/* 后台登录 — 藏青 + 冰蓝品牌 */
.admin-login-page {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px 48px;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: #122a45;
  position: relative;
  overflow-x: hidden;
}

.admin-login-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: linear-gradient(145deg, #122a45 0%, #1a3a5c 38%, #2e6f8f 72%, #6ec8e8 100%);
}

.admin-login-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse 85% 55% at 15% 10%, rgba(110, 200, 232, 0.45), transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 90%, rgba(255, 255, 255, 0.12), transparent 50%);
  pointer-events: none;
}

.admin-login-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
  pointer-events: none;
}

.admin-login-wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
}

.admin-login-card {
  background: #ffffff;
  border-radius: 20px;
  box-shadow:
    0 28px 56px -16px rgba(18, 42, 69, 0.35),
    0 0 0 1px rgba(184, 228, 244, 0.5);
  padding: 40px 36px 36px;
}

@media (max-width: 480px) {
  .admin-login-card {
    padding: 28px 22px;
    border-radius: 16px;
  }
}

.admin-login-brand {
  text-align: center;
  margin-bottom: 28px;
}

.admin-login-logo {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 14px;
  background: linear-gradient(135deg, #6ec8e8 0%, #1a3a5c 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 28px -6px rgba(26, 58, 92, 0.45);
}

.admin-login-logo svg {
  width: 30px;
  height: 30px;
  color: #fff;
}

.admin-login-brand h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #122a45;
  line-height: 1.3;
}

.admin-login-sub {
  margin: 8px 0 0;
  font-size: 0.875rem;
  color: #5c6b7a;
  font-weight: 500;
}

.admin-login-error {
  margin: 0 0 16px;
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.45;
  color: #b91c1c;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 10px;
}

.admin-login-error[hidden] {
  display: none;
}

.admin-login-field {
  margin-bottom: 18px;
}

.admin-login-field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #1a3a5c;
  margin-bottom: 8px;
}

.admin-login-field input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 14px;
  font-size: 15px;
  border: 1px solid #dde5ee;
  border-radius: 10px;
  background: #f6f9fc;
  color: #122a45;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.admin-login-field input::placeholder {
  color: #8b9aab;
}

.admin-login-field input:hover {
  border-color: #b8e4f4;
  background: #fff;
}

.admin-login-field input:focus {
  outline: none;
  border-color: #6ec8e8;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(110, 200, 232, 0.28);
}

.admin-login-submit {
  width: 100%;
  margin-top: 8px;
  padding: 14px 20px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  background: linear-gradient(135deg, #2e4f73 0%, #1a3a5c 100%);
  box-shadow: 0 6px 18px -4px rgba(18, 42, 69, 0.45);
  transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.12s ease;
}

.admin-login-submit:hover {
  filter: brightness(1.06);
  box-shadow: 0 10px 24px -6px rgba(18, 42, 69, 0.5);
}

.admin-login-submit:active {
  transform: scale(0.98);
}

.admin-login-submit:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(110, 200, 232, 0.45), 0 6px 18px -4px rgba(18, 42, 69, 0.45);
}

.admin-login-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.admin-login-hint {
  margin: 20px 0 0;
  font-size: 12px;
  line-height: 1.55;
  color: #8b9aab;
  text-align: center;
}

.admin-login-meta {
  margin-top: 24px;
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.5;
}