.file-history-modal__backdrop{background-color:var(--app-scrim,var(--doc-scrim));-webkit-backdrop-filter:blur(var(--app-blur-panel));backdrop-filter:blur(var(--app-blur-panel));z-index:var(--app-z-modal);justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.file-history-modal__dialog{background-color:var(--card-bg,var(--app-bg-card));border:1px solid var(--border-color,var(--app-border));border-radius:var(--app-radius-xl);box-shadow:var(--doc-shadow-lg,var(--shadow-lg));flex-direction:column;width:100%;max-width:1050px;max-height:85vh;display:flex;overflow:hidden}.file-history-modal__header{border-bottom:1px solid var(--border-color,var(--app-border));background-color:var(--surface-alt,var(--app-bg-hover));justify-content:space-between;align-items:center;padding:.75rem 1rem;display:flex}.file-history-modal__title-group{align-items:center;gap:.5rem;min-width:0;display:flex}.file-history-modal__icon{color:var(--primary,var(--app-accent))}.file-history-modal__title{font-size:var(--app-type-body);color:var(--text-color,var(--app-text));font-weight:600}.file-history-modal__path{font-size:var(--app-type-footnote);color:var(--text-muted,var(--app-text-secondary))}.file-history-modal__close-btn{color:var(--text-muted,var(--app-text-secondary));border-radius:var(--app-radius-sm);cursor:pointer;transition:all var(--app-motion-fast);background:0 0;border:none;padding:.25rem}.file-history-modal__close-btn:hover{color:var(--text-color,var(--app-text));background-color:var(--card-bg-hover,var(--app-bg-hover))}.file-history-modal__body{flex:1;min-height:380px;display:flex;overflow:hidden}.file-history-modal__sidebar{border-right:1px solid var(--border-color,var(--app-border));background-color:var(--surface-alt,var(--app-bg-main));flex-direction:column;width:280px;display:flex;overflow-y:auto}.file-history-modal__list-title{font-size:var(--app-type-caption);color:var(--text-muted,var(--app-text-secondary));text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--border-color,var(--app-border));padding:.5rem .75rem;font-weight:600}.file-history-modal__list{margin:0;padding:0;list-style:none}.file-history-modal__item{border-bottom:1px solid var(--border-color,var(--app-border));cursor:pointer;transition:background-color var(--app-motion-fast);flex-direction:column;gap:.25rem;padding:.5rem .75rem;display:flex}.file-history-modal__item:hover{background-color:var(--card-bg-hover,var(--app-bg-hover))}.file-history-modal__item.is-selected{background-color:var(--highlight-bg,var(--app-accent-bg));border-left:3px solid var(--primary,var(--app-accent))}.file-history-modal__item-header{justify-content:space-between;align-items:center;display:flex}.file-history-modal__source-badge{font-size:var(--app-type-caption);border-radius:var(--app-radius-xs);text-transform:uppercase;padding:.0625rem .375rem;font-weight:600}.file-history-modal__source-badge.is-assistant_edit,.file-history-modal__source-badge.is-assistant_create{background-color:var(--status-emerald-bg);color:var(--status-emerald-text)}.file-history-modal__source-badge.is-baseline{color:var(--text-muted);background-color:color-mix(in srgb, var(--text-muted) 12%, transparent)}.file-history-modal__source-badge.is-manual_save{background-color:var(--app-accent-chip-bg);color:var(--primary,var(--app-accent))}.file-history-modal__source-badge.is-revert{background-color:var(--status-amber-bg);color:var(--amber)}.file-history-modal__item-time{font-size:var(--app-type-caption);color:var(--text-muted,var(--app-text-secondary))}.file-history-modal__item-summary{font-size:var(--app-type-footnote);color:var(--text-muted,var(--app-text-secondary))}.file-history-modal__empty-text{font-size:var(--app-type-footnote);color:var(--text-muted,var(--app-text-secondary));text-align:center;padding:1rem}.file-history-modal__diff-pane{background-color:var(--card-bg,var(--app-bg-card));flex-direction:column;flex:1;display:flex;overflow:hidden}.file-history-modal__diff-toolbar{border-bottom:1px solid var(--border-color,var(--app-border));background-color:var(--surface-alt,var(--app-bg-hover));justify-content:space-between;align-items:center;padding:.5rem .75rem;display:flex}.file-history-modal__diff-label{font-size:var(--app-type-footnote);color:var(--text-muted,var(--app-text-secondary))}.file-history-modal__diff-content{flex-direction:column;flex:1;min-height:0;padding:.5rem;display:flex;position:relative;overflow:auto}.file-history-modal__diff-content>.diff-editor{flex:auto}.file-history-modal__empty-diff{text-align:center;font-size:var(--app-type-footnote);color:var(--text-muted,var(--app-text-secondary));padding:2rem}.file-history-modal__footer{border-top:1px solid var(--border-color,var(--app-border));background-color:var(--surface-alt,var(--app-bg-hover));justify-content:space-between;align-items:center;padding:.75rem 1rem;display:flex}.file-history-modal__footer-note{font-size:var(--app-type-caption);color:var(--text-muted,var(--app-text-secondary))}.file-history-modal__cancel-btn{border-radius:var(--app-radius-sm);font-size:var(--app-type-footnote);color:var(--text-muted,var(--app-text-secondary));cursor:pointer;transition:all var(--app-motion-fast);background:0 0;border:1px solid #0000;padding:.25rem .75rem}.file-history-modal__cancel-btn:hover{background-color:var(--card-bg-hover,var(--app-bg-hover));color:var(--text-color,var(--app-text))}.file-history-modal__restore-btn{background-color:var(--doc-header-primary-btn,var(--primary-fill,var(--app-accent)));color:var(--primary-contrast,var(--app-accent-band-text));border-radius:var(--app-radius-sm);font-size:var(--app-type-footnote);cursor:pointer;box-shadow:var(--doc-shadow-sm,var(--shadow-sm));transition:all var(--app-motion-fast);border:none;align-items:center;gap:.375rem;padding:.25rem .75rem;font-weight:600;display:inline-flex}.file-history-modal__restore-btn:hover{filter:brightness(1.15);box-shadow:var(--doc-shadow-md,var(--shadow-md))}.file-history-modal__item{text-align:left;width:100%;color:var(--text-color);font:inherit;background:0 0;border-top:0;border-left:3px solid #0000;border-right:0}.file-history-modal__item.is-selected{background:var(--app-accent-chip-bg)}.file-history-modal__item:focus-visible,.file-history-modal__dialog button:focus-visible{outline:2px solid var(--primary);outline-offset:-2px}.file-history-modal__empty-diff{min-height:16rem;font-size:var(--app-type-body);flex-direction:column;justify-content:center;align-items:center;gap:.75rem;display:flex}.file-history-modal__empty-diff strong{color:var(--text-color);font-size:var(--app-type-title-3)}.file-history-modal__empty-diff p{margin:0}.file-history-modal__restore-btn:disabled{opacity:.5;cursor:default;filter:none;box-shadow:none}.file-history-modal__title-group{flex-wrap:wrap}.file-history-modal__path{overflow-wrap:anywhere}.file-history-modal__sidebar{flex-shrink:0}.file-history-modal__diff-pane{min-width:0}.file-history-modal__footer-note,.file-history-modal__item-time,.file-history-modal__item-summary{font-size:var(--app-type-callout)}.file-history-modal__source-badge{text-transform:none;font-size:var(--app-type-callout)}@media (max-width:768px){.file-history-modal__body{flex-direction:column}.file-history-modal__sidebar{border-right:0;border-bottom:1px solid var(--border-color);width:100%;max-height:10rem}.file-history-modal__diff-toolbar,.file-history-modal__footer{flex-wrap:wrap;gap:.5rem}.file-history-modal__empty-diff{min-height:12rem}}