/* ============================================
   NavOption - Unified Stylesheet
   ============================================ */

/* --- CSS Variables (Design Tokens) --- */
:root {
    /* Default Dark Mode */
    --bg-body: #0a0e14;
    --bg-card: rgba(22, 27, 34, 0.7);
    --bg-input: #0d1117;
    
    --primary: #00f3ff;
    --primary-dim: rgba(0, 243, 255, 0.1);
    --secondary: #7d8590;
    --accent: #ffd700;
    
    --success: #00d26a;
    --danger: #f85149;
    --warning: #e3b341;
    
    --text-main: #e6edf3;
    --text-muted: #8b949e;
    --border: #30363d;
    
    --glass-border: 1px solid rgba(240, 246, 252, 0.1);
    --glass-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);

    --font-ui: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Animation timing */
    --transition-fast: 150ms ease-out;
    --transition-normal: 200ms ease-out;
    --transition-slow: 300ms ease-out;
}

/* Light Mode Overrides */
[data-theme="light"] {
    --bg-body: #f6f8fa;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-input: #ffffff;
    
    --primary: #0969da;
    --primary-dim: rgba(9, 105, 218, 0.1);
    --secondary: #57606a;
    --accent: #d97706;
    
    --success: #1a7f37;
    --danger: #cf222e;
    --warning: #9a6700;
    
    --text-main: #1f2328;
    --text-muted: #656d76;
    --border: #d0d7de;
    
    --glass-border: 1px solid rgba(27, 31, 35, 0.15);
    --glass-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

/* --- Base Styles --- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-body);
    color: var(--text-main);
    font-family: var(--font-ui);
    min-height: 100vh;
    margin: 0;
    padding: 0;
    background-image: 
        linear-gradient(rgba(128, 128, 128, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(128, 128, 128, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* Page load animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.app-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 16px;
    animation: fadeIn 0.4s ease-out;
}

@media (min-width: 768px) {
    .app-container {
        padding: 20px;
    }
}

/* Narrow container for text-heavy pages */
.app-container--narrow {
    max-width: 1000px;
}

/* --- Navbar --- */
.navbar {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: var(--glass-border);
    padding: 12px 16px;
    margin-bottom: 24px;
    border-radius: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: box-shadow var(--transition-normal);
}

@media (min-width: 768px) {
    .navbar {
        padding: 15px 20px;
        margin-bottom: 30px;
    }
}

.navbar--scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.brand-logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color var(--transition-fast);
}

@media (min-width: 768px) {
    .brand-logo {
        font-size: 1.5rem;
        gap: 10px;
    }
}

.brand-logo:hover {
    color: var(--primary);
}

.brand-logo i,
.brand-logo svg {
    color: var(--primary);
    width: 24px;
    height: 24px;
}

.brand-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-left: 12px;
    font-weight: 400;
    border-left: 1px solid var(--border);
    padding-left: 12px;
    display: none;
}

@media (min-width: 768px) {
    .brand-subtitle {
        display: inline-block;
    }
}

/* Theme Toggle */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 8px 14px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
}

.theme-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-dim);
}

.theme-toggle:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* --- Glass Cards --- */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: var(--glass-border);
    border-radius: 12px;
    box-shadow: var(--glass-shadow);
    padding: 20px;
    margin-bottom: 20px;
    transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

@media (min-width: 768px) {
    .glass-card {
        padding: 24px;
        margin-bottom: 24px;
    }
}

.glass-card:hover {
    box-shadow: var(--glass-shadow), 0 0 0 1px var(--primary-dim);
}

/* Light mode: ensure card visibility */
[data-theme="light"] .glass-card {
    border: 1px solid var(--border);
}

/* --- Section Titles --- */
.section-title {
    color: var(--primary);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

@media (min-width: 768px) {
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 20px;
        padding-bottom: 15px;
    }
}

.section-subtitle {
    color: var(--text-main);
    font-size: 1.1rem;
    font-weight: 600;
    margin: 20px 0 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

@media (min-width: 768px) {
    .section-subtitle {
        font-size: 1.2rem;
        margin: 25px 0 15px;
    }
}

.section-subtitle::before {
    content: '';
    display: block;
    width: 4px;
    height: 1.2rem;
    background: var(--primary);
    border-radius: 2px;
    flex-shrink: 0;
}

/* --- Text Content --- */
.text-content {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-muted);
}

.text-content p {
    margin-bottom: 1rem;
}

.text-content ul {
    padding-left: 20px;
    margin-bottom: 1rem;
}

.text-content li {
    margin-bottom: 8px;
}

.text-content a {
    color: var(--primary);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.text-content a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* --- Forms & Controls --- */
.control-panel {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    flex-wrap: wrap;
}

@media (min-width: 768px) {
    .control-panel {
        gap: 15px;
    }
}

.filter-group {
    flex: 1;
    min-width: 100%;
}

@media (min-width: 480px) {
    .filter-group {
        min-width: 140px;
    }
}

.filter-group--auto {
    flex: 0 0 auto;
    min-width: auto;
}

.filter-label {
    display: block;
    color: var(--text-muted);
    font-size: 0.7rem;
    font-weight: 600;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

@media (min-width: 768px) {
    .filter-label {
        font-size: 0.75rem;
    }
}

.form-control {
    background-color: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-main);
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    padding: 10px 12px;
    width: 100%;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    background-color: var(--bg-input);
    color: var(--text-main);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-dim);
    outline: none;
}

/* Switch toggle */
.form-check-input {
    cursor: pointer;
    min-width: 44px;
    min-height: 24px;
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

/* Action Button */
.btn-action {
    background-color: var(--primary);
    color: #000;
    font-weight: 600;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
}

[data-theme="light"] .btn-action {
    color: #fff;
}

.btn-action:hover {
    filter: brightness(1.1);
    box-shadow: 0 4px 15px var(--primary-dim);
}

.btn-action:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.btn-action:active {
    transform: scale(0.98);
}

/* --- Data Table Styles --- */
.table-container {
    position: relative;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* Scroll indicator gradient */
.table-container::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 30px;
    background: linear-gradient(to right, transparent, var(--bg-card));
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.table-container.is-scrollable::after {
    opacity: 1;
}

table.dataTable {
    color: var(--text-main) !important;
    border-collapse: separate !important;
    border-spacing: 0 4px !important;
    width: 100% !important;
}

table.dataTable thead th {
    border-bottom: 2px solid var(--border) !important;
    color: var(--text-muted) !important;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 10px 8px !important;
    white-space: nowrap;
    position: sticky;
    top: 0;
    background: var(--bg-card);
}

@media (min-width: 768px) {
    table.dataTable thead th {
        font-size: 0.75rem;
        padding: 12px 10px !important;
    }
}

/* Sortable column indicators */
table.dataTable thead th.sorting::after,
table.dataTable thead th.sorting_asc::after,
table.dataTable thead th.sorting_desc::after {
    opacity: 0.5;
}

table.dataTable thead th.sorting_asc::after,
table.dataTable thead th.sorting_desc::after {
    color: var(--primary) !important;
    opacity: 1;
}

table.dataTable tbody tr {
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

table.dataTable tbody tr:hover {
    background-color: var(--primary-dim) !important;
}

table.dataTable tbody tr:nth-child(even) td {
    background-color: rgba(128, 128, 128, 0.03) !important;
}

table.dataTable tbody td {
    background-color: var(--bg-input) !important;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 10px 8px !important;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    vertical-align: middle;
    color: var(--text-main);
    transition: background-color var(--transition-fast);
}

@media (min-width: 768px) {
    table.dataTable tbody td {
        padding: 12px 10px !important;
        font-size: 0.9rem;
    }
}

/* First/last cell rounding */
table.dataTable tbody td:first-child {
    border-left: 1px solid var(--border);
    border-radius: 8px 0 0 8px;
}

table.dataTable tbody td:last-child {
    border-right: 1px solid var(--border);
    border-radius: 0 8px 8px 0;
}

/* --- Value Colors --- */
.text-up { color: var(--success) !important; }
.text-down { color: var(--danger) !important; }
.text-muted-soft { opacity: 0.7; }

/* --- Table Cell Styles --- */
.text-end { text-align: right !important; }
.font-mono { font-family: var(--font-mono) !important; }

.symbol-cell {
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.5px;
}

.symbol-clickable {
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.symbol-clickable:hover {
    opacity: 0.7;
    text-decoration: underline;
}

/* --- Stock Detail Modal --- */
.stock-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.stock-modal--visible {
    opacity: 1;
    visibility: visible;
}

.stock-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.stock-modal__content {
    position: relative;
    background: var(--bg-card);
    border: var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    max-width: 480px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    padding: 24px;
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.stock-modal--visible .stock-modal__content {
    transform: translateY(0);
}

.stock-modal__close {
    position: absolute;
    top: 12px;
    right: 12px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 28px;
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.stock-modal__close:hover {
    background: var(--primary-dim);
    color: var(--primary);
}

.stock-modal__error {
    text-align: center;
    color: var(--danger);
    padding: 40px 20px;
}

/* Stock Detail Styles */
.stock-detail__header {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.stock-detail__symbol {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    font-family: var(--font-mono);
}

.stock-detail__name {
    font-size: 0.95rem;
    color: var(--text-main);
    margin-top: 4px;
}

.stock-detail__exchange {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.stock-detail__price {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 20px;
}

.stock-detail__last {
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-main);
}

.stock-detail__change {
    font-size: 1rem;
    font-family: var(--font-mono);
    font-weight: 500;
}

.stock-detail__section {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin: 20px 0 12px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.stock-detail__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.stock-detail__item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg-input);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.stock-detail__label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.stock-detail__value {
    font-size: 0.9rem;
    font-family: var(--font-mono);
    font-weight: 500;
    color: var(--text-main);
}

.dte-badge {
    display: inline-block;
    background: var(--primary-dim) !important;
    color: var(--primary) !important;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-left: 6px;
}

[data-theme="light"] .dte-badge {
    background: rgba(9, 105, 218, 0.15) !important;
}

.apy-cell {
    font-weight: 600;
    font-family: var(--font-mono);
}

.chg-cell {
    font-weight: 500;
}

/* --- DataTables Pagination --- */
.dataTables_wrapper .page-item .page-link {
    background-color: var(--bg-input) !important;
    color: var(--text-main) !important;
    border: 1px solid var(--border) !important;
    border-radius: 6px;
    margin: 0 2px;
    padding: 8px 14px;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.dataTables_wrapper .page-item.disabled .page-link {
    background-color: var(--bg-input) !important;
    color: var(--text-muted) !important;
    opacity: 0.5;
}

.dataTables_wrapper .page-item:not(.active):not(.disabled) .page-link:hover {
    background-color: var(--primary-dim) !important;
    color: var(--primary) !important;
    border-color: var(--primary) !important;
}

.dataTables_wrapper .page-item.active .page-link {
    background-color: var(--primary) !important;
    color: #000 !important;
    border-color: var(--primary) !important;
    box-shadow: 0 0 15px var(--primary-dim);
    font-weight: 600;
}

[data-theme="light"] .dataTables_wrapper .page-item.active .page-link {
    color: #fff !important;
}

.dataTables_wrapper .dataTables_length,
.dataTables_wrapper .dataTables_filter,
.dataTables_wrapper .dataTables_info {
    color: var(--text-muted) !important;
    margin-top: 1rem;
    font-size: 0.85rem;
}

.dataTables_wrapper .dataTables_length select,
.dataTables_wrapper .dataTables_filter input {
    background-color: var(--bg-input) !important;
    border: 1px solid var(--border) !important;
    color: var(--text-main) !important;
    border-radius: 6px;
    padding: 6px 10px;
    min-height: 36px;
}

.dataTables_wrapper .dataTables_length select {
    padding-right: 28px;
    min-width: 70px;
}

.dataTables_wrapper .dataTables_filter input:focus {
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 2px var(--primary-dim);
    outline: none;
}

/* --- Loading Overlay --- */
.loading-overlay {
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
}

.tech-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s infinite linear;
    box-shadow: 0 0 20px var(--primary-dim);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 20px var(--primary-dim); }
    50% { box-shadow: 0 0 40px var(--primary-dim), 0 0 60px var(--primary-dim); }
}

.tech-spinner--pulsing {
    animation: spin 1s infinite linear, pulse-glow 2s infinite ease-in-out;
}

.loading-text {
    color: var(--primary);
    letter-spacing: 2px;
    font-size: 0.75rem;
    margin-top: 16px;
    text-transform: uppercase;
}

/* --- Empty State --- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
}

.empty-state__icon {
    width: 64px;
    height: 64px;
    color: var(--text-muted);
    opacity: 0.5;
    margin-bottom: 16px;
}

.empty-state__title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
}

.empty-state__description {
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 300px;
}

/* --- Pricing --- */
.price-tag {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    font-family: var(--font-mono);
}

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

.price-box {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
}

/* --- Contact Info --- */
.contact-info strong {
    color: var(--primary);
}

/* --- Footer --- */
.footer {
    margin-top: 40px;
    border-top: 1px solid var(--border);
    padding: 20px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer__links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.footer a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
    padding: 4px 0;
}

.footer a:hover {
    color: var(--primary);
}

.footer__tagline {
    margin-bottom: 8px;
    opacity: 0.75;
}

.footer__copyright {
    margin: 0;
    opacity: 0.5;
}

/* --- Utilities --- */
.fw-bold { font-weight: 600 !important; }
.text-primary { color: var(--primary) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-main { color: var(--text-main) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mt-2 { margin-top: 0.5rem !important; }
.mt-3 { margin-top: 1rem !important; }
.me-2 { margin-right: 0.5rem !important; }
.m-0 { margin: 0 !important; }

.d-none { display: none !important; }
.d-flex { display: flex !important; }

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

.gap-3 { gap: 1rem !important; }
.gap-4 { gap: 1.5rem !important; }

.opacity-75 { opacity: 0.75 !important; }
.opacity-50 { opacity: 0.5 !important; }

.small { font-size: 0.875rem !important; }

.border-bottom { border-bottom: 1px solid var(--border) !important; }
.pb-3 { padding-bottom: 1rem !important; }

.w-100 { width: 100% !important; }

.pt-1 { padding-top: 0.25rem !important; }

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .app-container {
        animation: none;
    }
}

/* --- Focus Visible (keyboard only) --- */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}