/* ============================================================================
   Project Sidebar
   Minimalistic, modern, clean. Fully responsive (desktop / tablet / mobile).
   ============================================================================ */

/* ---------- Container ------------------------------------------------------ */

.project-sidebar {
    position: relative;
    display: none;
    flex-direction: column;
    height: 100%;
    min-width: 280px;
    max-width: 280px;
    box-sizing: border-box;
    background: var(--background);
    color: var(--text-color);
    border-right: 1px solid var(--border-color);
    overflow: hidden;
    font-size: 14px;
}

.project-sidebar.visible {
    display: flex;
}

/* ---------- Desktop header ------------------------------------------------- */

.project-sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 14px 10px;
    min-height: 50px;
    box-sizing: border-box;
}

.project-sidebar-header-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    color: var(--text-color);
}

.project-sidebar-header-icon svg {
    width: 22px;
    height: 22px;
}

.project-sidebar-header-icon .workspace-icon-emoji {
    font-size: 22px !important;
    line-height: 1;
}

.project-sidebar-header-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-color);
    letter-spacing: -0.005em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.project-sidebar-header .project-sidebar-manage-memory,
.project-sidebar-mobile-header .project-sidebar-manage-memory {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    min-width: 32px;
    padding: 0;
    gap: 0;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--text-color-secondary);
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease, opacity 0.15s ease;
    flex-shrink: 0;
}

.project-sidebar-header .project-sidebar-manage-memory > span,
.project-sidebar-mobile-header .project-sidebar-manage-memory > span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
}

.project-sidebar-header .project-sidebar-manage-memory svg,
.project-sidebar-mobile-header .project-sidebar-manage-memory svg {
    width: 18px;
    height: 18px;
    min-width: 18px;
    min-height: 18px;
    fill: none;
}

.project-sidebar-header .project-sidebar-manage-memory:disabled,
.project-sidebar-header .project-sidebar-manage-memory.is-disabled,
.project-sidebar-mobile-header .project-sidebar-manage-memory:disabled,
.project-sidebar-mobile-header .project-sidebar-manage-memory.is-disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.project-sidebar-header .project-sidebar-manage-memory:focus-visible,
.project-sidebar-mobile-header .project-sidebar-manage-memory:focus-visible {
    outline: none;
    background: var(--hover);
    color: var(--text-color);
}

@media (hover: hover) and (pointer: fine) {
    .project-sidebar-header .project-sidebar-manage-memory:hover:not(:disabled):not(.is-disabled),
    .project-sidebar-mobile-header .project-sidebar-manage-memory:hover:not(:disabled):not(.is-disabled) {
        background: var(--hover);
        color: var(--text-color);
    }
}

/* ---------- Main scrollable area ------------------------------------------- */

.project-sidebar-main {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    gap: 14px;
    padding: 4px 10px 16px;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.project-sidebar-main::-webkit-scrollbar {
    width: 6px;
}
.project-sidebar-main::-webkit-scrollbar-track {
    background: transparent;
}
.project-sidebar-main::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 3px;
}

/* ---------- Tab list (Chats / Files) --------------------------------------- */

.project-sidebar-tab-list {
    position: relative;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px;
    padding: 3px;
    background: var(--hover);
    border-radius: 10px;
    margin: 0 2px;
}

.project-sidebar-tab {
    padding: 6px 10px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-color-tertiary);
    text-align: center;
    border-radius: 7px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.project-sidebar-tab:focus-visible {
    outline: 2px solid var(--primary-color, currentColor);
    outline-offset: 1px;
}

.project-sidebar-tab.active {
    background: var(--background);
    color: var(--text-color);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

@media (hover: hover) and (pointer: fine) {
    .project-sidebar-tab:not(.active):hover {
        color: var(--text-color);
    }
}

/* ---------- Content ------------------------------------------------------- */

.project-sidebar-content {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    gap: 14px;
}

.project-sidebar-files-section,
.project-sidebar-chats-section {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    min-height: 0;
}

/* Hide files list when files section has no content */
.project-sidebar-files,
.project-sidebar-chats {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-height: 0;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.project-sidebar-files::-webkit-scrollbar,
.project-sidebar-chats::-webkit-scrollbar {
    width: 6px;
}
.project-sidebar-files::-webkit-scrollbar-thumb,
.project-sidebar-chats::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 3px;
}

/* ---------- Action buttons (upload) ---------------------------------------- */

.project-sidebar-upload-file {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    height: 36px;
    padding: 6px 10px;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-color);
    font-size: 14px;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.project-sidebar-upload-file:focus-visible {
    outline: none;
    background: var(--hover);
}

@media (hover: hover) and (pointer: fine) {
    .project-sidebar-upload-file:hover:not(:disabled):not(.is-disabled) {
        background: var(--hover);
    }
}

.project-sidebar-upload-file:disabled,
.project-sidebar-upload-file.is-disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.project-sidebar-upload-file > span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    color: var(--text-color-secondary);
    flex-shrink: 0;
}

.project-sidebar-upload-file > p {
    flex: 1;
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ---------- Section headers (Pinned / Chats) ------------------------------- */

.project-sidebar .sidebar-section {
    padding-left: 0;
}

.project-sidebar .sidebar-section + .sidebar-section {
    margin-top: 8px;
}

.project-sidebar .sidebar-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px 4px;
    cursor: pointer;
    user-select: none;
}

.project-sidebar .sidebar-section-header p {
    margin: 0;
}

.project-sidebar .sidebar-section-header-right {
    color: var(--text-color-tertiary);
}

.project-sidebar .chats-container {
    padding-right: 0;
}

.project-sidebar [data-section-list] {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.project-sidebar .sidebar-section:not(.collapsed) [data-section-list] .sidebar-element {
    max-height: 34px;
}

.project-sidebar [data-section-list] .sidebar-element > .sidebar-element-button {
    height: 34px;
    padding: 6px 10px;
    border-radius: 8px;
    font-size: 14px;
}

.project-sidebar [data-section-list] .sidebar-element.active > .sidebar-element-button {
    background: var(--hover);
}

.project-sidebar [data-section-list] .sidebar-element.active > .sidebar-element-button > p {
    font-weight: 500;
    color: var(--text-color);
}

.project-sidebar .sidebar-element > .select-dropdown {
    z-index: 2100;
}

.project-sidebar .sidebar-element > .select-dropdown .select-submenu {
    z-index: 2101;
}

/* ---------- File rows ------------------------------------------------------ */

.project-sidebar-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 8px;
    border-radius: 8px;
    background: transparent;
    border: 1px solid transparent;
    transition: background-color 0.15s ease, border-color 0.15s ease;
    cursor: pointer;
}

@media (hover: hover) and (pointer: fine) {
    .project-sidebar-row:hover {
        background: var(--hover);
    }
}

.project-sidebar-row:focus-visible {
    outline: none;
    background: var(--hover);
    border-color: var(--border-color);
}

.project-sidebar-row-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: var(--hover);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-color-secondary);
    letter-spacing: 0.02em;
    flex-shrink: 0;
}

.project-sidebar-row-icon[data-ext]::after {
    content: attr(data-ext);
}

.project-sidebar-row-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
    gap: 1px;
}

.project-sidebar-row-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-color);
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1.3;
}

.project-sidebar-row-meta {
    margin: 0;
    font-size: 11px;
    color: var(--text-color-tertiary);
    line-height: 1.3;
}

.project-sidebar-row-action {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    padding: 0;
    border: none;
    background: transparent;
    color: var(--text-color-tertiary);
    border-radius: 6px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s ease, background-color 0.15s ease, color 0.15s ease;
    flex-shrink: 0;
}

.project-sidebar-row-action svg {
    width: 16px;
    height: 16px;
}

@media (hover: hover) and (pointer: fine) {
    .project-sidebar-row:hover .project-sidebar-row-action {
        opacity: 1;
    }

    .project-sidebar-row-action:hover {
        background: var(--border-color);
        color: var(--text-color);
    }
}

/* Touch devices: actions always visible */
@media (hover: none) {
    .project-sidebar-row-action {
        opacity: 1;
    }
}

/* ---------- Empty states --------------------------------------------------- */

.project-sidebar-empty {
    text-align: center;
    padding: 24px 14px;
    color: var(--text-color-tertiary);
    font-size: 13px;
    line-height: 1.5;
}

.project-sidebar-empty-icon {
    width: 28px;
    height: 28px;
    margin: 0 auto 8px;
    color: var(--text-color-tertiary);
    opacity: 0.7;
}

.project-sidebar-empty-icon svg {
    width: 100%;
    height: 100%;
}

[data-mode="dark"] .project-sidebar-empty {
    color: var(--text-color-tertiary);
}

/* ---------- Info box ------------------------------------------------------- */

.project-sidebar-info-box {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 8px;
    background: var(--hover);
    font-size: 12px;
    line-height: 1.45;
    color: var(--text-color-secondary);
}

.project-sidebar-info-box svg {
    flex-shrink: 0;
    margin-top: 1px;
    width: 14px;
    height: 14px;
    color: var(--text-color-tertiary);
}

.project-sidebar-info-box span {
    flex: 1;
}

/* ---------- Project chat placeholder (main area) --------------------------- */

.project-chat-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 16px;
    text-align: center;
    color: var(--text-color-secondary);
    gap: 14px;
}

.project-chat-placeholder-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: var(--hover);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color-secondary);
}

.project-chat-placeholder-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color);
    margin: 0;
}

.project-chat-placeholder-text {
    font-size: 14px;
    margin: 0;
    color: var(--text-color-secondary);
    max-width: 360px;
}

.project-chat-placeholder-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: none;
    border-radius: 999px;
    padding: 10px 18px;
    background: var(--primary-color);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    line-height: 1.2;
    user-select: none;
    transition: background-color 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.project-chat-placeholder-action svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    stroke: currentColor;
}

.project-chat-placeholder-action:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 25%, transparent);
}

@media (hover: hover) and (pointer: fine) {
    .project-chat-placeholder-action:hover:not(.is-disabled):not(:disabled) {
        background-color: color-mix(in srgb, var(--primary-color) 88%, var(--hover) 12%);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
    }
}

.project-chat-placeholder-action:active:not(.is-disabled):not(:disabled) {
    transform: translateY(0);
}

.project-chat-placeholder-action.is-disabled,
.project-chat-placeholder-action:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    box-shadow: none;
}

/* ============================================================================
   Mobile / Tablet overlay sidebar
   ============================================================================ */

/* ---- Mobile toggle button (in chat header) -------------------------------- */

.project-sidebar-mobile-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: var(--text-color);
    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.1s ease;
}

@media (hover: hover) and (pointer: fine) {
    .project-sidebar-mobile-toggle:hover {
        background: var(--hover);
    }
}

.project-sidebar-mobile-toggle:active {
    transform: scale(0.95);
}

.project-sidebar-mobile-toggle:focus-visible {
    outline: none;
    background: var(--hover);
}

.project-sidebar-mobile-toggle svg {
    width: 20px;
    height: 20px;
}

/* ---- Backdrop ------------------------------------------------------------- */

.project-sidebar-backdrop {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.4);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    z-index: 1099;
}

.project-sidebar-backdrop.visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

[data-mode="dark"] .project-sidebar-backdrop {
    background-color: rgba(0, 0, 0, 0.6);
}

/* ---- Mobile header (visible inside the sidebar on tablet/mobile) ---------- */

.project-sidebar-mobile-header {
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
    background: var(--background);
    position: sticky;
    top: 0;
    z-index: 10;
    min-height: 56px;
    box-sizing: border-box;
}

.project-sidebar-mobile-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    flex: 1;
}

.project-sidebar-mobile-header-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.project-sidebar-mobile-header-left .project-sidebar-header-icon {
    flex-shrink: 0;
}

.project-sidebar-mobile-header-left .project-sidebar-header-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 15px;
    font-weight: 600;
}

.project-sidebar-mobile-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: var(--text-color);
    cursor: pointer;
    flex-shrink: 0;
    transition: background-color 0.15s ease;
}

@media (hover: hover) and (pointer: fine) {
    .project-sidebar-mobile-close:hover {
        background: var(--hover);
    }
}

.project-sidebar-mobile-close:focus-visible {
    outline: none;
    background: var(--hover);
}

.project-sidebar-mobile-close svg {
    width: 18px;
    height: 18px;
}

/* ---- Drag handle (mobile bottom sheet) ------------------------------------ */

.project-sidebar-drag-handle {
    display: none;
    justify-content: center;
    align-items: center;
    height: 18px;
    padding-top: 8px;
    cursor: grab;
    touch-action: none;
    background: var(--background);
}

.project-sidebar-drag-handle:active {
    cursor: grabbing;
}

.project-sidebar-drag-handle-bar {
    width: 38px;
    height: 4px;
    border-radius: 2px;
    background-color: var(--border-color);
}

[data-mode="dark"] .project-sidebar-drag-handle-bar {
    background-color: rgba(255, 255, 255, 0.22);
}

/* ============================================================================
   Breakpoints
   ============================================================================ */

/* Tablet + mobile: show toggle, show mobile header, hide desktop header */
@media (max-width: 1280px) {
    .project-sidebar-mobile-toggle {
        display: flex;
    }

    .project-sidebar-mobile-header {
        display: flex;
    }

    .project-sidebar-header {
        display: none;
    }
}

/* Tablet (right-side slide-in panel) */
@media (min-width: 769px) and (max-width: 1280px) {
    .project-sidebar {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        z-index: 1100;
        min-width: 360px;
        max-width: 360px;
        border-right: none;
        border-left: 1px solid var(--border-color);
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
        box-shadow: -8px 0 32px rgba(0, 0, 0, 0.12);
    }

    .project-sidebar.visible {
        display: flex;
        transform: translateX(0);
    }

    [data-mode="dark"] .project-sidebar {
        box-shadow: -8px 0 32px rgba(0, 0, 0, 0.4);
    }
}

/* Mobile bottom-sheet */
@media (max-width: 768px) {
    .project-sidebar {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        top: auto;
        z-index: 1100;
        min-width: 100%;
        max-width: 100%;
        max-height: 88vh;
        max-height: 88dvh;
        border-radius: 18px 18px 0 0;
        border-right: none;
        border-top: 1px solid var(--border-color);
        box-shadow: 0 -10px 36px rgba(0, 0, 0, 0.18);
        transform: translateY(100%);
        transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
        padding-bottom: env(safe-area-inset-bottom, 0);
    }

    .project-sidebar.visible {
        display: flex;
        transform: translateY(0);
    }

    .project-sidebar-drag-handle {
        display: flex;
        flex-shrink: 0;
    }

    .project-sidebar-mobile-header {
        border-bottom: 1px solid var(--border-color);
        background: var(--background);
        position: sticky;
        top: 0;
    }

    .project-sidebar-main {
        padding: 8px 12px 16px;
        -webkit-overflow-scrolling: touch;
    }

    .project-sidebar-tab-list {
        position: sticky;
        top: 0;
        z-index: 5;
        background: var(--background);
        margin: 0;
    }

    [data-mode="dark"] .project-sidebar {
        box-shadow: 0 -10px 36px rgba(0, 0, 0, 0.5);
    }
}

/* Compact mobile */
@media (max-width: 480px) {
    .project-sidebar {
        max-height: 92vh;
        max-height: 92dvh;
        border-radius: 16px 16px 0 0;
    }

    .project-sidebar-mobile-header {
        padding: 10px 12px;
        min-height: 52px;
    }

    .project-sidebar-mobile-header-left .project-sidebar-header-title {
        font-size: 14px;
    }

    .project-sidebar-main {
        padding: 8px 10px 14px;
    }
}

/* Landscape mobile */
@media (max-width: 900px) and (orientation: landscape) and (max-height: 600px) {
    .project-sidebar {
        max-height: 95vh;
        max-height: 95dvh;
    }
}

/* Touch targets: larger hit areas for fingers */
@media (hover: none) and (pointer: coarse) {
    .project-sidebar-tab {
        padding: 10px 16px;
        font-size: 14px;
    }

    /* Allow wrapper to grow for taller touch buttons */
    .project-sidebar .project-sidebar-main > .sidebar-element {
        max-height: none;
    }

    .project-sidebar-upload-file {
        height: 48px;
        padding: 10px 12px;
    }

    .project-sidebar-row {
        padding: 10px 8px;
        min-height: 52px;
    }

    .project-sidebar .sidebar-section:not(.collapsed) [data-section-list] .sidebar-element {
        max-height: 44px;
    }

    .project-sidebar [data-section-list] .sidebar-element > .sidebar-element-button {
        height: 44px;
    }

    .project-sidebar-mobile-close,
    .project-sidebar-mobile-header .project-sidebar-manage-memory,
    .project-sidebar-mobile-toggle {
        width: 40px;
        height: 40px;
        min-width: 40px;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .project-sidebar,
    .project-sidebar-backdrop,
    .project-sidebar-mobile-toggle,
    .project-sidebar-mobile-close,
    .project-sidebar-tab,
    .project-sidebar-row,
    .project-sidebar-row-action,
    .project-sidebar-manage-memory,
    .project-sidebar-upload-file,
    .project-chat-placeholder-action {
        transition-duration: 0.01ms !important;
    }
}

/* Respect project-wide reduced animations preference (if used) */
.reduced-animations .project-sidebar,
.reduced-animations .project-sidebar-backdrop,
.reduced-animations .project-sidebar-tab,
.reduced-animations .project-sidebar-row,
.reduced-animations .project-sidebar-row-action,
.reduced-animations .project-sidebar-manage-memory,
.reduced-animations .project-sidebar-upload-file {
    transition: none !important;
}