:root{
  --blue:#1459b3;--blue-dark:#0e3f80;--blue-soft:#eaf2ff;--cyan:#24a8e0;
  --bg:#f3f6fa;--panel:#fff;--ink:#182230;--muted:#697586;--line:#dfe6ef;
  --green:#1b9a59;--green-soft:#eaf8f0;--yellow:#d89a16;--yellow-soft:#fff7df;
  --red:#d1443e;--red-soft:#fff0ee;--shadow:0 14px 34px rgba(25,51,82,.10);
}
*{box-sizing:border-box}
html{background:var(--bg)}
body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
button,input{font:inherit}button{cursor:pointer}.hidden{display:none!important}
button:focus-visible,input:focus-visible{outline:3px solid #8bc8ff;outline-offset:2px}
.eyebrow,.kicker{font-size:11px;font-weight:900;letter-spacing:.14em;text-transform:uppercase;color:var(--blue)}
.btn{border:1px solid transparent;border-radius:12px;padding:11px 16px;font-weight:800;transition:.16s ease;background:white;color:var(--ink)}
.btn.primary{background:var(--blue);color:white;box-shadow:0 7px 18px rgba(20,89,179,.18)}
.btn.primary:hover{background:var(--blue-dark);transform:translateY(-1px)}
.btn.ghost{border-color:#cad5e1;background:#fff}.btn.large{min-height:48px}.btn.cta{padding:13px 22px;font-size:15px}
.brand-mark{width:58px;height:58px;border-radius:18px;background:white;color:var(--blue);display:grid;place-items:center;font-size:30px;font-weight:950;box-shadow:0 12px 28px #0b2a4c33;margin-bottom:20px}
.brand-mark.small{width:42px;height:42px;border-radius:13px;font-size:22px;margin:0;box-shadow:none;background:linear-gradient(145deg,var(--blue),var(--cyan));color:white}
.auth-shell{min-height:100vh;display:grid;grid-template-columns:1.08fr .92fr;background:white}
.auth-brand{padding:clamp(34px,7vw,100px);background:linear-gradient(145deg,#0d356b 0%,#1459b3 58%,#24a8e0 130%);color:white;display:flex;flex-direction:column;justify-content:center}
.auth-brand .eyebrow{color:#b9dcff}.auth-brand h1{font-size:clamp(46px,6.3vw,86px);line-height:.98;margin:15px 0 26px;max-width:780px;letter-spacing:-.04em}
.auth-brand p{font-size:19px;line-height:1.65;color:#e8f2ff;max-width:670px;margin:0}
.auth-badges{display:flex;flex-wrap:wrap;gap:9px;margin-top:30px}.auth-badges span{border:1px solid #ffffff45;background:#ffffff12;border-radius:999px;padding:8px 12px;font-size:12px;font-weight:800}
.auth-card{margin:auto;width:min(440px,88%);padding:30px;border:1px solid var(--line);border-radius:22px;background:white;box-shadow:var(--shadow)}
.tabs{display:flex;padding:4px;background:#eef3f8;border-radius:12px;margin-bottom:25px}.tab{flex:1;border:0;background:transparent;border-radius:9px;padding:10px;font-weight:800;color:var(--muted)}.tab.active{background:white;color:var(--blue);box-shadow:0 3px 10px #22334412}
.auth-form{display:grid;gap:16px}.auth-form label{display:grid;gap:7px;font-size:13px;font-weight:800}.auth-form input{border:1px solid #cbd6e2;border-radius:11px;padding:13px 14px;background:#fbfcfe}.auth-form small{color:var(--muted);line-height:1.5}

.app-shell{min-height:100vh;padding-bottom:88px}.app-header{height:72px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.header-inner{max-width:1120px;height:100%;margin:auto;padding:0 22px;display:flex;align-items:center;justify-content:space-between}
.app-brand{display:flex;gap:11px;align-items:center}.app-brand b{display:block;font-size:15px}.app-brand small{display:block;color:var(--muted);font-size:11px;margin-top:2px}
.header-actions{display:flex;align-items:center;gap:10px}.avatar{width:39px;height:39px;border-radius:50%;border:0;background:#e8f1fb;color:var(--blue);font-weight:900}
.readiness-chip{border-radius:999px;padding:7px 11px;font-size:11px;font-weight:900}.readiness-chip.red{background:var(--red-soft);color:var(--red)}.readiness-chip.yellow{background:var(--yellow-soft);color:#9b6a00}.readiness-chip.green{background:var(--green-soft);color:var(--green)}
.app-main{max-width:1120px;margin:auto;padding:28px 22px 55px}.view{display:none}.view.active{display:block}

.hero-card{border-radius:24px;background:linear-gradient(130deg,#ffffff 5%,#edf5ff 70%,#e5f8ff);border:1px solid #d9e7f5;padding:32px;display:flex;justify-content:space-between;gap:28px;align-items:center;box-shadow:0 10px 30px rgba(40,90,140,.07)}
.hero-copy{max-width:620px}.hero-copy h2{font-size:34px;margin:8px 0 8px;letter-spacing:-.03em}.hero-copy p{color:var(--muted);font-size:16px;line-height:1.55;margin:0 0 22px}
.readiness-wrap{text-align:center;min-width:185px}.readiness-ring{width:142px;height:142px;border-radius:50%;display:grid;place-items:center;margin:auto;position:relative;background:conic-gradient(var(--red) 0deg,#e9eef4 0)}
.readiness-ring::before{content:"";position:absolute;inset:11px;border-radius:50%;background:white}.readiness-ring>div{position:relative;z-index:2}.readiness-ring strong{font-size:32px;display:block}.readiness-ring span{font-size:11px;color:var(--muted);font-weight:800}.readiness-ring.red{--ring:var(--red)}.readiness-ring.yellow{--ring:var(--yellow)}.readiness-ring.green{--ring:var(--green)}
.traffic{display:flex;justify-content:center;gap:5px;margin:12px 0 6px}.traffic i{width:11px;height:11px;border-radius:50%;opacity:.23}.traffic .red{background:var(--red)}.traffic .yellow{background:var(--yellow)}.traffic .green{background:var(--green)}.traffic i.on{opacity:1;box-shadow:0 0 0 4px rgba(0,0,0,.04)}
.readiness-wrap small{color:var(--muted)}
.quick-stats{display:grid;grid-template-columns:repeat(3,1fr);background:#fff;border:1px solid var(--line);border-radius:16px;margin:14px 0 30px;overflow:hidden}
.quick-stats div{padding:16px 20px;border-right:1px solid var(--line)}.quick-stats div:last-child{border:0}.quick-stats strong{display:block;font-size:22px}.quick-stats span{color:var(--muted);font-size:12px}
.section-heading{display:flex;align-items:end;justify-content:space-between;margin:26px 0 13px}.section-heading h3{font-size:22px;margin:4px 0 0}.section-heading.compact{margin:0 0 18px}.legend{font-size:11px;color:var(--muted)}

.learning-path{display:grid;gap:15px}.path-hf{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}
.path-hf-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.path-hf-title{display:flex;gap:11px;align-items:center}.hf-orb{width:43px;height:43px;border-radius:14px;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-weight:950}.path-hf-title b{display:block}.path-hf-title small{display:block;color:var(--muted);font-size:11px;margin-top:3px}.path-hf-score{font-size:13px;font-weight:900;color:var(--blue)}
.path-levels{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.path-level{border:1px solid #dce4ec;background:#fbfcfe;border-radius:14px;padding:15px;text-align:left;position:relative;min-height:115px}.path-level:hover:not(:disabled){border-color:#9dbde1;background:#f4f9ff}.path-level:disabled{cursor:not-allowed;opacity:.52}.path-level .level-top{display:flex;justify-content:space-between;gap:8px}.path-level .num{font-size:10px;font-weight:900;color:var(--blue);text-transform:uppercase}.path-level .lock{font-size:13px}.path-level b{display:block;margin:7px 0 12px}.mini-progress{height:7px;background:#e8edf3;border-radius:999px;overflow:hidden}.mini-progress i{display:block;height:100%;background:linear-gradient(90deg,var(--blue),var(--cyan));border-radius:999px}.path-level small{display:block;color:var(--muted);font-size:10px;margin-top:7px}
.path-level.passed{border-color:#b9dfc8;background:#f4fbf6}.path-level.passed .mini-progress i{background:var(--green)}

.page-head{padding:8px 0 22px}.page-head h2{font-size:36px;letter-spacing:-.03em;margin:5px 0 7px}.page-head p{margin:0;color:var(--muted);max-width:720px;line-height:1.55}
.practice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}.practice-card{border:1px solid var(--line);background:#fff;border-radius:17px;padding:18px;text-align:left;min-height:138px;transition:.16s}.practice-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#bbcee1}.practice-card.accent{background:linear-gradient(145deg,#1459b3,#208fd1);color:#fff;border:0}.practice-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:#edf4fc;color:var(--blue);font-size:19px;font-weight:900;margin-bottom:16px}.practice-card.accent .practice-icon{background:#ffffff24;color:#fff}.practice-card b{display:block;font-size:15px}.practice-card small{display:block;color:var(--muted);margin-top:5px}.practice-card.accent small{color:#eaf5ff}
.hf-practice-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.hf-practice{border:1px solid var(--line);border-radius:15px;background:#fff;padding:16px;text-align:left}.hf-practice b{display:block}.hf-practice small{color:var(--muted);display:block;margin:4px 0 11px}.hf-practice .mini-progress{margin-top:7px}

.exam-hero{display:grid;grid-template-columns:1.6fr .8fr;gap:15px}.exam-main,.exam-note{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px}.exam-main{background:linear-gradient(145deg,#0f3566,#1459b3);color:#fff}.exam-main h3{font-size:28px;margin:10px 0 18px}.exam-badge{display:inline-block;background:#ffffff1c;border:1px solid #ffffff2f;border-radius:999px;padding:6px 9px;font-size:10px;font-weight:900;letter-spacing:.12em}.exam-facts{display:flex;gap:10px;flex-wrap:wrap}.exam-facts span{background:#ffffff13;border:1px solid #ffffff20;border-radius:12px;padding:10px 13px}.exam-facts b{font-size:20px;margin-right:3px}.exam-main p{color:#dceaff;line-height:1.55;max-width:700px}.exam-main .primary{background:#fff;color:var(--blue)}.exam-note{align-self:stretch;display:flex;flex-direction:column;justify-content:center}.exam-note b{color:var(--blue)}.exam-note p{color:var(--muted);line-height:1.55}
.history-list{display:grid;gap:9px}.history-row{display:grid;grid-template-columns:1fr auto auto;gap:16px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px}.history-row small{color:var(--muted)}.history-score{font-weight:900;font-size:18px}.badge-pass{font-size:11px;font-weight:900;border-radius:999px;padding:6px 9px}.badge-pass.ok{background:var(--green-soft);color:var(--green)}.badge-pass.bad{background:var(--red-soft);color:var(--red)}.empty-list{padding:25px;text-align:center;color:var(--muted);border:1px dashed #cfd8e2;border-radius:14px;background:#fafcfe}

.success-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.success-card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:20px}.success-card .label{display:block;color:var(--muted);text-transform:uppercase;font-size:10px;font-weight:900;letter-spacing:.08em}.success-card strong{font-size:30px;display:block;margin:8px 0}.success-card p{font-size:12px;color:var(--muted);line-height:1.45;margin:0}.big-status{font-size:28px;font-weight:950;margin:8px 0}.big-status.red{color:var(--red)}.big-status.yellow{color:#a46d00}.big-status.green{color:var(--green)}
.panel{margin-top:15px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.success-hfs{display:grid;gap:13px}.success-hf-row{display:grid;grid-template-columns:60px 1fr 54px;align-items:center;gap:12px}.success-hf-row b{font-size:13px}.success-hf-row strong{text-align:right;font-size:13px}.success-hf-row .bar{height:10px;border-radius:999px;background:#edf1f5;overflow:hidden}.success-hf-row .bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--blue),var(--cyan))}
.recommendation{display:flex;gap:14px;align-items:center;background:#f5f9ff;border-radius:14px;padding:15px}.recommendation .rec-icon{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:#e4effd;color:var(--blue);font-weight:950}.recommendation p{margin:3px 0 0;color:var(--muted);font-size:13px}

.settings-list{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}.setting-row{padding:17px 19px;border-bottom:1px solid var(--line)}.setting-row b{display:block}.setting-row small{display:block;margin-top:4px;color:var(--muted)}.setting-row.info{background:#f8fbff}.setting-action{width:100%;border:0;border-bottom:1px solid var(--line);padding:17px 19px;text-align:left;background:#fff;font-weight:800}.setting-action:last-child{border:0}.setting-action.danger{color:var(--red)}

.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:74px;background:rgba(255,255,255,.97);border-top:1px solid #dbe3ec;display:flex;justify-content:center;z-index:30;backdrop-filter:blur(12px)}
.bottom-item{width:min(160px,20vw);border:0;background:transparent;color:#7b8794;padding:8px 4px 7px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px}.bottom-item span{font-size:19px;line-height:1}.bottom-item b{font-size:10px}.bottom-item.active{color:var(--blue)}.bottom-item.active span{transform:translateY(-1px)}

.session{position:fixed;inset:0;background:#f5f7fa;z-index:100;display:grid;grid-template-rows:70px 1fr 82px}
.session-header{background:#fff;border-bottom:1px solid var(--line);display:grid;grid-template-columns:48px minmax(0,680px) 48px;justify-content:center;align-items:center;gap:14px;padding:0 16px}.icon-btn{width:42px;height:42px;border-radius:12px;border:1px solid #d3dde7;background:#fff;font-size:24px;color:#4f5d6b}.icon-btn.star{font-size:26px}.icon-btn.star.active{color:#d59a00;background:#fff9e5}
.session-progress>div:first-child{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-bottom:7px}.session-progress b{color:var(--ink)}.progress-track{height:8px;background:#e8edf3;border-radius:999px;overflow:hidden}.progress-track i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--blue),var(--cyan));transition:.2s}
.session-main{width:min(780px,calc(100% - 34px));margin:0 auto;padding:30px 0 40px;overflow:auto}.question-meta{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:12px}.pill{display:inline-block;border-radius:999px;padding:6px 9px;background:var(--blue-soft);color:var(--blue);font-size:11px;font-weight:900}.exam-timer{margin-left:auto;font-weight:950;color:var(--blue);font-variant-numeric:tabular-nums}.session-main h2{font-size:24px;line-height:1.45;margin:18px 0 8px;letter-spacing:-.01em}.question-hint{color:var(--muted);font-size:13px;margin:0 0 18px}
.session-answers{display:grid;gap:9px}.answer-option{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid #d6dfe8;border-radius:13px;padding:14px 15px;cursor:pointer;transition:.12s}.answer-option:hover{border-color:#9bbce0;background:#fafdff}.answer-option input{margin-top:3px;transform:scale(1.15);accent-color:var(--blue)}.answer-option b{margin-right:4px}.answer-option.correct{background:var(--green-soft);border-color:#94ceb0}.answer-option.wrong{background:var(--red-soft);border-color:#e4a09c}.answer-option.missed{background:var(--yellow-soft);border-color:#e2c46b}
.session-feedback{margin-top:15px;border-radius:12px;padding:14px 15px;font-weight:800}.session-feedback.ok{background:var(--green-soft);color:var(--green)}.session-feedback.bad{background:var(--red-soft);color:var(--red)}.session-source{font-size:11px;color:var(--muted);margin-top:13px;padding-top:12px;border-top:1px dashed #d5dce4}
.session-footer{background:#fff;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:10px;padding:13px max(18px,calc((100vw - 780px)/2))}.session-footer .btn{min-width:130px}
.summary-overlay{position:fixed;inset:0;background:rgba(16,33,50,.55);z-index:120;display:grid;place-items:center;padding:20px}.summary-card{width:min(480px,100%);background:#fff;border-radius:24px;padding:30px;text-align:center;box-shadow:0 30px 80px rgba(10,30,50,.25)}.summary-icon{width:64px;height:64px;border-radius:50%;display:grid;place-items:center;margin:0 auto 14px;background:var(--green-soft);color:var(--green);font-size:30px;font-weight:950}.summary-card h2{font-size:28px;margin:7px 0}.summary-card p{color:var(--muted);line-height:1.5}.summary-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin:18px 0}.summary-stats div{background:#f4f7fa;border-radius:12px;padding:12px}.summary-stats strong{display:block;font-size:22px}.summary-stats span{font-size:10px;color:var(--muted);text-transform:uppercase;font-weight:900}.summary-card .btn{width:100%}

#toast{position:fixed;right:18px;top:18px;z-index:200;background:#172433;color:#fff;border-radius:11px;padding:12px 15px;box-shadow:0 12px 30px #11223330;opacity:0;transform:translateY(-8px);pointer-events:none;transition:.18s;max-width:min(430px,90vw);font-size:13px}#toast.show{opacity:1;transform:none}

@media(max-width:850px){
  .auth-shell{grid-template-columns:1fr}.auth-brand{min-height:45vh;padding:38px 25px}.auth-brand h1{font-size:48px}.auth-card{margin:28px auto}
  .hero-card{align-items:flex-start}.readiness-wrap{min-width:155px}.readiness-ring{width:122px;height:122px}
  .practice-grid{grid-template-columns:repeat(2,1fr)}.hf-practice-grid{grid-template-columns:repeat(2,1fr)}.success-grid{grid-template-columns:repeat(2,1fr)}
  .exam-hero{grid-template-columns:1fr}.path-levels{grid-template-columns:1fr 1fr 1fr}
}
@media(max-width:620px){
  .app-main{padding:18px 14px 40px}.header-inner{padding:0 14px}.readiness-chip{display:none}
  .hero-card{padding:22px;display:block}.hero-copy h2{font-size:28px}.readiness-wrap{display:flex;align-items:center;gap:12px;text-align:left;margin-top:25px}.readiness-ring{width:92px;height:92px;margin:0}.readiness-ring strong{font-size:24px}.traffic{justify-content:flex-start;margin:3px 0}.quick-stats div{padding:13px}.quick-stats strong{font-size:18px}.quick-stats span{font-size:10px}
  .section-heading{align-items:flex-start}.legend{display:none}.path-levels{grid-template-columns:1fr}.path-level{min-height:95px}.practice-grid{grid-template-columns:1fr 1fr;gap:9px}.practice-card{min-height:128px;padding:15px}.practice-icon{margin-bottom:12px}.hf-practice-grid{grid-template-columns:1fr 1fr}.success-grid{grid-template-columns:1fr 1fr}.success-card{padding:16px}.success-card strong{font-size:25px}
  .page-head h2{font-size:31px}.exam-main,.exam-note{padding:20px}.exam-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.exam-facts span{padding:9px;text-align:center;font-size:11px}.exam-facts b{display:block;font-size:18px}
  .history-row{grid-template-columns:1fr auto}.history-row .badge-pass{grid-column:2;grid-row:1 / 3}
  .bottom-nav{height:68px}.bottom-item{width:20%}.bottom-item span{font-size:18px}
  .session{grid-template-rows:62px 1fr 74px}.session-header{grid-template-columns:42px 1fr 42px;padding:0 10px;gap:8px}.session-main{width:calc(100% - 28px);padding-top:22px}.session-main h2{font-size:20px}.session-footer{padding:11px 14px}.session-footer .btn{min-width:110px}.answer-option{padding:13px}
}