/* ==================================================
   NEURALTREND — RESPONSIVE & ACCESSIBILITY POLISH
   Loaded after all page-level styles so these rules
   intentionally resolve mobile cascade conflicts.
================================================== */

:root {
    --nt-mobile-nav-width: min(86vw, 340px);
}

html {
    scroll-padding-top: calc(var(--nav-height) + 18px);
}

body {
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
}

img,
svg,
canvas {
    max-width: 100%;
}

button,
a,
input,
select,
textarea {
    touch-action: manipulation;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[role="button"]:focus-visible,
[role="tab"]:focus-visible {
    outline: 3px solid rgba(59, 130, 246, 0.30);
    outline-offset: 2px;
}

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

.nt-skip-link {
    position: fixed;
    top: 10px;
    left: 12px;
    z-index: 10000;
    transform: translateY(-160%);
    padding: 10px 14px;
    border-radius: 9px;
    background: #ffffff;
    color: #0f172a;
    font-size: 13px;
    font-weight: 850;
    text-decoration: none;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.24);
    transition: transform 0.16s ease;
}

.nt-skip-link:focus {
    transform: translateY(0);
}

#nt-main-content:focus {
    outline: 0;
}

/* ==================================================
   MOBILE NAVIGATION
================================================== */

.nt-mobile-nav-toggle,
.nt-mobile-nav-backdrop {
    display: none;
}

.nt-mobile-nav-toggle {
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 11px;
    background: rgba(255, 255, 255, 0.07);
    color: #ffffff;
}

.nt-mobile-nav-toggle span {
    display: block;
    width: 19px;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
    transition: transform 0.18s ease, opacity 0.18s ease;
}

body.nt-mobile-nav-open .nt-mobile-nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

body.nt-mobile-nav-open .nt-mobile-nav-toggle span:nth-child(2) {
    opacity: 0;
}

body.nt-mobile-nav-open .nt-mobile-nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==================================================
   SHARED COMPACT STATES
================================================== */

.nt-mobile-table-hint {
    display: none;
}

.nt-board-state {
    min-height: 132px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 24px;
    color: #64748b;
    font-size: 13px;
    font-weight: 750;
    text-align: center;
}

.nt-board-state-icon {
    display: inline-grid;
    place-items: center;
    width: 30px;
    height: 30px;
    flex: 0 0 30px;
    border-radius: 9px;
    background: #f1f5f9;
    color: #475569;
    font-weight: 950;
}

.nt-board-state-error {
    color: #991b1b;
}

.nt-board-state-error .nt-board-state-icon {
    background: #fef2f2;
    color: #dc2626;
}

.nt-board-state-loading {
    min-height: 190px;
    display: grid;
    gap: 9px;
    align-content: center;
}

.nt-board-skeleton-row {
    display: grid;
    grid-template-columns: 1.4fr repeat(3, 0.75fr);
    gap: 12px;
    width: min(780px, 100%);
}

.nt-board-skeleton {
    display: block;
    height: 19px;
    border-radius: 7px;
    background: linear-gradient(90deg, #e2e8f0 20%, #f8fafc 50%, #e2e8f0 80%);
    background-size: 220% 100%;
    animation: nt-skeleton-shimmer 1.25s linear infinite;
}

.nt-board-skeleton-wide {
    height: 28px;
}

@keyframes nt-skeleton-shimmer {
    to { background-position: -220% 0; }
}

.nt-board-loading-copy {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    width: 100%;
    margin-bottom: 3px;
    color: #475569;
    font-size: 13px;
    font-weight: 800;
}

.nt-board-loading-spinner {
    width: 17px;
    height: 17px;
    flex: 0 0 17px;
    border: 2px solid #cbd5e1;
    border-top-color: #2563eb;
    border-radius: 50%;
    animation: nt-board-loading-spin 0.75s linear infinite;
}

@keyframes nt-board-loading-spin {
    to { transform: rotate(360deg); }
}

/* ==================================================
   TABLET LAYOUT
================================================== */

@media (min-width: 681px) and (max-width: 980px) {
    .nt-home-proof-grid,
    .nt-home-product-grid,
    .nt-home-resource-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    }

    .nt-home-product-grid > :last-child:nth-child(odd),
    .nt-home-resource-grid > :last-child:nth-child(odd) {
        grid-column: 1 / -1;
    }

    .nt-home-step-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    }
}

/* ==================================================
   MOBILE / SMALL TABLET
================================================== */

@media (max-width: 860px) {
    :root {
        --nav-height: 70px;
    }

    body.nt-mobile-nav-open {
        overflow: hidden;
    }

    .navbar {
        display: grid !important;
        grid-template-columns: auto minmax(0, 1fr) auto auto;
        gap: 8px !important;
        overflow: visible !important;
        padding: 7px 12px !important;
    }

    .navbar .logo {
        min-width: 0;
    }

    .navbar .logo img {
        height: 50px !important;
        max-width: 150px;
    }

    .nt-mobile-nav-toggle {
        display: inline-flex;
        grid-column: 3;
    }

    .navbar .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        z-index: 1002;
        width: var(--nt-mobile-nav-width);
        height: calc(100dvh - var(--nav-height));
        display: flex !important;
        flex-direction: column;
        align-items: stretch !important;
        gap: 4px !important;
        padding: 18px 14px max(24px, env(safe-area-inset-bottom));
        overflow-y: auto;
        background: #0f172a;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        border-right: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: 18px 0 42px rgba(2, 6, 23, 0.32);
        transform: translateX(-104%);
        visibility: hidden;
        transition: transform 0.20s ease, visibility 0.20s ease;
    }

    body.nt-mobile-nav-open .navbar .nav-links {
        transform: translateX(0);
        visibility: visible;
    }

    .navbar .nav-links a {
        width: 100%;
        min-height: 44px;
        display: flex;
        align-items: center;
        margin: 0 !important;
        padding: 10px 12px !important;
        border-radius: 10px !important;
        font-size: 14px !important;
    }

    .navbar .nav-links a.active,
    .navbar .nav-links a[aria-current="page"] {
        background: rgba(59, 130, 246, 0.20) !important;
        color: #ffffff !important;
    }

    .nt-mobile-nav-backdrop {
        position: fixed;
        inset: var(--nav-height) 0 0;
        /* Keep the overlay below the fixed navbar stacking context so the
           slide-out navigation remains clickable on mobile Safari. */
        z-index: 999;
        width: 100%;
        height: auto;
        padding: 0;
        border: 0;
        background: rgba(2, 6, 23, 0.58);
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.18s ease, visibility 0.18s ease;
    }

    body.nt-mobile-nav-open .nt-mobile-nav-backdrop {
        display: block;
        opacity: 1;
        visibility: visible;
    }

    .auth-area {
        grid-column: 4;
        min-width: 0;
        margin-left: 0 !important;
    }

    #login-btn,
    .user-pill {
        min-height: 40px;
        padding: 7px 10px !important;
    }

    .nt-account-trigger {
        max-width: 185px;
    }

    .nt-account-trigger-email {
        max-width: 105px;
    }

    input,
    select,
    textarea {
        font-size: 16px !important;
    }

    .dropdown.nt-account-dropdown {
        position: fixed;
        top: calc(var(--nav-height) + 8px);
        right: 10px;
        width: min(360px, calc(100vw - 20px));
        max-height: calc(100dvh - var(--nav-height) - 18px);
        overflow-y: auto;
    }

    main {
        padding-top: calc(var(--nav-height) + 14px) !important;
    }

    .nt-page-container {
        width: min(100% - 24px, 1540px) !important;
    }

    .nt-dashboard-intro {
        padding: 20px;
    }

    .nt-dashboard-intro-actions {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: 100%;
    }

    .nt-dashboard-intro-actions a {
        width: 100%;
        text-align: center;
    }

    .nt-dashboard-intro-actions a:last-child:nth-child(odd) {
        grid-column: 1 / -1;
    }

    /* Horizontal, snap-based model selection prevents a very tall mobile page. */
    .nt-product-card-grid {
        display: flex !important;
        gap: 12px !important;
        overflow-x: auto !important;
        overflow-y: visible !important;
        padding: 2px 2px 12px !important;
        scroll-snap-type: x mandatory;
        overscroll-behavior-inline: contain;
        scrollbar-width: thin;
    }

    .nt-product-card-grid .nt-product-card {
        flex: 0 0 min(78vw, 310px) !important;
        min-width: min(78vw, 310px) !important;
        min-height: 184px !important;
        scroll-snap-align: start;
    }

    .nt-product-card.active::after {
        display: none !important;
    }

    .nt-model-content {
        padding: 10px !important;
    }

    .nt-model-summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 9px !important;
    }

    .nt-model-summary-card {
        padding: 11px !important;
    }

    .nt-epoch-tool-tabs {
        display: flex !important;
        gap: 8px !important;
        overflow-x: auto;
        padding: 3px 2px 10px;
        scroll-snap-type: x mandatory;
        scrollbar-width: thin;
    }

    .nt-epoch-tool-tab {
        flex: 0 0 min(68vw, 230px);
        min-width: min(68vw, 230px);
        scroll-snap-align: start;
    }

    .nt-period-pills,
    .nt-asset-pills,
    .nt-live-sim-status-pills,
    .nt-market-hero-periods {
        width: 100%;
        max-width: 100%;
        justify-content: flex-start;
        overflow-x: auto;
        overflow-y: hidden;
        flex-wrap: nowrap !important;
        scrollbar-width: thin;
        overscroll-behavior-inline: contain;
    }

    .period-pill,
    .asset-pill,
    .nt-live-sim-status-pill,
    .nt-market-hero-period {
        flex: 0 0 auto;
    }

    .nt-controls-card,
    .nt-preview-card,
    .nt-backtest-section,
    .nt-live-sim-section,
    .nt-epoch-tool-content-card {
        padding: 14px !important;
        border-radius: 15px !important;
    }

    .nt-watchlist-toolbar {
        align-items: stretch;
        flex-direction: column;
    }

    .nt-watchlist-primary-btn,
    .nt-watchlist-alert-control {
        width: 100%;
    }

    .nt-watchlist-message {
        width: 100%;
        margin-left: 0;
    }

    .nt-metric-grid,
    .nt-risk-metric-grid,
    .nt-preview-risk-grid,
    .nt-backtest-results-grid,
    .nt-backtest-risk-grid,
    .nt-live-sim-metric-grid,
    .nt-live-sim-metric-grid-compact {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 9px !important;
    }

    .nt-metric-card {
        min-height: 96px !important;
        padding: 13px !important;
        gap: 10px !important;
    }

    .nt-card-icon {
        width: 40px !important;
        height: 40px !important;
        flex-basis: 40px !important;
        border-radius: 11px !important;
        font-size: 18px !important;
    }

    .nt-metric-value,
    .nt-result-value,
    .nt-live-sim-metric-value {
        font-size: 20px !important;
    }

    .nt-mobile-table-hint {
        display: block;
        margin: 0;
        padding: 8px 11px;
        border-bottom: 1px solid #e2e8f0;
        background: #eff6ff;
        color: #1e40af;
        font-size: 10.5px;
        line-height: 1.4;
        font-weight: 800;
    }

    .nt-signal-table-card {
        position: relative;
        overflow-x: auto !important;
        overscroll-behavior-inline: contain;
        scrollbar-width: thin;
        -webkit-overflow-scrolling: touch;
    }

    .nt-signal-header > div:first-child {
        position: sticky;
        left: 0;
        z-index: 5;
        align-self: stretch;
        display: flex;
        align-items: center;
        padding-left: 2px;
        background: #f8fafc;
        box-shadow: 8px 0 12px -12px rgba(15, 23, 42, 0.55);
    }

    #signal-board .signal-row > .signal-ticker-cell {
        position: sticky;
        left: 0;
        z-index: 3;
        min-height: 48px;
        background: #ffffff;
        box-shadow: 8px 0 12px -12px rgba(15, 23, 42, 0.55);
    }

    #signal-board .signal-row:hover > .signal-ticker-cell {
        background: var(--nt-row-hover);
    }

    #signal-board .signal-row.selected > .signal-ticker-cell {
        background: var(--nt-selected-row);
    }

    .nt-preview-meta {
        gap: 6px;
    }

    .nt-preview-chip {
        font-size: 10.5px;
    }

    .nt-preview-chart,
    .nt-backtest-chart-shell,
    .nt-live-sim-chart-shell,
    .nt-live-sim-chart-shell-compact {
        height: 290px !important;
    }

    .nt-backtest-section .form-row,
    .nt-live-sim-form-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    }

    .nt-live-sim-board-top-buttons,
    .nt-live-sim-selected-actions-buttons,
    .nt-live-sim-actions {
        width: 100%;
    }

    .nt-live-sim-board-top-buttons > button,
    .nt-live-sim-selected-actions-buttons > button,
    .nt-live-sim-actions > button {
        flex: 1 1 150px;
        min-height: 42px;
    }

    .nt-live-sim-trades-table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .nt-live-trade-row,
    .nt-live-sim-trades-card-side .nt-live-trade-row {
        min-width: 650px;
    }

    .nt-sticky-legal-footer-inner {
        justify-content: flex-start !important;
        overflow-x: auto;
        flex-wrap: nowrap !important;
        scrollbar-width: none;
    }

    .nt-sticky-legal-footer-inner::-webkit-scrollbar {
        display: none;
    }

    .nt-sticky-legal-footer a {
        flex: 0 0 auto;
        white-space: nowrap;
    }

    .modal,
    .nt-account-modal {
        padding: 14px;
    }

    .modal-content,
    .nt-account-modal-panel {
        width: min(100%, 500px) !important;
        max-height: calc(100dvh - 28px);
        overflow-y: auto;
    }
}

@media (max-width: 680px) {
    .nt-home-proof-grid,
    .nt-home-product-grid,
    .nt-home-step-grid,
    .nt-home-resource-grid,
    .nt-home-plan-grid {
        grid-template-columns: 1fr !important;
    }

    .nt-home-product-grid > :last-child,
    .nt-home-resource-grid > :last-child {
        grid-column: auto;
    }

    .nt-home-section {
        margin: 42px 0;
    }

    .nt-home-product-card {
        min-height: 0;
        padding: 20px;
    }

    .nt-home-how,
    .nt-home-dashboard-cta,
    .nt-home-contact {
        border-radius: 17px;
    }

    .nt-home-dashboard-actions {
        flex-direction: column;
    }

    .nt-market-hero-grid {
        padding: 22px 16px !important;
    }

    .nt-market-hero-title {
        font-size: clamp(33px, 10vw, 42px) !important;
    }

    .nt-market-hero-actions,
    .nt-market-hero-btn {
        width: 100%;
    }

    .nt-market-hero-assets {
        display: flex !important;
        width: 100%;
        overflow-x: auto;
        gap: 7px;
        padding-bottom: 4px;
        scroll-snap-type: x mandatory;
        scrollbar-width: thin;
    }

    .nt-market-hero-asset-btn,
    .nt-market-hero-more-assets {
        flex: 0 0 132px;
        width: 132px !important;
        min-width: 132px;
        scroll-snap-align: start;
    }

    .nt-market-hero-more-assets {
        grid-column: auto !important;
    }

    .nt-market-hero-chart-card {
        padding: 12px !important;
        border-radius: 16px !important;
    }

    .nt-market-hero-chart-shell {
        height: 250px !important;
    }

    .nt-market-hero-chart-footer {
        align-items: flex-start;
        flex-direction: column;
    }

    .nt-dashboard-intro-actions {
        grid-template-columns: 1fr;
    }

    .nt-dashboard-intro-actions a:last-child:nth-child(odd) {
        grid-column: auto;
    }

    .nt-data-freshness-strip,
    .nt-live-sim-freshness-strip {
        width: 100%;
    }
}

@media (max-width: 460px) {
    :root {
        --nav-height: 66px;
    }

    .navbar {
        grid-template-columns: auto minmax(0, 1fr) auto auto;
        padding: 6px 9px !important;
    }

    .navbar .logo img {
        height: 46px !important;
        max-width: 125px;
    }

    .nt-mobile-nav-toggle {
        width: 39px;
        height: 39px;
    }

    #login-btn {
        padding: 7px 11px !important;
    }

    .nt-account-trigger {
        width: 42px;
        min-width: 42px;
        justify-content: center;
        padding: 6px !important;
    }

    .nt-account-trigger-email,
    .nt-account-trigger .arrow {
        display: none;
    }

    .nt-page-container {
        width: calc(100% - 16px) !important;
    }

    .nt-dashboard-intro,
    .nt-model-content,
    .nt-controls-card,
    .nt-preview-card,
    .nt-backtest-section,
    .nt-live-sim-section,
    .nt-epoch-tool-content-card {
        padding: 11px !important;
    }

    .nt-model-summary-grid,
    .nt-metric-grid,
    .nt-risk-metric-grid,
    .nt-preview-risk-grid,
    .nt-backtest-results-grid,
    .nt-backtest-risk-grid,
    .nt-live-sim-metric-grid,
    .nt-live-sim-metric-grid-compact,
    .nt-backtest-section .form-row,
    .nt-live-sim-form-grid {
        grid-template-columns: 1fr !important;
    }

    .nt-product-card-grid .nt-product-card {
        flex-basis: 84vw !important;
        min-width: 84vw !important;
    }

    .nt-epoch-tool-tab {
        flex-basis: 76vw;
        min-width: 76vw;
    }

    .nt-market-hero-chart-shell,
    .nt-preview-chart,
    .nt-backtest-chart-shell,
    .nt-live-sim-chart-shell,
    .nt-live-sim-chart-shell-compact {
        height: 240px !important;
    }

    .nt-board-skeleton-row {
        grid-template-columns: 1.4fr repeat(2, 0.8fr);
    }

    .nt-board-skeleton-row span:last-child {
        display: none;
    }
}

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