:root {
    /* Color Palette */
    --primary-color: #2c3e50;    /* Dark Blue-Gray */
    --secondary-color: #34495e;  /* Slightly Lighter Blue-Gray */
    --accent-color-shelly: #3498db; /* Blue (Shelly Accent) */
    --accent-color-elan: #27ae60;   /* Green (ELAN Accent) */
    --success-color: #2ecc71;    /* Bright Green */
    --warning-color: #f39c12;    /* Orange */
    --danger-color: #e74c3c;     /* Red */
    --light-color: #f8f9fa;      /* Very Light Gray */
    --dark-color: #343a40;       /* Dark Gray */
    --text-color: #333;
    --text-color-light: #f8f9fa;
    --text-color-muted: #6c757d; /* Gray */
    --border-color: #e9ecef;

    /* Layout & Effects */
    --border-radius: 10px; /* Slightly smaller radius */
    --card-shadow: 0 4px 15px rgba(0,0,0,0.07);
    --card-shadow-hover: 0 6px 25px rgba(0,0,0,0.1);
    --transition-speed: 0.3s;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f7f9;
    color: var(--text-color);
    padding: 1.5rem;
}

header, footer {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-color-muted);
}

h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

h2 { /* Titles for device sections */
    color: var(--secondary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.4rem; /* Slightly larger */
}

hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2rem 0;
}

/* Connection Status */
#connection-status {
    font-weight: bold;
    transition: color var(--transition-speed) ease;
    padding: 0.4rem 0.8rem;
    display: inline-block;
    border-radius: 50px;
    font-size: 0.9em;
    background-color: var(--light-color);
    border: 1px solid transparent;
}

#connection-status.connected {
    color: var(--success-color);
    border-color: var(--success-color);
    background-color: #eafaf1;
}

#connection-status.disconnected {
    color: var(--danger-color);
    border-color: var(--danger-color);
    background-color: #fdedec;
}

/* Dashboard Layout */
.dashboard-section { /* Container for each device type */
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr)); /* Slightly wider min */
    gap: 1.75rem; /* Increased gap */
    margin: 0 auto;
    max-width: 1600px;
}

/* --- Base Device Card Style --- */
.device-card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    overflow: visible;
    transition: transform var(--transition-speed) ease,
                box-shadow var(--transition-speed) ease;
    border-left: 6px solid transparent;
}

.device-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}

/* Specific Card Types */
.shelly-card {
    border-left-color: var(--accent-color-shelly);
}
.shelly-card .device-header {
    background-color: var(--secondary-color);
}

.elan-card {
    border-left-color: var(--accent-color-elan);
}
.elan-card .device-header {
    background-color: var(--accent-color-elan);
}

.device-header {
    color: var(--text-color-light);
    padding: 0.8rem 1.2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.device-name {
    font-weight: 600;
    font-size: 1.05rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: calc(100% - 35px); /* Ensure space for indicator */
}

.status-indicator { /* Online/Offline dot */
    width: 14px; /* Slightly larger */
    height: 14px;
    border-radius: 50%;
    flex-shrink: 0;
    border: 2px solid rgba(255, 255, 255, 0.8); /* White border */
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.status-indicator.online {
    background-color: var(--success-color);
}

.status-indicator.offline {
    background-color: var(--danger-color);
}

.device-content {
    padding: 1rem 1.2rem;
}

/* Key Info Blocks (Relay/Curtailment Display) */
.key-info-block {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding: 0.8rem 1rem; /* Increased padding */
    border-radius: 8px;
    background-color: var(--light-color);
    border: 1px solid var(--border-color);
}

.key-info-block .info-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.key-info-block .icon {
    font-size: 1.2em;
    color: var(--text-color-muted);
    width: 22px; /* Fixed width */
    text-align: center;
}

.key-info-block .label {
    font-weight: 500;
    color: var(--primary-color);
}

.key-info-block .state-text {
    font-weight: bold;
}

/* Specific states for key info */
.key-info-block.relay-on .icon, .key-info-block.relay-on .state-text { color: var(--success-color); }
.key-info-block.relay-off .icon, .key-info-block.relay-off .state-text { color: var(--danger-color); }
.key-info-block.curtailment-active .icon { color: var(--warning-color); }
.key-info-block.curtailment-active .state-text { color: var(--warning-color); }
.key-info-block.curtailment-inactive { opacity: 0.8; }
.key-info-block.curtailment-inactive .icon { color: var(--success-color); } /* Show solar panel green when inactive */
.key-info-block.curtailment-inactive .state-text { color: var(--success-color); }

/* Shelly Toggle Button */
.toggle-button {
    padding: 0.4rem 0.8rem;
    border: none;
    border-radius: 6px;
    background-color: var(--accent-color-shelly);
    color: white;
    font-size: 0.8rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s ease;
}
.toggle-button:hover { background-color: #2980b9; }

/* Section Styles (Collapsible) */
.section {
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}
.section:last-child { border-bottom: none; margin-bottom: 0; }

.section-header {
    cursor: pointer;
    padding: 0.7rem 0; /* Increased padding */
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--primary-color);
    transition: background-color 0.2s ease;
}
.section-header:hover { background-color: rgba(0,0,0,0.02); }

.section-content {
    overflow: hidden;
    max-height: 0;
    transition: max-height var(--transition-speed) ease-out,
                padding var(--transition-speed) ease-out;
    padding: 0 0.5rem;
}

.section-expanded .section-content {
    max-height: 1000px;
    padding: 0.5rem 0.5rem 1rem 0.5rem;
}

.section-header .icon {
    transition: transform var(--transition-speed) ease;
    color: var(--text-color-muted);
}
.section-expanded .section-header .icon { transform: rotate(180deg); }

/* Metrics Display - Using Grid */
.metrics {
    display: grid; /* Changed from flex */
    grid-template-columns: 1fr; /* Single column layout */
    gap: 0.6rem;
}

.metric {
    display: grid; /* Use grid for each key-value pair */
    grid-template-columns: auto 1fr; /* Key takes auto width, value takes rest */
    align-items: baseline; /* Align text nicely */
    gap: 0 1rem; /* Gap between key and value column */
    padding: 0.3rem 0; /* Reduced padding */
}

.metric-key {
    grid-column: 1 / 2; /* Key in first column */
    color: var(--text-color-muted);
    font-size: 0.9em;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    white-space: nowrap; /* Prevent key text wrapping */
}

.info-icon {
    color: var(--accent-color-shelly); /* Keep blue for consistency? */
    cursor: help;
    font-size: 0.85em;
}

.metric-value {
    grid-column: 2 / 3; /* Value in second column */
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    background-color: var(--light-color);
    padding: 0.25em 0.6em;
    border-radius: 4px;
    font-size: 0.9em;
    word-break: break-all;
    text-align: right;
    color: var(--primary-color);
    justify-self: end; /* Align value to the right */
    width: fit-content; /* Ensure background only covers content */
    max-width: 100%; /* Prevent overflow */
}

/* JSON Formatting */
.json-preview {
    grid-column: 1 / -1; /* Span both columns */
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    font-size: 0.8em;
    max-height: 150px;
    overflow-y: auto;
    background: var(--light-color);
    padding: 0.75rem;
    border-radius: 6px;
    white-space: pre-wrap;
    word-break: break-all;
    margin-top: 0.25rem;
    border: 1px solid var(--border-color);
}

.timestamp {
    grid-column: 1 / -1; /* Span both columns if inside .metrics */
    color: var(--text-color-muted);
    font-size: 0.8em;
    text-align: right;
    margin-top: 1rem;
    padding-top: 0.5rem;
    border-top: 1px dashed var(--border-color); /* Separator */
}

/* --- Tooltip --- */
.tooltip {
    position: relative; 
    display: inline-flex; 
    align-items: center;
}

.tooltip .tooltip-text {
    visibility: hidden;
    opacity: 0;
    /* Removed fixed width, use max-width */
    max-width: 270px; /* Adjusted max-width */
    width: max-content; /* Auto width */
    background-color: var(--dark-color);
    color: var(--text-color-light);
    text-align: left; 
    padding: 0.75rem 1rem; 
    border-radius: 8px;
    position: absolute;
    z-index: 10; /* Ensure it's above other content */
    bottom: 150%; /* Increased distance slightly */
    left: 50%;
    transform: translateX(-50%); 
    transition: opacity var(--transition-speed) ease, visibility var(--transition-speed) ease;
    font-size: 0.85rem;
    line-height: 1.4;
    box-shadow: 0 3px 12px rgba(0,0,0,0.25); /* Slightly stronger shadow */
    pointer-events: none; 
    white-space: normal;       /* Allow text to wrap */
    overflow-wrap: break-word; /* Break long words if necessary */
}
.tooltip .tooltip-text::after { /* Arrow */
    content: "";
    position: absolute;
    top: 100%; left: 50%;
    margin-left: -6px; 
    border-width: 6px;
    border-style: solid;
    border-color: var(--dark-color) transparent transparent transparent;
}
.tooltip:hover .tooltip-text { visibility: visible; opacity: 1; }
/* Empty message */
.empty-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    color: var(--text-color-muted);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    body { padding: 1rem; }
    h1 { font-size: 1.5rem; }
    .dashboard-section { grid-template-columns: 1fr; gap: 1rem;}
    .device-name { font-size: 1rem; }
    .metric {
        grid-template-columns: 1fr; /* Stack key/value */
        gap: 0.2rem 0;
    }
    .metric-value { justify-self: start; text-align: left; } /* Align left on mobile */
    .tooltip .tooltip-text { max-width: 200px; }
}

@media (max-width: 480px) {
    .key-info-block { flex-direction: column; align-items: flex-start;}
    .toggle-button { margin-top: 0.5rem; align-self: flex-start;}
    h2 { font-size: 1.2rem; }
}