/* ============================================================
   注册登录面板 —— 唯一一套纸面皮（2026-09-23 统一）
   设计真相源：docs/mockups/AUTH_PANEL_v1.html（差异清单 15 条）。
   所有入口（composer 门 / Zotero 署名行 / 设置 / 充值 / hub / 游客额度耗尽）
   打开的都是这一个面板；旧白卡 + logo + 黑按钮与按入口挂 body 类切皮的机制已删除。
   颜色只引用 tokens.css 现役 token；暗色只在下方一个变量块里换别名。
   ============================================================ */

.auth-panel-overlay {
  --auth-panel-bg: var(--tm-paper);
  --auth-panel-veil: var(--tm-paper-veil);
  --auth-input-bg: var(--tm-paper-raised);
  --auth-primary-bg: var(--tm-brand-purple);
  --auth-primary-hover: var(--tm-brand-purple-strong);
  --auth-primary-fg: #fff;
  --auth-accent-text: var(--tm-ink-purple);
  --auth-exlibris: var(--tm-ink-purple-strong);
  --auth-overlay: rgba(0, 0, 0, 0.12);
  --auth-shadow: 0 6px 18px color-mix(in srgb, var(--tm-ink-purple-strong) 8%, transparent);
  position: fixed;
  inset: 0;
  z-index: calc(var(--tm-z-modal-top) + 30); /* modal-top 与 onboarding 间层 */
  display: flex;
  align-items: flex-start;
  justify-content: center;
  /* 同一层雾面；authPanelView 打开时居中、换步只向下长；上内边距=最高位 */
  padding: clamp(56px, 12vh, 120px) 16px 24px;
  overflow-y: auto;
  background: var(--auth-overlay);
  backdrop-filter: blur(6px) saturate(115%);
  -webkit-backdrop-filter: blur(6px) saturate(115%);
}
/* 夜书房：面板浮起用 raised、输入框下沉用 paper；暗色主按钮 #988be4 底配深墨字（6.11:1） */
:root[data-theme="dark"] .auth-panel-overlay {
  --auth-panel-bg: var(--tm-paper-raised);
  --auth-panel-veil: transparent;
  --auth-input-bg: var(--tm-paper);
  --auth-primary-fg: var(--tm-paper);
  --auth-accent-text: var(--tm-brand-purple);
  --auth-overlay: rgba(0, 0, 0, 0.28);
  --auth-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
}
body.auth-panel-open { overflow: hidden; }

.auth-panel {
  position: relative;
  width: min(var(--auth-panel-max-width, 380px), 100%);
  box-sizing: border-box;
  padding: 12px 24px 22px;
  background: linear-gradient(var(--auth-panel-veil), var(--auth-panel-veil)), var(--tm-paper-texture) var(--auth-panel-bg);
  background-size: auto, 300px 300px;
  border: 1.5px solid color-mix(in srgb, var(--tm-ink-purple) 38%, var(--tm-paper-hairline-2));
  border-radius: 18px;
  box-shadow: var(--auth-shadow);
  color: var(--tm-paper-ink);
  font: 400 13px/1.5 var(--tm-font-sans);
  text-align: center;
  animation: auth-panel-in 200ms var(--tm-ease-out) both;
}
@keyframes auth-panel-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* 页眉行：‹ | EX LIBRIS | × —— 真实占位，常显 ink-2，hover 只加 8% 紫底 */
.auth-hd { display: grid; grid-template-columns: 32px 1fr 32px; align-items: center; height: 32px; margin: 0 -12px; }
.auth-ib {
  width: 32px; height: 32px; padding: 0; border: 0; border-radius: 50%;
  display: grid; place-items: center; background: transparent; color: var(--tm-paper-ink-2); cursor: pointer;
  transition: background-color var(--tm-dur-fast) var(--tm-ease-out);
}
.auth-ib:hover { background: var(--tm-brand-purple-alpha-08); color: var(--tm-paper-ink); }
.auth-ib svg { width: 14px; height: 14px; }
.auth-exlibris { font-family: var(--tm-serif); font-size: 11px; letter-spacing: 0.3em; padding-left: 0.3em; color: var(--auth-exlibris); }
.auth-title { margin: 6px 0 18px; font: 400 17px/1.35 var(--tm-serif); color: var(--tm-paper-ink); }

/* 标题区：邀请副行 / 网关报错条 / 已发送至 … 换个邮箱 */
.auth-ref-note { margin: -12px 0 16px; font-size: 12px; line-height: 1.5; color: var(--tm-paper-ink-2); }
.auth-nouse, .auth-chg, .auth-legal-link {
  padding: 0 1px; margin: 0; border: 0; background: none; cursor: pointer;
  font: inherit; color: inherit; text-decoration: underline; text-underline-offset: 3px;
}
.auth-nouse { white-space: nowrap; }
.auth-alert {
  margin: -4px 0 14px; padding: 9px 12px; text-align: left;
  background: var(--tm-status-danger-bg); border-left: 2px solid var(--tm-status-danger);
  border-radius: 4px 8px 8px 4px; color: var(--tm-status-danger-fg); font-size: 13px; line-height: 1.45;
}
.auth-sent { margin-top: -6px; font-size: 13px; color: var(--tm-paper-ink-2); }
.auth-sent-who { display: block; color: var(--tm-paper-ink); font-weight: 500; overflow-wrap: anywhere; }
.auth-chg { display: inline-block; margin-top: 2px; padding: 2px 4px; font-size: 12px; }
.auth-sent + .auth-alert { margin-top: 12px; }

/* 字段 */
.auth-form { display: flex; flex-direction: column; margin: 0; }
.auth-input {
  box-sizing: border-box; width: 100%; height: 44px; padding: 0 14px; margin: 0;
  border: 1px solid var(--tm-paper-ink-mut); border-radius: 10px;
  background: var(--auth-input-bg); color: var(--tm-paper-ink);
  font: 400 14px/1.2 var(--tm-font-sans); text-align: left;
  transition: border-color var(--tm-dur-fast) var(--tm-ease-out), box-shadow var(--tm-dur-fast) var(--tm-ease-out);
}
.auth-input::placeholder { color: color-mix(in srgb, var(--tm-paper-ink-2) 60%, var(--tm-paper-ink-mut)); opacity: 1; }
.auth-input:focus { outline: none; border-color: var(--tm-brand-purple); box-shadow: 0 0 0 3px var(--tm-brand-purple-alpha-10); }
.auth-input:disabled { opacity: 0.7; cursor: not-allowed; }
.auth-input[aria-invalid="true"] { border-color: var(--tm-status-danger); }
.auth-field-err, .auth-otp-err { margin-top: 6px; text-align: left; font-size: 12.5px; line-height: 1.45; color: var(--tm-status-danger-fg); }
.auth-otp-err { margin-top: 10px; text-align: center; }
.auth-disclose {
  align-self: flex-start; margin: 10px 0 0; padding: 2px 0; border: 0; background: none; cursor: pointer;
  font: 400 12px/1.5 var(--tm-font-sans); color: var(--tm-paper-ink-2);
  text-decoration: underline dotted; text-underline-offset: 3px;
}
.auth-inv { display: block; margin-top: 10px; text-align: left; }
.auth-inv-lab { display: block; margin-bottom: 4px; font-size: 12px; color: var(--tm-paper-ink-2); }
.auth-input--code { height: 36px; border-radius: 8px; font: 400 13px/1.2 var(--tm-font-mono); letter-spacing: 0.04em; }
.auth-input--code::placeholder { font-family: var(--tm-font-sans); letter-spacing: 0; }

/* 按钮：无上浮、无辉光；hover 只换底色 */
.auth-btn {
  position: relative; box-sizing: border-box; width: 100%; height: 44px; margin-top: 16px; padding: 0 16px;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  border-radius: 999px; cursor: pointer; font: 600 14px/1 var(--tm-font-sans);
  transition: background-color var(--tm-dur-fast) var(--tm-ease-out), border-color var(--tm-dur-fast) var(--tm-ease-out);
}
.auth-btn--primary { border: 0; background: var(--auth-primary-bg); color: var(--auth-primary-fg); }
.auth-btn--primary:hover { background: var(--auth-primary-hover); }
.auth-btn--primary[disabled] { border: 1px solid var(--tm-paper-hairline-2); background: transparent; color: var(--tm-paper-ink-mut); cursor: not-allowed; }
.auth-btn--outline { margin-top: 0; border: 1px solid var(--tm-paper-hairline-2); background: transparent; color: var(--tm-paper-ink); font-weight: 500; font-size: 13.5px; }
.auth-btn--outline:hover { background: var(--tm-brand-purple-alpha-08); }
.auth-btn svg { width: 18px; height: 18px; flex: none; }
.auth-btn-label { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.auth-btn:focus-visible, .auth-ib:focus-visible, .auth-nouse:focus-visible, .auth-disclose:focus-visible,
.auth-chg:focus-visible, .auth-legal-link:focus-visible, .auth-resend-link:focus-visible {
  outline: 2px solid var(--tm-brand-purple); outline-offset: 2px;
}
/* 在途：保持实心紫，文字让位给细圈（色随主按钮字色翻转） */
.auth-btn.loading, .auth-btn--primary.loading[disabled] { border: 0; background: var(--auth-primary-bg); color: transparent; cursor: wait; }
.auth-btn.loading::after {
  content: ""; position: absolute; top: 50%; left: 50%; width: 16px; height: 16px; margin: -8px 0 0 -8px;
  border: 2px solid color-mix(in srgb, var(--auth-primary-fg) 35%, transparent); border-top-color: var(--auth-primary-fg);
  border-radius: 50%; animation: auth-spin 0.8s linear infinite;
}
@keyframes auth-spin { to { transform: rotate(360deg); } }
.auth-otp-submit-btn.success { border: 0; background: var(--tm-status-success); color: #fff; }

.auth-or { display: flex; align-items: center; gap: 12px; margin: 18px 0; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--tm-paper-ink-2); }
.auth-or::before, .auth-or::after { content: ""; flex: 1; height: 1px; background: var(--tm-paper-hairline); }
html[lang="zh-CN"] .auth-or { font-size: 12px; letter-spacing: 0; }
.auth-options { display: flex; flex-direction: column; gap: 10px; }
.auth-legal { margin-top: 16px; font-size: 11px; line-height: 1.6; color: var(--tm-paper-ink-2); }
.auth-legal-link { text-underline-offset: 2px; }
.auth-alert, .auth-field-err, .auth-otp-err, .auth-meta, .auth-legal, .auth-sent, .auth-ref-note { text-wrap: balance; }

/* 验证码步：六槽 → 主按钮 → 帮助行 + 重发行（常显两态） */
.auth-otp-container { position: relative; margin-top: 14px; }
.auth-otp-hidden-input {
  position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; z-index: 2;
  cursor: text; font-size: 16px; border: 0; padding: 0;
}
.auth-otp-display { display: flex; justify-content: center; gap: 6px; pointer-events: none; }
.auth-otp-slot {
  flex: 1; max-width: 44px; height: 50px; display: grid; place-items: center; box-sizing: border-box;
  border: 1px solid var(--tm-paper-ink-mut); border-radius: 10px; background: var(--auth-input-bg);
  transition: border-color var(--tm-dur-fast) var(--tm-ease-out);
}
.auth-otp-char { font: 600 22px/1 var(--tm-font-mono); color: var(--tm-paper-ink); }
.auth-otp-slot.empty .auth-otp-char::before { content: ""; display: block; width: 10px; height: 1.5px; background: var(--tm-paper-hairline-2); }
.auth-otp-slot.filled { border-color: var(--tm-paper-ink-2); }
.auth-otp-slot.active { border: 1.5px solid var(--tm-brand-purple); box-shadow: 0 0 0 3px var(--tm-brand-purple-alpha-10); }
.auth-otp-slot.active .auth-otp-char::before { content: ""; display: block; width: 1.5px; height: 22px; background: var(--tm-paper-ink); }
.auth-otp-container.error .auth-otp-slot { border: 1px solid var(--tm-status-danger); background: var(--tm-status-danger-bg); box-shadow: none; }
.auth-otp-container.error .auth-otp-slot.active .auth-otp-char::before { width: 10px; height: 1.5px; background: var(--tm-paper-hairline-2); }
.auth-otp-container.disabled .auth-otp-slot { opacity: 0.6; }
.auth-otp-container.disabled .auth-otp-hidden-input { cursor: not-allowed; }
.auth-otp-container.otp-success .auth-otp-slot { border-color: var(--tm-status-success); }
.auth-otp-container.otp-success .auth-otp-char { color: var(--tm-status-success); }
/* 粘贴填充：逐槽淡入（无缩放过冲） */
.auth-otp-container.otp-cascade .auth-otp-slot.filled { animation: auth-slot-in var(--tm-dur-fast) var(--tm-ease-out) both; }
.auth-otp-container.otp-cascade .auth-otp-slot:nth-child(2) { animation-delay: 30ms; }
.auth-otp-container.otp-cascade .auth-otp-slot:nth-child(3) { animation-delay: 60ms; }
.auth-otp-container.otp-cascade .auth-otp-slot:nth-child(4) { animation-delay: 90ms; }
.auth-otp-container.otp-cascade .auth-otp-slot:nth-child(5) { animation-delay: 120ms; }
.auth-otp-container.otp-cascade .auth-otp-slot:nth-child(6) { animation-delay: 150ms; }
@keyframes auth-slot-in { from { opacity: 0.2; } to { opacity: 1; } }
.auth-meta { margin: 14px 0 0; font-size: 12px; line-height: 1.55; color: var(--tm-paper-ink-2); }
.auth-meta-unit { display: inline-block; }
.auth-resend { margin-top: 4px; min-height: 22px; font-size: 12px; line-height: 1.5; color: var(--tm-paper-ink-2); font-variant-numeric: tabular-nums; }
.auth-resend-link {
  padding: 2px 4px; border: 0; background: none; cursor: pointer;
  font: 500 12px/1.5 var(--tm-font-sans); color: var(--auth-accent-text); text-decoration: underline; text-underline-offset: 3px;
}
.auth-resend-link[disabled] { color: var(--tm-paper-ink-mut); cursor: not-allowed; }

/* Google 等待：20px G + 一行状态 + 120px 细线不定进度；返回走页眉 ‹ */
.auth-gw { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 6px 0 4px; }
.auth-gw > svg { width: 20px; height: 20px; }
.auth-gw-status { font-size: 13px; color: var(--tm-paper-ink); }
.auth-gw-track { width: 120px; height: 2px; border-radius: 2px; background: var(--tm-paper-hairline); overflow: hidden; }
.auth-gw-track i { display: block; width: 40%; height: 100%; background: var(--tm-brand-purple); animation: auth-track 1.6s linear infinite; }
@keyframes auth-track { from { transform: translateX(-100%); } to { transform: translateX(250%); } }
.auth-google-fallback { display: flex; flex-direction: column; align-items: stretch; gap: 8px; width: 100%; font-size: 12px; color: var(--tm-paper-ink-2); }
.auth-google-fallback .auth-btn { margin-top: 0; }

/* 微信扫码（Global 版不启用，保留同皮最小形态） */
.auth-qr { width: 160px; height: 160px; margin: 0 auto; border: 1px solid var(--tm-paper-hairline-2); border-radius: 10px; background: #fff; overflow: hidden; }
.auth-qr img { width: 100%; height: 100%; object-fit: cover; }
.auth-qr-status { margin-top: 12px; font-size: 13px; color: var(--tm-paper-ink); }

/* 已登录账户视图（@deprecated，防御性可达；同皮最小形态） */
.auth-panel-section { display: flex; flex-direction: column; gap: 12px; text-align: left; }
.auth-panel-grid, .auth-identity-list { display: grid; gap: 8px; }
.auth-panel-row-item, .auth-panel-balance-row { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.auth-panel-meta, .auth-panel-muted { font-size: 12px; color: var(--tm-paper-ink-2); }
.auth-panel-value { font-size: 13px; font-weight: 600; color: var(--tm-paper-ink); text-align: right; }
.auth-panel-balance { display: grid; gap: 6px; padding: 10px 12px; border: 1px solid var(--tm-paper-hairline); border-radius: 10px; background: var(--auth-input-bg); }
.auth-panel-divider { height: 1px; background: var(--tm-paper-hairline); }
.auth-panel-subtitle { font-size: 12px; color: var(--tm-paper-ink-2); }
.auth-identity-item { padding: 8px 12px; border: 1px solid var(--tm-paper-hairline); border-radius: 10px; }
.auth-identity-provider { font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--tm-paper-ink-2); }
.auth-identity-subject, .auth-identity-email { font-size: 12px; color: var(--tm-paper-ink); }

@media (max-width: 340px) {
  .auth-panel-overlay { padding-left: 12px; padding-right: 12px; }
  .auth-panel { padding: 10px 20px 20px; }
}
@media (prefers-reduced-motion: reduce) {
  .auth-panel, .auth-otp-container.otp-cascade .auth-otp-slot.filled { animation: none; }
  .auth-gw-track i { animation: none; width: 100%; opacity: 0.5; }
}