.app-shell {
        min-height: 100vh;
        background:
          linear-gradient(var(--hero-start) 0, var(--hero-end) 170px),
          var(--background);
      }

      .search {
        position: relative;
        width: min(360px, 34vw);
      }

      .search input {
        width: 100%;
        height: 34px;
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        background: var(--surface-elevated);
        color: var(--text-primary);
        outline: none;
        padding: 0 74px 0 34px;
        transition: border-color 120ms ease, box-shadow 120ms ease;
      }

      .search input:focus {
        border-color: var(--accent);
        box-shadow: 0 0 0 3px var(--accent-subtle);
      }

      .search-icon {
        position: absolute;
        top: 50%;
        left: 11px;
        width: 15px;
        height: 15px;
        color: var(--text-tertiary);
        transform: translateY(-50%);
      }

      .shortcut {
        position: absolute;
        top: 50%;
        right: 8px;
        border: 1px solid var(--border-light);
        border-radius: var(--radius-sm);
        color: var(--text-tertiary);
        font-size: 11px;
        line-height: 1;
        padding: 4px 6px;
        transform: translateY(-50%);
      }

      .icon-button {
        display: grid;
        width: 32px;
        height: 32px;
        place-items: center;
        border: 1px solid transparent;
        border-radius: var(--radius-md);
        background: transparent;
        color: var(--text-secondary);
        transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
      }

      .icon-button:hover {
        border-color: var(--border-light);
        background: var(--muted-background);
        color: var(--text-primary);
      }

      .icon-button svg {
        width: 16px;
        height: 16px;
      }

      main {
        max-width: 1240px;
        margin: 0 auto;
        padding: 30px 24px 56px;
      }

      .page-head {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        gap: 24px;
        margin-bottom: 18px;
      }

      .title-group h1 {
        margin: 0;
        color: var(--text-primary);
        font-family: var(--font-heading);
        font-size: 26px;
        font-weight: 650;
        letter-spacing: 0;
        line-height: 1.25;
      }

      .title-group p {
        margin: 6px 0 0;
        color: var(--text-secondary);
        font-size: 13px;
      }

      .meta-actions {
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--text-tertiary);
        font-size: 12px;
        white-space: nowrap;
      }

      .quiet-button {
        display: inline-flex;
        align-items: center;
        gap: 7px;
        height: 32px;
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        background: var(--surface-elevated);
        color: var(--text-secondary);
        padding: 0 10px;
        transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
      }

      .quiet-button:hover {
        border-color: var(--border-light);
        background: var(--muted-background);
        color: var(--text-primary);
      }

      .quiet-button svg {
        width: 15px;
        height: 15px;
      }

      .quiet-button.is-primary {
        background: var(--text-primary);
        border-color: var(--text-primary);
        color: var(--background);
      }

      .quiet-button.is-primary:hover {
        background: var(--accent);
        border-color: var(--accent);
        color: var(--background);
      }

      .home-settings-dialog {
        width: min(680px, calc(100vw - 28px));
        max-height: min(720px, calc(100vh - 40px));
        overflow: hidden;
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        background: var(--surface-elevated);
        box-shadow: 0 24px 80px rgb(0 0 0 / 22%);
        color: var(--text-primary);
        padding: 0;
      }

      .home-settings-dialog::backdrop {
        background: rgb(0 0 0 / 42%);
        backdrop-filter: blur(6px);
      }

      .home-settings-panel {
        display: grid;
        max-height: min(720px, calc(100vh - 40px));
        grid-template-rows: auto minmax(0, 1fr) auto;
      }

      .home-settings-head {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 16px;
        border-bottom: 1px solid var(--border-light);
        padding: 16px;
      }

      .home-settings-kicker {
        margin: 0 0 4px;
        color: var(--text-tertiary);
        font-size: 11px;
        font-weight: 700;
        letter-spacing: 0.12em;
      }

      .home-settings-head h2 {
        margin: 0;
        color: var(--text-primary);
        font-family: var(--font-heading);
        font-size: 18px;
        font-weight: 700;
        letter-spacing: 0;
        line-height: 1.25;
      }

      .home-settings-body {
        min-height: 0;
        overflow: auto;
        padding: 14px 16px 16px;
      }

      .home-settings-note {
        margin: 0 0 12px;
        color: var(--text-secondary);
        font-size: 13px;
        line-height: 1.55;
      }

      .settings-category-list {
        display: grid;
        gap: 14px;
      }

      .settings-category {
        display: grid;
        gap: 9px;
        border-bottom: 1px solid var(--border-light);
        padding-bottom: 14px;
      }

      .settings-category:last-child {
        border-bottom: 0;
        padding-bottom: 0;
      }

      .settings-category-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
      }

      .settings-category-head h3 {
        margin: 0;
        color: var(--text-primary);
        font-size: 14px;
        font-weight: 700;
        letter-spacing: 0;
      }

      .settings-category-head span {
        color: var(--text-tertiary);
        font-size: 12px;
        font-variant-numeric: tabular-nums;
      }

      .settings-platform-list {
        display: grid;
        gap: 7px;
        margin: 0;
        padding: 0;
      }

      .settings-platform-chip {
        display: grid;
        grid-template-columns: auto minmax(0, 1fr) auto;
        align-items: center;
        gap: 8px;
        min-height: 42px;
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        background: var(--surface);
        padding: 7px 8px;
        will-change: transform;
        transition:
          background-color 140ms ease,
          border-color 140ms ease,
          box-shadow 140ms ease,
          opacity 140ms ease,
          transform 140ms cubic-bezier(.2,.8,.2,1);
      }

      .settings-platform-chip:hover {
        border-color: var(--border-light);
        background: var(--muted-background);
      }

      .settings-platform-chip.is-hidden {
        opacity: 0.58;
      }

      .settings-platform-chip.is-sortable-chosen,
      .settings-platform-chip.is-sortable-drag {
        border-color: var(--text-primary);
        box-shadow: 0 10px 28px rgb(0 0 0 / 14%);
        opacity: 0.9;
        transform: scale(1.015);
        z-index: 2;
      }

      .settings-platform-chip.is-sortable-ghost {
        border-color: var(--text-primary);
        background: var(--accent-subtle);
        opacity: 0.28;
      }

      .settings-platform-chip.is-sortable-fallback {
        box-shadow: 0 16px 38px rgb(0 0 0 / 22%);
        opacity: 0.96;
      }

      .settings-drag-handle {
        display: grid;
        flex: none;
        width: 24px;
        height: 26px;
        place-items: center;
        border: 0;
        border-radius: var(--radius-sm);
        background: transparent;
        color: var(--text-tertiary);
        cursor: grab;
        padding: 0;
        user-select: none;
        touch-action: none;
      }

      .settings-drag-handle:hover {
        background: var(--accent-subtle);
        color: var(--text-primary);
      }

      .settings-drag-handle:active {
        cursor: grabbing;
      }

      .settings-drag-handle:focus-visible {
        box-shadow: 0 0 0 3px var(--accent-subtle);
        outline: 0;
      }

      .settings-drag-handle svg {
        width: 16px;
        height: 16px;
      }

      .settings-platform-name {
        overflow: hidden;
        color: var(--text-primary);
        font-size: 13px;
        font-weight: 550;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .settings-icon-button {
        display: grid;
        width: 32px;
        height: 32px;
        place-items: center;
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        background: var(--surface-elevated);
        color: var(--text-secondary);
        padding: 0;
        transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
      }

      .settings-icon-button:hover:not(:disabled) {
        border-color: var(--border-light);
        background: var(--muted-background);
        color: var(--text-primary);
      }

      .settings-icon-button:disabled {
        cursor: not-allowed;
        opacity: 0.42;
      }

      .settings-icon-button svg {
        width: 16px;
        height: 16px;
      }

      .settings-switch {
        display: inline-flex;
        align-items: center;
      }

      .settings-switch input {
        position: absolute;
        width: 1px;
        height: 1px;
        opacity: 0;
        pointer-events: none;
      }

      .settings-switch span {
        position: relative;
        display: block;
        width: 34px;
        height: 20px;
        border: 1px solid var(--border);
        border-radius: 999px;
        background: var(--muted-background);
        transition: background-color 140ms ease, border-color 140ms ease;
      }

      .settings-switch span::after {
        position: absolute;
        top: 3px;
        left: 3px;
        width: 12px;
        height: 12px;
        border-radius: 999px;
        background: var(--text-tertiary);
        content: "";
        transition: background-color 140ms ease, transform 140ms ease;
      }

      .settings-switch input:checked + span {
        border-color: var(--text-primary);
        background: var(--text-primary);
      }

      .settings-switch input:checked + span::after {
        background: var(--background);
        transform: translateX(14px);
      }

      .settings-switch input:focus-visible + span {
        box-shadow: 0 0 0 3px var(--accent-subtle);
      }

      .settings-switch input:disabled + span {
        cursor: not-allowed;
        opacity: 0.52;
      }

      .home-settings-foot {
        display: flex;
        justify-content: flex-end;
        gap: 10px;
        border-top: 1px solid var(--border-light);
        padding: 12px 16px;
      }

      .overview {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 12px;
        margin-bottom: 18px;
      }

      .stat {
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        background: var(--surface-elevated);
        box-shadow: var(--card-shadow);
        padding: 13px 14px;
      }

      .stat-label {
        color: var(--text-tertiary);
        font-size: 12px;
      }

      .stat-value {
        margin-top: 4px;
        color: var(--text-primary);
        font-size: 18px;
        font-weight: 650;
      }

      .category-stack {
        display: grid;
        gap: 30px;
      }

      .category-section {
        display: grid;
        gap: 12px;
      }

      .category-head {
        display: flex;
        align-items: flex-end;
        border-bottom: 1px solid var(--border-light);
        padding-bottom: 10px;
      }

      .category-head h2 {
        margin: 0;
        color: var(--text-primary);
        font-family: var(--font-heading);
        font-size: 18px;
        font-weight: 700;
        letter-spacing: -0.02em;
        line-height: 1.2;
      }

      .empty-state {
        display: grid;
        align-content: center;
        min-height: calc(100vh - 170px);
        max-width: 560px;
        margin: 0 auto;
        padding: 56px 0 72px;
        text-align: center;
      }

      .empty-kicker {
        margin: 0 0 12px;
        color: var(--text-tertiary);
        font-size: 11px;
        font-weight: 700;
        letter-spacing: 0.14em;
      }

      .empty-state h1 {
        margin: 0;
        color: var(--text-primary);
        font-family: var(--font-heading);
        font-size: clamp(24px, 4vw, 34px);
        font-weight: 700;
        letter-spacing: -0.03em;
        line-height: 1.18;
      }

      .empty-state p:last-child {
        max-width: 34em;
        margin: 14px auto 0;
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.65;
      }

      .platform-grid {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 14px;
        align-items: start;
      }

      .platform-card {
        display: flex;
        flex-direction: column;
        overflow: hidden;
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        background: var(--surface);
        box-shadow: var(--card-shadow);
      }

      .platform-card[hidden],
      .category-section[hidden] {
        display: none;
      }

      .platform-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        min-height: 50px;
        border-bottom: 1px solid var(--border-light);
        padding: 12px 14px;
      }

      .platform-title {
        display: flex;
        align-items: center;
        gap: 9px;
        min-width: 0;
      }

      .platform-icon {
        display: block;
        width: 16px;
        height: 16px;
        flex: 0 0 auto;
      }

      .platform-title h3 {
        overflow: hidden;
        margin: 0;
        color: var(--text-primary);
        font-family: var(--font-heading);
        font-size: 14px;
        font-weight: 650;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .platform-meta {
        color: var(--text-tertiary);
        font-size: 12px;
        white-space: nowrap;
      }

      .card-refresh {
        display: grid;
        width: 28px;
        height: 28px;
        place-items: center;
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        background: var(--surface-elevated);
        color: var(--text-secondary);
        padding: 0;
        transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
      }

      .card-refresh:disabled {
        cursor: progress;
        opacity: 0.72;
      }

      .card-refresh:hover {
        border-color: var(--border-light);
        background: var(--muted-background);
        color: var(--text-primary);
      }

      .card-refresh svg {
        width: 15px;
        height: 15px;
        transition: transform 260ms ease;
      }

      .card-refresh:hover svg {
        transform: rotate(24deg);
      }

      .platform-card.is-refreshing .card-refresh svg {
        animation: refresh-spin 760ms linear infinite;
      }

      .hot-list {
        max-height: 440px;
        margin: 0;
        overflow-y: auto;
        padding: 0;
        list-style: none;
        overscroll-behavior: contain;
        scrollbar-width: thin;
        scrollbar-color: var(--border-light) transparent;
      }

      .hot-list::-webkit-scrollbar {
        width: 8px;
      }

      .hot-list::-webkit-scrollbar-track {
        background: transparent;
      }

      .hot-list::-webkit-scrollbar-thumb {
        border: 2px solid var(--surface);
        border-radius: 999px;
        background: var(--border-light);
      }

      .hot-item {
        display: grid;
        grid-template-columns: 30px minmax(0, 1fr) auto;
        gap: 8px;
        align-items: start;
        min-height: 44px;
        border-bottom: 1px solid var(--border-light);
        padding: 9px 12px;
        transition: background-color 120ms ease;
      }

      .hot-item:last-child {
        border-bottom: 0;
      }

      .hot-item:hover {
        background: var(--subtle-background);
      }

      .rank {
        color: var(--text-tertiary);
        font-size: 12px;
        font-variant-numeric: tabular-nums;
        line-height: 22px;
      }

      .rank.top {
        color: var(--text-primary);
        font-weight: 650;
      }

      .hot-topic {
        min-width: 0;
      }

      .hot-title {
        display: block;
        overflow: hidden;
        color: var(--text-primary);
        font-size: 14px;
        font-weight: 600;
        line-height: 23px;
        text-decoration: none;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .heat {
        color: var(--text-tertiary);
        font-size: 12px;
        font-variant-numeric: tabular-nums;
        line-height: 22px;
        white-space: nowrap;
      }

      .card-foot {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-top: -1px;
        border-top: 1px solid var(--border-light);
        background: var(--subtle-background);
        color: var(--text-tertiary);
        font-size: 12px;
        padding: 9px 12px;
      }

      .card-foot strong {
        color: var(--text-primary);
        font-weight: 500;
      }

      .toast-host {
        position: fixed;
        top: 74px;
        left: 50%;
        width: max-content;
        max-width: calc(100vw - 36px);
        z-index: 20;
        display: grid;
        gap: 8px;
        justify-items: center;
        pointer-events: none;
        transform: translateX(-50%);
      }

      .skin-switch-note {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        border-bottom: 1px solid var(--border-light);
        background: var(--surface);
        color: var(--text-secondary);
        font-size: 13px;
        padding: 9px 24px;
        text-align: center;
      }

      .skin-switch-note a {
        color: var(--text-primary);
        font-weight: 650;
        text-decoration: underline;
        text-underline-offset: 3px;
      }

      .skin-switch-note a:hover {
        color: var(--accent);
      }

      .toast {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 0;
        max-width: 100%;
        border: 1px solid var(--border);
        border-radius: 999px;
        background: var(--surface-elevated);
        box-shadow: 0 12px 32px rgb(0 0 0 / 10%);
        color: var(--text-primary);
        font-size: 13px;
        font-weight: 520;
        opacity: 0;
        padding: 10px 18px;
        text-align: center;
        white-space: nowrap;
        transform: translateY(-8px) scale(0.98);
        transition: opacity 160ms ease, transform 160ms ease;
      }

      .toast.is-visible {
        opacity: 1;
        transform: translateY(0) scale(1);
      }

      .toast.is-error {
        border-color: color-mix(in srgb, var(--danger) 38%, var(--border));
        color: var(--danger);
      }

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

      @media (prefers-reduced-motion: reduce) {
        .settings-platform-chip {
          transition: none;
          will-change: auto;
        }
      }

      @media (max-width: 1080px) {
        .platform-grid {
          grid-template-columns: repeat(2, minmax(0, 1fr));
        }

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

      }

      @media (max-width: 760px) {
        .search {
          order: 3;
          width: 100%;
        }

        main {
          padding: 24px 14px calc(72px + env(safe-area-inset-bottom, 0px));
        }

        .page-head {
          align-items: flex-start;
          flex-direction: column;
          gap: 12px;
        }

        .title-group h1 {
          font-size: 23px;
        }

        .meta-actions {
          width: 100%;
          justify-content: space-between;
        }

        .home-settings-head,
        .home-settings-body,
        .home-settings-foot {
          padding-right: 12px;
          padding-left: 12px;
        }

        .home-settings-foot {
          flex-direction: column-reverse;
        }

        .home-settings-foot .quiet-button {
          justify-content: center;
          width: 100%;
        }

        .settings-platform-chip {
          grid-template-columns: auto minmax(0, 1fr) auto;
        }

        .category-stack {
          gap: 26px;
        }

        .overview,
        .platform-grid {
          grid-template-columns: 1fr;
        }

        .hot-list {
          max-height: none;
          overflow-y: visible;
          overscroll-behavior: auto;
        }

        .skin-switch-note {
          flex-direction: column;
          align-items: flex-start;
          gap: 4px;
          padding: 9px 16px;
          text-align: left;
        }
      }