/* ============================================================
   DROPDOWN MENUS (shared across sidebar + chat)
   ============================================================ */

.dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    min-width: 100%;
    background: var(--chrome-bg2);
    border: 1px solid var(--chrome-border);
    border-radius: var(--radius);
    padding: 4px;
    z-index: var(--z-dropdown);
    max-height: 320px;
    overflow-y: auto;
    box-shadow: var(--shadow-md);
}

#doc-menu {
    min-width: 180px;
    left: 13px;
    right: 10px;
}
#thread-menu {
    min-width: 180px;
    left: 0;
    right: 0;
}

.dropdown-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    font-size: 12px;
    color: var(--t2);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--dur), color var(--dur);
    min-width: 0;
}
.dropdown-item > span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}
.dropdown-item:hover { background: var(--chrome-hover); color: var(--t1); }
.dropdown-item.active { color: var(--t1); background: var(--chrome-hover); }

.dropdown-item .dd-del {
    opacity: 0; background: none; border: none;
    color: var(--t3); cursor: pointer; font-size: 14px; padding: 0 2px;
}
.dropdown-item:hover .dd-del { opacity: 1; }
.dropdown-item .dd-del:hover { color: var(--red); }

.dropdown-divider {
    height: 1px;
    background: var(--chrome-border);
    margin: 4px 0;
}

.dropdown-action {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    font-size: 12px;
    color: var(--t2);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--dur), color var(--dur);
}
.dropdown-action:hover { background: var(--chrome-hover); color: var(--t1); }
.dropdown-action.danger { color: var(--red); }
.dropdown-action.danger:hover { background: var(--red-bg); color: var(--red); }
.dropdown-action svg { flex-shrink: 0; }
.dropdown-action.disabled { opacity: 0.55; pointer-events: none; }

/* ============================================================
   BUTTONS
   ============================================================ */

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px; height: 28px;
    border-radius: var(--radius-sm);
    border: none;
    background: none;
    color: var(--t3);
    cursor: pointer;
    transition: background var(--dur), color var(--dur);
}
.btn-icon:hover { background: var(--chrome-hover); color: var(--t1); }

/* -- Shared button base -- */
.btn-ghost, .btn-primary, .btn-danger, .btn-accept, .btn-reject,
.btn-preview-restore, .btn-preview-close,
.btn-accept-bar, .btn-reject-bar {
    font: 500 12px var(--sans);
    padding: 6px 16px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--dur) var(--ease);
    white-space: nowrap;
}

/* Full-size buttons for modals and primary actions */
.btn-ghost, .btn-primary, .btn-danger {
    font-size: 13px;
    padding: 8px 20px;
}

.btn-ghost {
    background: none;
    border: 1px solid var(--chrome-border);
    color: var(--t2);
}
.btn-ghost:hover { border-color: var(--t3); color: var(--t1); background: var(--chrome-hover); }

.btn-primary {
    background: var(--accent);
    border: 1px solid transparent;
    color: var(--btn-text);
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active { transform: scale(0.98); }

.btn-danger {
    background: var(--red);
    border: 1px solid transparent;
    color: var(--btn-text);
}
.btn-danger:hover { background: var(--red-hover); }

.btn-accept {
    background: none;
    border: 1px solid var(--green-border);
    color: var(--green);
}
.btn-accept:hover { background: var(--green-bg); border-color: var(--green); }

.btn-reject {
    background: none;
    border: 1px solid var(--red-border);
    color: var(--red);
}
.btn-reject:hover { background: var(--red-bg); border-color: var(--red); }

/* Compat aliases — .btn-accept-bar / .btn-reject-bar map to .btn-accept / .btn-reject */
.btn-accept-bar {
    background: none; border: 1px solid var(--green-border);
    color: var(--green);
}
.btn-accept-bar:hover { background: var(--green-bg); border-color: var(--green); }
.btn-reject-bar {
    background: none; border: 1px solid var(--red-border);
    color: var(--red);
}
.btn-reject-bar:hover { background: var(--red-bg); border-color: var(--red); }

/* ============================================================
   MODAL
   ============================================================ */

#modal-overlay {
    position: fixed; inset: 0;
    background: var(--overlay-bg);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 22vh;
    z-index: var(--z-modal);
    backdrop-filter: blur(2px);
}

#modal-box {
    background: var(--chrome-bg2);
    border: 1px solid var(--chrome-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow-md);
}

.modal-title { font: 500 16px var(--sans); color: var(--t1); margin-bottom: 10px; }
.modal-body { font-size: 13px; color: var(--t2); line-height: 1.6; margin-bottom: 16px; }

.modal-input {
    width: 100%;
    background: var(--chrome-surface);
    border: 1px solid var(--chrome-border);
    border-radius: var(--radius);
    color: var(--t1);
    font: 13px var(--sans);
    padding: 10px 14px;
    outline: none;
    margin-bottom: 14px;
    transition: border-color var(--dur);
}
.modal-input:focus { border-color: var(--accent-border); }

.modal-field { margin-bottom: 12px; }
.modal-field:last-child { margin-bottom: 0; }
.modal-field label { display: block; font: 500 11px var(--sans); color: var(--t3); margin-bottom: 5px; letter-spacing: 0.02em; }
.modal-field textarea,
.modal-field input[type="text"] {
    width: 100%;
    background: var(--chrome-surface);
    border: 1px solid var(--chrome-border);
    border-radius: var(--radius);
    color: var(--t1);
    font: 13px var(--sans);
    padding: 8px 12px;
    outline: none;
    transition: border-color var(--dur);
    resize: vertical;
}
.modal-field textarea:focus,
.modal-field input[type="text"]:focus { border-color: var(--accent-border); }

.modal-actions { display: flex; justify-content: flex-end; gap: 10px; }

/* ============================================================
   MODAL — Panel variant (account-panel style)
   ============================================================ */

/* Overlay in panel mode — stronger blur, positioned over document */
#modal-overlay.modal-panel-mode {
    backdrop-filter: blur(6px);
    align-items: center;
    justify-content: flex-start;
    padding-top: 0;
}

/* Box in panel mode — wider, flex layout, centered on document area */
#modal-overlay.modal-panel-mode #modal-box {
    max-width: 620px;
    padding: 0;
    height: min(480px, calc(100vh - 80px));
    display: flex;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    /* --panel-left is set by JS to center the main content area over #center-column */
    position: absolute;
    left: var(--panel-left, 50%);
    top: 50%;
    transform: translate(-50%, -50%);
}

/* ---- Sidebar ---- */
.modal-panel-sidebar {
    width: 160px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    padding: 16px 8px;
    border-right: 1px solid var(--chrome-border);
    background: var(--chrome-bg);
}
.modal-panel-sidebar-title {
    font: 500 13px var(--sans);
    color: var(--t1);
    padding: 4px 10px 14px;
}
.modal-panel-nav {
    display: flex;
    flex-direction: column;
    gap: 1px;
}
.modal-panel-nav-item {
    display: block;
    width: 100%;
    padding: 6px 10px;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    font: 400 13px var(--sans);
    color: var(--t2);
    text-align: left;
    cursor: pointer;
    transition: background var(--dur), color var(--dur);
}
.modal-panel-nav-item:hover {
    background: var(--chrome-hover);
    color: var(--t1);
}
.modal-panel-nav-item.active {
    background: var(--chrome-surface);
    color: var(--t1);
}
.modal-panel-nav-item.disabled {
    opacity: 0.35;
    pointer-events: none;
    cursor: default;
}

/* ---- Main area ---- */
.modal-panel-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}
.modal-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px 12px;
    flex-shrink: 0;
}
.modal-panel-title {
    font: 500 15px var(--sans);
    color: var(--t1);
}
.modal-panel-close {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--t3);
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--dur), color var(--dur);
}
.modal-panel-close:hover {
    background: var(--chrome-hover);
    color: var(--t1);
}

/* ---- Scrollable content (fills available height) ---- */
.modal-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 0 20px 16px;
    display: flex;
    flex-direction: column;
}
/* Panes fill the content area */
.modal-panel-content [data-pane] {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* ---- Footer (caption + actions pinned at bottom) ---- */
.modal-panel-footer {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-top: 1px solid var(--chrome-border);
}
.modal-panel-caption {
    flex: 1;
    min-width: 0;
    background: var(--chrome-surface);
    border: 1px solid var(--chrome-border);
    border-radius: var(--radius-sm);
    color: var(--t1);
    font: 13px var(--sans);
    padding: 6px 10px;
    outline: none;
    transition: border-color var(--dur);
    caret-color: var(--accent);
}
.modal-panel-caption:hover { border-color: var(--panel-border); }
.modal-panel-caption:focus { border-color: var(--accent-border); }
.modal-panel-caption::placeholder { color: var(--t3); opacity: 0.5; }
.modal-panel-footer-actions {
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}

/* ============================================================
   SCROLLBAR — .scrollable class
   ============================================================ */

::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: transparent; border-radius: var(--radius-xs); transition: background 0.2s; }

.scrollable::-webkit-scrollbar-thumb,
#chat-messages::-webkit-scrollbar-thumb,
#toc-section::-webkit-scrollbar-thumb,
#revision-list::-webkit-scrollbar-thumb,
.tool-result::-webkit-scrollbar-thumb,
.source-quote-box::-webkit-scrollbar-thumb,
.dropdown-list::-webkit-scrollbar-thumb { background: var(--scroll-thumb); }
#document-scroll::-webkit-scrollbar { width: 8px; }
#document-scroll::-webkit-scrollbar-thumb { background: var(--scroll-thumb-hover); border-radius: var(--radius-xs); }
#document-scroll::-webkit-scrollbar-thumb:hover { background: rgba(140,115,65,0.7); }

.scrollable:hover::-webkit-scrollbar-thumb,
#chat-messages:hover::-webkit-scrollbar-thumb,
#toc-section:hover::-webkit-scrollbar-thumb,
#revision-list:hover::-webkit-scrollbar-thumb,
.tool-result:hover::-webkit-scrollbar-thumb,
.source-quote-box:hover::-webkit-scrollbar-thumb,
.dropdown-list:hover::-webkit-scrollbar-thumb { background: var(--scroll-thumb-hover); }

.scrollable::-webkit-scrollbar-thumb:hover,
#document-scroll::-webkit-scrollbar-thumb:hover,
#chat-messages::-webkit-scrollbar-thumb:hover,
#toc-section::-webkit-scrollbar-thumb:hover,
#revision-list::-webkit-scrollbar-thumb:hover { background: var(--scroll-thumb-active); }

/* ============================================================
   UTILITY
   ============================================================ */

.hidden { display: none !important; }

/* ============================================================
   ANIMATIONS — shared keyframes
   ============================================================ */

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

/* ============================================================
   HELP MODAL — first-run tips
   ============================================================ */

.help-modal-lead {
    font: 400 13px/1.55 var(--sans);
    color: var(--t2);
    margin-bottom: 14px;
}
.help-modal-tips {
    list-style: none;
    padding: 0;
    margin: 0 0 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.help-modal-tips li {
    font: 400 13px/1.55 var(--sans);
    color: var(--t2);
    padding-left: 18px;
    position: relative;
}
.help-modal-tips li::before {
    content: '';
    position: absolute;
    left: 4px; top: 8px;
    width: 5px; height: 5px;
    border-radius: 50%;
    background: var(--accent);
}
.help-modal-tips strong { color: var(--t1); font-weight: 600; }
.help-modal-tips kbd {
    font: 500 11px var(--mono);
    background: var(--chrome-surface);
    border: 1px solid var(--chrome-border);
    border-radius: var(--radius-xs);
    padding: 1px 5px;
    color: var(--t1);
}
.help-modal-dismiss {
    display: flex;
    align-items: center;
    gap: 6px;
    font: 400 12px var(--sans);
    color: var(--t3);
    margin: 12px 0 0;
    cursor: pointer;
}
.help-modal-dismiss input { cursor: pointer; }

/* ============================================================
   EMPTY STATE — shared primitive
   ============================================================ */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 24px 16px;
    gap: 10px;
    color: var(--t3);
}
.empty-state-icon {
    color: var(--t3);
    opacity: 0.55;
    margin-bottom: 4px;
}
.empty-state-title {
    font: 500 14px var(--sans);
    color: var(--t1);
    line-height: 1.4;
}
.empty-state-desc {
    font: 400 12px/1.55 var(--sans);
    color: var(--t3);
    max-width: 320px;
}
.empty-state-actions {
    display: flex;
    gap: 8px;
    margin-top: 8px;
    flex-wrap: wrap;
    justify-content: center;
}
.empty-state-actions button {
    font: 500 12px var(--sans);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: none;
    border: 1px solid var(--chrome-border);
    color: var(--t2);
    transition: background var(--dur), color var(--dur), border-color var(--dur);
}
.empty-state-actions button:hover {
    background: var(--chrome-hover);
    color: var(--t1);
    border-color: var(--t3);
}

/* Document-context variant — used inside the papyrus surface */
.empty-state.empty-state--doc { color: var(--td3); }
.empty-state.empty-state--doc .empty-state-icon { color: var(--td3); }
.empty-state.empty-state--doc .empty-state-title { color: var(--td1); }
.empty-state.empty-state--doc .empty-state-desc { color: var(--td3); }
.empty-state.empty-state--doc .empty-state-actions button {
    border-color: var(--doc-border);
    color: var(--td2);
    background: none;
}
.empty-state.empty-state--doc .empty-state-actions button:hover {
    border-color: var(--doc-ochre);
    color: var(--doc-ochre);
    background: var(--doc-hover-subtle);
}

/* ============================================================
   CONTEXT MENU (document actions)
   ============================================================ */

.context-menu {
    position: fixed;
    background: var(--chrome-bg2);
    border: 1px solid var(--chrome-border);
    border-radius: var(--radius);
    padding: 4px;
    z-index: var(--z-dropdown);
    min-width: 160px;
    box-shadow: var(--shadow-sm);
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    font-size: 12px;
    color: var(--t2);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--dur), color var(--dur);
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}
.context-menu-item:hover { background: var(--chrome-hover); color: var(--t1); }
.context-menu-item.danger { color: var(--red); }
.context-menu-item.danger:hover { background: var(--red-bg); }

/* ============================================================
   DRAG-AND-DROP OVERLAY
   ============================================================ */

#drop-overlay {
    position: fixed;
    inset: 0;
    z-index: var(--z-overlay);
    background: var(--overlay-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}
.drop-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    padding: 48px 72px;
    border: 2px dashed var(--accent);
    border-radius: var(--radius-lg);
    background: var(--accent-subtle);
    color: var(--accent);
    transition: background var(--dur);
}
.drop-label {
    font: 500 16px var(--sans);
    color: var(--accent);
}
.drop-formats {
    font: 400 12px var(--sans);
    color: var(--t3);
}

/* Restore warning toast */
.restore-warning {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(12px);
    background: var(--warning);
    color: var(--btn-text);
    font: 500 13px/1.4 var(--sans);
    padding: 8px 18px;
    border-radius: 8px;
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s;
    z-index: var(--z-overlay);
    pointer-events: none;
    max-width: 480px;
    text-align: center;
}
.restore-warning.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ============================================================
   TOAST NOTIFICATIONS
   ============================================================ */

#toast-container {
    position: fixed;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-overlay);
    display: flex;
    flex-direction: column-reverse;
    gap: var(--space-2);
    pointer-events: none;
}
.toast {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius);
    font: 500 13px/1.4 var(--sans);
    max-width: 420px;
    text-align: center;
    pointer-events: auto;
    cursor: pointer;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.toast-visible { opacity: 1; transform: translateY(0); }
.toast-error   { background: var(--red); color: var(--btn-text); }
.toast-success { background: var(--green); color: var(--btn-text); }
.toast-info    { background: var(--chrome-surface); color: var(--t1); border: 1px solid var(--chrome-border); }

/* ============================================================
   SAVE INDICATOR
   ============================================================ */

.save-indicator {
    position: fixed;
    top: var(--space-2);
    right: var(--space-4);
    font: 400 11px var(--sans);
    color: var(--t3);
    opacity: 0;
    transition: opacity var(--dur);
    z-index: var(--z-sticky);
    pointer-events: none;
}
.save-indicator.visible { opacity: 1; }