:root {
  --gradient-start: #5d68ff;
  --gradient-end: #7cc4ff;
  --card-radius: 18px;
  --card-shadow: 0 20px 45px rgba(59, 94, 255, 0.12);
  --bg-page: radial-gradient(80% 80% at 50% 0%, #dfe9ff 0%, #f5f7ff 40%, #fdfdff 100%);
  --bg-surface: #ffffff;
  --text-primary: #1f2b3d;
  --text-muted: #707a92;
  color-scheme: light dark;
}

/* Layout shell */
body.page-body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg-page);
  font-family: 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.main-wrapper {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 4rem;
}

/* Hero block */
.hero {
  margin-bottom: 2.5rem;
}

.hero-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 25px rgba(94, 113, 255, 0.35);
}

.icon-globe {
  width: 50px;
  height: 50px;
  object-fit: contain;
}

.hero-title {
  font-weight: 600;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
}

.update-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  background: rgba(22, 120, 255, 0.08);
  font-size: 0.95rem;
  color: #0c4cb8;
}

/* Tips section */
.tips-card {
  border-radius: var(--card-radius);
  padding: 1.2rem 1.5rem;
  background: var(--bg-surface);
  box-shadow: 0 12px 30px rgba(59, 94, 255, 0.08);
  color: var(--text-primary);
}

.tips-card .text-muted {
  color: var(--text-muted) !important;
}

/* Domain list & cards */
.domain-stack {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.domain-card {
  border-radius: var(--card-radius);
  background: var(--bg-surface);
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.domain-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 25px 50px rgba(59, 94, 255, 0.18);
}

/* Status badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
}

.badge-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.badge-dot.online {
  background-color: #16a34a;
}

.badge-dot.offline {
  background-color: #dc3545;
}

.badge-dot.checking {
  background-color: #ffc107;
}

.status-online {
  background: rgba(22, 163, 74, 0.12);
  color: #0f7b3b;
}

.status-offline {
  background: rgba(220, 53, 69, 0.12);
  color: #b9192d;
}

.status-checking {
  background: rgba(255, 193, 7, 0.15);
  color: #a06b00;
}

/* Primary action */
.domain-card .btn-primary {
  border-radius: 999px;
  padding: 0.6rem 1.25rem;
  font-weight: 600;
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
  border: none;
}

/* Footer */
.footer {
  margin-top: auto;
  background: transparent;
  color: var(--text-muted);
  text-align: center;
  padding: 2rem 1rem 2.5rem;
  font-size: 0.95rem;
}

.footer-copyright {
  display: block;
}

/* Responsive tweaks */
@media (max-width: 576px) {
  .footer {
    padding: 2.25rem 1.5rem 3.25rem;
    font-size: 0.9rem;
    line-height: 1.6;
  }
}

/* Dark theme */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: radial-gradient(90% 80% at 50% -10%, #1f2540 0%, #141726 60%, #111320 100%);
    --bg-surface: #1d2231;
    --text-primary: #f6f8ff;
    --text-muted: #c5cffb;
    --card-shadow: 0 15px 45px rgba(0, 0, 0, 0.55);
  }

  .hero-icon {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.45);
  }

  .tips-card {
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
  }

  .hero-subtitle {
    color: #dfe6ff;
  }

  .domain-card:hover {
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.6);
  }

  .update-pill {
    background: rgba(255, 255, 255, 0.12);
    color: #d2d8ff;
  }

  .status-online {
    background: rgba(34, 197, 94, 0.15);
    color: #69ffb3;
  }

  .status-offline {
    background: rgba(248, 113, 113, 0.25);
    color: #ff9aa4;
  }

  .status-checking {
    background: rgba(250, 204, 21, 0.2);
    color: #ffe89b;
  }

  .footer,
  .footer-links a {
    color: var(--text-muted);
  }

  .footer-copyright {
    color: #dfe3ff;
  }
}