:root{--ink:#153b38;--muted:#647975;--accent:#087f72;--bg:#f4f7f5;--line:#dbe6e1}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,sans-serif}header{background:#fff;border-bottom:1px solid var(--line);padding:18px 4vw;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.logo{font-weight:750;color:var(--ink);font-size:21px;display:flex;gap:10px;align-items:center}.symbol{display:inline-grid;place-items:center;background:var(--accent);color:white;border-radius:9px;width:32px;height:32px}nav{display:flex;gap:18px;align-items:center;flex-wrap:wrap}main{max-width:1080px;padding:32px 24px 80px;margin:auto}h1{font-size:clamp(26px,4vw,38px);line-height:1.2;margin:16px 0 24px;letter-spacing:-.03em}h2{font-size:21px;margin:8px 0}h3{font-size:17px}.heading,.actions{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.actions{justify-content:flex-start}.card{background:white;border:1px solid var(--line);border-radius:14px;padding:24px;margin:16px 0}.muted,small{color:var(--muted)}.eyebrow{font-size:12px;letter-spacing:.13em;font-weight:700;color:var(--accent)}.hero{padding:56px 0;max-width:800px}.hero h1{font-size:clamp(38px,6vw,64px);max-width:720px}.intro{font-size:20px;max-width:640px;color:var(--muted)}button,.button{font:inherit;font-weight:600;display:inline-block;border:0;border-radius:9px;padding:10px 18px;color:white;background:var(--accent);cursor:pointer}.secondary{background:#e5f1eb;color:var(--ink)}button:disabled{opacity:.6;cursor:wait}input,select,textarea{font:inherit;border:1px solid #b9cdc5;border-radius:7px;padding:10px;background:white;max-width:100%;color:var(--ink)}input:not([type=checkbox]):not([type=radio]),textarea,select{width:100%}input[type=checkbox]{width:18px;height:18px;vertical-align:middle}textarea{min-height:85px}select[multiple]{min-height:110px}.field{margin:0 0 22px}.field>label{display:flex;align-items:center;gap:8px;margin-bottom:7px;font-weight:600}.narrow{max-width:660px;margin:auto}.week{display:flex;align-items:center;gap:12px;max-width:300px}.week>a{font-size:28px;padding:0 8px}.week input{width:auto}.row{padding:14px 0;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:15px;color:var(--ink)}.row:last-child{border:0}.row p{margin:4px 0}.lesson{display:flex;align-items:center;gap:24px;color:var(--ink)}.lesson .date{min-width:160px}.lesson .date strong{display:block}.lesson>span{margin-left:auto;font-size:24px}.lesson p{margin:4px 0}.cancelled{opacity:.65}.student-mark{background:white;color:var(--ink);width:100%;display:flex;justify-content:space-between;text-align:left;gap:15px;border:1px solid var(--line);padding:18px;margin:10px 0;font-weight:500}.mark-label{color:var(--muted);font-size:14px}.present{background:#e6f6ed;border-color:#9fcdb6}.present .mark-label{color:#13613c;font-weight:700}.last-mark{outline:3px solid #267a70;outline-offset:2px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.stats strong{display:block;font-size:32px}.search{display:flex;gap:12px;max-width:500px}.errorlist{color:#a92e24;list-style:none;padding:0}.message{padding:14px 18px;background:#e5f3e9;border-radius:8px}.message.error{background:#fbe8e5;color:#8b281e}.info{position:relative;display:inline-flex;align-items:center;justify-content:center;flex:none;width:17px;height:17px;border:1px solid #9eafa9;border-radius:50%;font-size:12px;font-style:normal;font-weight:500;cursor:help}.info>span{display:none;position:absolute;z-index:5;top:25px;left:-100px;min-width:250px;max-width:300px;padding:14px;background:#153b38;color:white;border-radius:8px;font:14px/1.5 system-ui}.info:focus>span,.info:hover>span{display:block}.danger{margin-top:40px;color:#8b281e}.account{position:relative}.account summary{cursor:pointer}.account[open]{background:white;z-index:10}.account form{margin-top:8px}footer{text-align:center;color:var(--muted);font-size:13px;padding:22px}.empty{padding:40px;text-align:center}:focus-visible{outline:3px solid #e6aa3b;outline-offset:3px}@media(max-width:650px){header{padding:15px 18px}nav{gap:13px;font-size:14px}main{padding:22px 16px 60px}.card{padding:18px}.lesson{gap:12px}.lesson .date{min-width:95px;font-size:13px}.lesson h2{font-size:17px}.stats{gap:8px}.stats .card{padding:12px;font-size:12px}.row{align-items:flex-start}.row>span:last-child{text-align:right}.heading h1{margin-bottom:15px}.mark-label{white-space:nowrap}}