:root {
    --bg-main: #0F172A;
    --bg-card: rgba(30, 41, 59, 0.7);
    --border-color: rgba(51, 65, 85, 0.8);
    --text-main: #F8FAFC;
    --text-muted: #94A3B8;
    
    --color-closed: #10B981;
    --color-open: #EF4444;
    --color-half-open: #F59E0B;
    
    --font-mono: 'JetBrains Mono', monospace;
    --border-radius: 8px;
    --transition-speed: 0.3s;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-mono);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    margin-bottom: 2rem;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    background: linear-gradient(to right, #60A5FA, #A78BFA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-muted);
}

.dashboard {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 1.5rem;
}

@media (max-width: 1024px) {
    .dashboard {
        grid-template-columns: 1fr;
    }
}

.panel-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.panel-card h2 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

/* State Machine Visualization */
.states-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 1rem 0;
}

.state {
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0.4;
    transition: all var(--transition-speed);
    padding: 1rem;
    border-radius: var(--border-radius);
    width: 100%;
    background: rgba(0,0,0,0.2);
    border: 1px solid transparent;
}

.state.active {
    opacity: 1;
    transform: scale(1.05);
}

.state-closed.active {
    border-color: var(--color-closed);
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.2);
}

.state-open.active {
    border-color: var(--color-open);
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.2);
}

.state-half-open.active {
    border-color: var(--color-half-open);
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.2);
}

.state-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin-bottom: 0.5rem;
    transition: all var(--transition-speed);
}

.state-closed .state-icon { background: var(--color-closed); }
.state-open .state-icon { background: var(--color-open); }
.state-half-open .state-icon { background: var(--color-half-open); }

.state-closed.active .state-icon { box-shadow: 0 0 15px var(--color-closed); }
.state-open.active .state-icon { box-shadow: 0 0 15px var(--color-open); }
.state-half-open.active .state-icon { box-shadow: 0 0 15px var(--color-half-open); }

.state-label {
    font-weight: bold;
    font-size: 1.1rem;
    letter-spacing: 1px;
}
.state-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Controls */
.config-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

input[type="range"] {
    width: 100%;
    accent-color: #60A5FA;
}

input[type="number"], select {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.5rem;
    border-radius: 4px;
    font-family: inherit;
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
}

.danger-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn {
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 4px;
    font-family: inherit;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.btn.primary {
    background: #3B82F6;
    color: white;
}
.btn.primary:hover {
    background: #2563EB;
}

.btn.secondary {
    background: #475569;
    color: white;
}
.btn.secondary:hover {
    background: #334155;
}

.btn.secondary.outline {
    background: transparent;
    border: 1px solid #475569;
}
.btn.secondary.outline:hover {
    background: rgba(71, 85, 105, 0.2);
}

.btn.danger.outline {
    background: transparent;
    border: 1px solid var(--color-open);
    color: var(--color-open);
}
.btn.danger.outline:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* Metrics */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}
@media (max-width: 600px) {
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.metric {
    background: rgba(0,0,0,0.2);
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--border-color);
}

.metric-value {
    display: block;
    font-size: 1.75rem;
    font-weight: bold;
    margin-bottom: 0.25rem;
    color: #E2E8F0;
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Timeline */
.canvas-container {
    width: 100%;
    height: 200px;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
}
canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* Logs */
.logs-container {
    height: 300px;
    overflow-y: auto;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.log-entry {
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    border-left: 3px solid transparent;
    background: rgba(255,255,255,0.03);
    display: flex;
    justify-content: space-between;
}

.log-success {
    border-left-color: var(--color-closed);
}

.log-failure {
    border-left-color: var(--color-open);
}

.log-rejected {
    border-left-color: var(--color-open);
    opacity: 0.7;
}

.log-state-change {
    border-left-color: #60A5FA;
    background: rgba(96, 165, 250, 0.1);
    font-weight: bold;
}

.log-time {
    color: var(--text-muted);
}

/* Scrollbar styles */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.1);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #475569;
}