/* 论文喵 · 手机、邮箱与微信登录 */
#modalLogin .login-modal {
  width: 440px;
  max-width: 100%;
  max-height: min(86vh, 740px);
  border: 1px solid rgba(228, 231, 236, .7);
}

#modalLogin .modal-head { padding: 23px 24px 0; }
#modalLogin .modal-head h3 { font-size: 21px; line-height: 1.45; }
#modalLogin .modal-head p { line-height: 1.75; }
#modalLogin .modal-head .x { padding: 3px 2px; }
#modalLogin .modal-body { padding: 20px 24px 24px; }

.login-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 4px;
  padding: 4px;
  border: 1px solid #EDF2F7;
  border-radius: 11px;
  background: #F4F7FA;
}

.login-tab {
  min-width: 0;
  min-height: 37px;
  padding: 7px 8px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.6;
  white-space: nowrap;
  transition: background .15s, color .15s, box-shadow .15s;
}

.login-tab:hover { color: var(--brand-dark); background: rgba(255, 255, 255, .65); }
.login-tab.on, .login-tab[aria-selected="true"] {
  border-color: #E4EAF2;
  background: #fff;
  color: var(--brand-dark);
  font-weight: 600;
  box-shadow: 0 1px 4px rgba(10, 32, 54, .06);
}

.login-demo-note { margin: 11px 2px 21px; color: var(--muted); font-size: 12.5px; line-height: 1.75; }
#loginAuthForm { margin: 0; }
.login-label { display: block; margin: 0 0 17px; color: var(--ink2); font-size: 14px; font-weight: 500; line-height: 1.65; }
.login-label > .field { display: block; margin-top: 7px; }
#modalLogin .field { height: 43px; min-width: 0; font-size: 15px; font-weight: 400; }
#modalLogin .field::placeholder { color: var(--muted2); font-size: 14px; }
#modalLogin input[aria-invalid="true"] { border-color: var(--danger); }
.login-input-row { display: grid; grid-template-columns: 65px minmax(0, 1fr); gap: 9px; margin-top: 7px; }
.login-country { display: flex; align-items: center; justify-content: center; height: 43px; border: 1px solid var(--line); border-radius: 10px; background: #F7F9FB; color: var(--ink2); font-size: 14px; font-weight: 400; }
.login-code-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 9px; margin-top: 7px; }
#loginSendCode { min-width: 110px; height: 43px; padding: 0 12px; font-size: 13px; color: var(--brand-dark); border-color: #D8E1EB; background: #F7F9FB; }
#loginSendCode:hover { border-color: #B9C9D9; background: var(--brand-soft); }
#loginSendCode:disabled, .login-send:disabled { opacity: 1; color: var(--muted2); border-color: var(--line); background: #F7F9FB; cursor: default; }
.login-hint { margin: -6px 0 15px; color: var(--muted); font-size: 12.5px; line-height: 1.75; font-weight: 400; overflow-wrap: anywhere; }
.login-error { display: block; margin: 6px 0 0; color: #5A0301; font-size: 12.5px; line-height: 1.7; font-weight: 400; overflow-wrap: anywhere; }
#loginError { margin: 0 0 12px; }
.login-error:empty, .login-hint:empty { display: none; }
.login-submit { width: 100%; height: 43px; margin-top: 3px; font-size: 15px; border-radius: 10px; }

.login-wechat-placeholder { display: flex; flex-direction: column; align-items: center; padding: 20px 15px 25px; text-align: center; }
.login-wechat-symbol { display: grid; place-items: center; width: 64px; height: 64px; margin-bottom: 17px; border-radius: 20px; background: #EDF2F7; color: #24405C; font-size: 24px; font-weight: 600; line-height: 1; }
.login-wechat-placeholder b { color: var(--ink2); font-size: 15px; font-weight: 600; line-height: 1.6; }
.login-wechat-placeholder p { max-width: 285px; margin: 9px 0 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

#loginAccountPanel { padding-top: 10px; text-align: center; }
#loginAccountName { margin: 0; color: var(--ink); font-size: 18px; font-weight: 600; line-height: 1.6; overflow-wrap: anywhere; }
#loginAccountMethod { margin: 7px 0 24px; color: var(--muted); font-size: 13px; line-height: 1.8; overflow-wrap: anywhere; }
#loginLogout { color: var(--ink2); background: #fff; }
#loginBtn.is-login { color: var(--brand-dark); border-color: #D8E1EB; background: #F7F9FB; }

@media (max-width: 480px) {
  #modalLogin { padding: 12px; }
  #modalLogin .login-modal { max-height: 90vh; max-height: 90dvh; border-radius: 15px; }
  #modalLogin .modal-head { padding: 21px 19px 0; }
  #modalLogin .modal-head h3 { font-size: 20px; }
  #modalLogin .modal-body { padding: 18px 19px 21px; }
  .login-tab { font-size: 13.5px; padding-left: 5px; padding-right: 5px; }
  .login-demo-note { margin-bottom: 18px; font-size: 12px; }
  .login-input-row { grid-template-columns: 57px minmax(0, 1fr); gap: 8px; }
  .login-code-row { gap: 8px; }
  #loginSendCode { min-width: 96px; padding-left: 8px; padding-right: 8px; font-size: 12.5px; }
  .login-wechat-placeholder { padding-left: 6px; padding-right: 6px; }
}
/* Labels sit immediately above their fields. */
#modalLogin .login-label { margin: 0 0 7px; }
#modalLogin .login-label small { float: right; color: var(--muted); font-size: 12px; font-weight: 400; }
#loginAuthForm > .login-label { margin-top: 18px; }
#modalLogin .login-input-row, #modalLogin .login-code-row { margin-top: 0; }
#loginCodeHint { margin: 9px 0 14px; }
@media (max-width:480px) { #modalLogin .field { font-size: 17px; } }
#modalLogin .login-modal { min-width: 0; max-width: calc(100vw - 24px); }
#modalLogin .modal-body, #loginAuthForm, #loginPhonePanel, #loginEmailPanel { min-width: 0; }

/* 交互状态：与主站按钮、卡片统一 */
.login-tab {
  transition: background-color .16s ease, color .16s ease, box-shadow .16s ease, transform .12s ease;
}
.login-tab:hover {
  color: var(--brand-dark);
  background: rgba(255, 255, 255, .82);
  box-shadow: 0 2px 8px -6px rgba(10, 32, 54, .55);
}
.login-tab.on:hover, .login-tab[aria-selected="true"]:hover {
  background: #fff;
  box-shadow: 0 1px 4px rgba(10, 32, 54, .06);
}
.login-tab:active { transform: scale(.98); }
#loginSendCode:active:not(:disabled) { background: #E9EFF6; border-color: #A9BACB; }

/* 我的账号：卡密兑换 */
#loginAccountPanel .login-redeem {
  margin: 2px 0 18px;
  padding: 15px 15px 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #F7F9FB;
  text-align: left;
}
.login-redeem-title { margin: 0 0 9px; color: var(--ink2); font-size: 14px; font-weight: 600; line-height: 1.6; }
.login-redeem-hint { margin: 8px 0 0; color: var(--muted); font-size: 12.5px; line-height: 1.7; overflow-wrap: anywhere; }
.login-redeem-hint.is-ok { color: var(--prussian); font-weight: 600; }
.login-redeem-hint.is-error { color: var(--garnet); font-weight: 600; }

/* 邮箱注册/登录 + 短信登录置灰 */
#loginTabs { margin-bottom: 2px; }
.login-tab:disabled, .login-tab.is-disabled {
  color: var(--muted2);
  background: transparent;
  cursor: not-allowed;
  box-shadow: none;
}
.login-tab:disabled:hover, .login-tab.is-disabled:hover {
  color: var(--muted2);
  background: transparent;
  box-shadow: none;
}
#loginAuthForm, #loginPhoneForm { margin: 0; }
#loginForgotForm { margin: 18px 0 0; }
#loginForgotForm > .login-hint:first-child { margin-top: 0; }
#loginForgotForm > .login-label { margin-top: 12px; }
#loginForgotForm > .login-label:first-of-type { margin-top: 0; }
#loginTabs + #loginError { margin: 12px 0 0; }
#loginEmailHint { margin: 10px 0 16px; }
#forgotHint { margin: 16px 0 16px; }
.login-phone-notice {
  margin: 14px 0 16px;
  padding: 11px 13px;
  border: 1px solid #EDF2F7;
  border-radius: 10px;
  background: #F4F7FA;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.75;
}
#loginPhoneForm .field:disabled {
  background: #F7F9FB;
  color: var(--muted2);
  cursor: not-allowed;
}
#loginPhoneForm .login-country { background: #F7F9FB; color: var(--muted2); }