:root {
  --bg-dark: #0a0a12;
  --bg-panel: #14141e;
  --bg-panel-hover: #1e1e2a;
  --neon-blue: #00f3ff;
  --neon-purple: #bc13fe;
  --neon-red: #ff003c;
  --neon-green: #0aff00;
  --text-main: #ffffff;
  --text-muted: #8888aa;
  --border-color: #2a2a3a;
  --font-main: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --header-height: 60px;
  --sidebar-width: 240px;
  --sidebar-collapsed-width: 60px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-main);
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  text-decoration: none;
  color: inherit;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.font-mono {
  font-family: var(--font-mono);
}

.text-neon-blue { color: var(--neon-blue); text-shadow: 0 0 10px rgba(0, 243, 255, 0.5); }
.text-neon-purple { color: var(--neon-purple); text-shadow: 0 0 10px rgba(188, 19, 254, 0.5); }
.text-neon-red { color: var(--neon-red); text-shadow: 0 0 10px rgba(255, 0, 60, 0.5); }

/* Layout */
.app-container {
  display: flex;
  flex: 1;
  margin-top: var(--header-height);
}

.main-content {
  flex: 1;
  padding: 20px;
  margin-left: var(--sidebar-width);
  transition: margin-left 0.3s ease;
}

@media (max-width: 768px) {
  .main-content {
    margin-left: 0;
    padding-bottom: 80px; /* Space for bottom nav */
  }
}

/* Components */
.card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 15px;
  margin-bottom: 15px;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  border-color: var(--neon-blue);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

.card-title {
  font-size: 0.9rem;
  color: var(--neon-blue);
  font-family: var(--font-mono);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--neon-blue);
  color: var(--neon-blue);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
  text-transform: uppercase;
}

.btn:hover {
  background: rgba(0, 243, 255, 0.1);
  box-shadow: 0 0 15px rgba(0, 243, 255, 0.3);
}

.btn-primary {
  background: var(--neon-blue);
  color: #000;
}

.btn-primary:hover {
  background: #fff;
  box-shadow: 0 0 20px var(--neon-blue);
}

/* HUD Lines */
.hud-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
  margin: 10px 0;
}

/* Utilities */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-cols-2 { grid-template-columns: 1fr; }
}

.hidden { display: none; }