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

:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-color: #f8fafc;
    --panel-bg: #ffffff;
    --border-color: #e2e8f0;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --terminal-bg: #1e293b;
    --terminal-text: #e2e8f0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary-color), #1d4ed8);
    color: white;
    border-radius: 10px;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 5px;
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

/* Panels */
.panel {
    background: var(--panel-bg);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.panel h2 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.5em;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.panel h3 {
    color: var(--secondary-color);
    margin: 15px 0 10px 0;
    font-size: 1.2em;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

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

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

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

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

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

.btn-small {
    padding: 6px 12px;
    font-size: 0.9em;
}

/* Connection Panel */
.connection-controls {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.status-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9em;
    font-weight: 600;
}

.status-badge.connected {
    background: #d1fae5;
    color: #065f46;
}

.status-badge.disconnected {
    background: #fee2e2;
    color: #991b1b;
}

.device-info {
    background: var(--bg-color);
    padding: 15px;
    border-radius: 6px;
    margin-top: 15px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.info-row:last-child {
    border-bottom: none;
}

.info-row .label {
    font-weight: 600;
    color: var(--text-muted);
}

.occupancy-badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.9em;
}

.occupancy-badge.occupied {
    background: #fecaca;
    color: #991b1b;
}

.occupancy-badge.free {
    background: #d1fae5;
    color: #065f46;
}

/* PWM Controls */
.pwm-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.pwm-group {
    background: var(--bg-color);
    padding: 15px;
    border-radius: 8px;
}

.pwm-channel {
    margin-bottom: 15px;
}

.pwm-channel label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-weight: 500;
}

.channel-name {
    color: var(--text-color);
}

.channel-value {
    color: var(--primary-color);
    font-weight: 700;
    min-width: 50px;
    text-align: right;
}

.pwm-slider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
}

.pwm-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.pwm-slider::-webkit-slider-thumb:hover {
    background: #1d4ed8;
    transform: scale(1.2);
}

.pwm-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
}

/* Configuration Panel */
.config-section {
    margin-bottom: 25px;
}

.form-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.form-group label {
    font-weight: 600;
    min-width: 180px;
    color: var(--text-muted);
}

.form-group select,
.form-group input[type="number"] {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1em;
    flex: 1;
    min-width: 200px;
}

.form-group select:focus,
.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.info-text {
    color: var(--text-muted);
    font-size: 0.9em;
    margin-bottom: 15px;
}

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

.terminal-controls label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9em;
    color: var(--text-muted);
}

.terminal-controls input[type="checkbox"] {
    cursor: pointer;
}

.terminal-controls input[type="number"] {
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9em;
}

.terminal {
    background: var(--terminal-bg);
    color: var(--terminal-text);
    padding: 15px;
    border-radius: 6px;
    height: 300px;
    overflow-y: auto;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
    line-height: 1.5;
    margin-bottom: 10px;
}

.terminal-line {
    margin-bottom: 4px;
    white-space: pre-wrap;
    word-break: break-all;
}

.terminal-line.tx {
    color: #60a5fa;
}

.terminal-line.rx {
    color: #34d399;
}

.terminal-line.error {
    color: #f87171;
}

.terminal-line.info {
    color: #fbbf24;
}

.command-input {
    display: flex;
    gap: 10px;
}

.command-input input {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1em;
}

.command-input input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.9em;
}

/* Scrollbar Styling */
.terminal::-webkit-scrollbar {
    width: 8px;
}

.terminal::-webkit-scrollbar-track {
    background: #0f172a;
    border-radius: 4px;
}

.terminal::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: 4px;
}

.terminal::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8em;
    }

    .pwm-controls {
        grid-template-columns: 1fr;
    }

    .form-group {
        flex-direction: column;
        align-items: stretch;
    }

    .form-group label {
        min-width: auto;
    }

    .connection-controls {
        flex-direction: column;
        align-items: stretch;
    }
}