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

:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg: #0f172a;
    --bg-card: #1e293b;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

.navbar {
    background: var(--bg-card);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
}

.navbar h1 {
    font-size: 1.5rem;
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.github-link {
    color: var(--text-muted);
    transition: color 0.2s;
    display: flex;
    align-items: center;
}

.github-link:hover {
    color: var(--text);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
}

.stat-card h3 {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.stat-card p {
    font-size: 2rem;
    font-weight: 700;
}

.chart-container {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

.chart-container h2 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.recent-trades {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
}

.recent-trades h2 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.875rem;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    border: none;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

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

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

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.algorithms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.algorithm-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
}

.algorithm-card h3 {
    margin-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.algorithm-card .strategy-type {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.algorithm-card .symbols {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.symbol-tag {
    background: var(--border);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
}

.algorithm-card .actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.toggle-switch {
    position: relative;
    width: 48px;
    height: 24px;
}

.toggle-switch input {
    display: none;
}

.toggle-switch label {
    display: block;
    width: 100%;
    height: 100%;
    background: var(--border);
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.2s;
}

.toggle-switch input:checked + label {
    background: var(--success);
}

.toggle-switch label::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: transform 0.2s;
}

.toggle-switch input:checked + label::after {
    transform: translateX(24px);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 0.5rem;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content h2 {
    margin-bottom: 1.5rem;
}

.close {
    float: right;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
}

.close:hover {
    color: var(--text);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    color: var(--text);
    font-size: 1rem;
}

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

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.comparison-chart-container {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

#comparison-table {
    background: var(--bg-card);
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    overflow: hidden;
}

.positive {
    color: var(--success);
}

.negative {
    color: var(--danger);
}

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

.status-submitted {
    color: var(--warning);
}

.status-canceled,
.status-rejected {
    color: var(--danger);
}