/* ===== 登录/注册遮罩 ===== */
.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(135deg, rgba(16, 37, 31, 0.92), rgba(25, 56, 47, 0.88));
  backdrop-filter: blur(12px);
}
.auth-overlay[hidden] {
  display: none;
}

.auth-card {
  width: min(420px, 100%);
  padding: 36px 32px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 28px;
  background: rgba(255, 252, 243, 0.97);
  box-shadow: 0 32px 100px rgba(16, 37, 31, 0.36);
}

.auth-header {
  text-align: center;
  margin-bottom: 28px;
}
.auth-header .brand-mark {
  display: inline-grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin-bottom: 12px;
  color: var(--ink);
  background: var(--gold);
  border-radius: 18px;
  font-size: 20px;
  font-weight: 900;
}
.auth-header h2 {
  margin: 0 0 6px;
  color: var(--ink);
  font-size: 22px;
}
.auth-header p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 22px;
}

.auth-tab {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.68);
  color: var(--muted);
  cursor: pointer;
  font-weight: 800;
  transition: 0.2s ease;
}
.auth-tab.active {
  color: #fff;
  background: var(--green);
  border-color: var(--green);
}

.auth-form {
  display: grid;
  gap: 14px;
}

.auth-form label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.auth-form input {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
  outline: none;
  font-size: 15px;
}
.auth-form input:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(35, 122, 84, 0.12);
}

.auth-submit {
  margin-top: 8px;
  padding: 14px;
  font-size: 16px;
  border-radius: 14px;
}

.auth-error {
  margin: 0;
  padding: 10px 14px;
  color: var(--red);
  background: rgba(185, 74, 58, 0.1);
  border: 1px solid rgba(185, 74, 58, 0.18);
  border-radius: 12px;
  font-size: 13px;
  font-weight: 700;
}

.auth-info {
  margin: 0;
  padding: 10px 14px;
  color: var(--green);
  background: rgba(35, 122, 84, 0.1);
  border: 1px solid rgba(35, 122, 84, 0.18);
  border-radius: 12px;
  font-size: 13px;
  font-weight: 700;
}

/* ===== 用户信息卡片 ===== */
.user-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 16px;
  margin-bottom: 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
}

.user-info strong {
  display: block;
  color: #fffaf0;
  font-size: 14px;
}

.user-info small {
  color: rgba(255, 250, 240, 0.68);
  font-size: 12px;
}

.btn-sm {
  padding: 7px 12px;
  font-size: 12px;
  border-radius: 10px;
}

/* ===== 后台管理入口 ===== */
.admin-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  margin-top: 8px;
  color: var(--gold);
  border: 1px solid rgba(200, 138, 29, 0.3);
  border-radius: 10px;
  font-size: 12px;
  font-weight: 800;
  text-decoration: none;
  transition: 0.2s ease;
}
.admin-link:hover {
  background: rgba(200, 138, 29, 0.12);
}

/* ===== 响应式 ===== */
@media (max-width: 480px) {
  .auth-card {
    padding: 24px 20px;
    border-radius: 22px;
  }
  .auth-header h2 {
    font-size: 20px;
  }
}