/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Dark Theme Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --bg-card: #1e1e1e;
    
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    
    --accent-primary: #00d4aa;
    --accent-secondary: #0099cc;
    --accent-danger: #ff4757;
    --accent-warning: #ffa502;
    --accent-success: #2ed573;
    
    --border-color: #333333;
    --border-light: #444444;
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-content {
    text-align: center;
    color: var(--text-primary);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-content h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.loading-content p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* App Layout */
.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    min-height: 60px;
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.logo i {
    font-size: 1.8rem;
}

.pair-selector select {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.pair-selector select:hover {
    border-color: var(--accent-primary);
}

.pair-selector select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(0, 212, 170, 0.2);
}

.header-center {
    flex: 1;
    display: flex;
    justify-content: center;
}

.price-display {
    text-align: center;
}

.current-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.price-change {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
}

.change-value {
    font-weight: 600;
}

.change-percent {
    color: var(--text-secondary);
}

.price-change.positive .change-value,
.price-change.positive .change-percent {
    color: var(--accent-success);
}

.price-change.negative .change-value,
.price-change.negative .change-percent {
    color: var(--accent-danger);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.balance {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.balance-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.balance-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.user-button {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.user-button:hover {
    background: var(--bg-card);
    border-color: var(--accent-primary);
}

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebars */
.sidebar {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    width: 280px;
    display: flex;
    flex-direction: column;
    transition: var(--transition-normal);
    flex-shrink: 0;
}

.sidebar-right {
    border-right: none;
    border-left: 1px solid var(--border-color);
}

.sidebar.collapsed {
    width: 60px;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    min-height: 50px;
}

.sidebar-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.sidebar.collapsed .sidebar-header h3 {
    display: none;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar-content {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
}

.tool-group {
    margin-bottom: var(--spacing-lg);
}

.tool-group h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tool-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.tool-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8rem;
}

.tool-btn:hover {
    background: var(--bg-card);
    border-color: var(--accent-primary);
}

.tool-btn.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
}

.tool-btn i {
    font-size: 1.2rem;
}

.indicator-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.indicator-item label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.indicator-item label:hover {
    background: var(--bg-tertiary);
}

.indicator-item input[type="checkbox"] {
    accent-color: var(--accent-primary);
}

/* Chart Container */
.chart-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    overflow: hidden;
}

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    min-height: 50px;
    flex-shrink: 0;
}

.timeframe-selector {
    display: flex;
    gap: var(--spacing-xs);
}

.timeframe-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 0.8rem;
    font-weight: 500;
}

.timeframe-btn:hover {
    background: var(--bg-card);
    border-color: var(--accent-primary);
}

.timeframe-btn.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
}

.chart-controls {
    display: flex;
    gap: var(--spacing-xs);
}

.control-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:hover {
    background: var(--bg-card);
    border-color: var(--accent-primary);
}

.chart-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
    min-height: 400px; /* Ensure minimum height */
    height: calc(100vh - 200px); /* Use viewport height minus header/footer */
}

#trading-chart {
    width: 100% !important;
    height: 100% !important;
    display: block;
    min-height: 400px; /* Ensure minimum height */
    background: transparent;
}

.chart-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

.crosshair {
    position: absolute;
    background: var(--accent-primary);
    opacity: 0.7;
    pointer-events: none;
}

.crosshair.horizontal {
    width: 100%;
    height: 1px;
    top: 0;
    left: 0;
}

.crosshair.vertical {
    width: 1px;
    height: 100%;
    top: 0;
    left: 0;
}

.price-line {
    position: absolute;
    background: var(--accent-primary);
    width: 100%;
    height: 1px;
    opacity: 0.8;
    pointer-events: none;
}

/* Trading Controls */
.trading-controls {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    flex-shrink: 0;
}

.trading-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
}

.trade-form {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-group input {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    width: 120px;
    transition: var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(0, 212, 170, 0.2);
}

.trade-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.trade-btn {
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 120px;
    justify-content: center;
}

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

.buy-btn:hover {
    background: #26a96c;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.sell-btn:hover {
    background: #e63946;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.quick-trade {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
}

.quick-trade h4 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.quick-buttons {
    display: flex;
    gap: var(--spacing-xs);
}

.quick-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 0.8rem;
    font-weight: 500;
}

.quick-btn:hover {
    background: var(--bg-card);
    border-color: var(--accent-primary);
}

/* Status Bar */
.status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.connection-status.connected i {
    color: var(--accent-success);
}

.connection-status.disconnected i {
    color: var(--accent-danger);
}

.connection-status.connecting i {
    color: var(--accent-warning);
    animation: pulse 1s infinite;
}

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

/* Orders and History */
.orders-section,
.history-section {
    margin-bottom: var(--spacing-lg);
}

.orders-section h4,
.history-section h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.orders-list,
.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.order-item,
.history-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    font-size: 0.8rem;
}

.order-item.buy {
    border-left: 3px solid var(--accent-success);
}

.order-item.sell {
    border-left: 3px solid var(--accent-danger);
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
}

.user-settings {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.setting-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.setting-group input,
.setting-group select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.setting-group input:focus,
.setting-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(0, 212, 170, 0.2);
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.invisible {
    visibility: hidden;
}

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-sm {
    gap: var(--spacing-sm);
}

.gap-md {
    gap: var(--spacing-md);
}

.gap-lg {
    gap: var(--spacing-lg);
}

.p-sm {
    padding: var(--spacing-sm);
}

.p-md {
    padding: var(--spacing-md);
}

.p-lg {
    padding: var(--spacing-lg);
}

.m-sm {
    margin: var(--spacing-sm);
}

.m-md {
    margin: var(--spacing-md);
}

.m-lg {
    margin: var(--spacing-lg);
}