/*
 * NetCue 全局配色与 Bootstrap 变量（在 bootstrap.min.css 之后加载）
 */
:root {
  --bs-primary: #2563eb;
  --bs-primary-rgb: 37, 99, 235;
  --bs-link-color: #2563eb;
  --bs-link-hover-color: #1d4ed8;

  --ut-primary: #2563eb;
  --ut-primary-dark: #1e40af;
  --ut-accent: #0ea5e9;
  --ut-light-bg: #f1f5f9;
  --ut-text: #0f172a;
  --ut-text-muted: #64748b;
  --ut-border: #e2e8f0;
  --ut-success: #22c55e;
  --ut-danger: #ef4444;
  --ut-warning: #f59e0b;
  --ut-unknown: #94a3b8;

  --ut-radius-sm: 8px;
  --ut-radius-md: 12px;
  --ut-shadow-card: 0 1px 2px rgba(15, 23, 42, 0.05), 0 8px 24px rgba(15, 23, 42, 0.06);
  --ut-navbar-bg: rgba(255, 255, 255, 0.92);
}

html {
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  background-color: var(--ut-light-bg);
  color: var(--ut-text);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  padding-left: env(safe-area-inset-left, 0);
  padding-right: env(safe-area-inset-right, 0);
  padding-bottom: env(safe-area-inset-bottom, 0);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 70% 45% at 50% -15%, rgba(37, 99, 235, 0.08), transparent),
    linear-gradient(to bottom, var(--ut-light-bg), var(--ut-light-bg));
}

/* 顶部导航：全宽 + 毛玻璃 */
.ut-navbar {
  background: var(--ut-navbar-bg) !important;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--ut-border);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  padding-top: max(0.25rem, env(safe-area-inset-top, 0));
}

.ut-navbar .navbar-brand {
  color: var(--ut-primary-dark);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.ut-navbar .navbar-brand i {
  color: var(--ut-primary);
}

.ut-navbar .nav-link {
  color: var(--ut-text-muted);
  font-weight: 500;
  border-radius: var(--ut-radius-sm);
  padding: 0.45rem 0.75rem !important;
}

.ut-navbar .nav-link:hover,
.ut-navbar .nav-link.active {
  color: var(--ut-primary);
  background: rgba(37, 99, 235, 0.08);
}

.ut-navbar .nav-link.ut-user-name {
  color: var(--ut-text);
  font-weight: 600;
}

.ut-navbar .ut-nav-user-toggle {
  color: var(--ut-text);
  font-weight: 600;
  max-width: 12rem;
}

.ut-navbar .ut-nav-user-toggle::after {
  margin-left: 0.15rem;
}

.ut-navbar .ut-nav-user-avatar {
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
  background: linear-gradient(145deg, rgba(37, 99, 235, 0.18), rgba(37, 99, 235, 0.06));
  color: var(--ut-primary);
  font-size: 0.85rem;
  font-weight: 700;
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.12);
}

.ut-navbar .ut-nav-user-name {
  max-width: 7rem;
  font-size: 0.9rem;
}

.ut-navbar .dropdown-menu.ut-nav-user-menu {
  --bs-dropdown-min-width: 0;
  min-width: 0;
  width: max-content;
  margin-top: 0.35rem;
  background: #fff;
  border: 1px solid rgba(15, 23, 42, 0.1);
  border-radius: var(--ut-radius-md);
  box-shadow:
    0 0 0 1px rgba(15, 23, 42, 0.03),
    0 4px 8px -2px rgba(15, 23, 42, 0.08),
    0 16px 40px rgba(15, 23, 42, 0.12);
  z-index: 1050;
}

@media (max-width: 991.98px) {
  .ut-navbar .ut-nav-user-toggle {
    max-width: none;
    width: 100%;
  }

  .ut-navbar .navbar-collapse {
    padding-bottom: 0.5rem;
  }

  .ut-navbar .navbar-nav .nav-link,
  .ut-navbar .dropdown-menu .dropdown-item {
    min-height: 2.75rem;
    display: flex;
    align-items: center;
  }

  .ut-navbar .dropdown-menu.ut-nav-user-menu {
    margin-top: 0.25rem;
    background: #fff;
    box-shadow:
      0 0 0 1px rgba(15, 23, 42, 0.04),
      0 6px 16px rgba(15, 23, 42, 0.1);
  }
}

/* 卡片（通用，与 ut-ui 配合） */
.ut-card {
  border: 1px solid var(--ut-border);
  border-radius: var(--ut-radius-md);
  box-shadow: var(--ut-shadow-card);
  background: #fff;
}

.ut-card .card-body {
  padding: 1.15rem 1.25rem;
}

/* 按钮 */
.btn-primary {
  background: var(--ut-primary);
  border-color: var(--ut-primary);
}

.btn-primary:hover {
  background: var(--ut-primary-dark);
  border-color: var(--ut-primary-dark);
}

/* 认证页背景 */
body.ut-auth-body {
  background: var(--ut-light-bg);
}

/* 状态圆点（详情等场景可选） */
.state-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.state-up { background: var(--ut-success); box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2); }
.state-down { background: var(--ut-danger); box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2); }
.state-unknown { background: var(--ut-unknown); }

/* 页脚 */
.ut-footer {
  background: #fff;
  border-top: 1px solid var(--ut-border);
}

/* 返回顶部 */
.ut-back-to-top {
  position: fixed;
  bottom: max(1.25rem, env(safe-area-inset-bottom, 0px));
  right: max(1.25rem, env(safe-area-inset-right, 0px));
  width: 48px;
  height: 48px;
  padding: 0;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  z-index: 1040;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: linear-gradient(145deg, var(--ut-primary) 0%, var(--ut-accent) 100%);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease, box-shadow 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.ut-back-to-top i {
  font-size: 1.5rem;
  line-height: 1;
}

.ut-back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.ut-back-to-top:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(37, 99, 235, 0.42);
}

.ut-back-to-top:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.45);
  outline-offset: 2px;
}

@media (max-width: 575.98px) {
  .ut-back-to-top {
    width: 44px;
    height: 44px;
  }

  .ut-back-to-top i {
    font-size: 1.35rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ut-back-to-top {
    transition: opacity 0.15s ease, visibility 0.15s ease;
  }

  .ut-back-to-top.visible:hover {
    transform: none;
  }
}