:root {
  /* Pulse Design System - Light Theme */
  --bg-primary: oklch(0.98 0.01 240);
  --bg-secondary: oklch(0.95 0.01 240);
  --bg-pane: oklch(1 0 0);
  --text-primary: oklch(0.25 0.02 240);
  --text-secondary: oklch(0.45 0.03 240);
  --accent-primary: oklch(0.60 0.15 240); /* Electric Blue */
  --accent-success: oklch(0.75 0.15 150); /* Emerald */
  --accent-warning: oklch(0.80 0.15 70);  /* Amber */
  --border-color: oklch(0.9 0.01 240);
  
  --shadow-sm: 0 2px 8px oklch(0 0 0 / 0.05);
  --shadow-md: 0 8px 24px oklch(0 0 0 / 0.08);
  
  --header-height: 60px;
  --font-sans: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

[data-theme="dark"] {
  --bg-primary: oklch(0.15 0.02 240);
  --bg-secondary: oklch(0.12 0.02 240);
  --bg-pane: oklch(0.18 0.02 240);
  --text-primary: oklch(0.95 0.01 240);
  --text-secondary: oklch(0.75 0.02 240);
  --accent-primary: oklch(0.70 0.15 200); /* Cyan */
  --border-color: oklch(0.25 0.02 240);
  
  --shadow-sm: 0 2px 8px oklch(0 0 0 / 0.2);
  --shadow-md: 0 8px 24px oklch(0 0 0 / 0.4);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
              color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.noise-texture::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 9999;
}

/* Top Navigation */
.top-nav {
  height: var(--header-height);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-pane);
  z-index: 100;
}

.logo {
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.logo span {
  font-weight: 400;
  color: var(--text-secondary);
  margin-left: 0.1rem;
}

.project-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-success);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-success);
}

/* Main Layout */
.split-pane {
  flex: 1;
  display: grid;
  grid-template-columns: 400px 1fr;
  overflow: hidden;
}

.left-pane {
  border-right: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  display: flex;
  flex-direction: column;
}

.right-pane {
  background-color: var(--bg-primary);
  overflow-y: auto;
}

/* Common UI Elements */
button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  transition: all 0.2s ease;
}

.badge {
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

@media (max-width: 900px) {
  .split-pane {
    grid-template-columns: 1fr;
    overflow-y: auto;
  }
  .left-pane {
    height: 500px;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
}