:root{--magenta:#e50071;--magenta-dark:#bd005d;--blue:#009fe3;--ink:#151515;--muted:#666;--line:#e7e7e7;--surface:#f6f6f7;--success:#18864b;--danger:#c92d3a;--shadow:0 18px 50px rgba(18,18,18,.09)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font-family:Inter,Arial,sans-serif;line-height:1.55}.site-header{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1240px)/2));border-bottom:1px solid var(--line);background:#fff;position:relative;z-index:2}.brand{text-decoration:none;color:var(--ink);font-size:23px;font-weight:800;letter-spacing:-1.2px}.brand-mark{font-weight:500}.brand-dot{color:var(--magenta)}.brand-bit{color:var(--magenta)}.header-user{display:flex;align-items:center;gap:18px;font-size:13px}.header-user form{margin:0}.link-button{border:0;background:transparent;color:var(--magenta);font:inherit;font-weight:600;cursor:pointer;padding:6px}.page-shell{width:min(1180px,calc(100% - 40px));min-height:calc(100vh - 150px);margin:0 auto;padding:64px 0 80px}.page-shell.centered{display:grid;place-items:center}.page-shell.narrow{width:min(760px,calc(100% - 40px))}.page-shell.wide{width:min(1380px,calc(100% - 40px))}.page-shell.test-shell{width:min(820px,calc(100% - 32px));display:grid;place-items:center}footer{height:72px;border-top:1px solid var(--line);display:grid;place-items:center;color:#999;font-size:12px}.eyebrow{color:var(--magenta);text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:800;margin-bottom:10px}h1,h2,h3{line-height:1.12;letter-spacing:-.035em}h1{font-size:clamp(36px,5vw,64px);margin:0 0 24px}h2{font-size:32px}p{color:#444}.button{display:inline-flex;justify-content:center;align-items:center;min-height:48px;padding:0 22px;border-radius:4px;border:1px solid transparent;text-decoration:none;font:inherit;font-weight:700;cursor:pointer;transition:.2s}.button.primary{background:var(--magenta);color:#fff}.button.primary:hover{background:var(--magenta-dark)}.button.secondary{background:#fff;color:var(--ink);border-color:#ccc}.button.large{min-height:58px;padding:0 32px}.button[disabled]{background:#bbb;cursor:not-allowed}.back-link{display:inline-flex;margin-bottom:34px;color:var(--ink);text-decoration:none;font-weight:700}.auth-card,.result-card{width:min(520px,100%);padding:52px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}.auth-card h1{font-size:42px}.auth-card p{font-size:17px;margin-bottom:30px}.stack-form{display:grid;gap:12px}.stack-form label{font-size:13px;font-weight:700}.stack-form input,.filters input,.filters select{height:52px;border:1px solid #cfcfd2;border-radius:4px;padding:0 15px;font:inherit;background:#fff}.stack-form input:focus,.filters input:focus,.filters select:focus{outline:3px solid rgba(229,0,113,.13);border-color:var(--magenta)}.status-icon{width:68px;height:68px;border-radius:50%;display:grid;place-items:center;background:var(--magenta);color:white;font-size:35px;font-weight:800;margin-bottom:24px}.success-card .status-icon,.result-card.passed .status-icon{background:var(--success)}.hero{padding:22px 0 54px;max-width:900px}.hero h1{margin-bottom:18px}.hero p{font-size:22px;max-width:780px}.dashboard-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.dashboard-card{min-height:330px;padding:34px;display:flex;flex-direction:column;color:#fff;text-decoration:none;position:relative;overflow:hidden;transition:transform .2s}.dashboard-card:hover{transform:translateY(-4px)}.dashboard-card.magenta{background:var(--magenta)}.dashboard-card.blue{background:var(--blue)}.dashboard-card.dark{background:#222}.dashboard-card h2{margin:42px 0 10px}.dashboard-card p{color:rgba(255,255,255,.85)}.card-number{font-size:12px;font-weight:800;letter-spacing:.1em}.card-link{margin-top:auto;font-weight:700}.page-actions{display:flex;justify-content:space-between;align-items:center}.learning-badge{font-size:12px;color:#666;background:var(--surface);padding:8px 12px;border-radius:20px}.learning-shell{width:min(940px,calc(100% - 40px))}.learning-article{font-size:17px}.learning-article>h1{font-size:clamp(38px,6vw,62px);margin:32px 0}.learning-article .lead{font-size:20px;color:#777;margin-bottom:60px}.learning-article h2{font-size:35px;margin:70px 0 24px;padding-top:20px;border-top:5px solid var(--magenta)}.learning-article h3{font-size:24px;margin-top:40px}.learning-article p{max-width:820px}.learning-article .numbered{padding-left:18px;border-left:3px solid var(--blue)}.learning-article figure{margin:42px 0}.learning-article img{display:block;width:100%;height:auto;border:1px solid var(--line)}.bottom-actions{margin-top:60px;padding-top:30px;border-top:1px solid var(--line)}.rules-card{border:1px solid var(--line);padding:46px;box-shadow:var(--shadow)}.rules-card h1{font-size:46px}.rules-list{display:grid;gap:16px;margin:30px 0 38px;padding-left:22px}.rules-list li::marker{color:var(--magenta);font-weight:800}.notice{padding:18px 20px;margin:24px 0;background:#fff6dc;border-left:4px solid #efa900}.notice p{margin:5px 0}.test-card{width:100%;padding:38px;border:1px solid var(--line);box-shadow:var(--shadow)}.test-topline{display:flex;justify-content:space-between;align-items:center}.test-topline>div:first-child{display:grid}.timer{font-size:30px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--magenta)}.progress-track{height:6px;background:#eee;margin:22px 0 46px}.progress-track span{display:block;height:100%;background:var(--magenta);transition:width .3s}.question-title{font-size:28px;margin:0 0 28px}.options{display:grid;gap:12px}.option{display:flex;gap:14px;align-items:flex-start;padding:18px;border:1px solid #ccc;border-radius:4px;cursor:pointer;transition:.15s}.option:hover,.option:has(input:checked){border-color:var(--magenta);background:#fff5fa}.option input{margin-top:5px;accent-color:var(--magenta)}.test-actions{display:flex;justify-content:flex-end;margin-top:28px}.form-error{color:var(--danger);font-weight:600;margin-top:16px}.result-card{text-align:center}.result-card .status-icon{margin-left:auto;margin-right:auto}.result-card h1{font-size:54px}.score{font-size:74px;font-weight:800;color:var(--magenta);line-height:1}.score span{font-size:18px;color:#777}.result-card p{font-size:17px}.button-row{display:flex;gap:10px;justify-content:center;margin-top:32px;flex-wrap:wrap}.section-heading{display:flex;justify-content:space-between}.filters{display:grid;grid-template-columns:2fr 1fr 1fr auto;gap:10px;margin:20px 0 28px}.table-wrap{overflow:auto;border:1px solid var(--line)}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:15px;border-bottom:1px solid var(--line);vertical-align:top}th{font-size:11px;text-transform:uppercase;letter-spacing:.06em;background:#f7f7f8;white-space:nowrap}td a{color:var(--ink);text-decoration:none}td small{display:block;color:#777;margin-top:4px}.empty{text-align:center;color:#999;padding:40px}.pagination{display:flex;justify-content:center;gap:24px;margin-top:24px}.pagination a{color:var(--magenta);font-weight:700;text-decoration:none}.person-heading{padding:20px 0 30px}.person-heading h1{font-size:48px;margin-bottom:10px}.attempt-list{display:grid;gap:12px}.attempt-detail{border:1px solid var(--line)}.attempt-detail summary{display:grid;grid-template-columns:1.3fr 1fr .5fr .7fr;gap:12px;padding:18px;cursor:pointer;align-items:center}.status.passed{color:var(--success)}.status:not(.passed){color:var(--danger)}.answer-list{padding:0 18px 18px}.answer-row{padding:14px;border-top:1px solid var(--line);display:grid;gap:5px}.answer-row span{color:#666}.answer-row.correct{border-left:4px solid var(--success)}.answer-row.wrong{border-left:4px solid var(--danger)}
.learning-article ul,.learning-article ol{max-width:820px;margin:20px 0 28px;padding-left:28px}.learning-article li{padding-left:4px;margin:9px 0;color:#444}.learning-article li::marker{color:var(--magenta);font-weight:800}.learning-article img{width:auto;max-width:100%;margin-left:auto;margin-right:auto}
@media(max-width:900px){.dashboard-grid{grid-template-columns:1fr}.dashboard-card{min-height:250px}.filters{grid-template-columns:1fr 1fr}.dashboard-card h2{margin-top:20px}}
@media(max-width:640px){.site-header{height:66px;padding:0 16px}.header-user>span{display:none}.page-shell{width:calc(100% - 28px);padding:36px 0 60px}.auth-card,.result-card,.rules-card,.test-card{padding:26px 20px}.auth-card h1,.rules-card h1{font-size:34px}.hero p{font-size:18px}.dashboard-card{padding:25px}.learning-badge{display:none}.learning-article{font-size:16px}.learning-article h2{font-size:28px}.test-topline{align-items:flex-start}.timer{font-size:25px}.question-title{font-size:23px}.filters{grid-template-columns:1fr}.attempt-detail summary{grid-template-columns:1fr 1fr}.button-row .button{width:100%}}