/* Option Chain Trading Interface - Responsive CSS Framework */

/* New Options Table Styles */
.options-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
    background: white;
}

.options-table th {
    background-color: var(--gray-100);
    padding: 0.75rem 0.5rem;
    text-align: center;
    font-weight: 600;
    font-size: var(--font-size-xs);
    border-bottom: 2px solid var(--gray-300);
    position: sticky;
    top: 0;
    z-index: 10;
}

.options-table td {
    padding: 0.75rem 0.5rem;
    text-align: center;
    border-bottom: 1px solid var(--gray-200);
    font-size: var(--font-size-sm);
}

.strike-header {
    background-color: var(--primary-color) !important;
    color: white !important;
    font-weight: 700;
    min-width: 80px;
}

.strike-price {
    font-weight: 700;
    font-size: var(--font-size-base);
    color: var(--dark-color);
    cursor: pointer;
    padding: 1rem 0.5rem !important;
    background-color: var(--gray-50);
}

.option-row {
    transition: background-color 0.2s ease;
    cursor: pointer;
}

.option-row:hover {
    background-color: var(--gray-100);
}

.option-row:hover .strike-price {
    background-color: var(--primary-color);
    color: white;
}

.call-oi, .put-oi {
    font-weight: 600;
    color: var(--gray-700);
}

.call-ltp, .put-ltp {
    font-weight: 600;
}

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

.text-danger {
    color: var(--danger-color) !important;
}

/* Bottom Navigation */
.bottom-nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 0.5rem 0;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--gray-600);
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
    flex: 1;
    max-width: 80px;
}

.nav-item:hover {
    color: var(--primary-color);
    background-color: var(--gray-100);
}

.nav-item.active {
    color: var(--primary-color);
    background-color: rgba(0, 122, 255, 0.1);
}

.nav-icon {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.nav-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Control Panel Styles */
.control-panel {
    background: linear-gradient(135deg, var(--light-color), white);
}

.underlying-section {
    margin-bottom: 1rem;
}

.selected-stock {
    background: white;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    padding: 1rem;
}

.price-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.price {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.change {
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.underlying-selector {
    text-align: center;
    padding: 2rem 1rem;
    background: var(--gray-100);
    border-radius: var(--border-radius);
}

.basket-icon {
    font-size: 1.5rem;
    position: relative;
    user-select: none;
}

.basket-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--danger-color);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* Table Responsive */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

@media (max-width: 768px) {
    .options-table th,
    .options-table td {
        padding: 0.5rem 0.25rem;
        font-size: var(--font-size-xs);
    }
    
    .strike-price {
        padding: 0.75rem 0.25rem !important;
        font-size: var(--font-size-sm);
    }
    
    .price {
        font-size: var(--font-size-base);
    }
}

/* Modal Enhancements */
.modal-mobile .underlying-item {
    transition: background-color 0.2s ease;
}

.modal-mobile .underlying-item:hover {
    background-color: var(--gray-100);
}

.underlying-item .border {
    cursor: pointer;
    transition: all 0.2s ease;
}

.underlying-item .border:hover {
    border-color: var(--primary-color) !important;
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.2);
}

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

:root {
    /* Color Palette */
    --primary-color: #007AFF;
    --primary-dark: #0056b3;
    --success-color: #28a745;
    --success-dark: #1e7e34;
    --danger-color: #dc3545;
    --danger-dark: #c82333;
    --warning-color: #ffc107;
    --warning-dark: #e0a800;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Borders */
    --border-radius: 0.375rem;
    --border-radius-lg: 0.5rem;
    --border-radius-xl: 0.75rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--gray-900);
    background-color: var(--light-color);
}

/* Container System */
.container {
    width: 100%;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 576px) {
    .container { max-width: 540px; }
}

@media (min-width: 768px) {
    .container { max-width: 720px; }
}

@media (min-width: 992px) {
    .container { max-width: 960px; }
}

@media (min-width: 1200px) {
    .container { max-width: 1140px; }
}

/* Header Styles */
.header {
    background-color: white;
    border-bottom: 1px solid var(--gray-200);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.search-bar {
    flex: 1;
    max-width: 400px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

/* Navigation */
.nav-tabs {
    display: flex;
    border-bottom: 1px solid var(--gray-200);
    background-color: white;
}

.nav-tab {
    flex: 1;
    padding: var(--spacing-md);
    text-align: center;
    background: none;
    border: none;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 44px; /* Touch target minimum */
}

.nav-tab.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

.nav-tab:hover {
    color: var(--primary-dark);
    background-color: var(--gray-100);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 44px; /* Touch target minimum */
    min-width: 44px;
}

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

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

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

.btn-success:hover {
    background-color: var(--success-dark);
    border-color: var(--success-dark);
}

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

.btn-danger:hover {
    background-color: var(--danger-dark);
    border-color: var(--danger-dark);
}

.btn-outline-primary {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
    min-height: 32px;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-lg);
    min-height: 48px;
}

/* Card Styles */
.card {
    background-color: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow var(--transition-fast);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
    background-color: var(--gray-100);
    font-weight: 600;
}

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

.card-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--gray-200);
    background-color: var(--gray-100);
}

/* Option Card Styles */
.option-card {
    background-color: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.option-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.option-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
}

.option-type {
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
}

.option-type.call {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
}

.option-type.put {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
}

.strike-price {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.option-card-body {
    padding: var(--spacing-md);
}

.option-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.metric {
    text-align: center;
}

.metric-label {
    font-size: var(--font-size-xs);
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.metric-value {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.premium {
    color: var(--primary-color);
}

.volume {
    color: var(--gray-700);
}

.risk-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-left: var(--spacing-xs);
}

.risk-low { background-color: var(--success-color); }
.risk-medium { background-color: var(--warning-color); }
.risk-high { background-color: var(--danger-color); }

/* Table Styles */
.table-container {
    background-color: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.table th {
    background-color: var(--gray-100);
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 10;
}

.table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
    transition: background-color var(--transition-fast);
}

.table tr:hover td {
    background-color: var(--gray-100);
}

.table-sortable th {
    cursor: pointer;
    user-select: none;
}

.table-sortable th:hover {
    background-color: var(--gray-200);
}

.sort-indicator {
    margin-left: var(--spacing-xs);
    opacity: 0.5;
}

.sort-indicator.active {
    opacity: 1;
}

/* Price highlighting */
.price-up {
    background-color: rgba(40, 167, 69, 0.1) !important;
    color: var(--success-color);
    animation: priceFlash 0.5s ease-out;
}

.price-down {
    background-color: rgba(220, 53, 69, 0.1) !important;
    color: var(--danger-color);
    animation: priceFlash 0.5s ease-out;
}

@keyframes priceFlash {
    0% { background-color: rgba(255, 255, 255, 0.8); }
    50% { opacity: 0.8; }
    100% { opacity: 1; }
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal-overlay.show {
    display: flex;
}

.modal {
    background-color: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    opacity: 0;
    transition: all var(--transition-normal);
}

.modal-overlay.show .modal {
    transform: scale(1);
    opacity: 1;
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: between;
    align-items: center;
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--gray-500);
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--gray-100);
    color: var(--gray-700);
}

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

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--gray-200);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* Form Styles */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    font-size: var(--font-size-sm);
    color: var(--gray-700);
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
    appearance: none;
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.quantity-btn {
    width: 32px;
    height: 32px;
    border: 1px solid var(--gray-300);
    background-color: white;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.quantity-btn:hover {
    background-color: var(--gray-100);
    border-color: var(--gray-400);
}

.quantity-input {
    width: 80px;
    text-align: center;
}

/* Toggle Switch */
.toggle-switch {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.switch {
    position: relative;
    width: 48px;
    height: 24px;
    background-color: var(--gray-300);
    border-radius: 12px;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.switch.active {
    background-color: var(--primary-color);
}

.switch-handle {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background-color: white;
    border-radius: 50%;
    transition: transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.switch.active .switch-handle {
    transform: translateX(24px);
}

/* Filter Panel */
.filter-panel {
    background-color: white;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.filter-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

@media (min-width: 768px) {
    .filter-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 992px) {
    .filter-row {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Range Slider */
.range-slider {
    width: 100%;
    margin: var(--spacing-sm) 0;
}

.range-slider input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--gray-200);
    outline: none;
    appearance: none;
}

.range-slider input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

.range-slider input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
}

.range-values {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    margin-top: var(--spacing-xs);
}

/* Utility Classes */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

.justify-center { justify-content: center !important; }
.justify-between { justify-content: space-between !important; }
.justify-end { justify-content: flex-end !important; }

.align-center { align-items: center !important; }
.align-start { align-items: flex-start !important; }
.align-end { align-items: flex-end !important; }

.text-center { text-align: center !important; }
.text-left { text-align: left !important; }
.text-right { text-align: right !important; }

.text-primary { color: var(--primary-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-muted { color: var(--gray-600) !important; }

.fw-normal { font-weight: 400 !important; }
.fw-medium { font-weight: 500 !important; }
.fw-semibold { font-weight: 600 !important; }
.fw-bold { font-weight: 700 !important; }

.m-0 { margin: 0 !important; }
.mt-1 { margin-top: var(--spacing-xs) !important; }
.mt-2 { margin-top: var(--spacing-sm) !important; }
.mt-3 { margin-top: var(--spacing-md) !important; }
.mb-1 { margin-bottom: var(--spacing-xs) !important; }
.mb-2 { margin-bottom: var(--spacing-sm) !important; }
.mb-3 { margin-bottom: var(--spacing-md) !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: var(--spacing-xs) !important; }
.p-2 { padding: var(--spacing-sm) !important; }
.p-3 { padding: var(--spacing-md) !important; }

/* Mobile-specific styles */
@media (max-width: 767px) {
    .container {
        padding-left: var(--spacing-sm);
        padding-right: var(--spacing-sm);
    }
    
    .header-content {
        gap: var(--spacing-sm);
    }
    
    .logo {
        font-size: var(--font-size-lg);
    }
    
    .modal {
        margin: var(--spacing-sm);
        max-height: calc(100vh - 2rem);
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--spacing-md);
    }
    
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .table {
        min-width: 600px;
    }
    
    /* Mobile slide-up modal */
    .modal-mobile {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        max-width: none;
        border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
        transform: translateY(100%);
        transition: transform var(--transition-normal);
        max-height: 80vh;
    }
    
    .modal-overlay.show .modal-mobile {
        transform: translateY(0);
    }
    
    /* Touch-friendly swipe actions */
    .option-card {
        touch-action: pan-y;
    }
    
    .option-card.swipe-active {
        transform: translateX(-80px);
        transition: transform var(--transition-fast);
    }
    
    .swipe-actions {
        position: absolute;
        right: 0;
        top: 0;
        bottom: 0;
        width: 80px;
        display: flex;
        background-color: var(--primary-color);
        opacity: 0;
        transition: opacity var(--transition-fast);
    }
    
    .option-card.swipe-active .swipe-actions {
        opacity: 1;
    }
    
    .swipe-action {
        flex: 1;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-size: var(--font-size-sm);
        font-weight: 600;
        text-decoration: none;
        transition: background-color var(--transition-fast);
    }
    
    .swipe-action:hover {
        background-color: var(--primary-dark);
    }
    
    .recent-chains {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
        margin: var(--spacing-lg) 0;
    }
    
    .recent-chain {
        aspect-ratio: 1;
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: white;
        border: 1px solid var(--gray-200);
        border-radius: var(--border-radius-lg);
        text-decoration: none;
        color: var(--gray-900);
        font-weight: 600;
        transition: all var(--transition-fast);
    }
    
    .recent-chain:hover {
        border-color: var(--primary-color);
        box-shadow: var(--shadow-md);
    }
    
    .popular-stock {
        padding: var(--spacing-md);
        background-color: white;
        border: 1px solid var(--gray-200);
        border-radius: var(--border-radius-lg);
        text-decoration: none;
        color: var(--gray-900);
        transition: all var(--transition-fast);
        display: block;
    }
    
    .popular-stock:hover {
        border-color: var(--primary-color);
        box-shadow: var(--shadow-md);
        color: var(--gray-900);
    }
}

/* Desktop-specific styles */
@media (min-width: 768px) {
    .option-chain-table {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        gap: var(--spacing-lg);
        align-items: start;
    }
    
    .calls-section,
    .puts-section {
        background-color: white;
        border-radius: var(--border-radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
    }
    
    .strikes-section {
        background-color: var(--gray-100);
        padding: var(--spacing-md);
        border-radius: var(--border-radius-lg);
        min-width: 120px;
    }
    
    .strike-row {
        padding: var(--spacing-sm);
        text-align: center;
        font-weight: 600;
        margin-bottom: var(--spacing-xs);
    }
    
    .strike-row.at-the-money {
        background-color: var(--primary-color);
        color: white;
        border-radius: var(--border-radius);
    }
    
    /* Context menu */
    .context-menu {
        position: fixed;
        background-color: white;
        border: 1px solid var(--gray-200);
        border-radius: var(--border-radius);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-xs) 0;
        min-width: 150px;
        z-index: 3000;
        display: none;
    }
    
    .context-menu.show {
        display: block;
    }
    
    .context-menu-item {
        display: block;
        padding: var(--spacing-sm) var(--spacing-md);
        color: var(--gray-700);
        text-decoration: none;
        font-size: var(--font-size-sm);
        transition: background-color var(--transition-fast);
    }
    
    .context-menu-item:hover {
        background-color: var(--gray-100);
        color: var(--gray-900);
    }
    
    /* Bulk selection */
    .bulk-panel {
        position: fixed;
        bottom: var(--spacing-lg);
        right: var(--spacing-lg);
        background-color: white;
        border-radius: var(--border-radius-lg);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-lg);
        min-width: 300px;
        transform: translateY(100px);
        opacity: 0;
        transition: all var(--transition-normal);
        z-index: 1500;
    }
    
    .bulk-panel.show {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Loading and skeleton states */
.loading-skeleton {
    background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.spinner {
    border: 2px solid var(--gray-200);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

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

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles for keyboard navigation */
.btn:focus,
.form-control:focus,
.nav-tab:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --gray-100: #f0f0f0;
        --gray-200: #e0e0e0;
        --gray-300: #c0c0c0;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    ::before,
    ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}