:root {
  /* Default Dark Sage Green Theme */
  --bg-color: #0f1a14;
  --surface-color: rgba(20, 38, 28, 0.7);
  --border-color: rgba(103, 128, 99, 0.2);
  --text-color: #e8f0e8;
  --accent-color: #678063;
  --accent-glow: #22c55e;

  --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;
}

[data-theme="light"] {
  --bg-color: #f4f7f4;
  --surface-color: #ffffff;
  --border-color: rgba(103, 128, 99, 0.25);
  --text-color: #14241a;
  --accent-color: #4d6849;
  --accent-glow: #2e7d32;
}

[data-contrast="high"] {
  /* High Contrast overrides depending on theme */
}

[data-theme="light"][data-contrast="high"] {
  --border-color: #2563eb; /* Sharp blue borders */
  --text-color: #000000;
  --bg-color: #ffffff;
  --accent-color: #0000ee;
  --outline-color: #2563eb;
}

:root:not([data-theme="light"])[data-contrast="high"] {
  --bg-color: #050a07;
  --surface-color: #000000;
  --border-color: #facc15; /* Sharp yellow borders */
  --text-color: #ffffff;
  --accent-color: #facc15;
  --accent-glow: #facc15;
  --outline-color: #facc15;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--accent-color);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

[data-contrast="high"] * {
  outline: 2px solid transparent;
}
[data-contrast="high"] *:focus {
  outline-color: var(--outline-color, #facc15);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Fluid Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 40px;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--text-color);
}

.navbar-links {
  display: flex;
  gap: 20px;
}

.navbar-links a {
  color: var(--text-color);
}

.navbar-controls {
  display: flex;
  gap: 10px;
}

.btn {
  background-color: var(--surface-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  cursor: pointer;
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.btn:hover {
  border-color: var(--accent-color);
}