:root {
  --header-bg-color: #ffe6e1; /* light pastel peach */
  --button-bg: #000;          /* black button background for contrast */
  --button-color: #fff;       /* white button text */
  --button-shadow: #ff33cc;
}

/* Header base styles */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--header-bg-color);
  padding: 10px 1rem;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 10000;
  height: 80px;             /* fixed header height */
  overflow: visible;        /* allow logo overflow */
}

/* Logo image */
.logo-link {
  display: inline-block;
}

.logo-image {
  height: 120px;            /* larger logo */
  margin-top: -20px;        /* lift to center visually */
  vertical-align: middle;
  object-fit: contain;
}

/* Toggle mode button */
.toggle-mode {
  padding: 8px 16px;
  background: var(--button-bg);
  color: var(--button-color);
  border-radius: 20px;
  border: none;
  cursor: pointer;
  font-weight: bold;
  box-shadow: 0 0 10px var(--button-shadow);
  white-space: nowrap;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.toggle-mode:hover,
.toggle-mode:focus {
  background: #ff33cc;
  color: #fff;
  box-shadow: 0 0 20px var(--button-shadow);
  outline: none;
}

.toggle-mode:focus-visible {
  outline: 2px solid var(--button-shadow);
  outline-offset: 2px;
}

/* Responsive */
@media (max-width: 480px) {
  .site-header {
    padding: 10px 0.5rem;
  }
  .toggle-mode {
    padding: 6px 12px;
    font-size: 14px;
  }

  /* Smaller logo on small screens */
  .logo-image {
    height: 60px;
    margin-top: 0;
  }
}

/* Add padding-top to body so header doesn't overlap content */
body {
  padding-top: 80px;
}