:root{--bg:#f5f6f2;--ink:#182e27;--muted:#6e7e75;--line:#e2e8df;--green:#226647;--mint:#b7d9a9;--white:#fff;--radius:18px;font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-size:14px}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,.button{border:1px solid var(--line);background:white;color:var(--ink);border-radius:9px;padding:11px 16px;cursor:pointer;text-decoration:none;display:inline-block}button:hover,.button:hover{border-color:var(--green);background:#f0f5ec}button:disabled{opacity:.5;cursor:default}.primary{background:var(--green);color:white;border-color:var(--green)}.primary:hover{background:#174f35;color:white}.quiet{border:0;background:none;padding-left:0;color:var(--muted)}input,textarea,select{border:1px solid var(--line);border-radius:8px;background:#fbfcf9;padding:11px 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button:nth-child(3),.grades button:nth-child(4){background:#ebf3e4}.history-item{border-bottom:1px solid var(--line);padding:15px 0}#notice{position:sticky;top:12px;z-index:3;border:1px solid #b4cc9f;background:#edf5e5;padding:14px 20px;border-radius:12px;margin-bottom:20px;box-shadow:0 5px 20px #203c1810}#notice.error{border-color:#d3ae9d;background:#fff1e8;color:#8c3b23}.error{color:#a64631}.login-page{min-height:100vh;display:grid;place-items:center;padding:25px;background:radial-gradient(ellipse at 20% 0%,#e3edda,transparent 70%),var(--bg)}.login-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:45px;max-width:460px;width:100%;box-shadow:0 20px 80px #35501e0a}.login-card h1{font-size:34px}.login-card p{font-size:13px;color:var(--muted)}.login-card button{width:100%;margin:10px 0 30px}.login-card 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h1{font-size:28px}.stats{grid-template-columns:repeat(2,1fr)}.dashboard-grid,.settings-grid{grid-template-columns:1fr}.toolbar{flex-wrap:wrap}.toolbar>input{max-width:none;flex-basis:100%}.stat small{font-size:10px}.panel-title>span{font-size:10px}.login-card{padding:30px}.grades{grid-template-columns:repeat(2,1fr)}dialog{padding:22px}.recent-text strong{max-width:260px}}