:root {
    --primary: #2563eb;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --dark: #1e293b;
    --light: #f1f5f9;
    --border: #e2e8f0;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 400px;
}

.login-card h1 {
    text-align: center;
    margin-bottom: 10px;
    color: var(--primary);
    font-size: 2em;
}

.login-card h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--secondary);
    font-size: 1.2em;
    font-weight: 500;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.input-group input[type="text"],
.input-group input[type="password"],
.input-group input[type="number"],
.input-group select,
.action-select {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.input-group small {
    display: block;
    margin-top: 5px;
    color: #777;
    font-size: 12px;
}

.input-group input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
}

.btn {
    width: 100%;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

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

.btn-secondary:hover {
    background: #475569;
}

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

.btn-accent:hover {
    background: #059669;
}

.error-message {
    color: var(--danger);
    margin-top: 10px;
    text-align: center;
    font-size: 14px;
}

/* Dashboard */

.dashboard-container {
    min-height: 100vh;
    background: white;
}

.dashboard-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px 30px;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.dashboard-header h1 {
    font-size: 1.8em;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.status-indicator {
    font-size: 20px;
}

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

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

.dashboard-content {
    padding: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.card h2 {
    margin-bottom: 20px;
    color: var(--dark);
    font-size: 1.5em;
}

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

.stat-item {
    background: var(--light);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
}

.stat-label {
    font-size: 14px;
    color: var(--secondary);
    margin-bottom: 8px;
}

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

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

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

.action-card {
    background: var(--light);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
}

.action-card h3 {
    margin-bottom: 10px;
    color: var(--dark);
}

.action-card p {
    margin-bottom: 15px;
    color: var(--secondary);
    font-size: 14px;
}

.action-card .btn {
    width: 100%;
    margin-top: 10px;
}

.action-select {
    margin-bottom: 10px;
}

.status-text {
    margin-top: 10px;
    font-size: 14px;
    min-height: 20px;
}

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

.status-text.error {
    color: var(--danger);
}

.status-text.info {
    color: var(--primary);
}

.signal-history {
    max-height: 600px;
    overflow-y: auto;
}

.signal-item {
    background: var(--light);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 15px;
    border-left: 4px solid var(--primary);
}

.signal-item.buy {
    border-left-color: var(--success);
}

.signal-item.sell {
    border-left-color: var(--danger);
}

.signal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.signal-symbol {
    font-size: 18px;
    font-weight: bold;
}

.signal-direction {
    padding: 4px 12px;
    border-radius: 4px;
    font-weight: bold;
    font-size: 12px;
}

.signal-direction.buy {
    background: var(--success);
    color: white;
}

.signal-direction.sell {
    background: var(--danger);
    color: white;
}

.signal-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    font-size: 14px;
}

.signal-detail {
    display: flex;
    justify-content: space-between;
}

.signal-detail-label {
    color: var(--secondary);
}

.signal-detail-value {
    font-weight: 600;
}

.signal-time {
    margin-top: 10px;
    font-size: 12px;
    color: var(--secondary);
    text-align: right;
}

.loading {
    text-align: center;
    color: var(--secondary);
    padding: 40px;
}

@media (max-width: 768px) {
    .dashboard-header {
        flex-direction: column;
        gap: 15px;
    }

    .stats-grid,
    .form-grid,
    .actions-grid {
        grid-template-columns: 1fr;
    }

    .dashboard-content {
        padding: 15px;
    }
}