:18px;align-items:center;flex-wrap:wrap;margin-top:24px}.avatar-row{display:flex;align-items:center;gap:10px;color:#26324e;font-weight:800}.avatars{display:flex}.avatar{width:34px;height:34px;border-radius:50%;border:3px solid #fff;margin-left:-8px;background:linear-gradient(135deg,#dbeafe,#bbf7d0);display:grid;place-items:center;font-size:14px}.avatar:first-child{margin-left:0}.hero-visual{min-height:420px;position:relative}.student-card{position:absolute;inset:40px 0 0 40px;background:linear-gradient(160deg,#e9f3ff,#fff);border-radius:36px;box-shadow:var(--shadow);overflow:hidden;border:1px solid var(--line)}.student-figure{position:absolute;right:24px;bottom:12px;width:62%;height:80%;background:linear-gradient(180deg,#7ab1ff,#0c57c4);border-radius:46% 46% 25% 25%;box-shadow:inset 0 -30px 45px rgba(0,0,0,.12)}.student-head{position:absolute;right:33%;top:38px;width:88px;height:88px;border-radius:50%;background:#f0c7a0;box-shadow:0 0 0 12px #17254b}.laptop{position:absolute;right:25%;bottom:84px;width:240px;height:138px;background:#c7ceda;border-radius:12px 12px 3px 3px;box-shadow:0 18px 30px rgba(17,25,54,.18)}.laptop:after{content:"";position:absolute;left:-28px;right:-28px;bottom:-18px;height:18px;background:#a8b2c2;border-radius:0 0 20px 20px}.desk-item{position:absolute;border-radius:18px;background:#fff;box-shadow:var(--shadow);display:flex;align-items:center;justify-content:center;font-weight:900}.desk-item.chart{left:28px;top:70px;width:75px;height:75px;color:var(--green);font-size:38px}.desk-item.check{right:34px;top:100px;width:72px;height:72px;background:var(--green);color:#fff;font-size:36px}.books{position:absolute;right:34px;bottom:26px;width:210px}.book{height:34px;border-radius:7px;margin-top:5px;color:#fff;font-weight:900;display:flex;align-items:center;padding-left:18px}.book.green{background:var(--green)}.book.blue{background:var(--blue)}.book.purple{background:var(--purple)}.book.orange{background:var(--orange)}.plant{position:absolute;left:50px;bottom:42px;width:76px;height:88px}.plant:before{content:"";position:absolute;left:16px;bottom:26px;width:44px;height:44px;background:var(--green);clip-path:polygon(50% 0,65% 45%,100% 15%,78% 62%,100% 88%,58% 76%,50% 100%,42% 76%,0 88%,22% 62%,0 15%,35% 45%)}.plant:after{content:"";position:absolute;left:20px;bottom:0;width:40px;height:32px;background:#fff;border:1px solid var(--line);border-radius:0 0 12px 12px}.section{padding:52px 0}.section-title{font-size:34px;line-height:1.15;margin:0 0 12px;color:var(--blue-900);letter-spacing:-.8px}.section-subtitle{margin:0 0 28px;color:var(--muted);font-size:17px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.feature-card{display:flex;gap:18px;align-items:flex-start}.icon{width:58px;height:58px;border-radius:16px;display:grid;place-items:center;font-size:28px;font-weight:900;flex:0 0 auto}.icon.green{background:#e6f7eb;color:var(--green)}.icon.blue{background:#e8f0ff;color:var(--blue)}.icon.orange{background:#fff0e6;color:var(--orange)}.icon.purple{background:#f0eaff;color:var(--purple)}.card h3{margin:0 0 7px;font-size:22px;color:var(--blue-900)}.card p{margin:0;color:var(--muted);line-height:1.55}.mini-link{font-weight:900;color:var(--blue);display:inline-flex;gap:8px;margin-top:16px}.benefit{padding:22px;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:0 8px 24px rgba(17,25,54,.05)}.benefit h4{margin:14px 0 8px;color:var(--blue-900)}.benefit p{margin:0;color:var(--muted);line-height:1.55}.exam-preview,.exam-card{display:grid;grid-template-columns:220px 1fr 220px;gap:20px}.q-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.q-dot{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:#f1f4f9;color:#25314d;font-weight:900;border:1px solid var(--line)}.q-dot.ok{background:var(--green);color:#fff}.q-dot.bad{background:var(--red);color:#fff}.q-dot.active{background:#fff;color:var(--blue);border:2px solid var(--blue)}.q-dot.warn{background:var(--orange);color:#fff}.options{display:grid;gap:10px}.option{border:1px solid var(--line);border-radius:13px;padding:13px 16px;background:#fff;display:flex;justify-content:space-between;align-items:center}.option.correct{background:#eaf8ee;border-color:#9cd9aa;color:#176d31;font-weight:900}.progress-line{height:10px;background:#e9eef7;border-radius:999px;overflow:hidden}.progress-line span{display:block;height:100%;background:linear-gradient(90deg,var(--green),#54c471);border-radius:999px}.ring{width:86px;height:86px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--green) calc(var(--pct)*1%), #e9eef7 0);font-weight:900;color:var(--green-700);position:relative}.ring:before{content:"";position:absolute;inset:10px;background:#fff;border-radius:50%}.ring span{position:relative}.footer{background:linear-gradient(135deg,#08275e,#0b458e);color:#dbeafe;padding:32px 0;margin-top:20px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:28px}.footer h4{margin:0 0 12px;color:#fff}.footer p,.footer a{color:#dbeafe;line-height:1.8}.footer .brand-text{color:#fff}.breadcrumb{display:flex;gap:8px;align-items:center;color:var(--muted);font-weight:800;margin:24px 0 10px}.page-head{padding:28px 0 16px}.page-title{font-size:44px;line-height:1.05;margin:0;color:var(--blue-900);letter-spacing:-1px}.toolbar{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin:22px 0}.search{height:54px;border:1px solid var(--line);border-radius:16px;background:#fff;padding:0 18px;display:flex;gap:12px;align-items:center;flex:1;min-width:260px}.search input{border:0;outline:0;background:transparent;width:100%;color:var(--text)}.chip-row{display:flex;gap:10px;flex-wrap:wrap}.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:10px 16px;color:#33405e;font-weight:800}.chip.active{background:var(--green);border-color:var(--green);color:#fff}.layout-3{display:grid;grid-template-columns:260px 1fr 260px;gap:20px}.filter-list{display:grid;gap:10px}.filter-item{border:1px solid var(--line);border-radius:14px;padding:12px;background:#fff;display:flex;justify-content:space-between;align-items:center}.test-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.test-card{padding:18px}.meta{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0;margin:14px 0}.meta b{display:block}.meta small{color:var(--muted)}.badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:900}.badge.green{background:#e6f7eb;color:var(--green)}.badge.blue{background:#e8f0ff;color:var(--blue)}.badge.orange{background:#fff0e6;color:var(--orange)}.badge.red{background:#ffeded;color:var(--red)}.badge.purple{background:#f0eaff;color:var(--purple)}.side-card{display:grid;gap:14px}.saved-item{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:10px 0;font-weight:800}.exam-top{display:grid;grid-template-columns:1fr 1.2fr auto;gap:18px;align-items:center}.exam-layout{display:grid;grid-template-columns:250px 1fr 300px;gap:20px}.question-card h2{font-size:22px}.explanation{background:#eaf8ee;border:1px solid #bde7c8;border-radius:16px;padding:16px;color:#176d31;margin-top:16px}.analytics-layout{display:grid;grid-template-columns:240px 1fr;gap:22px}.side-nav{position:sticky;top:96px;align-self:start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.side-nav a{display:flex;align-items:center;gap:10px;border-radius:14px;padding:12px;color:#33405e;font-weight:800}.side-nav a.active,.side-nav a:hover{background:#eaf8ee;color:var(--green)}.kpis{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.kpi{display:flex;gap:16px;align-items:center}.kpi strong{font-size:28px;color:var(--blue-900)}.chart-grid{display:grid;grid-template-columns:1.05fr 1.35fr 1.25fr;gap:16px}.donut{width:170px;height:170px;border-radius:50%;background:conic-gradient(var(--green) 0 62%, var(--red) 62% 100%);display:grid;place-items:center;margin:auto;position:relative}.donut:before{content:"";position:absolute;inset:42px;background:#fff;border-radius:50%}.donut strong{position:relative;font-size:28px}.bars{display:grid;gap:14px}.bar-row{display:grid;grid-template-columns:120px 1fr 42px;gap:10px;align-items:center}.bar{height:14px;background:#eef2f8;border-radius:999px;overflow:hidden}.bar span{height:100%;display:block;border-radius:999px;background:var(--green)}.line-chart{height:210px;display:flex;align-items:flex-end;gap:16px;border-left:1px solid var(--line);border-bottom:1px solid var(--line);padding:15px}.line-col{flex:1;display:flex;align-items:flex-end;justify-content:center;position:relative}.line-col span{width:10px;border-radius:999px;background:linear-gradient(180deg,var(--blue),var(--green));display:block}.data-table{width:100%;border-collapse:collapse;background:#fff;border-radius:16px;overflow:hidden}.data-table th,.data-table td{border-bottom:1px solid var(--line);padding:14px;text-align:left}.data-table th{color:#47536d;background:#f7faff}.auth-wrap{display:grid;grid-template-columns:1fr 1fr;min-height:calc(100vh - 76px)}.auth-art{background:linear-gradient(135deg,#0b458e,#269145);color:white;padding:60px;display:flex;flex-direction:column;justify-content:center;position:relative;overflow:hidden}.auth-art:after{content:"";position:absolute;right:-60px;bottom:-60px;width:320px;height:320px;border-radius:50%;background:rgba(255,255,255,.15)}.auth-box{display:flex;align-items:center;justify-content:center;padding:50px}.form-card{width:min(450px,100%)}.form-group{display:grid;gap:8px;margin-bottom:14px}.form-group label{font-weight:800}.form-group input,.form-group textarea,.form-group select{border:1px solid var(--line);border-radius:14px;padding:14px 16px;background:#fff;outline:0}.profile-grid{display:grid;grid-template-columns:320px 1fr;gap:20px}.profile-avatar{width:110px;height:110px;border-radius:34px;background:linear-gradient(135deg,#dbeafe,#bbf7d0);display:grid;place-items:center;font-size:42px;margin-bottom:16px}.mobile-bottom{display:none;position:fixed;left:0;right:0;bottom:0;z-index:40;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-top:1px solid var(--line);padding:8px 10px}.mobile-bottom a{flex:1;display:grid;place-items:center;color:#667089;font-size:12px;font-weight:800;gap:3px}.mobile-bottom a.active{color:var(--blue)}.mobile-bottom b{font-size:20px}.mobile-only{display:none}.desktop-only{display:initial}
@media(max-width:1100px){.nav-links{display:none;position:absolute;left:20px;right:20px;top:82px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:14px;flex-direction:column;align-items:stretch;gap:0}.nav-links.open{display:flex}.nav-link{padding:14px}.nav-link.active:after{display:none}.menu-btn{display:block;margin-left:auto}.nav-actions{margin-left:0}.hero-grid,.auth-wrap,.profile-grid{grid-template-columns:1fr}.hero-visual{min-height:360px}.student-card{inset:12px}.layout-3,.exam-layout,.analytics-layout{grid-template-columns:1fr}.side-nav{position:static}.test-grid,.grid-4,.kpis,.chart-grid,.exam-card,.exam-preview{grid-template-columns:1fr}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){.container{width:min(100% - 28px, 540px)}.nav{height:70px}.brand svg{width:44px}.brand-text{font-size:22px}.tagline{display:none}.nav-actions .btn{display:none}.lang-switch{margin-left:auto}.hero{padding:28px 0}.hero-grid{gap:10px}.hero h1{font-size:39px;letter-spacing:-1px}.lead{font-size:15px}.hero-visual{min-height:260px}.student-card{border-radius:28px}.student-figure{width:58%;height:72%;right:10px}.student-head{width:58px;height:58px;top:28px}.laptop{width:160px;height:96px;right:20%;bottom:58px}.books{width:130px}.book{height:25px;font-size:10px}.desk-item.chart,.desk-item.check{width:50px;height:50px;font-size:22px}.plant{transform:scale(.75);left:20px}.grid-3,.grid-4,.kpis,.chart-grid,.test-grid,.section{padding:32px 0}.section-title{font-size:28px}.page-title{font-size:35px}.toolbar{align-items:stretch}.search{min-width:0;width:100%}.exam-top{grid-template-columns:1fr}.card{padding:18px}.q-grid{grid-template-columns:repeat(6,1fr)}.footer-grid{grid-template-columns:1fr}.auth-art{padding:36px 24px}.auth-box{padding:26px}.mobile-bottom{display:flex}.desktop-only{display:none}.mobile-only{display:initial}.data-table th,.data-table td{padding:10px;font-size:13px}.analytics-layout .side-nav{display:none}.bar-row{grid-template-columns:92px 1fr 42px}.page{padding-bottom:82px}}

.free-only-card 


/* Readable test question layout */
.question-card{padding:30px;line-height:1.65}
.question-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:18px}
.question-index{display:inline-flex;background:#eaf8ee;color:var(--green-700);border-radius:999px;padding:7px 12px;font-weight:900;margin-right:8px}
.question-original-no{display:inline-flex;background:#f3f6fb;color:#4d5872;border-radius:999px;padding:7px 12px;font-weight:800}
.question-topic{font-weight:900;color:var(--blue);text-align:right;font-size:14px}
.question-text{white-space:pre-line;font-size:21px;line-height:1.75;color:var(--blue-900);font-weight:800;margin:18px 0 22px;letter-spacing:-.2px}
.options{display:grid;gap:12px;margin-top:12px}
.option{width:100%;display:grid;grid-template-columns:42px 1fr 28px;gap:12px;align-items:flex-start;text-align:left;border:1px solid var(--line);border-radius:18px;padding:16px 18px;background:#fff;cursor:pointer;font-size:17px;line-height:1.55;color:#1f2a44;transition:.15s ease}
.option:hover{border-color:#9dc1ff;box-shadow:0 10px 24px rgba(17,25,54,.08);transform:translateY(-1px)}
.option-letter{width:34px;height:34px;border-radius:12px;background:#eef4ff;color:var(--blue);display:grid;place-items:center;font-weight:950;line-height:1}
.option-text{white-space:normal;overflow-wrap:anywhere;padding-top:2px}
.option-mark{font-weight:950;font-size:20px;text-align:center;color:inherit}
.option.correct .option-letter{background:#269145;color:#fff}.option.wrong .option-letter{background:#e54848;color:#fff}.option.selected .option-letter{background:#269145;color:#fff}
.question-actions{justify-content:space-between;margin-top:20px}
.q-dot{cursor:pointer;border:0}.q-dot:hover{filter:brightness(.98);transform:translateY(-1px)}
@media(max-width:720px){.question-card{padding:18px}.question-head{display:grid}.question-topic{text-align:left}.question-text{font-size:18px}.option{grid-template-columns:36px 1fr 24px;font-size:15px;padding:14px}.option-letter{width:30px;height:30px}.question-actions{display:grid;grid-template-columns:1fr}.question-actions .btn{width:100%}}

/* Cloudflare static app helpers */
.mp-toast{position:fixed;left:50%;bottom:92px;transform:translateX(-50%) translateY(20px);z-index:999;background:#111936;color:#fff;border-radius:16px;padding:14px 18px;box-shadow:0 16px 40px rgba(17,25,54,.25);opacity:0;pointer-events:none;transition:.2s ease;font-weight:800;max-width:min(520px,calc(100% - 32px));text-align:center}
.mp-toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.option.wrong{border-color:#ffd0d0;background:#fff7f7}.option.selected{border-color:#bde7c8;background:#f7fff9}
@media(max-width:720px){.mp-toast{bottom:78px}}
.exam-top{grid-template-columns:1.2fr auto 1fr auto auto}
@media(max-width:1100px){.exam-top{grid-template-columns:1fr}}

/* Answer feedback for test screen */
.option.correct,
.option.reveal-correct{
  background:#eaf8ee !important;
  border-color:#8fd19e !important;
  color:#176d31 !important;
  font-weight:900;
}
.option.wrong{
  background:#fff1f1 !important;
  border-color:#f3a0a0 !important;
  color:#b42323 !important;
  font-weight:900;
}
.option.correct .option-letter,
.option.reveal-correct .option-letter{
  background:#269145 !important;
  color:#fff !important;
}
.option.wrong .option-letter{
  background:#e54848 !important;
  color:#fff !important;
}
.feedback-box,
.answer-hint{
  margin-top:16px;
  border-radius:16px;
  padding:15px 16px;
  line-height:1.6;
}
.answer-hint{
  background:#f8fafc;
  border:1px solid #dbe3ef;
  color:#566178;
}
.feedback-box p{margin:6px 0 0;color:inherit}
.feedback-box.success{
  background:#eaf8ee;
  border:1px solid #9cd9aa;
  color:#176d31;
}
.feedback-box.wrong{
  background:#fff1f1;
  border:1px solid #f3a0a0;
  color:#b42323;
}
.feedback-box.neutral{
  background:#f8fafc;
  border:1px solid #dbe3ef;
  color:#566178;
}
.mp-toast[data-type="success"]{background:#116b35;color:#fff}
.mp-toast[data-type="error"]{background:#b42318;color:#fff}
.btn:disabled{opacity:.65;cursor:not-allowed}