:root{color-scheme:dark;--bg:#0f1216;--panel:#171b21;--line:#2a313b;--text:#e6e9ee;--muted:#9aa4b2;--accent:#5b8cff;--danger:#f0616d}
*{box-sizing:border-box}
body{margin:0;background:radial-gradient(circle at top,#1d2635 0,var(--bg) 48%);color:var(--text);font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif}
.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px}
.login-card{width:min(100%,420px);padding:30px;border:1px solid var(--line);border-radius:16px;background:var(--panel);box-shadow:0 18px 50px rgba(0,0,0,.28)}
.login-brand{color:var(--accent);font-weight:700;letter-spacing:.3px}.login-card h1{margin:8px 0 4px;font-size:25px}.login-copy,.login-note{margin:0;color:var(--muted)}.login-copy{margin-bottom:22px}.login-note{margin-top:18px;font-size:12px}
.login-label{display:block;margin:0 0 7px;font-size:13px;font-weight:600}.login-input{width:100%;border:1px solid var(--line);border-radius:9px;background:#0c0f13;color:var(--text);padding:11px 12px;font:inherit;outline:none}.login-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 22%,transparent)}
.login-submit{width:100%;margin-top:14px;border:0;border-radius:9px;background:var(--accent);color:#fff;padding:11px 14px;font:600 14px inherit;cursor:pointer}.login-submit:hover{filter:brightness(1.08)}.login-submit:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 45%,white);outline-offset:2px}
.login-error{margin:0 0 16px;border:1px solid color-mix(in srgb,var(--danger) 55%,transparent);border-radius:9px;background:color-mix(in srgb,var(--danger) 12%,transparent);color:#ffb7bd;padding:9px 11px;font-size:13px}
@media(max-width:520px){.login-shell{padding:16px}.login-card{padding:24px 20px;border-radius:13px}}