:root {
  --vp-c-brand-1: #7bc5e4;
  --vp-c-brand-2: #5ab5d4;
  --vp-c-brand-3: #2b8fb8;
  --vp-c-brand-soft: #a8d8eb;
  --vp-c-bg: #ffffff;
  --vp-c-bg-alt: #f6f6f7;
  --vp-c-bg-elv: rgba(255, 255, 255, 0.78);
  --vp-c-text-1: #213547;
  --vp-c-text-2: #476582;
  --vp-c-text-3: #8a9eb5;
  --vp-c-divider: #dfe3e8;
  --vp-c-surface: #ffffff;
  --vp-shadow-1: 0 1px 2px rgba(10, 18, 30, 0.08);
  --vp-shadow-2: 0 8px 30px rgba(10, 18, 30, 0.08);
}

[data-theme="dark"] {
  --vp-c-brand-1: #47caff;
  --vp-c-brand-2: #2bb8eb;
  --vp-c-brand-3: #1a5a7f;
  --vp-c-brand-soft: #7ed8f0;
  --vp-c-bg: #11161d;
  --vp-c-bg-alt: #0f1318;
  --vp-c-bg-elv: rgba(15, 19, 24, 0.8);
  --vp-c-text-1: #d8dee9;
  --vp-c-text-2: #9fb1c7;
  --vp-c-text-3: #7487a1;
  --vp-c-divider: #2b3440;
  --vp-c-surface: #1a212b;
  --vp-shadow-1: 0 1px 2px rgba(0, 0, 0, 0.34);
  --vp-shadow-2: 0 12px 35px rgba(0, 0, 0, 0.3);
}

html,
body {
  background: var(--vp-c-bg);
  color: var(--vp-c-text-1);
}

body {
  transition: background-color 0.25s ease, color 0.25s ease;
}

.vp-shell-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(10px);
  background: var(--vp-c-bg-elv);
  border-bottom: 1px solid var(--vp-c-divider);
}

.vp-shell-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.vp-shell-brand {
  color: var(--vp-c-text-1);
  font-weight: 700;
  letter-spacing: 0.2px;
  text-decoration: none;
}

.vp-shell-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

.vp-shell-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-left: auto;
}

.vp-shell-link {
  color: var(--vp-c-text-2);
  text-decoration: none;
  font-size: 0.95rem;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 6px 10px;
  transition: all 0.2s ease;
}

.vp-shell-link:hover {
  color: var(--vp-c-text-1);
  border-color: var(--vp-c-divider);
  background: var(--vp-c-bg-alt);
}

.vp-shell-link.is-active {
  color: var(--vp-c-brand-3);
  border-color: color-mix(in srgb, var(--vp-c-brand-3) 30%, var(--vp-c-divider));
  background: color-mix(in srgb, var(--vp-c-brand-1) 12%, transparent);
}

@media (max-width: 800px) {
  .vp-shell-header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .vp-shell-actions {
    width: 100%;
    justify-content: space-between;
  }
}