/* Mobile-first overrides loaded after every desktop and readability stylesheet. */
@media (max-width: 820px) {
  :root {
    --mobile-topbar-height: 58px;
    --mobile-nav-height: 72px;
    --mobile-page-gutter: 12px;
  }

  html {
    min-width: 0;
    scroll-padding-top: calc(var(--mobile-topbar-height) + 12px);
    scroll-padding-bottom: calc(var(--mobile-nav-height) + env(safe-area-inset-bottom) + 12px);
  }

  body {
    min-width: 0;
    overflow-x: hidden;
    font-size: 14px;
    -webkit-text-size-adjust: 100%;
  }

  button,
  input,
  select,
  textarea,
  summary,
  [role="button"] {
    touch-action: manipulation;
  }

  /* Fixed bottom navigation: keep every destination available without crushing labels. */
  .rail {
    inset: auto 0 0;
    width: 100%;
    height: calc(var(--mobile-nav-height) + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    border: 0;
    border-top: 1px solid var(--line);
    background: rgba(12, 17, 23, .97);
    box-shadow: 0 -10px 28px rgba(0, 0, 0, .28);
    backdrop-filter: blur(16px);
    z-index: 95;
  }

  .brand {
    display: none;
  }

  .rail nav {
    width: 100%;
    height: var(--mobile-nav-height);
    padding: 5px 7px;
    display: flex;
    align-items: stretch;
    justify-content: flex-start;
    gap: 2px;
    overflow-x: auto;
    overflow-y: hidden;
    overscroll-behavior-x: contain;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .rail nav::-webkit-scrollbar,
  .strategy-menu::-webkit-scrollbar,
  .tabs::-webkit-scrollbar,
  .chart-periods::-webkit-scrollbar,
  .chart-tool-strip::-webkit-scrollbar {
    display: none;
  }

  .rail-item {
    width: 68px;
    min-width: 68px;
    height: 60px;
    padding: 5px 3px;
    flex: 0 0 68px;
    gap: 4px;
    border-radius: 8px;
    scroll-snap-align: center;
    font-size: 11px;
    line-height: 1.1;
  }

  .rail-item i {
    font-size: 18px;
  }

  .rail-item.active {
    box-shadow: inset 0 0 0 1px rgba(33, 200, 183, .12);
  }

  /* Compact top bar that still leaves settings and sign-out reachable. */
  .topbar {
    left: 0;
    height: var(--mobile-topbar-height);
    padding: 0 10px 0 12px;
    gap: 8px;
  }

  .wordmark {
    min-width: 0;
    max-width: min(45vw, 180px);
    flex: 1 1 auto;
  }

  .wordmark strong {
    overflow: hidden;
    font-size: 14px;
    line-height: 1.25;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .wordmark span,
  .market-pulse,
  .mode-badge,
  #refreshButton,
  #themeToggle,
  .account-button > span:last-child {
    display: none !important;
  }

  .top-actions {
    min-width: 0;
    gap: 4px;
    flex: 0 0 auto;
  }

  .icon-button,
  .account-button {
    width: 42px;
    min-width: 42px;
    height: 42px;
    padding: 0;
    justify-content: center;
  }

  .account-button {
    gap: 0;
  }

  .avatar {
    width: 36px;
    height: 36px;
  }

  .app {
    width: 100%;
    min-width: 0;
    min-height: 100dvh;
    margin-left: 0;
    padding-top: var(--mobile-topbar-height);
    padding-bottom: calc(var(--mobile-nav-height) + env(safe-area-inset-bottom));
  }

  .page,
  .ai-page {
    width: 100%;
    min-width: 0;
    padding: 18px var(--mobile-page-gutter) 28px;
  }

  .loading-screen {
    min-height: calc(100dvh - var(--mobile-topbar-height) - var(--mobile-nav-height));
    height: auto;
  }

  .page-head {
    margin-bottom: 16px;
    align-items: stretch;
    flex-direction: column;
    gap: 12px;
  }

  .page-head h1 {
    margin-bottom: 4px;
    font-size: 22px;
    line-height: 1.25;
  }

  .page-head p:last-child {
    display: block;
    font-size: 12px;
    line-height: 1.6;
  }

  .page-head .eyebrow {
    display: block;
    margin-bottom: 5px;
  }

  .head-actions,
  .form-actions,
  .strategy-actions,
  .admin-user-actions,
  .admin-affiliate-actions {
    width: 100%;
    display: flex;
    align-items: stretch;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 8px;
  }

  .head-actions > .button,
  .form-actions > .button,
  .strategy-actions > .button,
  .admin-user-actions > .button {
    min-width: min(142px, 100%);
    flex: 1 1 120px;
  }

  /* Touch targets and readable form controls. */
  .button,
  .button.small,
  .tabs button,
  .segmented button,
  .chart-controls button,
  .strategy-menu button,
  .filter-selection-classifiers button,
  .library-category-button {
    min-height: 44px;
  }

  .button,
  .button.small {
    height: 44px;
    padding-inline: 13px;
    font-size: 12px;
  }

  .input-wrap,
  .auth-form .input-wrap,
  .admin-search-select,
  .library-search,
  .filter-selection-search,
  .chart-color-input,
  .live-provider-fields input,
  .ai-provider-fields input:not([type="checkbox"]) {
    min-height: 46px;
    height: 46px;
  }

  .input-wrap input,
  .input-wrap select,
  input,
  select,
  textarea {
    font-size: 16px;
  }

  .field {
    min-width: 0;
    margin-bottom: 14px;
  }

  .field label,
  .modal .field label {
    min-height: 20px;
    font-size: 12px;
    line-height: 1.45;
  }

  .field > small,
  .field label small {
    line-height: 1.5;
  }

  .range-row {
    grid-template-columns: minmax(0, 1fr) 56px;
  }

  .risk-checkbox {
    min-height: 46px;
  }

  /* Convert desktop columns to phone-sized reading order. */
  .content-grid,
  .trade-layout,
  .strategy-layout,
  .editor-layout,
  .editor-report-grid,
  .ai-layout,
  .admin-primary-grid,
  .admin-secondary-grid,
  .partner-share-grid,
  .strategy-share-controls,
  .platform-deposit-payment-body {
    grid-template-columns: minmax(0, 1fr);
  }

  .form-grid,
  .field-row,
  .live-risk-settings .form-grid,
  .live-provider-fields,
  .strategy-backtest-settings,
  .custom-filter-grid,
  .custom-expression-grid,
  .custom-filter-parameter-grid,
  .custom-filter-parameter-grid.everget,
  .admin-affiliate-form,
  .chart-tool-style-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .strategy-backtest-settings > .button,
  .custom-filter-parameter-grid p,
  .custom-filter-parameter-grid.everget p {
    grid-column: 1;
  }

  .stats,
  .market-strip,
  .scanner-grid,
  .backtest-results,
  .editor-metrics,
  .admin-wallet-metrics,
  .admin-affiliate-metrics,
  .partner-stats,
  .market-chart-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .admin-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .admin-stats article,
  .admin-wallet-metrics > div,
  .admin-affiliate-metrics > div,
  .partner-stats article,
  .stat,
  .backtest-results div,
  .editor-metrics div,
  .market-chart-metrics > div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .admin-stats article:nth-child(odd),
  .admin-wallet-metrics > div:nth-child(odd),
  .admin-affiliate-metrics > div:nth-child(odd),
  .partner-stats article:nth-child(odd),
  .stat:nth-child(odd),
  .backtest-results div:nth-child(odd),
  .editor-metrics div:nth-child(odd),
  .market-chart-metrics > div:nth-child(odd) {
    border-right: 1px solid var(--line);
  }

  .admin-stats article:nth-last-child(-n + 2),
  .admin-wallet-metrics > div:nth-last-child(-n + 2),
  .admin-affiliate-metrics > div:nth-last-child(-n + 2),
  .partner-stats article:nth-last-child(-n + 2),
  .stat:nth-last-child(-n + 2),
  .backtest-results div:nth-last-child(-n + 2),
  .editor-metrics div:nth-last-child(-n + 2),
  .market-chart-metrics > div:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .strategy-cards,
  .diagnostic,
  .filter-selection-options {
    grid-template-columns: minmax(0, 1fr);
  }

  .panel {
    min-width: 0;
    border-radius: 8px;
  }

  .panel-head {
    min-height: 58px;
    padding: 10px 13px;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
  }

  .panel-head h2 {
    font-size: 14px;
  }

  .panel-body,
  .admin-panel-body {
    padding: 13px;
  }

  .strategy-menu,
  .tabs,
  .chart-periods,
  .segmented {
    max-width: 100%;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .strategy-menu {
    padding: 7px;
    display: flex;
    gap: 5px;
  }

  .strategy-menu button {
    width: auto;
    min-width: max-content;
    flex: 0 0 auto;
  }

  .tabs button,
  .chart-controls button,
  .segmented button {
    flex: 0 0 auto;
    white-space: nowrap;
  }

  .table-wrap,
  .editor-trades-scroll,
  .platform-record-content {
    max-width: 100%;
    overflow: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .data-table th,
  .data-table td {
    padding: 11px 12px;
  }

  /* Charts and the strategy editor remain usable without horizontal page scrolling. */
  .market-chart-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .market-chart-heading .chart-controls {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    overflow: visible;
  }

  .market-chart-heading .market-candle-source {
    width: 100%;
    min-width: 0;
    height: 44px;
    padding-inline: 10px;
  }

  .market-chart-heading .market-candle-source select {
    min-width: 0;
    max-width: none;
    flex: 1;
    font-size: 13px;
  }

  .market-chart-heading .chart-periods {
    width: 100%;
    grid-column: 1 / -1;
    padding-bottom: 2px;
    gap: 5px;
  }

  .chart-toolbar {
    padding: 7px;
    grid-template-columns: minmax(0, 1fr);
    gap: 7px;
  }

  .chart-tool,
  .chart-action,
  .chart-indicator-picker {
    min-height: 40px;
  }

  .chart-tool {
    padding-inline: 10px;
    font-size: 11px;
  }

  .chart-indicator-picker {
    width: 100%;
    min-width: 0;
    max-width: none;
  }

  .chart-actions {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(5, minmax(40px, 1fr));
    gap: 5px;
  }

  .chart-actions .chart-action {
    width: 100%;
    min-width: 0;
    height: 42px;
    flex-basis: auto;
    border-color: var(--line);
    background: var(--panel);
  }

  .chart-stage {
    grid-template-columns: minmax(0, 1fr);
  }

  .chart-drawing-rail {
    width: 100%;
    height: 48px;
    padding: 4px 6px;
    flex-direction: row;
    align-items: center;
    gap: 4px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    overflow-x: auto;
    overflow-y: hidden;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .chart-drawing-rail::-webkit-scrollbar {
    display: none;
  }

  .chart-rail-button {
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
  }

  .chart-rail-spacer {
    min-width: 4px;
    min-height: 0;
    flex: 0 0 4px;
  }

  .chart-tool-menu {
    position: fixed;
    left: 10px;
    right: 10px;
    top: calc(var(--mobile-topbar-height) + 58px);
    width: auto;
    max-height: min(58dvh, 520px);
    overflow-y: auto;
  }

  .professional-chart {
    height: clamp(430px, 58dvh, 620px);
    min-height: 430px;
  }

  .editor-panel .panel-head,
  .editor-result-head {
    align-items: stretch;
    flex-direction: column;
  }

  .editor-toolbar {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .editor-toolbar .input-wrap {
    width: 100%;
    grid-column: 1 / -1;
  }

  .editor-toolbar .button {
    width: 100%;
  }

  .editor-view-tabs {
    padding: 7px;
    overflow-x: auto;
  }

  .editor-view-tabs button {
    min-width: max-content;
  }

  .condition-area,
  .backtest-settings {
    padding: 14px;
  }

  .code-editor,
  .code-editor.unified {
    min-height: 300px;
    font-size: 13px;
    line-height: 1.75;
  }

  .library-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .editor-equity,
  .editor-trades {
    height: 480px;
  }

  .editor-equity {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  #cancelEditorBacktest,
  #cancelStrategyBacktest {
    position: fixed;
    left: 12px;
    right: 12px;
    width: auto;
    height: 48px;
    z-index: 135;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .48);
  }

  #cancelEditorBacktest {
    bottom: calc(var(--mobile-nav-height) + env(safe-area-inset-bottom) + 10px);
  }

  #cancelStrategyBacktest {
    bottom: calc(env(safe-area-inset-bottom) + 12px);
  }

  /* AI chat gets the first, largest mobile section; supporting panels follow below. */
  .ai-chat-panel {
    height: min(720px, calc(100dvh - 154px));
    min-height: 560px;
    order: -2;
  }

  .ai-skills-panel {
    order: -1;
  }

  .ai-skills {
    display: flex;
    gap: 7px;
    overflow-x: auto;
  }

  .ai-skill {
    min-width: 220px;
    min-height: 76px;
  }

  .ai-message {
    max-width: 94%;
  }

  .ai-message-content {
    font-size: 13px;
    line-height: 1.7;
  }

  .ai-context-row,
  .ai-compose-actions {
    flex-wrap: wrap;
  }

  .ai-optimizer-settings {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  /* Mobile dialogs behave as bottom sheets and never extend behind browser chrome. */
  .modal-backdrop {
    padding: 8px 8px 0;
    place-items: end center;
    overflow: hidden;
    z-index: 120;
  }

  .modal {
    width: 100%;
    max-width: none;
    max-height: calc(100dvh - 8px);
    padding: 18px 16px calc(18px + env(safe-area-inset-bottom));
    border-radius: 14px 14px 0 0;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .modal h2 {
    padding-right: 34px;
    font-size: 20px;
  }

  .modal p {
    font-size: 13px;
  }

  .close-button {
    width: 42px;
    height: 42px;
    right: 10px;
    top: 10px;
  }

  .modal-actions {
    gap: 9px;
    margin-top: 18px;
  }

  .modal-actions .button {
    width: 100%;
  }

  .filter-selection-modal,
  .custom-filter-modal,
  .chart-tool-style-modal,
  .platform-record-modal {
    max-height: calc(100dvh - 8px);
  }

  .filter-selection-classifiers {
    grid-template-columns: minmax(0, 1fr);
  }

  .filter-selection-options {
    max-height: 42dvh;
  }

  .platform-wallet-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .platform-wallet-actions button {
    min-width: 0;
    min-height: 58px;
  }

  .membership-panel {
    grid-template-columns: minmax(0, 1fr);
  }

  .membership-status {
    grid-column: 1;
    grid-row: auto;
  }

  .membership-plan-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .toast-stack {
    left: 10px;
    right: 10px;
    bottom: calc(var(--mobile-nav-height) + env(safe-area-inset-bottom) + 10px);
    z-index: 110;
  }

  .toast {
    width: 100%;
    min-width: 0;
    max-width: none;
    padding: 13px 14px;
    font-size: 13px;
    line-height: 1.5;
  }

  /* Authentication is a true phone screen instead of a scaled desktop card. */
  .auth-gate {
    padding: 0;
    place-items: stretch;
  }

  .auth-shell {
    width: 100%;
    min-height: 100dvh;
    border: 0;
    border-radius: 0;
    display: block;
  }

  .auth-visual {
    display: none;
  }

  .auth-panel {
    width: 100%;
    min-height: 100dvh;
    padding: max(28px, env(safe-area-inset-top)) 18px calc(28px + env(safe-area-inset-bottom));
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .auth-tabs {
    height: 50px;
    margin-bottom: 26px;
  }

  .auth-tabs button {
    font-size: 12px;
  }

  .auth-form {
    gap: 16px;
  }

  .auth-form h2 {
    font-size: 24px;
  }

  .auth-form > div:first-child > small,
  .auth-message {
    font-size: 12px;
  }

  .auth-form .button {
    height: 48px;
  }
}

@media (max-width: 480px) {
  :root {
    --mobile-page-gutter: 10px;
  }

  .wordmark {
    max-width: 42vw;
  }

  .page,
  .ai-page {
    padding-top: 14px;
  }

  .stats,
  .market-strip,
  .scanner-grid,
  .backtest-results,
  .admin-wallet-metrics,
  .admin-affiliate-metrics,
  .market-chart-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .editor-metrics,
  .admin-stats,
  .partner-stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .editor-metrics div,
  .admin-stats article,
  .partner-stats article,
  .editor-metrics div:nth-child(odd),
  .admin-stats article:nth-child(odd),
  .partner-stats article:nth-child(odd) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .editor-metrics div:last-child,
  .admin-stats article:last-child,
  .partner-stats article:last-child {
    border-bottom: 0;
  }

  .head-actions > .button,
  .form-actions > .button,
  .strategy-actions > .button,
  .admin-user-actions > .button {
    min-width: 0;
    flex-basis: calc(50% - 4px);
  }

  .professional-chart {
    height: 52dvh;
    min-height: 390px;
  }

  .editor-equity,
  .editor-trades {
    height: 420px;
  }

  .ai-chat-panel {
    min-height: 540px;
  }

  .ai-optimizer-settings {
    grid-template-columns: minmax(0, 1fr);
  }

  .modal-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 360px) {
  .wordmark {
    max-width: 36vw;
  }

  .topbar {
    padding-inline: 8px;
  }

  .icon-button,
  .account-button {
    width: 40px;
    min-width: 40px;
  }

  .stats,
  .market-strip,
  .scanner-grid,
  .backtest-results,
  .admin-wallet-metrics,
  .admin-affiliate-metrics,
  .market-chart-metrics {
    grid-template-columns: minmax(0, 1fr);
  }

  .stat,
  .backtest-results div,
  .admin-wallet-metrics > div,
  .admin-affiliate-metrics > div,
  .market-chart-metrics > div,
  .stat:nth-child(odd),
  .backtest-results div:nth-child(odd),
  .admin-wallet-metrics > div:nth-child(odd),
  .admin-affiliate-metrics > div:nth-child(odd),
  .market-chart-metrics > div:nth-child(odd) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .stat:last-child,
  .backtest-results div:last-child,
  .admin-wallet-metrics > div:last-child,
  .admin-affiliate-metrics > div:last-child,
  .market-chart-metrics > div:last-child {
    border-bottom: 0;
  }
}