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

:root {
    --primary: #00ff88;
    --primary-dark: #00cc6a;
    --secondary: #8b5cf6;
    --background: #0a0a0f;
    --surface: #1a1a2e;
    --surface-light: #2d2d44;
    --text: #ffffff;
    --text-secondary: #a0a0b0;
    --danger: #ff4757;
    --warning: #ffa502;
    --success: #2ed573;
    --info: #2f3542;
}

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

.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: 1px solid var(--surface-light);
    margin-bottom: 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary);
}

.custom-icon {
    width: 20px;
    height: 20px;
}

.logo i {
    font-size: 28px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--surface);
    border-radius: 20px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--danger);
    animation: pulse 2s infinite;
}

.status-dot.connected {
    background: var(--success);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Dashboard */
.dashboard {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 30px;
    min-height: 70vh;
}

/* Sidebar */
.sidebar {
    background: var(--surface);
    border-radius: 15px;
    padding: 20px;
    height: fit-content;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    margin-bottom: 5px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-secondary);
}

.nav-item:hover {
    background: var(--surface-light);
    color: var(--text);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--background);
    font-weight: bold;
}

/* Content */
.content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.tab-content {
    display: none;
}

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

/* Cards */
.card {
    background: var(--surface);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 20px;
    border: 1px solid var(--surface-light);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 255, 136, 0.1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card h2 {
    color: var(--primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 14px;
}

.input-group input, .input-group select {
    padding: 12px 15px;
    background: var(--background);
    border: 1px solid var(--surface-light);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
    transition: all 0.3s ease;
}

.input-group input:focus, .input-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 255, 136, 0.1);
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
}

/* Symbol Selection Styles */
.symbol-input-section {
    margin-bottom: 30px;
    padding: 20px;
    background: var(--background);
    border-radius: 10px;
}

.symbol-input-container {
    display: flex;
    gap: 10px;
    align-items: center;
}

.symbol-input-container input {
    flex: 1;
}

.btn-symbol {
    padding: 12px 20px;
    background: var(--secondary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-symbol:hover {
    background: #7c3aed;
    transform: translateY(-1px);
}

.symbol-validation {
    margin-top: 8px;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 14px;
    display: none;
}

.symbol-validation.valid {
    background: rgba(46, 213, 115, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
    display: block;
}

.symbol-validation.invalid {
    background: rgba(255, 71, 87, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
    display: block;
}

.symbol-categories {
    margin-bottom: 30px;
}

.category-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.category-btn {
    padding: 10px 20px;
    background: var(--surface-light);
    color: var(--text);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.category-btn:hover {
    background: var(--secondary);
    transform: translateY(-1px);
}

.symbols-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 10px;
    margin-top: 15px;
}

.symbol-item {
    padding: 12px 15px;
    background: var(--background);
    border: 1px solid var(--surface-light);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.symbol-item:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.symbol-item.selected {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--background);
    border-color: var(--primary);
}

.symbol-item .remove-symbol {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 12px;
    cursor: pointer;
    display: none;
}

.symbol-item:hover .remove-symbol {
    display: block;
}

.selected-symbols {
    margin-bottom: 30px;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-danger {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--background);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 255, 136, 0.3);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--surface-light);
    color: var(--text);
}

.btn-secondary:hover {
    background: var(--surface);
}

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

.btn-danger:hover:not(:disabled) {
    background: #ff3742;
    transform: translateY(-2px);
}

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

.stat-card {
    background: var(--surface);
    padding: 25px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    border: 1px solid var(--surface-light);
}

.stat-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.stat-value {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary);
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Activity Log */
.activity-log {
    max-height: 300px;
    overflow-y: auto;
}

.activity-item {
    padding: 12px 0;
    border-bottom: 1px solid var(--surface-light);
    display: flex;
    gap: 15px;
}

.activity-time {
    color: var(--primary);
    font-size: 12px;
    min-width: 70px;
}

.activity-message {
    color: var(--text);
    font-size: 14px;
}

/* Control Panel */
.control-panel {
    display: flex;
    gap: 15px;
    padding: 20px;
    background: var(--surface);
    border-radius: 15px;
    margin-top: 20px;
}

/* Slave Account */
.slave-account {
    background: var(--background);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 15px;
    border: 1px solid var(--surface-light);
}

.slave-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--surface-light);
    transition: .4s;
    border-radius: 24px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: var(--primary);
}

input:checked + .toggle-slider:before {
    transform: translateX(26px);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--surface);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Responsive */
@media (max-width: 768px) {
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        order: 2;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .control-panel {
        flex-direction: column;
    }
    
    .symbol-input-container {
        flex-direction: column;
    }
    
    .symbols-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
}