/* Contenitori principali */
#sheet-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background-color: #e9e9e9;
    position: relative;
}

#column-headers-container {
    display: flex;
    height: 20px;
    background-color: #f3f3f3;
    position: relative;
    z-index: 10;
    border-bottom: 1px solid #d6d6d6;
    flex-shrink: 0;
    overflow: hidden; /* il clipping avviene qui (area visibile), non su #column-headers */
}

#corner-header {
    width: 60px;
    height: 20px;
    border-right: 1px solid #d6d6d6;
    background-color: #f3f3f3;
    flex-shrink: 0;
}

#column-headers {
    flex: 1;
    overflow: visible; /* le colonne oltre il box (Q..Z) non vanno clippate qui: il translate sullo scroll le rivela, clippate dal contenitore */
    background-color: #f3f3f3;
    position: relative;
    display: flex;
}

/* Intestazioni colonne */
.col-header {
    width: 80px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-right: 1px solid #d6d6d6;
    background-color: #f3f3f3;
    font-size: 11px;
    font-weight: 400;
    user-select: none;
    position: relative;
    flex-shrink: 0;
    box-sizing: border-box;
    color: #333;
    cursor: pointer;
}

.col-header:hover {
    background-color: #e8e8e8;
}

#sheet-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    background-color: white;
    position: relative;
}

#row-headers {
    width: 60px;
    background-color: #f3f3f3;
    overflow: visible; /* stesso motivo delle colonne: le righe oltre il box vengono rivelate dal translate, clippate da #sheet-container */
    flex-shrink: 0;
    border-right: 1px solid #d6d6d6;
    position: relative;
}

/* Intestazioni righe */
.row-header {
    width: 60px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid #d6d6d6;
    background-color: #f3f3f3;
    font-size: 11px;
    font-weight: 400;
    user-select: none;
    flex-shrink: 0;
    box-sizing: border-box;
    color: #333;
    cursor: pointer;
}

.row-header:hover {
    background-color: #e8e8e8;
}

/* Handle di resize colonne */
.col-resize-handle {
    position: absolute;
    right: 0;
    top: 0;
    width: 5px;
    height: 100%;
    cursor: col-resize;
    z-index: 5;
    background: transparent;
}

.col-resize-handle:hover,
.col-resize-handle:active {
    background: #217346;
    opacity: 0.6;
}

/* Handle di resize righe */
.row-resize-handle {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 5px;
    cursor: row-resize;
    z-index: 5;
    background: transparent;
}

.row-resize-handle:hover,
.row-resize-handle:active {
    background: #217346;
    opacity: 0.6;
}

#spreadsheet-viewport {
    flex: 1;
    overflow: auto;
    position: relative;
    background-color: white;
    min-width: 0;
    min-height: 0; /* consente al foglio di restringersi così la status bar resta sempre visibile */
}

#spreadsheet {
    position: relative;
    background-color: white;
    display: inline-block;
}

/* Celle della griglia */
.cell {
    position: absolute;
    width: 80px;
    height: 20px;
    border-right: 1px solid #d6d6d6;
    border-bottom: 1px solid #d6d6d6;
    padding: 0;
    font-family: Calibri, 'Segoe UI', Arial, sans-serif;
    font-size: 11px;
    overflow: hidden;
    background-color: white;
    user-select: none;
    outline: none;
    white-space: nowrap;
    text-overflow: ellipsis;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    cursor: cell;
    color: #333;
}

.cell.selected {
    /* Box-shadow inset crea un overlay azzurro SENZA sovrascrivere il fill color della cella */
    box-shadow: inset 0 0 0 999px rgba(0, 120, 212, 0.06);
    z-index: 4;
}

.cell.active {
    outline: 2px solid #217346;
    outline-offset: -1px;
    z-index: 6;
}

.cell.selected-top {
    border-top: 2px solid #217346 !important;
}

.cell.selected-bottom {
    border-bottom: 2px solid #217346 !important;
}

.cell.selected-left {
    border-left: 2px solid #217346 !important;
}

.cell.selected-right {
    border-right: 2px solid #217346 !important;
}

/* Stili per il contenuto delle celle */
.cell-content {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    padding: 1px 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cell-number {
    justify-content: flex-end;
}

.cell-text {
    justify-content: flex-start;
}

.cell-formula {
    /* Le formule mostrano il risultato con lo stesso stile delle altre celle */
}

/* Stili di formattazione */
.cell-bold {
    font-weight: bold;
}

.cell-italic {
    font-style: italic;
}

.cell-underline {
    text-decoration: underline;
}

/* Gridlines toggle */
#spreadsheet.hide-gridlines .cell {
    border-color: transparent;
}

/* Comments & Notes indicators */
.cell.has-comment::after {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 0; height: 0;
    border-left: 6px solid transparent;
    border-top: 6px solid #ff6b00;
}
.cell.has-note::after {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 0; height: 0;
    border-left: 6px solid transparent;
    border-top: 6px solid #4472c4;
}

/* View modes */
#sheet-area.view-page-layout {
    background: #808080;
}
#sheet-area.view-page-break .cell {
    opacity: 0.9;
}
.page-break-line {
    pointer-events: none;
}

/* Drawing objects */
.drawing-object {
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    transition: box-shadow 0.2s;
}
.drawing-object:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.25);
    outline: 2px dashed #217346;
}

/* Split divider */
.split-divider:hover {
    background: #217346 !important;
    height: 4px !important;
}

/* Menu dropdown */
.menu-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    border: 1px solid #d6d6d6;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    z-index: 1000;
    display: none;
    padding: 4px 0;
    border-radius: 2px;
}

.menu-dropdown.show {
    display: block;
}

.menu-option {
    padding: 6px 32px 6px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    position: relative;
    font-size: 12px;
    user-select: none;
    color: #333;
}

.menu-option:hover {
    background-color: #f3f3f3;
}

.menu-option.disabled {
    color: #a6a6a6;
    cursor: default;
}

.menu-option.disabled:hover {
    background-color: transparent;
}

.menu-separator {
    height: 1px;
    background-color: #e1e1e1;
    margin: 4px 0;
}

.menu-shortcut {
    margin-left: auto;
    color: #666;
    font-size: 11px;
    padding-left: 20px;
}

.menu-option.has-submenu::after {
    content: "▶";
    position: absolute;
    right: 8px;
    font-size: 8px;
    color: #666;
}

/* Submenu */
.submenu {
    position: absolute;
    top: -4px;
    left: 100%;
    background-color: white;
    border: 1px solid #d6d6d6;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    z-index: 1001;
    display: none;
    padding: 4px 0;
    border-radius: 2px;
}

.menu-option:hover > .submenu {
    display: block;
}

/* Scrollbar personalizzate */
#spreadsheet-viewport::-webkit-scrollbar {
    width: 17px;
    height: 17px;
}

#spreadsheet-viewport::-webkit-scrollbar-track {
    background: #f3f3f3;
}

#spreadsheet-viewport::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border: 4px solid #f3f3f3;
    border-radius: 10px;
}

#spreadsheet-viewport::-webkit-scrollbar-thumb:hover {
    background: #a6a6a6;
}

#spreadsheet-viewport::-webkit-scrollbar-corner {
    background: #f3f3f3;
}