/* Modern Clean Style Variables */
:root {
  /* Light Mode (Default) - Inspired by Apple & Vue */
  --bg-body: #ffffff;
  --bg-secondary: #f3f4f6; /* gray-100 */
  --bg-card: #ffffff;
  --text-primary: #111827; /* gray-900 */
  --text-secondary: #4b5563; /* gray-600 */
  --border-color: #e5e7eb; /* gray-200 */
  --primary-color: #165DFF;
  --accent-color: #36CFC9;
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --header-bg: rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] {
  /* Dark Mode - Inspired by GitHub Dark Dimmed */
  --bg-body: #0d1117;
  --bg-secondary: #161b22;
  --bg-card: #161b22; /* or #0d1117 with border */
  --text-primary: #c9d1d9;
  --text-secondary: #8b949e;
  --border-color: #30363d;
  --primary-color: #58a6ff;
  --accent-color: #39d353;
  --card-shadow: none;
  --header-bg: rgba(13, 17, 23, 0.8);
}

/* Base transitions */
body {
  background-color: var(--bg-body);
  color: var(--text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Utility Classes for Compatibility & Clean Design */
.glass-effect {
  background-color: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.card-base {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: all 0.2s ease;
}

[data-theme="light"] .card-base {
  box-shadow: var(--card-shadow);
  border-color: transparent; /* Cleaner look in light mode, or keep border for consistency */
  border: 1px solid #f3f4f6;
}

[data-theme="light"] .card-base:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
}

[data-theme="dark"] .card-base:hover {
  border-color: #8b949e;
}

/* Buttons */
.btn-primary {
  background-color: var(--primary-color);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 500;
  transition: opacity 0.2s;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-secondary {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 500;
  transition: all 0.2s;
}

.btn-secondary:hover {
  border-color: var(--text-secondary);
  background-color: var(--bg-secondary);
}

/* Links */
a {
  color: inherit;
  text-decoration: none;
}

.link-hover:hover {
  color: var(--primary-color);
}

/* Icon Containers */
.icon-box {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

/* Text Colors */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-accent { color: var(--primary-color); }