:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --accent-blue: #3b82f6;
    --accent-blue-glow: rgba(59, 130, 246, 0.5);
    
    --accent-green: #10b981;
    --accent-green-glow: rgba(16, 185, 129, 0.5);
    
    --accent-red: #ef4444;
    --accent-red-glow: rgba(239, 68, 68, 0.5);
    
    --border-color: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 20px;
}

.dashboard-container {
    width: 100%;
    max-width: 1000px;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 4px;
}

/* Status Badge */
.status-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 50px;
    background: var(--bg-card);
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.status-badge.connected {
    box-shadow: 0 0 15px var(--accent-green-glow);
    border: 1px solid var(--accent-green);
    color: var(--accent-green);
}

.status-badge.disconnected {
    box-shadow: 0 0 15px var(--accent-red-glow);
    border: 1px solid var(--accent-red);
    color: var(--accent-red);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.connected .dot {
    background-color: var(--accent-green);
    box-shadow: 0 0 8px var(--accent-green);
}

.disconnected .dot {
    background-color: var(--accent-red);
    box-shadow: 0 0 8px var(--accent-red);
}

/* Panels */
.panel {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
}

.panel h2 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Energy Grid */
.energy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.energy-card {
    background: var(--bg-dark);
    padding: 20px;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease;
}

.energy-card:hover {
    transform: translateY(-2px);
}

.energy-card .label {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.energy-card .value {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text-main);
}

.energy-card .unit {
    color: var(--accent-blue);
    font-weight: 600;
    margin-top: 5px;
}

.energy-card.highlight {
    background: linear-gradient(135deg, var(--bg-dark) 0%, rgba(59, 130, 246, 0.15) 100%);
    border-color: rgba(59, 130, 246, 0.3);
}

.energy-card.highlight .value {
    color: var(--accent-blue);
}

/* Relays Grid */
.relays-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

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

.btn-global {
    background: var(--bg-dark);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    transition: all 0.2s ease;
}

.btn-global:hover {
    background: var(--bg-card-hover);
}

.btn-global.on:active {
    background: var(--accent-green);
    border-color: var(--accent-green);
}

.btn-global.off:active {
    background: var(--accent-red);
    border-color: var(--accent-red);
}

.relays-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 15px;
}

.relay-btn {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 20px 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-main);
}

.relay-btn:hover {
    background: var(--bg-card-hover);
    transform: scale(1.02);
}

.relay-btn .r-num {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.relay-btn .r-icon {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #334155;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.relay-btn .r-state {
    font-weight: 700;
    font-size: 1.1rem;
}

/* Relay ON State */
.relay-btn.on {
    border-color: var(--accent-green);
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.15);
}

.relay-btn.on .r-icon {
    background: var(--accent-green);
    box-shadow: 0 0 15px var(--accent-green-glow);
}

.relay-btn.on .r-state {
    color: var(--accent-green);
}

/* Relay OFF State */
.relay-btn.off {
    border-color: var(--border-color);
}

.relay-btn.off .r-icon {
    background: var(--accent-red);
}

.relay-btn.off .r-state {
    color: var(--text-muted);
}

@media (max-width: 600px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .relays-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .energy-grid {
        grid-template-columns: 1fr 1fr;
    }
}