/* Original product form. Small CSS-only pattern; no third-party visual assets. */
:root[data-client-variant] .auth-dialog{width:min(460px,100%);border:1px solid var(--ref-line);border-radius:8px;background:var(--ref-panel);color:var(--ref-text);overflow:auto;overscroll-behavior:contain;max-height:calc(100dvh - 32px)}
:root[data-client-variant] .auth-content{position:relative;padding:30px 32px 24px;background-color:var(--ref-panel);background-image:linear-gradient(135deg,transparent 47%,color-mix(in srgb,var(--ref-accent-ink) 11%,transparent) 49%,transparent 51%);background-size:32px 32px;max-width:100%;min-height:0}
:root[data-client-variant=wechat] .auth-content{background-image:linear-gradient(color-mix(in srgb,var(--ref-accent-ink) 8%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--ref-accent-ink) 8%,transparent) 1px,transparent 1px);background-size:28px 28px}
:root[data-client-variant] .auth-app-identity{display:flex;align-items:center;justify-content:flex-start;gap:12px;margin:0 0 24px;flex-direction:row;text-align:left}
:root[data-client-variant] .auth-app-symbol{width:44px;height:44px;border-radius:8px;margin:0;background:var(--ref-action);color:var(--ref-on-action);display:flex;align-items:center;justify-content:center}
:root[data-client-variant] .auth-app-symbol svg{width:30px;height:30px}
:root[data-client-variant] .auth-app-name{font-size:16px;font-weight:650;margin:0}
:root[data-client-variant] #authTitle{text-align:left;font-size:25px;line-height:1.4;font-weight:650;margin:0 0 6px}
:root[data-client-variant] .auth-subtitle{text-align:left;font-size:14px;margin-bottom:20px;color:var(--ref-secondary)}
:root[data-client-variant] #authForm{background:color-mix(in srgb,var(--ref-panel) 96%,transparent);border-radius:6px;padding:16px;margin:0 -16px}
:root[data-client-variant] #authForm label{font-size:14px;color:var(--ref-text);display:flex;flex-direction:column;gap:7px;margin:0 0 15px}
:root[data-client-variant] #authForm input,:root[data-client-variant] #authForm select{min-width:0;width:100%;min-height:44px;font-size:16px;border:1px solid var(--ref-line);border-radius:6px;padding:10px 12px;background:var(--ref-field);color:var(--ref-text);box-sizing:border-box;box-shadow:none}
:root[data-client-variant] #authForm input:focus,:root[data-client-variant] #authForm select:focus{border-width:1px;border-color:var(--ref-accent-ink);padding:10px 12px;outline:0;box-shadow:none}
:root[data-client-variant] #authForm :focus-visible,:root[data-client-variant] .auth-dialog button:focus-visible{outline:1px solid var(--ref-focus);outline-offset:2px}
:root[data-client-variant] .auth-phone{display:grid;grid-template-columns:minmax(98px,.9fr) minmax(0,1.6fr);gap:10px}
:root[data-client-variant] .auth-sms{display:flex;gap:8px;align-items:stretch}
:root[data-client-variant] .auth-sms input{flex:1;width:0}
:root[data-client-variant] .auth-sms button{flex:none;padding:8px 12px;min-height:44px;font-size:14px;border-radius:6px;background:var(--ref-selected);color:var(--ref-accent-ink);border:1px solid var(--ref-line)}
:root[data-client-variant] .auth-sms button:disabled{color:var(--ref-secondary);background:var(--ref-field)}
:root[data-client-variant] #authForm .auth-agreement{flex-direction:row;align-items:flex-start;gap:9px;font-size:12px;line-height:1.7}
:root[data-client-variant] #authForm .auth-agreement input{appearance:auto;width:18px;min-height:18px;height:18px;margin:3px 0;accent-color:var(--ref-accent-ink)}
:root[data-client-variant] .auth-agreement button{background:transparent;color:var(--ref-accent-ink);padding:0 3px;font-size:12px;text-decoration:underline;text-underline-offset:3px}
:root[data-client-variant] .auth-field-help{font-size:12px;line-height:1.6;margin:0 0 12px;color:var(--ref-secondary)}
:root[data-client-variant] .auth-submit{width:100%;max-width:none;margin:8px 0 0;min-height:46px;border-radius:6px;letter-spacing:0;background:var(--ref-action);color:var(--ref-on-action)}
:root[data-client-variant] .auth-footnote{font-size:12px;line-height:1.6;margin-top:18px;color:var(--ref-secondary)}
:root[data-client-variant] .auth-dialog [hidden]{display:none!important}
:root[data-client-variant] .auth-agreement-details{padding:22px;max-width:min(480px,94vw);line-height:1.8}
@media(max-width:740px){:root[data-client-variant] .auth-dialog{width:100%;height:100dvh;max-height:100dvh;margin:0;border:0;border-radius:0}:root[data-client-variant] .auth-content{min-height:100%;padding:max(28px,env(safe-area-inset-top)) max(24px,env(safe-area-inset-right)) max(24px,env(safe-area-inset-bottom)) max(24px,env(safe-area-inset-left))}}
@media(max-height:500px){:root[data-client-variant] .auth-content{padding-top:max(16px,env(safe-area-inset-top))}:root[data-client-variant] .auth-app-identity{margin-bottom:12px}:root[data-client-variant] .auth-dialog{max-height:100dvh}}

/* SMS capability is a real server state; keep unavailable registration clear. */
.auth-content #smsStatus[data-state=unavailable]{display:block;margin-top:10px;padding:10px 12px;border:1px solid #b88738;border-radius:4px;background:#fff5df;color:#62400e;font-size:14px;font-weight:600;line-height:1.5}
:root[data-theme=dark] .auth-content #smsStatus[data-state=unavailable]{background:#3c301d;color:#ffe1a7;border-color:#bd9655}
.auth-content #smsStatus[data-state=error]{color:#b02d33}
.registration-welcome{width:min(440px,calc(100vw - 28px));max-height:calc(100dvh - 40px);overflow:auto;box-sizing:border-box;padding:24px;border:0;border-radius:6px;background:var(--ref-panel,#fff);color:var(--ref-text,#203448)}
.registration-welcome h2{font-size:22px;margin:0 0 16px}.registration-welcome p{line-height:1.7;overflow-wrap:anywhere}.registration-welcome button{font:inherit;min-height:44px;width:100%;margin-top:16px;border:0;border-radius:4px;padding:10px;background:var(--ref-action,#147a4b);color:var(--ref-on-action,#fff)}.registration-welcome::backdrop{background:rgb(0 0 0 / .3)}

/* The keyboard changes the visual viewport, not necessarily100dvh. */
:root:is([data-platform=ios],[data-platform=android]) .auth-dialog{inset:var(--dialog-viewport-offset-top,0px) 0 auto;height:var(--dialog-viewport-height,100dvh);max-height:var(--dialog-viewport-height,100dvh);scroll-padding-block:12px max(20px,env(safe-area-inset-bottom));overflow-anchor:none}
:root[data-client-variant] .auth-dialog[data-keyboard-open=true] .auth-content{padding-top:max(12px,env(safe-area-inset-top))}
:root[data-client-variant] .auth-dialog[data-keyboard-open=true] .auth-app-identity{margin-bottom:10px}
:root[data-client-variant] .auth-dialog[data-keyboard-open=true] .auth-app-symbol{width:28px;height:28px}
:root[data-client-variant] .auth-dialog[data-keyboard-open=true] .auth-app-symbol svg{width:22px;height:22px}
:root[data-client-variant] .auth-dialog[data-keyboard-open=true] #authTitle{font-size:21px}
:root[data-client-variant] .auth-dialog[data-keyboard-open=true] .auth-subtitle{margin-bottom:12px}

/* Keep the auth tabs as legible as the native form, including desktop scaling. */
:root[data-client-variant] .auth-dialog .segmented-control>button{font-size:14px;line-height:1.5;min-height:40px;font-weight:500}
:root[data-client-variant] .auth-dialog .auth-agreement button{font-size:13px;color:var(--ref-accent-ink);text-underline-offset:3px}