:root{--ink:#143b38;--muted:#71807b;--paper:#f4f2ec;--card:#fffefa;--line:#dcdad2;--teal:#174e4a;--copper:#b9683f;--shadow:0 24px 72px rgba(22,57,53,.14)}
*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 18% 18%,#e1ede9,transparent 34%),var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif}
.login-shell{width:min(980px,calc(100% - 32px));min-height:100vh;margin:auto;display:grid;align-content:center;gap:28px;padding:32px 0}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}.brand span{display:grid;place-items:center;width:38px;height:38px;background:var(--teal);color:white;font-family:serif;font-size:22px}.brand strong{letter-spacing:.1em}
.login-card{width:min(520px,100%);padding:44px;background:var(--card);box-shadow:var(--shadow);border:1px solid rgba(220,218,210,.8)}.eyebrow{color:var(--copper);font-size:11px;letter-spacing:.14em}.login-card h1{margin:9px 0 14px;font:600 34px/1.15 "Songti SC",serif}.login-card p{margin:0 0 26px;color:var(--muted);font-size:13px;line-height:1.8}.login-card form{display:grid;gap:9px}.login-card label{font-size:11px;color:var(--muted)}.login-card input{width:100%;padding:13px;border:1px solid var(--line);background:white;outline:none}.login-card input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(23,78,74,.08)}.login-card button{margin-top:5px;padding:13px;border:0;background:var(--teal);color:white;cursor:pointer}.login-card button:disabled{opacity:.65;cursor:wait}#registration-fields{display:grid;gap:8px;margin-top:5px;padding:12px;background:#f5f2eb;border:1px solid var(--line)}#registration-fields small{color:var(--muted);font-size:10px;line-height:1.5}#login-error{display:block;min-height:20px;margin-top:10px;color:#a84b42}.text-button{padding:0!important;margin-top:4px!important;border:0!important;background:transparent!important;color:var(--teal)!important;text-align:left;font-size:12px!important}.back{display:inline-block;margin-top:17px;color:var(--teal);font-size:12px;text-decoration:none}
@media(max-width:560px){.login-card{padding:32px 22px}.login-card h1{font-size:29px}}