/* Standalone PHP sign-in inherits the reading desk's documented tokens. */
:root{--primary:#6650c8;--primary-hover:#5540b3;--ink:#25283c;--muted:#697084;--canvas:#f1f3f7;--surface:#fff;--line:#e4e7ef;--danger:#b23847;--scroll-thumb:#bfc4d2;--scroll-track:transparent;--scroll-hover:#929ab0;--scroll-active:#697084;color-scheme:light;font-family:"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--canvas);scrollbar-color:var(--scroll-thumb) var(--scroll-track);scrollbar-width:thin}
*{box-sizing:border-box}body{margin:0}.login-page{min-height:100svh;padding:clamp(24px,8vh,80px) 20px;display:grid;place-items:center}.login-panel{width:100%;max-width:440px;padding:clamp(24px,6vw,40px);background:var(--surface);border:1px solid var(--line);border-top:4px solid var(--primary);border-radius:10px}.login-brand{display:flex;align-items:center;gap:12px;font-size:26px;font-weight:700}.login-brand small{display:block;font-size:10px;letter-spacing:3px;color:var(--muted);margin-top:3px}h1{font-size:25px;line-height:1.35;margin:32px 0 8px}.login-description{color:var(--muted);font-size:16px;line-height:1.7;margin:0 0 24px}label{display:block;font-size:14px;font-weight:600;margin:20px 0 8px}input{font:inherit;width:100%;min-height:48px;border:1px solid var(--line);border-radius:10px;padding:11px 14px;background:var(--surface);color:var(--ink);font-size:16px}input[aria-invalid=true]{border-color:var(--danger)}.password-field{position:relative}.password-field input{padding-right:72px}button{font:inherit;cursor:pointer;transition:background-color 140ms,color 140ms}button:disabled{cursor:wait;opacity:.72}.password-field button{position:absolute;right:5px;top:3px;min-width:58px;min-height:42px;background:transparent;border:0;color:var(--primary);border-radius:8px;font-size:14px}.password-field button:hover{background:var(--canvas)}.password-field button:active{background:var(--line)}input:focus-visible,button:focus-visible{outline:3px solid var(--primary);outline-offset:3px}.login-error{min-height:48px;color:var(--danger);font-size:14px;line-height:1.6;margin:12px 0}.login-submit{width:100%;height:48px;border:0;border-radius:10px;background:var(--primary);color:#fff;font-weight:600}.login-submit:hover{background:var(--primary-hover)}.login-submit:active{transform:translateY(1px)}.login-help{font-size:14px;line-height:1.7;color:var(--muted);margin:24px 0 0}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-thumb{background:var(--scroll-thumb);border-radius:8px}::-webkit-scrollbar-thumb:hover{background:var(--scroll-hover)}::-webkit-scrollbar-thumb:active{background:var(--scroll-active)}@media(prefers-reduced-motion:reduce){*{transition:none!important}}@media(forced-colors:active){:root{scrollbar-color:auto}.login-panel{border:1px solid CanvasText}button{border:1px solid ButtonText}}
.field-help{font-size:13px;line-height:1.6;color:var(--muted);margin:8px 0 0}.login-help a{color:var(--primary);text-underline-offset:4px;border-radius:3px}.login-help a:hover{color:var(--primary-hover)}a:focus-visible{outline:3px solid var(--primary);outline-offset:3px}