/* ========================================
   TopBar 统一导航栏样式 — Flex + Width 驱动
   ======================================== */

:root {
    --left-panel-width: 500px;
}

@media (max-width: 1200px) {
    :root {
        --left-panel-width: 35%;
    }
}

body {
    overflow: hidden;
    height: 100vh;
    transition: none;
}

.top-bar {
    position: fixed;
    top: 0;
    left: var(--bar-left, 0px);
    right: 0;
    height: 72px;
    background-color: rgba(255, 254, 247, 0.55);
    /* Live frosted glass over scrolling content. 20px stays perceptually
       frosted on a 72px bar while keeping the per-frame backdrop re-sample
       small — 40px roughly quadrupled the raster work and showed up as a
       measurable idle-frame cost with the wallpaper animating behind it. */
    backdrop-filter: blur(20px) saturate(180%);
    border: none;
    border-bottom: 1px solid rgba(0, 0, 0, 0.2);
    color: #0a0a0a;
    border-radius: 0;
    z-index: var(--z-bar, 2000);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    box-sizing: border-box;
    box-shadow: var(--shadow-float);
    transform: translateY(var(--nav-translate-y, 0));
    transition:
        left 0.35s var(--curve-snap),
        transform 0.3s var(--curve-standard),
        opacity 0.4s var(--curve-delicate),
        background-color var(--transition-normal),
        border-bottom-color var(--transition-normal),
        color var(--transition-normal),
        box-shadow var(--transition-normal);
    view-transition-name: top-bar;
}

/* Fresh-load entrance: the bar slides/fades down from the top once the page
   paints. The transform offset rides on top of the existing --nav-translate-y
   transform (which is 0 at the top, so there is no conflict during the brief
   entrance), and reverts to it once html.is-entering is dropped. */
html.is-entering .top-bar {
    opacity: 0;
    transform: translateY(-24px);
}

[data-theme='dark'] .top-bar {
    background-color: rgba(18, 18, 18, 0.8);
    border-bottom-color: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    box-shadow: var(--shadow-float);
}

.top-bar-left {
    display: flex;
    align-items: center;
    align-self: stretch;
    flex-shrink: 0;
    width: var(--left-width, 0px);
    /* Clip only the width-expand reveal; full bar height so scale is not cropped. */
    overflow: hidden;
    color: inherit;
    text-decoration: none;
    cursor: pointer;
    white-space: nowrap;
    transition:
        width 0.35s var(--curve-snap),
        color var(--transition-normal);
}

.top-bar-left-content {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    height: 48px;
    /* Grow into free space to the right — matches dock feel, avoids edge clipping. */
    transform-origin: left center;
    will-change: transform;
}

.top-bar-left,
.top-bar-left:hover,
.top-bar-left:active,
.top-bar-left:focus,
.top-bar-left:focus-visible {
    text-decoration: none;
    border-bottom: none;
}

.top-bar-left:hover,
.top-bar-left:active {
    color: var(--accent-blue, #5b9bf5);
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: auto;
}

.top-bar-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--avatar-frame-color);
    overflow: hidden;
    flex-shrink: 0;
    object-fit: cover;
    display: block;
    transition: border-color var(--transition-normal);
}

.top-bar-name {
    font-family: var(--font-display, 'Times New Roman', 'Noto Serif SC', 'Songti SC', 'SimSun', serif);
    font-weight: 700;
    font-style: normal;
    letter-spacing: -0.03em;
    font-size: 1.05rem;
    color: inherit;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.top-bar-name .name-latin {
    font-family: 'Times New Roman', serif;
    font-weight: 700;
    font-style: italic;
}

.top-bar-divider {
    width: 1px;
    height: 20px;
    background: rgba(0, 0, 0, 0.2);
    margin: 0 6px;
    flex-shrink: 0;
    transition: background-color var(--transition-normal);
}

[data-theme='dark'] .top-bar-divider {
    background: rgba(255, 255, 255, 0.12);
}

.top-bar-dock-item {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    border: none;
    background: transparent;
    color: inherit;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    transform-origin: center center;
    will-change: transform;
    transition:
        color var(--transition-normal),
        background-color var(--transition-normal);
    font-size: 17px;
    position: relative;
}

.top-bar-dock-item:hover {
    color: var(--accent-blue, #5b9bf5);
    background: transparent;
}

.top-bar-dock-item.active {
    color: inherit;
    background: transparent;
}

.top-bar-dock-item.active:hover {
    color: var(--accent-blue, #5b9bf5);
}

.top-bar-dock-item.has-text {
    width: auto;
    padding: 0 12px;
    gap: 6px;
}

.top-bar-dock-label {
    font-size: 1.05rem;
    font-weight: 700;
    white-space: nowrap;
}

.top-bar-dock-item.disabled {
    opacity: 0.3;
    pointer-events: none;
}

.top-bar-language-popup {
    position: fixed;
    background-color: rgba(255, 254, 247, 0.55);
    backdrop-filter: blur(40px) saturate(220%);
    border: 1px solid rgba(255, 255, 255, 0.5);
    color: #0a0a0a;
    border-radius: var(--radius-2xl);
    padding: 8px;
    min-width: 160px;
    box-shadow: var(--shadow-pop);
    z-index: var(--z-bar-popup, 3000);
    opacity: 0;
    transform: translateX(-50%) translateY(-6px) scale(0.96);
    pointer-events: none;
    transition:
        opacity 0.4s var(--curve-snap),
        transform 0.4s var(--curve-snap),
        background-color var(--transition-normal),
        border-color var(--transition-normal),
        color var(--transition-normal),
        box-shadow var(--transition-normal);
    view-transition-name: top-bar-popup;
}

[data-theme='dark'] .top-bar-language-popup {
    background-color: rgba(18, 18, 18, 0.8);
    border-color: rgba(255, 255, 255, 0.12);
    color: #ffffff;
}

.top-bar-language-popup[data-open] {
    opacity: 1;
    transform: translateX(-50%) translateY(0) scale(1);
    pointer-events: auto;
}

.top-bar-popup-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: inherit;
    opacity: 0.5;
    padding: 6px 12px 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.top-bar-popup-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    color: inherit;
    font-size: 0.9rem;
    transition:
        background 0.15s var(--curve-snap),
        color var(--transition-normal);
}

.top-bar-popup-option:hover {
    background: rgba(128, 128, 128, 0.15);
}

.top-bar-popup-option.selected {
    font-weight: 600;
}

.top-bar-popup-option .check-icon {
    width: 16px;
    opacity: 0;
    transition: opacity 0.15s var(--curve-snap);
}

.top-bar-popup-option.selected .check-icon {
    opacity: 1;
}

/* ===== Mobile Sidebar (hidden on desktop) ===== */
.top-bar-sidebar,
.top-bar-sidebar-overlay {
    display: none;
}

@media (max-width: 900px) {
    /* Floating left capsule (avatar + name) — replaces full-width mobile top bar */
    .top-bar {
        top: max(12px, env(safe-area-inset-top, 0px));
        left: max(12px, env(safe-area-inset-left, 0px));
        right: auto;
        width: auto;
        max-width: calc(100vw - 24px - env(safe-area-inset-left, 0px) - env(safe-area-inset-right, 0px));
        height: auto;
        min-height: 48px;
        padding: 6px 14px 6px 6px;
        border-radius: var(--radius-pill);
        border: 1px solid rgba(0, 0, 0, 0.12);
        border-bottom: 1px solid rgba(0, 0, 0, 0.12);
        box-shadow:
            0 4px 20px rgba(0, 0, 0, 0.12),
            0 1px 3px rgba(0, 0, 0, 0.06);
        gap: 0;
        justify-content: flex-start;
        z-index: calc(var(--z-dock, 10000) - 1);
        transition:
            transform 0.35s var(--curve-delicate),
            opacity 0.35s var(--curve-delicate),
            background-color var(--transition-normal),
            border-color var(--transition-normal),
            color var(--transition-normal),
            box-shadow var(--transition-normal);
    }

    [data-theme='dark'] .top-bar {
        border-color: rgba(255, 255, 255, 0.14);
        box-shadow:
            0 6px 24px rgba(0, 0, 0, 0.4),
            0 1px 3px rgba(0, 0, 0, 0.2);
    }

    .top-bar[data-capsule-hidden] {
        opacity: 0;
        pointer-events: none;
        transform: translateY(-12px) scale(0.94);
    }

    .top-bar-left {
        cursor: pointer;
        width: auto;
        overflow: visible;
        align-self: center;
    }

    .top-bar-left-content {
        gap: 10px;
        height: 36px;
    }

    .top-bar-avatar {
        width: 36px;
        height: 36px;
        border-radius: 50%;
    }

    .top-bar-name {
        font-size: 0.95rem;
        max-width: min(42vw, 160px);
    }

    .top-bar-right {
        display: none;
    }

    html.is-entering .top-bar {
        opacity: 0;
        transform: translateY(-12px) scale(0.94);
    }

    html.is-entering .top-bar[data-capsule-hidden] {
        opacity: 0;
        transform: translateY(-12px) scale(0.94);
    }

    /* ===== Mobile Sidebar ===== */
    .top-bar-sidebar {
        font-family: var(--font-ui, 'Inter', 'Noto Sans SC', sans-serif);
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: 72vw;
        max-width: 300px;
        z-index: calc(var(--z-dock, 10000) + 1);
        background: rgba(18, 18, 18, 0.9);
        backdrop-filter: blur(30px);
        border-right: 1px solid rgba(255, 255, 255, 0.12);
        box-shadow: 12px 0 48px rgba(0, 0, 0, 0.5);
        color: #ffffff;
        padding: 20px 0;
        transform: translateX(-100%);
        opacity: 0;
        pointer-events: none;
        transition:
            transform 0.35s var(--curve-snap),
            opacity 0.35s var(--curve-snap);
    }

    .top-bar-sidebar[data-open] {
        transform: translateX(0);
        opacity: 1;
        pointer-events: auto;
    }

    html:not([data-theme='dark']) .top-bar-sidebar.theme-light {
        background: rgba(255, 254, 247, 0.65);
        border-right-color: rgba(255, 255, 255, 0.5);
        box-shadow:
            4px 0 24px rgba(0, 0, 0, 0.08),
            inset -1px 0 0 rgba(255, 255, 255, 0.8);
        color: #0a0a0a;
    }

    html:not([data-theme='dark']) .sidebar-name {
        color: #0a0a0a;
    }

    html:not([data-theme='dark']) .sidebar-menu-item {
        color: #0a0a0a;
    }

    html:not([data-theme='dark']) .sidebar-menu-item:hover,
    html:not([data-theme='dark']) .sidebar-menu-item.active {
        background: rgba(0, 0, 0, 0.06);
    }

    html:not([data-theme='dark']) .sidebar-submenu-item {
        color: #333333;
    }

    html:not([data-theme='dark']) .sidebar-submenu-item:hover {
        background: rgba(0, 0, 0, 0.04);
    }

    html:not([data-theme='dark']) .sidebar-submenu-item.selected {
        background: rgba(0, 0, 0, 0.08);
    }

    html:not([data-theme='dark']) .sidebar-divider {
        background: rgba(0, 0, 0, 0.1);
    }

    html:not([data-theme='dark']) .sidebar-menu-icon,
    html:not([data-theme='dark']) .sidebar-menu-item > i:first-child {
        color: #0a0a0a;
    }

    html:not([data-theme='dark']) .expand-icon {
        color: #0a0a0a;
    }

    html:not([data-theme='dark']) .check-icon {
        color: #3e59ff;
    }

    /* Overlay */
    .top-bar-sidebar-overlay {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0);
        z-index: var(--z-dock, 10000);
        opacity: 0;
        pointer-events: none;
        transition:
            background-color 0.35s var(--curve-snap),
            opacity 0.35s var(--curve-snap);
    }

    .top-bar-sidebar-overlay[data-open] {
        background: rgba(0, 0, 0, 0.22);
        backdrop-filter: blur(10px) saturate(140%);
        opacity: 1;
        pointer-events: auto;
    }

    html:not([data-theme='dark']) .top-bar-sidebar-overlay[data-open] {
        background: rgba(0, 0, 0, 0.15);
    }

    /* Header */
    .sidebar-header {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 0 20px 16px;
    }

    .sidebar-avatar-frame {
        width: 48px;
        height: 48px;
        flex: 0 0 48px;
        border: 2px solid #555555;
        border-radius: var(--radius-sm);
        background-color: #1a1a1a;
        box-shadow:
            0 0 12px rgba(255, 200, 80, 0.25),
            0 0 4px rgba(255, 200, 80, 0.15),
            inset 0 0 6px rgba(255, 200, 80, 0.08);
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
    }

    .sidebar-avatar {
        width: 100%;
        height: 100%;
        border: none;
        box-shadow: none;
        background: transparent;
        object-fit: cover;
        display: block;
    }

    .sidebar-name {
        font-size: 1rem;
        font-weight: 600;
        color: #ffffff;
    }

    /* Divider */
    .sidebar-divider {
        flex: 0 0 var(--dock-divider-thickness, 1px);
        height: var(--dock-divider-thickness, 1px);
        min-height: var(--dock-divider-thickness, 1px);
        background: rgba(255, 255, 255, 0.15);
        margin: 8px 16px;
    }

    /* Menu item */
    .sidebar-menu-item {
        display: flex;
        align-items: center;
        gap: 14px;
        width: 100%;
        padding: 12px 20px;
        background: transparent;
        border: none;
        color: #fffef7;
        text-decoration: none;
        font-size: 1rem;
        cursor: pointer;
        transition: background-color 0.2s var(--curve-snap);
        text-align: left;
    }

    .sidebar-menu-item:visited {
        color: #fffef7;
    }

    .sidebar-menu-item:hover,
    .sidebar-menu-item.active {
        background: rgba(255, 255, 255, 0.12);
    }

    .sidebar-menu-icon,
    .sidebar-menu-item > i:first-child {
        width: 24px;
        height: 1rem;
        text-align: center;
        font-size: 1rem;
        color: #ffffff;
        flex-shrink: 0;
    }

    .expand-icon {
        width: 0.75rem;
        height: 0.75rem;
        margin-left: auto;
        font-size: 0.75rem;
        transition: transform 0.25s var(--curve-snap);
    }

    .sidebar-menu-item.expanded .expand-icon {
        transform: rotate(180deg);
    }

    /* Submenu (language list) */
    .sidebar-submenu {
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition:
            max-height 0.3s var(--curve-snap),
            opacity 0.25s var(--curve-snap);
    }

    .sidebar-submenu.expanded {
        max-height: 200px;
        opacity: 1;
    }

    .sidebar-submenu-item {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 10px 20px 10px 56px;
        cursor: pointer;
        font-size: 0.95rem;
        color: #e8e8ec;
        transition: background-color 0.2s var(--curve-snap);
    }

    .sidebar-submenu-item:hover {
        background: rgba(255, 255, 255, 0.1);
    }

    .sidebar-submenu-item.selected {
        background: rgba(255, 255, 255, 0.18);
    }

    .sidebar-submenu-item .check-icon {
        opacity: 0;
        width: 16px;
        color: var(--accent-blue);
        flex-shrink: 0;
        transition: opacity 0.15s var(--curve-snap);
    }

    .sidebar-submenu-item.selected .check-icon {
        opacity: 1;
    }

    .sidebar-menu-item.disabled {
        opacity: 0.3;
        pointer-events: none;
    }
}