:root{color-scheme:light;--page:#f5f8f7;--surface:#fff;--ink:#203c35;--muted:#53665f;--line:#cedbd6;--accent:#0f766e;--on-accent:#fff;--danger:#a6342a;--tint:#edf7f2}
:root.theme-dark{color-scheme:dark;--page:#101816;--surface:#1b2622;--ink:#edf4f1;--muted:#b7c8bf;--line:#4b6257;--accent:#55d7bf;--on-accent:#08251e;--danger:#ffaaa0;--tint:#223a30}
*{box-sizing:border-box}body{margin:0;background:var(--page);color:var(--ink);font:400 16px/1.65 -apple-system,BlinkMacSystemFont,'Segoe UI','PingFang TC',sans-serif;-webkit-font-smoothing:antialiased}button,input{font:inherit}a{color:var(--accent);text-underline-offset:4px}button{cursor:pointer}button:disabled{cursor:wait;opacity:.55}[hidden]{display:none!important}.auth-shell{width:min(320px,calc(100% - 32px));margin:24px auto;padding-bottom:env(safe-area-inset-bottom)}body.register .auth-shell{width:min(360px,calc(100% - 32px))}.auth-top{display:flex;align-items:center;justify-content:space-between;margin:0 4px 16px}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-size:20px;font-weight:350;letter-spacing:.015em}.icon-button{width:44px;height:44px;display:grid;place-items:center;background:transparent;border:1px solid var(--line);border-radius:50%;color:var(--ink)}.auth-card{padding:22px;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:0 8px 30px #203c3505}form{display:grid;gap:12px}h1{font-size:24px;line-height:1.3;font-weight:400;letter-spacing:-.025em;margin:0}h2{font-size:18px;font-weight:500;margin:0 0 12px}p{margin:0}.eyebrow{font-size:12px;letter-spacing:.025em;color:var(--muted)}.muted{color:var(--muted);font-size:14px}#authIntro{margin-bottom:6px;font-size:16px}.field{display:grid;gap:6px}label{font-size:16px}input:not([type=checkbox]){width:100%;min-width:0;min-height:44px;border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:var(--surface);color:var(--ink)}input[aria-invalid=true]{border-color:var(--danger)}.password-wrap{position:relative}.password-wrap input{padding-right:64px}.reveal{position:absolute;right:3px;top:0;min-width:54px;min-height:44px;border:0;background:transparent;color:var(--accent);font-size:14px}.primary{min-height:44px;border:0;border-radius:10px;background:var(--accent);color:var(--on-accent);font-weight:500;width:100%;padding:10px 16px}.primary:hover{filter:brightness(.94)}.field-error,.message{color:var(--danger);font-size:14px;overflow-wrap:anywhere}.field-error:empty,.message:empty{display:none}.challenge-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.challenge-row img{max-width:100%;border:1px solid var(--line);border-radius:8px;background:#f4f9f7}.text-button{background:transparent;border:0;color:var(--accent);min-height:44px;padding:6px 0;text-decoration:underline;text-underline-offset:4px;font-size:14px}.auth-link,.switch-mode{text-align:center}.switch-mode{font-size:14px}.switch-mode a{display:inline-block;min-height:44px;padding:8px 3px}.rescue{text-align:center;border-top:1px solid var(--line);padding-top:8px}.rescue button{color:var(--muted);font-size:13px}#registrationPolicy{margin:4px 0;padding:12px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}#policyNotices{margin:0 0 14px;padding-left:21px;font-size:16px;color:var(--muted)}#policyNotices li+li{margin-top:6px}.consent{display:flex;gap:12px;align-items:flex-start;font-size:16px}.consent input{width:20px;height:20px;flex:none;margin:3px 0;accent-color:var(--accent)}.auth-footer{display:flex;flex-wrap:wrap;gap:6px 20px;justify-content:center;margin-top:18px}.auth-footer a{font-size:13px;min-height:44px;padding:10px 0;color:var(--muted)}:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.social{display:grid;gap:8px}.social a{display:flex;align-items:center;justify-content:center;gap:12px;min-height:44px;border:1px solid var(--line);border-radius:10px;text-decoration:none;font-size:15px}.social svg{width:20px;height:20px}.divider{text-align:center;color:var(--muted);font-size:14px}@media(min-width:700px){.auth-shell{margin-top:36px}}@media(max-width:420px){.auth-card{padding:20px 18px}.auth-shell{margin-top:20px}}