/* Shared member authentication UI. Authentication is owned by each page's existing scripts. */
:root {
  color-scheme: dark;
  --gold: #d1bc82;
  --auth-bg: #101113;
  --auth-panel: #1a1b1e;
  --auth-line: #363830;
  --auth-text: #f3f1e9;
  --auth-muted: #b0b2a7;
}
* { box-sizing: border-box; }
body.auth-page {
  margin: 0;
  background: var(--auth-bg);
  color: var(--auth-text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-text-size-adjust: 100%;
}
.auth-page button, .auth-page input, .auth-page select { font: inherit; }
.auth-page button, .auth-page a, .auth-page summary { -webkit-tap-highlight-color: transparent; }
.auth-page a { color: var(--gold); text-underline-offset: 4px; }
.auth-page button { cursor: pointer; }
.auth-page button:disabled { cursor: wait; opacity: .6; }
.auth-page :is(a, button, input, select, summary):focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.auth-page #nav {
  width: min(1120px, 100%);
  min-height: 88px;
  margin: 0 auto;
  padding: max(16px, env(safe-area-inset-top)) 32px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.auth-page .nav-logo {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  gap: 5px;
  color: var(--auth-text);
  text-decoration: none;
  font: 600 25px/1 Georgia, serif;
  letter-spacing: 3px;
  white-space: nowrap;
}
.auth-page .dot { color: var(--gold); }
.auth-page .nav-logo-zh { color: var(--auth-muted); font: 14px/1.4 sans-serif; letter-spacing: 2px; margin-left: 5px; }
.auth-page .nav-links { display: flex; align-items: center; gap: 20px; }
.auth-page .nav-links > a { display: inline-flex; align-items: center; min-height: 44px; font-size: 15px; text-decoration: none; }
.auth-page .nav-back { color: var(--auth-muted); }
.auth-page .nav-login, .auth-page .nav-register { font-weight: 600; }
.auth-page .lang-dropdown { position: relative; }
.auth-page .lang-trigger { display: flex; align-items: center; gap: 6px; min-height: 44px; padding: 8px 10px; border: 1px solid var(--auth-line); border-radius: 10px; background: transparent; color: var(--auth-text); font-size: 14px; }
.auth-page .lang-menu { display: none; position: absolute; top: calc(100% + 8px); right: 0; z-index: 20; padding: 6px; min-width: 152px; background: var(--auth-panel); border: 1px solid var(--auth-line); border-radius: 12px; box-shadow: 0 12px 32px #0005; }
.auth-page .lang-dropdown.open .lang-menu { display: grid; }
.auth-page .lang-option { min-height: 44px; border: 0; border-radius: 8px; padding: 10px; text-align: left; color: var(--auth-text); background: transparent; }
.auth-page .lang-option:hover, .auth-page .lang-option.active { background: #d1bc821a; color: var(--gold); }
.auth-main, .auth-page .layout { width: min(1060px, 100%); margin: 0 auto; padding: 32px 32px max(56px, env(safe-area-inset-bottom)); }
.auth-layout, .auth-page .layout { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); align-items: center; gap: 64px; }
.auth-visual, .auth-page .left-panel { position: relative; overflow: hidden; padding: 40px 12px; }
.auth-visual-ornament { font: 170px/1 Georgia, serif; color: #d1bc8215; margin-bottom: 24px; }
.auth-visual-title, .auth-page .left-title { font-size: 38px; font-weight: 500; line-height: 1.5; margin: 0 0 24px; letter-spacing: .02em; }
.auth-visual-title em, .auth-page .left-title em { display: block; color: var(--gold); font-style: normal; }
.auth-visual-sub, .auth-page .left-sub { max-width: 340px; margin: 0; color: var(--auth-muted); font-size: 17px; line-height: 1.9; }
.auth-page .left-ornament, .auth-page .form-eyebrow { margin-bottom: 20px; color: var(--gold); font-size: 14px; letter-spacing: .08em; }
.auth-form, .auth-page .right-panel { min-width: 0; border: 1px solid var(--auth-line); border-radius: 24px; background: var(--auth-panel); padding: 32px; }
.auth-form-inner, .auth-page .form-wrap { min-width: 0; max-width: 440px; margin: 0 auto; }
.auth-form h1, .auth-page .form-title { margin: 0 0 8px; font-size: 30px; line-height: 1.35; font-weight: 600; }
.auth-form .subtitle, .auth-page .form-sub { margin: 0 0 28px; color: var(--auth-muted); font-size: 16px; }
.auth-page .social-login { display: grid; gap: 8px; }
.auth-page .google-identity-slot { display: flex; justify-content: center; align-items: center; min-height: 48px; width: 100%; max-width: 100%; }
.auth-page #google-auth-status { margin: 8px 0; color: var(--gold); font-size: 15px; line-height: 1.7; }
.auth-page #google-auth-status:empty { display: none; }
.auth-page .google-help { color: var(--auth-muted); font-size: 14px; margin: 8px 0 4px; }
.auth-page .google-help summary { min-height: 44px; display: flex; align-items: center; cursor: pointer; color: var(--auth-muted); }
.auth-page .google-help summary::after { content: '+'; margin-left: auto; padding-left: 8px; color: var(--gold); font-size: 20px; }
.auth-page .google-help[open] summary::after { content: '−'; }
.auth-page .google-help p { margin: 4px 0 16px; overflow-wrap: anywhere; }
.auth-page .google-help label { display: block; }
.auth-page #google-member-link { margin-top: 8px; }
.auth-page .divider, .auth-page .form-divider { display: flex; align-items: center; gap: 14px; color: var(--auth-muted); font-size: 14px; margin: 20px 0 24px; }
.auth-page :is(.divider, .form-divider)::before, .auth-page :is(.divider, .form-divider)::after { content: ''; flex: 1; height: 1px; background: var(--auth-line); }
.auth-page .input-group, .auth-page .field { min-width: 0; margin-bottom: 20px; }
.auth-page :is(.input-group, .field) > label { display: block; margin-bottom: 8px; font-size: 15px; font-weight: 500; }
.auth-page :is(input:not([type=hidden]), select) { display: block; width: 100%; min-width: 0; min-height: 50px; border: 1px solid #474a42; border-radius: 12px; padding: 12px 14px; background: #111310; color: var(--auth-text); font-size: 16px; line-height: 1.5; }
.auth-page input::placeholder { color: #90958a; opacity: 1; }
.auth-page select { cursor: pointer; }
.auth-page select:disabled { color: #999e91; opacity: .7; cursor: default; }
.auth-page .pw-wrap { position: relative; }
.auth-page .pw-wrap input { padding-right: 54px; }
.auth-page .pw-toggle { position: absolute; top: 3px; right: 3px; display: grid; place-items: center; width: 44px; height: 44px; padding: 10px; border: none; border-radius: 9px; background: transparent; color: var(--auth-muted); }
.auth-page .pw-toggle svg { width: 22px; height: 22px; }
.auth-page .btn-gold, .auth-page .btn-submit { width: 100%; min-height: 50px; border: 1px solid transparent; border-radius: 12px; background: var(--gold); color: #1a1b16; font-size: 16px; font-weight: 600; line-height: 1.5; padding: 12px 18px; }
.auth-page .btn-gold:hover:not(:disabled), .auth-page .btn-submit:hover:not(:disabled) { background: #dfcc95; }
.auth-page .auth-switch { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 0 8px; margin: 12px 0 0; color: var(--auth-muted); font-size: 15px; }
.auth-page .auth-switch a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; }
.auth-page .field-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
.auth-page .gender-row { display: flex; gap: 12px; margin: -8px 0 20px; }
.auth-page .gender-btn { flex: 1; min-height: 48px; padding: 10px; border: 1px solid #474a42; border-radius: 12px; background: #111310; color: var(--auth-text); }
.auth-page .gender-btn.selected { color: var(--gold); border-color: var(--gold); background: #d1bc8214; }
.auth-page .form-footer { margin-top: 20px; color: var(--auth-muted); font-size: 14px; line-height: 1.9; overflow-wrap: anywhere; }
.auth-page .form-footer a { display: inline-block; min-height: 44px; padding-block: 9px; }
.auth-page #reg-error { padding: 14px; margin-bottom: 16px; border: 1px solid #b85c55; border-radius: 12px; background: #b85c5514; color: #ffb6af; font-size: 15px; overflow-wrap: anywhere; scroll-margin-block: 20px; }
.auth-page #_toast, .auth-page .toast { position: fixed; left: 50%; bottom: max(24px, env(safe-area-inset-bottom)); z-index: 10001; transform: translateX(-50%); width: max-content; max-width: calc(100% - 32px); padding: 12px 18px; border: 1px solid #81744f; border-radius: 12px; background: #20211d; color: var(--auth-text); font-size: 15px !important; line-height: 1.6; letter-spacing: normal !important; text-align: center; overflow-wrap: anywhere; pointer-events: none; }
.auth-page .toast { opacity: 0; transition: opacity .2s; }
.auth-page .toast.show { opacity: 1; }
/* Existing gender challenge keeps its original handlers and credential lifecycle. */
.auth-page #gender-modal { padding: max(16px, env(safe-area-inset-top)) 16px max(16px, env(safe-area-inset-bottom)); overflow-y: auto; }
.auth-page #gender-modal > div { width: 100% !important; max-width: 420px !important; padding: 28px 24px !important; border-radius: 20px; }
.auth-page #gender-modal h3 { font: 600 26px/1.4 -apple-system, BlinkMacSystemFont, sans-serif !important; }
.auth-page #gender-modal p { color: var(--auth-muted) !important; font-size: 16px !important; }
.auth-page #gender-modal button { min-height: 48px; font: 16px/1.5 -apple-system, BlinkMacSystemFont, sans-serif !important; letter-spacing: normal !important; border-radius: 10px; }
@media (max-width: 760px) {
  .auth-page #nav { padding: max(12px, env(safe-area-inset-top)) 20px 12px; min-height: 76px; gap: 12px; }
  .auth-page .nav-links { gap: 12px; }
  .auth-page .nav-back { display: none !important; }
  .auth-page .nav-logo { font-size: 23px; letter-spacing: 2px; }
  .auth-page .nav-logo-zh { display: none; }
  .auth-main, .auth-page .layout { display: block; max-width: 520px; padding: 16px 20px max(32px, env(safe-area-inset-bottom)); }
  .auth-layout { display: block; }
  .auth-visual, .auth-page .left-panel { display: none; }
  .auth-form, .auth-page .right-panel { padding: 24px; border-radius: 20px; }
  .auth-page .form-eyebrow { margin-bottom: 12px; }
}
@media (max-width: 380px) {
  .auth-page #nav { padding-inline: 16px; }
  .auth-page .nav-links { gap: 8px; }
  .auth-page .lang-trigger { gap: 4px; padding-inline: 8px; }
  .auth-page .lang-globe { display: none; }
  .auth-main, .auth-page .layout { padding-inline: 16px; }
  .auth-form, .auth-page .right-panel { padding: 24px 16px; }
  .auth-page .field-row { grid-template-columns: 1fr; gap: 0; }
  .auth-form h1, .auth-page .form-title { font-size: 28px; }
}
@media (prefers-reduced-motion: reduce) {
  .auth-page *, .auth-page *::before, .auth-page *::after { scroll-behavior: auto !important; transition: none !important; }
}