/* ============================================
   元能台 · 认证页覆盖样式 (登录/注册)
   CSS叠加方案 - 仅新增/覆盖样式，不改HTML结构
   ============================================
   设计系统：
   主色调：#4A90D9（蓝）→ #1677FF（紫）渐变
   背景：#FFFFFF 基色 + 浅蓝紫渐变光晕
   卡片：#FFFFFF + 柔和阴影 + 大圆角
   文字：#1E293B（主）/ #64748B（次）/ #94A3B8（弱）
   设计风格：亮色鲜明有朝气，腾讯/微信网页风格
   ============================================ */

/* =======================================
   0. 设计令牌覆盖（优先级高于 theme.css）
   ======================================= */
:root {
  --sb-bg:         #FFFFFF !important;
  --sb-card:       #FFFFFF !important;
  --sb-nav:        #FFFFFF !important;
  --sb-brand:      #4A90D9 !important;
  --sb-brand-light:#E6F4FF !important;
  --sb-brand-hover:#1677FF !important;
  --sb-text-1:     #1E293B !important;
  --sb-text-2:     #64748B !important;
  --sb-text-3:     #94A3B8 !important;
  --sb-border:     #E2E8F0 !important;
  --sb-shadow-sm:  0 1px 2px rgba(0,0,0,.04) !important;
  --sb-shadow:     0 4px 12px rgba(74,144,217,.08) !important;
  --sb-shadow-lg:  0 12px 40px rgba(74,144,217,.12) !important;
  --sb-shadow-brand: 0 8px 32px rgba(74,144,217,.15), 0 4px 12px rgba(22,119,255,.10) !important;
  --sb-radius-sm:  12px !important;
  --sb-radius:     16px !important;
  --sb-radius-lg:  20px !important;
  --sb-radius-xl:  24px !important;
}

/* =======================================
   1. 全局 & 背景
   ======================================= */
body[data-page="login"],
body[data-page="register"],
body:has(.logo h1) {
  background:
    radial-gradient(ellipse at 15% 0%, rgba(74,144,217,0.12) 0%, transparent 45%),
    radial-gradient(ellipse at 85% 100%, rgba(22,119,255,0.10) 0%, transparent 50%),
    linear-gradient(180deg, #EFF6FF 0%, #F0F7FF 40%, #FFFFFF 100%) !important;
  min-height: 100vh !important;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif !important;
  color: var(--sb-text-1) !important;
  overflow-x: hidden;
}

/* =======================================
   2. Logo 品牌区
   ======================================= */
.logo {
  text-align: center !important;
  margin-bottom: 32px !important;
  cursor: pointer !important;
  animation: logoFadeIn 0.6s ease-out;
}
@keyframes logoFadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.logo h1 {
  font-size: 36px !important;
  font-weight: 800 !important;
  letter-spacing: 3px !important;
  background: linear-gradient(135deg, #4A90D9 0%, #1677FF 100%) !important;
  -webkit-background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
  background-clip: text !important;
  margin: 0 !important;
  display: inline-block !important;
}
.logo h1 span {
  background: linear-gradient(135deg, #1677FF 0%, #4A90D9 100%) !important;
  -webkit-background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
  background-clip: text !important;
  font-weight: 700 !important;
  font-size: 28px !important;
  margin-left: 4px !important;
}

.logo p {
  color: var(--sb-text-2) !important;
  font-size: 14px !important;
  margin-top: 8px !important;
  letter-spacing: 2px;
}

/* =======================================
   3. 登录/注册卡片
   ======================================= */
.card {
  background: #FFFFFF !important;
  border-radius: 20px !important;
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.04),
    0 8px 32px rgba(74, 144, 217, 0.10),
    0 24px 64px rgba(22, 119, 255, 0.08) !important;
  border: 1px solid rgba(74, 144, 217, 0.08) !important;
  padding: 40px 36px !important;
  animation: cardFadeIn 0.5s ease-out 0.1s both;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #4A90D9 0%, #1677FF 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.card:hover::before {
  opacity: 1;
}
@keyframes cardFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card h2 {
  text-align: center !important;
  margin-bottom: 6px !important;
  font-size: 26px !important;
  color: var(--sb-text-1) !important;
  font-weight: 700 !important;
  letter-spacing: 0.5px;
}
.card .sub {
  text-align: center !important;
  color: var(--sb-text-2) !important;
  margin-bottom: 28px !important;
  font-size: 14px !important;
}

/* 提示条 */
.tips {
  background: linear-gradient(135deg, #EFF6FF 0%, #F0F7FF 100%) !important;
  border: 1px solid rgba(74, 144, 217, 0.20) !important;
  border-radius: 12px !important;
  padding: 12px 16px !important;
  margin-bottom: 24px !important;
  font-size: 13px !important;
  color: #1E40AF !important;
  line-height: 1.6 !important;
}
.tips a {
  color: #4A90D9 !important;
  font-weight: 600 !important;
  text-decoration: none !important;
  transition: color 0.2s ease !important;
}
.tips a:hover { color: #1677FF !important; }

/* 注册奖励条 */
.bonus {
  background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%) !important;
  border: 1px solid #FBBF24 !important;
  border-radius: 12px !important;
  padding: 14px !important;
  margin-bottom: 24px !important;
  text-align: center !important;
  font-size: 14px !important;
  color: #92400E !important;
  font-weight: 600 !important;
  box-shadow: 0 2px 8px rgba(251, 191, 36, 0.20) !important;
}

/* =======================================
   4. 表单 & 输入框
   ======================================= */
.form-row {
  display: flex !important;
  gap: 14px !important;
  margin-bottom: 20px !important;
}

.form-group {
  margin-bottom: 20px !important;
  flex: 1 !important;
  position: relative !important;
}

.form-group label {
  display: block !important;
  margin-bottom: 8px !important;
  color: var(--sb-text-1) !important;
  font-weight: 600 !important;
  font-size: 13px !important;
  letter-spacing: 0.3px;
}

.form-group input {
  width: 100% !important;
  padding: 12px 16px !important;
  border: 1.5px solid var(--sb-border) !important;
  border-radius: 12px !important;
  font-size: 14px !important;
  outline: none !important;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
  background: #FFFFFF !important;
  color: var(--sb-text-1) !important;
  font-family: inherit !important;
}
.form-group input::placeholder {
  color: var(--sb-text-3) !important;
}
.form-group input:hover {
  border-color: #CBD5E1 !important;
}
.form-group input:focus {
  border-color: #4A90D9 !important;
  box-shadow: 0 0 0 4px rgba(74, 144, 217, 0.12) !important;
  background: #FFFFFF !important;
  transform: translateY(-1px);
}

/* 输入框校验状态 */
.form-group input.valid {
  border-color: #10B981 !important;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.10) !important;
}
.form-group input.invalid {
  border-color: #EF4444 !important;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.10) !important;
}

/* 密码眼睛 */
.pw-toggle {
  position: absolute !important;
  right: 14px !important;
  top: 38px !important;
  cursor: pointer !important;
  color: var(--sb-text-3) !important;
  font-size: 18px !important;
  user-select: none !important;
  padding: 6px !important;
  border-radius: 6px !important;
  transition: all 0.2s ease !important;
}
.pw-toggle:hover {
  color: #4A90D9 !important;
  background: rgba(74, 144, 217, 0.08) !important;
}

/* 密码强度条 */
.pw-strength {
  height: 4px !important;
  border-radius: 2px !important;
  margin-top: 8px !important;
  background: #E2E8F0 !important;
  overflow: hidden !important;
}
.pw-strength-bar {
  height: 100% !important;
  border-radius: 2px !important;
  transition: all 0.3s ease !important;
}
.pw-hint {
  font-size: 12px !important;
  margin-top: 6px !important;
  color: var(--sb-text-3) !important;
}

/* =======================================
   5. 主按钮
   ======================================= */
.btn {
  width: 100% !important;
  padding: 14px !important;
  background: linear-gradient(135deg, #4A90D9 0%, #1677FF 100%) !important;
  color: #FFFFFF !important;
  border: none !important;
  border-radius: 12px !important;
  font-size: 15px !important;
  font-weight: 700 !important;
  cursor: pointer !important;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
  box-shadow: 0 4px 14px rgba(74, 144, 217, 0.25), 0 2px 6px rgba(22, 119, 255, 0.15) !important;
  letter-spacing: 2px !important;
  position: relative !important;
  overflow: hidden !important;
  margin-top: 4px !important;
  height: auto !important;
  min-height: 48px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
}
.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.6s ease;
}
.btn:hover {
  transform: translateY(-2px) !important;
  box-shadow:
    0 6px 20px rgba(74, 144, 217, 0.35),
    0 12px 32px rgba(22, 119, 255, 0.25) !important;
}
.btn:hover::before { left: 100%; }
.btn:active {
  transform: translateY(0) !important;
  box-shadow: 0 2px 8px rgba(74, 144, 217, 0.20) !important;
}
.btn:disabled {
  opacity: 0.6 !important;
  cursor: not-allowed !important;
  transform: none !important;
  box-shadow: none !important;
}

.btn .spinner {
  display: inline-block !important;
  width: 18px !important;
  height: 18px !important;
  border: 2.5px solid rgba(255,255,255,0.3) !important;
  border-top-color: #fff !important;
  border-radius: 50% !important;
  animation: spin 0.6s linear infinite !important;
  vertical-align: middle !important;
  margin-right: 8px !important;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* =======================================
   6. 链接 & 底部文字
   ======================================= */
.link {
  text-align: center !important;
  margin-top: 18px !important;
  color: var(--sb-text-2) !important;
  font-size: 14px !important;
}
.link a {
  color: #4A90D9 !important;
  text-decoration: none !important;
  font-weight: 600 !important;
  transition: all 0.2s ease !important;
  position: relative;
}
.link a::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: linear-gradient(90deg, #4A90D9, #1677FF);
  transition: width 0.3s ease;
}
.link a:hover { color: #1677FF !important; }
.link a:hover::after { width: 100%; }

/* =======================================
   7. 错误/成功提示
   ======================================= */
.error {
  color: #EF4444 !important;
  text-align: center !important;
  margin-top: 14px !important;
  font-size: 13px !important;
  display: none;
  background: #FEF2F2 !important;
  padding: 12px 16px !important;
  border-radius: 12px !important;
  border: 1px solid #FECACA !important;
  font-weight: 500 !important;
  animation: shake 0.4s ease;
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.success {
  color: #1D4ED8 !important;
  text-align: center !important;
  margin-top: 14px !important;
  font-size: 14px !important;
  display: none;
  background: linear-gradient(135deg, #E6F4FF 0%, #DBEAFE 100%) !important;
  padding: 14px 16px !important;
  border-radius: 12px !important;
  border: 1px solid #93C5FD !important;
  font-weight: 500 !important;
}
.success strong {
  color: #0958D9 !important;
  font-weight: 700 !important;
}

/* =======================================
   8. 底部 footer
   ======================================= */
.footer {
  margin-top: 32px !important;
  text-align: center !important;
  color: var(--sb-text-3) !important;
  font-size: 12px !important;
  line-height: 1.8 !important;
}
.footer a {
  color: var(--sb-text-3) !important;
  text-decoration: none !important;
  transition: color 0.2s ease !important;
}
.footer a:hover {
  color: #4A90D9 !important;
}

/* =======================================
   9. global_nav 导航覆盖
   ======================================= */
.sb-global-nav {
  background: rgba(255, 255, 255, 0.85) !important;
  backdrop-filter: blur(12px) !important;
  -webkit-backdrop-filter: blur(12px) !important;
  border-bottom: 1px solid rgba(226, 232, 240, 0.8) !important;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04) !important;
}
.sb-global-nav .nav-brand,
.sb-global-nav .brand {
  background: linear-gradient(135deg, #4A90D9 0%, #1677FF 100%) !important;
  -webkit-background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
  background-clip: text !important;
  font-weight: 800 !important;
}
.sb-global-nav a.nav-link {
  color: #64748B !important;
  transition: all 0.2s ease !important;
}
.sb-global-nav a.nav-link:hover,
.sb-global-nav a.nav-link.active {
  color: #4A90D9 !important;
  background: rgba(74, 144, 217, 0.08) !important;
}

/* =======================================
   10. 滚动条美化
   ======================================= */
body[data-page="login"]::-webkit-scrollbar,
body[data-page="register"]::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
body[data-page="login"]::-webkit-scrollbar-track,
body[data-page="register"]::-webkit-scrollbar-track {
  background: #F1F5F9;
}
body[data-page="login"]::-webkit-scrollbar-thumb,
body[data-page="register"]::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, #4A90D9, #1677FF);
  border-radius: 4px;
}
body[data-page="login"]::-webkit-scrollbar-thumb:hover,
body[data-page="register"]::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #3B82D0, #1D4ED8);
}

/* Firefox */
body[data-page="login"],
body[data-page="register"] {
  scrollbar-width: thin;
  scrollbar-color: #4A90D9 #F1F5F9;
}

/* =======================================
   11. 输入框图标装饰（CSS伪元素模拟）
   ======================================= */
/* 给每个带 id 的输入框添加左侧图标背景（不改变HTML结构，用背景图模拟） */
.form-group input#login_id,
.form-group input#nickname {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2'%3E%3C/path%3E%3Ccircle cx='12' cy='7' r='4'%3E%3C/circle%3E%3C/svg%3E") !important;
  background-repeat: no-repeat !important;
  background-position: 14px center !important;
  padding-left: 42px !important;
}

.form-group input#password,
.form-group input#confirm,
.form-group input#login_pw {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='11' width='18' height='11' rx='2' ry='2'%3E%3C/rect%3E%3Cpath d='M7 11V7a5 5 0 0 1 10 0v4'%3E%3C/path%3E%3C/svg%3E") !important;
  background-repeat: no-repeat !important;
  background-position: 14px center !important;
  padding-left: 42px !important;
}

.form-group input#phone {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M22 16.92v3a2 2 0 0 1-2.18 2 19.79 19.79 0 0 1-8.63-3.07 19.5 19.5 0 0 1-6-6 19.79 19.79 0 0 1-3.07-8.67A2 2 0 0 1 4.11 2h3a2 2 0 0 1 2 1.72c.127.96.361 1.903.7 2.81a2 2 0 0 1-.45 2.11L8.09 9.91a16 16 0 0 0 6 6l1.27-1.27a2 2 0 0 1 2.11-.45c.907.339 1.85.573 2.81.7A2 2 0 0 1 22 16.92z'%3E%3C/path%3E%3C/svg%3E") !important;
  background-repeat: no-repeat !important;
  background-position: 14px center !important;
  padding-left: 42px !important;
}

.form-group input#email {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 4h16c1.1 0 2 .9 2 2v12c0 1.1-.9 2-2 2H4c-1.1 0-2-.9-2-2V6c0-1.1.9-2 2-2z'%3E%3C/path%3E%3Cpolyline points='22,6 12,13 2,6'%3E%3C/polyline%3E%3C/svg%3E") !important;
  background-repeat: no-repeat !important;
  background-position: 14px center !important;
  padding-left: 42px !important;
}

/* 聚焦时图标变色（用filter模拟）*/
.form-group input:focus {
  filter: none;
}

/* =======================================
   12. 响应式适配
   ======================================= */
@media (max-width: 640px) {
  body[data-page="login"],
  body[data-page="register"] {
    padding: 16px !important;
    padding-bottom: 0 !important;
  }

  .logo { margin-bottom: 24px !important; }
  .logo h1 { font-size: 28px !important; letter-spacing: 2px !important; }
  .logo h1 span { font-size: 22px !important; }
  .logo p { font-size: 12px !important; letter-spacing: 1px; }

  .card {
    padding: 28px 20px !important;
    border-radius: 16px !important;
    width: 100% !important;
    max-width: 420px !important;
    box-shadow:
      0 1px 2px rgba(0, 0, 0, 0.04),
      0 4px 16px rgba(74, 144, 217, 0.10) !important;
  }

  .card h2 { font-size: 22px !important; }
  .card .sub { font-size: 13px !important; margin-bottom: 24px !important; }

  .form-row {
    flex-direction: column !important;
    gap: 0 !important;
    margin-bottom: 0 !important;
  }
  .form-group { margin-bottom: 16px !important; }
  .form-group input { padding: 11px 14px !important; font-size: 14px !important; }
  .form-group input#login_id,
  .form-group input#password,
  .form-group input#confirm,
  .form-group input#phone,
  .form-group input#email,
  .form-group input#nickname {
    padding-left: 40px !important;
    background-position: 12px center !important;
  }

  .btn {
    padding: 12px !important;
    font-size: 15px !important;
    letter-spacing: 2px !important;
  }

  .footer { margin-top: 24px !important; font-size: 11px !important; }
}

/* 超小屏 */
@media (max-width: 360px) {
  .card { padding: 24px 16px !important; }
  .logo h1 { font-size: 24px !important; }
}

/* =======================================
   13. 深色模式兼容（保留浅色）
   ======================================= */
@media (prefers-color-scheme: dark) {
  body[data-page="login"],
  body[data-page="register"] {
    background:
      radial-gradient(ellipse at 15% 0%, rgba(74,144,217,0.15) 0%, transparent 45%),
      radial-gradient(ellipse at 85% 100%, rgba(22,119,255,0.12) 0%, transparent 50%),
      linear-gradient(180deg, #0F172A 0%, #1E293B 100%) !important;
    color: #E2E8F0 !important;
  }
  .card {
    background: #1E293B !important;
    border-color: rgba(74, 144, 217, 0.15) !important;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3) !important;
  }
  .card h2 { color: #F1F5F9 !important; }
  .card .sub { color: #94A3B8 !important; }
  .form-group label { color: #CBD5E1 !important; }
  .form-group input {
    background: #0F172A !important;
    border-color: #334155 !important;
    color: #E2E8F0 !important;
  }
  .form-group input::placeholder { color: #64748B !important; }
  .form-group input:focus {
    border-color: #4A90D9 !important;
    background: #1E293B !important;
  }
  .link { color: #94A3B8 !important; }
  .footer { color: #64748B !important; }
}