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

:root {
    --primary-color: #00a0e9;
    --secondary-color: #00c0f0;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --danger-color: #f44336;
    --dark-bg: #1e1e1e;
    --panel-bg: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border-color: #404040;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1e1e1e 0%, #2d2d2d 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 30px;
}

h1 {
    font-size: 28px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 15px;
}

#status {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
}

#status.connected {
    color: var(--success-color);
}

#status.disconnected {
    color: var(--danger-color);
}

/* Main Content */
.main-content {
    display: grid;
    gap: 20px;
}

/* Panels */
.panel {
    background: var(--panel-bg);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.panel h2 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--secondary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.panel h3 {
    font-size: 18px;
    margin: 20px 0 15px 0;
    color: var(--text-primary);
}

.panel h4 {
    font-size: 16px;
    margin: 15px 0 10px 0;
    color: var(--text-secondary);
}

/* Connection Info */
.connection-info {
    display: grid;
    gap: 10px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 8px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 5px;
}

.info-row label {
    color: var(--text-secondary);
    font-weight: 500;
}

.info-row span {
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
    overflow-x: auto;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 10px 20px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

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

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Forms */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-secondary);
    font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="datetime-local"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 160, 233, 0.2);
}

textarea {
    resize: vertical;
    min-height: 100px;
    font-family: 'Courier New', monospace;
}

/* Buttons */
button {
    cursor: pointer;
    transition: all 0.3s;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: 5px;
    padding: 10px 20px;
}

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

.btn-primary:hover {
    background: #0090d0;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 160, 233, 0.3);
}

.btn-secondary {
    background: #555;
    color: white;
}

.btn-secondary:hover {
    background: #666;
}

.btn-control {
    background: rgba(0, 160, 233, 0.1);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-control:hover {
    background: var(--primary-color);
    color: white;
}

/* Control Grid */
.control-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin: 15px 0;
}

/* TSN Sections */
.tsn-section {
    background: rgba(0, 0, 0, 0.2);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.gate-control-list {
    margin-top: 15px;
}

#gateControlEntries {
    margin-bottom: 10px;
}

.gate-entry {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
    align-items: center;
}

.gate-entry input {
    flex: 1;
}

.gate-entry button {
    padding: 5px 10px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 3px;
}

/* YAML Editor */
.yaml-editor {
    margin-bottom: 15px;
}

#yamlInput {
    width: 100%;
    min-height: 400px;
    background: #1a1a1a;
    color: #9cdcfe;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
    line-height: 1.5;
    tab-size: 2;
}

.yaml-actions {
    display: flex;
    gap: 10px;
}

/* CoAP Section */
.coap-section {
    background: rgba(0, 0, 0, 0.2);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.yang-tree {
    background: #1a1a1a;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 15px;
    min-height: 300px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    overflow: auto;
}

/* Protocol Info */
.protocol-info {
    background: rgba(0, 0, 0, 0.3);
    padding: 15px;
    border-radius: 5px;
    font-size: 14px;
}

.protocol-info code {
    display: block;
    background: #1a1a1a;
    padding: 10px;
    margin: 10px 0;
    border-radius: 3px;
    color: #9cdcfe;
    font-family: 'Consolas', 'Monaco', monospace;
}

.protocol-info ul {
    margin-left: 20px;
    margin-top: 10px;
}

.protocol-info li {
    margin: 5px 0;
    color: var(--text-secondary);
}

/* Monitor */
.monitor-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    align-items: center;
}

.monitor-controls label {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--text-secondary);
    font-size: 14px;
}

.monitor-log {
    background: #1a1a1a;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 10px;
    height: 400px;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 12px;
}

.log-entry {
    margin-bottom: 5px;
    padding: 5px;
    border-left: 3px solid transparent;
}

.log-entry.send {
    border-left-color: var(--primary-color);
    background: rgba(0, 160, 233, 0.1);
}

.log-entry.receive {
    border-left-color: var(--success-color);
    background: rgba(76, 175, 80, 0.1);
}

.log-entry.error {
    border-left-color: var(--danger-color);
    background: rgba(244, 67, 54, 0.1);
}

.log-timestamp {
    color: var(--text-secondary);
    margin-right: 10px;
}

.log-type {
    color: var(--primary-color);
    margin-right: 10px;
}

.log-data {
    color: var(--text-primary);
}

.log-hex {
    color: #9cdcfe;
    font-size: 11px;
    margin-top: 3px;
}

/* Response Display */
.response-container {
    margin-top: 10px;
}

.response-display {
    background: #1a1a1a;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 15px;
    min-height: 150px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    white-space: pre-wrap;
    word-break: break-all;
}

.response-display .placeholder {
    color: var(--text-secondary);
    font-style: italic;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}

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

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .tabs {
        flex-wrap: wrap;
    }
    
    .control-grid {
        grid-template-columns: 1fr;
    }
    
    .yaml-actions {
        flex-direction: column;
    }
}