:root{--brand:#635bff;--accent:#14b8a6;--ink:#172033;--muted:#687386;--line:#e8ebf0;--bg:#f6f7fb;--card:#fff;--danger:#b42318;--warning:#9a6700;--radius:18px}*{box-sizing:border-box}body{margin:0;font:15px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg)}a{color:var(--brand);text-decoration:none}button,.button{border:0;border-radius:11px;background:var(--brand);color:#fff;padding:.78rem 1.1rem;font-weight:700;cursor:pointer;display:inline-flex;justify-content:center;align-items:center}button:hover,.button:hover{filter:brightness(.94)}.secondary{background:#eef0ff;color:var(--brand)}.small{padding:.45rem .7rem;font-size:.8rem}.shell{display:grid;grid-template-columns:250px 1fr;min-height:100vh}aside{position:sticky;top:0;height:100vh;background:#11172a;color:#fff;padding:1.5rem;display:flex;flex-direction:column}.brand{font-size:1.1rem;font-weight:850;color:inherit;letter-spacing:-.03em}aside nav{display:grid;gap:.25rem;margin:2rem 0}aside nav a{color:#aeb7ca;padding:.68rem .8rem;border-radius:10px}aside nav a:hover,aside nav a.active{color:#fff;background:#252d44}.logout{margin-top:auto;color:#aeb7ca}main{min-width:0}header{height:74px;background:#fff;border-bottom:1px solid var(--line);display:flex;justify-content:flex-end;align-items:center;padding:0 2.2rem}header>div{display:grid;text-align:right}header small,.stat small,td small,.lesson small{display:block;color:var(--muted)}.menu{display:none;margin-right:auto;padding:.5rem}.content{padding:2.2rem;max-width:1500px;margin:auto}.page-title{display:flex;align-items:end;justify-content:space-between;margin-bottom:1.4rem}.page-title h1,h1{font-size:clamp(1.8rem,3vw,3rem);line-height:1.05;letter-spacing:-.045em;margin:.3rem 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#635bff20}textarea{min-height:100px;resize:vertical}.check{display:flex;align-items:center;gap:.5rem}.check input{width:auto}details summary{cursor:pointer;font-weight:800}.form-panel summary{margin-bottom:1rem}.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}table{border-collapse:collapse;width:100%;min-width:680px}th,td{text-align:left;padding:.9rem 1rem;border-bottom:1px solid var(--line);vertical-align:middle}th{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.badge{display:inline-flex;background:#eef0ff;color:var(--brand);border-radius:999px;padding:.25rem .55rem;font-size:.75rem;font-weight:800}.empty{text-align:center;color:var(--muted);padding:3rem}.alert{max-width:1100px;margin:1rem auto;padding:.85rem 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35%),var(--bg)}.auth>.brand{position:absolute;top:1.5rem;left:2rem}.auth-card{width:min(100%,460px);background:#fff;padding:2rem;border:1px solid var(--line);border-radius:24px;box-shadow:0 30px 80px rgba(25,30,55,.12)}.auth.wide .auth-card{width:min(100%,850px)}.auth form{display:grid;gap:1rem;margin:1.5rem 0}.muted{color:var(--muted)}.center{text-align:center}.seal{display:grid;place-items:center;width:70px;height:70px;border-radius:50%;background:#dcfae6;color:#087443;font-size:2rem;margin:0 auto 1rem}.landing{background:#fff}.landing nav,.landing-section,.hero,.landing footer{width:min(1120px,calc(100% - 2rem));margin:auto}.landing nav{height:80px;display:flex;justify-content:space-between;align-items:center}.hero{min-height:520px;display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:3rem}.hero h1{font-size:clamp(2.8rem,7vw,5.5rem)}.hero p{font-size:1.15rem;color:var(--muted);max-width:650px}.hero-art{min-height:340px;border-radius:35% 65% 55% 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@media(max-width:800px){.shell{display:block}aside{position:fixed;z-index:10;width:260px;transform:translateX(-100%);transition:.2s}aside.open{transform:none}.menu{display:block}.content{padding:1rem}header{padding:0 1rem}.grid.two,.grid.three,.hero{grid-template-columns:1fr}.hero{padding:3rem 0}.hero-art{min-height:220px}.stats{grid-template-columns:repeat(2,1fr)}.inline-form{flex-wrap:wrap}.auth{padding:4.5rem 1rem 1rem}.auth-card{padding:1.4rem}table{min-width:620px}}
@media(max-width:440px){.stats{grid-template-columns:1fr}.page-title{align-items:start}.hero h1{font-size:2.7rem}}
.card-head,.card-actions{display:flex;align-items:center;gap:.55rem;flex-wrap:wrap}.card-head{justify-content:space-between}.card-actions{margin-top:1.2rem}.card-actions form{margin:0}.badge.success{background:#dcfae6;color:#087443}.plan-price{display:flex;align-items:baseline;gap:.35rem;margin:1.1rem 0}.plan-price strong{font-size:1.8rem}.clean-list{list-style:none;padding:0;margin:1rem 0;color:var(--muted)}.clean-list li{padding:.35rem 0;border-bottom:1px solid var(--line)}code{background:#f0f2f6;border-radius:6px;padding:.15rem .35rem}