:root {
    --primary: #6366f1;
    --primary-dark: #4338ca;
    --secondary: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --background: #0f0f23;
    --surface: #1a1b2f;
    --surface-light: #252642;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --border: #2d3748;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

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

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

/* Navigation */
.navbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: between;
    align-items: center;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.nav-link:hover {
    background: var(--surface-light);
    color: var(--primary);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Login Page */
.login-body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--background) 0%, #1a1a2e 50%, #16213e 100%);
}

.login-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1000px;
    width: 100%;
    padding: 2rem;
}

.login-card {
    background: var(--surface);
    padding: 3rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.logo i {
    font-size: 3rem;
    color: var(--primary);
}

.logo h1 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: var(--text);
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--text);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    justify-content: center;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Dashboard */
.dashboard {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.stat-icon.profit {
    background: linear-gradient(135deg, var(--secondary), #059669);
}

.stat-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.stat-info p {
    color: var(--text-muted);
}

/* Control Section */
.control-section {
    margin-bottom: 2rem;
}

.control-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
}

.control-card h2 {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

.chart-card, .positions-card, .symbols-card, .activity-card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
}

.chart-card {
    grid-column: 1;
    grid-row: 1;
}

.positions-card {
    grid-column: 2;
    grid-row: 1;
}

.symbols-card {
    grid-column: 1;
    grid-row: 2;
}

.activity-card {
    grid-column: 2;
    grid-row: 2;
}

/* Chart */
.chart-container {
    height: 300px;
    position: relative;
}

/* Lists */
.positions-list, .activity-list {
    max-height: 400px;
    overflow-y: auto;
}

.position-item, .activity-item {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: between;
    align-items: center;
}

.position-item:last-child, .activity-item:last-child {
    border-bottom: none;
}

.position-info, .activity-info {
    flex: 1;
}

.position-symbol {
    font-weight: bold;
    color: var(--primary);
}

.position-pnl {
    font-weight: bold;
}

.pnl-positive {
    color: var(--secondary);
}

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

/* Symbols Grid */
.symbols-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
}

.symbol-card {
    background: var(--surface-light);
    padding: 1rem;
    border-radius: 0.5rem;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

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

.symbol-name {
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.symbol-price {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--border);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--text);
}

.feature-card p {
    color: var(--text-muted);
}

/* Messages */
.message {
    padding: 1rem;
    border-radius: 0.5rem;
    margin: 1rem 0;
}

.message.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--secondary);
    color: var(--secondary);
}

.message.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
}

.message.warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--warning);
    color: var(--warning);
}

.hidden {
    display: none;
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Security Notice */
.security-notice {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--primary);
    border-radius: 0.5rem;
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.security-notice i {
    color: var(--primary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface);
        flex-direction: column;
        padding: 1rem;
        border-top: 1px solid var(--border);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .login-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .content-grid {
        grid-template-columns: 1fr;
    }

    .chart-card, .positions-card, .symbols-card, .activity-card {
        grid-column: 1;
    }

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

    .control-actions {
        flex-direction: column;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

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

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

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

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


/* Settings Form Styles */
.settings-form {
    margin-top: 1rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text);
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--text);
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* History Styles */
.history-controls {
    margin-bottom: 1rem;
}

.history-item {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-item:last-child {
    border-bottom: none;
}

.trade-info {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.trade-side.buy {
    color: var(--secondary);
    font-weight: bold;
}

.trade-side.sell {
    color: var(--danger);
    font-weight: bold;
}

.trade-time {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.help-section {
    margin: 1rem 0;
}

.help-card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--warning);
    border-left: 4px solid var(--warning);
}

.help-card h3 {
    color: var(--warning);
    margin-bottom: 1rem;
}

.help-card ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.help-card li {
    margin-bottom: 0.5rem;
}

.help-card a {
    color: var(--primary);
    text-decoration: underline;
}