:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #1a2332;
    --bg-card-hover: #1f2b3d;
    --border: #2a3a4e;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.3);
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

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

html, body {
    height: 100%;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    -webkit-font-smoothing: antialiased;
}

/* Navigation */
.ooc-app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.ooc-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    height: 56px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.ooc-nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.ooc-logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--accent);
    background: rgba(59, 130, 246, 0.1);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.ooc-title {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.ooc-nav-links {
    display: flex;
    gap: 0.25rem;
}

.ooc-nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.15s ease;
}

.ooc-nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.ooc-nav-link.active {
    color: var(--accent);
    background: rgba(59, 130, 246, 0.1);
}

/* Main Content */
.ooc-main {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.ooc-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.25rem;
    margin-bottom: 1.5rem;
}

h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Home Page */
.ooc-home {
    max-width: 900px;
    margin: 2rem auto;
    text-align: center;
}

.ooc-home h1 {
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.ooc-home .ooc-subtitle {
    margin-bottom: 3rem;
}

.ooc-home-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.ooc-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    text-align: left;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.ooc-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
    transform: translateY(-2px);
}

.ooc-card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--accent);
}

.ooc-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Gauge / Readout styling */
.ooc-readout {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
}

.ooc-readout-label {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.ooc-readout-unit {
    font-size: 0.75em;
    color: var(--text-muted);
    margin-left: 0.25em;
}

/* Panel styling */
.ooc-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
}

.ooc-panel-header {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

/* Setpoint controls */
.ooc-setpoint-input {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    padding: 0.5rem 0.75rem;
    width: 100%;
    outline: none;
    transition: border-color 0.15s ease;
}

.ooc-setpoint-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

/* Chip visualization container */
.ooc-chip-canvas {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    width: 100%;
}

/* Mode tabs */
.ooc-mode-tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 0.75rem;
}

.ooc-mode-tab {
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
}

.ooc-mode-tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.ooc-mode-tab.active {
    color: var(--accent);
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.2);
}

/* Protocol blocks */
.ooc-block {
    border-left: 3px solid var(--border);
    padding: 0.5rem 0.75rem;
    margin: 0.25rem 0;
    border-radius: 0 6px 6px 0;
    background: var(--bg-card);
    transition: all 0.2s ease;
}

.ooc-block.active {
    border-left-color: var(--accent);
    background: rgba(59, 130, 246, 0.08);
    box-shadow: 0 0 12px var(--accent-glow);
}

.ooc-block-name {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
}

.ooc-block-params {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Block tree */
.ooc-block-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.ooc-block-toggle {
    font-size: 0.75rem;
    color: var(--text-muted);
    width: 1rem;
}

.ooc-block-children {
    margin-left: 1rem;
    margin-top: 0.25rem;
}

.ooc-block-children.parallel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.5rem;
    margin-left: 0;
}

/* Experiment layout */
.ooc-experiment-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 1rem;
    margin-top: 1rem;
}

.ooc-experiment-sidebar {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* Protocol layout */
.ooc-protocol-layout {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.ooc-protocol-left {
    display: flex;
    flex-direction: column;
}

.ooc-protocol-right {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* Charts grid */
.ooc-charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.75rem;
}

.ooc-chart-slot {
    padding: 0.5rem;
    background: var(--bg-primary);
    border-radius: 6px;
    border: 1px solid var(--border);
}

/* Setpoint grid */
.ooc-setpoint-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.ooc-setpoint-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.ooc-setpoint-row {
    display: flex;
    gap: 0.5rem;
}

.ooc-setpoint-row .ooc-setpoint-input {
    flex: 1;
}

/* Buttons */
.ooc-btn {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    transition: all 0.15s ease;
}

.ooc-btn:hover:not(:disabled) {
    background: var(--bg-card-hover);
    border-color: var(--accent);
}

.ooc-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.ooc-btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.ooc-btn-primary:hover:not(:disabled) {
    background: #2563eb;
}

.ooc-btn-danger {
    border-color: var(--danger);
    color: var(--danger);
}

.ooc-btn-danger:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.1);
}

.ooc-setpoint-btn {
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--accent);
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    transition: all 0.15s ease;
}

.ooc-setpoint-btn:hover {
    background: rgba(59, 130, 246, 0.2);
}

/* Slider */
.ooc-slider {
    width: 100%;
    accent-color: var(--accent);
}

.ooc-slider-value {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Protocol controls */
.ooc-protocol-controls {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.ooc-protocol-buttons {
    display: flex;
    gap: 0.5rem;
}

.ooc-protocol-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.ooc-protocol-state {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
}

.ooc-protocol-state.running { color: var(--success); }
.ooc-protocol-state.loaded { color: var(--accent); }
.ooc-protocol-state.idle { color: var(--text-muted); }
.ooc-protocol-state.error { color: var(--danger); }

/* Page content fade-in */
.ooc-main > * {
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}