/* AubeData — Styles + Thème clair/sombre */
:root {
    --bg: #ffffff;
    --bg-secondary: #f1f5f9;
    --bg-tertiary: #e2e8f0;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #cbd5e1;
    --accent: #4f8ef7;
    --accent-hover: #3b7de6;
    --danger: #ef4444;
    --success: #22c55e;
    --card-bg: #ffffff;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.1);
    --cell-selected: #dbeafe;
    --cell-active: #bfdbfe;
    --header-bg: #f8fafc;
    --toolbar-bg: #ffffff;
    --modal-overlay: rgba(0,0,0,0.4);
}

body.dark {
    --bg: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --border: #475569;
    --card-bg: #1e293b;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.3);
    --cell-selected: #1e3a5f;
    --cell-active: #1e4a7f;
    --header-bg: #1e293b;
    --toolbar-bg: #1e293b;
    --modal-overlay: rgba(0,0,0,0.7);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    overflow: hidden;
    height: 100vh;
}

/* --- Views --- */
.view { display: none; height: 100vh; flex-direction: column; }
.view.active { display: flex; }

/* --- Login --- */
#view-login {
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
}

.login-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--card-shadow);
}

.login-logo {
    text-align: center;
    margin-bottom: 24px;
}

.login-logo h1 {
    font-size: 28px;
    color: var(--accent);
}

.login-logo p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 4px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus {
    border-color: var(--accent);
}

.btn-primary {
    width: 100%;
    padding: 10px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary:hover { background: var(--accent-hover); }

.login-error {
    color: var(--danger);
    font-size: 13px;
    text-align: center;
    margin-top: 12px;
    min-height: 20px;
}

/* --- Dashboard Header --- */
.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    background: var(--toolbar-bg);
}

.dashboard-header h1 {
    font-size: 22px;
    color: var(--accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.accent:hover { background: var(--accent-hover); }

#user-name {
    font-size: 13px;
    color: var(--text-secondary);
}

/* --- Spreadsheet Grid (Dashboard) --- */
.dashboard-content {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

#spreadsheet-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.section-title {
    grid-column: 1 / -1;
    font-size: 16px;
    color: var(--text-secondary);
    margin-top: 16px;
}

.spreadsheet-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.spreadsheet-card:hover {
    border-color: var(--accent);
    box-shadow: 0 2px 8px rgba(79,142,247,0.15);
}

.card-icon {
    width: 40px;
    height: 40px;
    color: var(--accent);
    margin-bottom: 12px;
}

.card-icon.shared-icon { color: var(--success); }

.card-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-meta {
    font-size: 12px;
    color: var(--text-secondary);
}

.card-actions {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.2s;
}

.spreadsheet-card:hover .card-actions { opacity: 1; }

.btn-icon {
    width: 28px;
    height: 28px;
    border: none;
    background: var(--bg-secondary);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--text);
    transition: all 0.2s;
}

.btn-icon:hover { background: var(--bg-tertiary); }
.btn-icon.danger:hover { background: var(--danger); color: #fff; }

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

/* --- Editor --- */
.editor-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    background: var(--toolbar-bg);
}

#btn-back {
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 18px;
    color: var(--text);
    border-radius: 6px;
}

#btn-back:hover { background: var(--bg-secondary); }

#spreadsheet-title {
    flex: 1;
    border: none;
    background: none;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    outline: none;
    padding: 4px 8px;
    border-radius: 4px;
}

#spreadsheet-title:hover,
#spreadsheet-title:focus {
    background: var(--bg-secondary);
}

#save-status {
    font-size: 12px;
    color: var(--text-secondary);
}

.editor-actions {
    display: flex;
    gap: 6px;
}

/* --- Toolbar --- */
.toolbar {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-bottom: 1px solid var(--border);
    background: var(--toolbar-bg);
    flex-wrap: wrap;
}

.toolbar-separator {
    width: 1px;
    height: 24px;
    background: var(--border);
    margin: 0 4px;
}

.toolbar button {
    height: 30px;
    min-width: 30px;
    padding: 0 8px;
    border: none;
    background: none;
    cursor: pointer;
    border-radius: 4px;
    font-size: 13px;
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
}

.toolbar button:hover { background: var(--bg-secondary); }

.toolbar input[type="color"] {
    width: 30px;
    height: 30px;
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    padding: 2px;
    background: none;
}

/* --- Formula Bar --- */
.formula-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px;
    border-bottom: 1px solid var(--border);
    background: var(--toolbar-bg);
}

#cell-name {
    width: 70px;
    text-align: center;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px;
    font-size: 13px;
    font-weight: 600;
    background: var(--bg);
    color: var(--text);
}

.formula-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

#formula-input {
    flex: 1;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 13px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    background: var(--bg);
    color: var(--text);
    outline: none;
}

#formula-input:focus { border-color: var(--accent); }

/* --- Spreadsheet Grid --- */
.grid-container {
    flex: 1;
    overflow: auto;
    position: relative;
}

.sheet-table {
    border-collapse: collapse;
    table-layout: fixed;
    font-size: 13px;
}

.sheet-table th,
.sheet-table td {
    border: 1px solid var(--border);
    padding: 0;
    height: 26px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.corner {
    width: 40px;
    min-width: 40px;
    background: var(--header-bg);
    position: sticky;
    top: 0;
    left: 0;
    z-index: 3;
}

.col-header {
    background: var(--header-bg);
    text-align: center;
    font-weight: 600;
    font-size: 12px;
    color: var(--text-secondary);
    position: sticky;
    top: 0;
    z-index: 2;
    user-select: none;
}

.row-header {
    width: 40px;
    min-width: 40px;
    background: var(--header-bg);
    text-align: center;
    font-weight: 600;
    font-size: 12px;
    color: var(--text-secondary);
    position: sticky;
    left: 0;
    z-index: 1;
    user-select: none;
}

.cell {
    padding: 2px 6px;
    cursor: cell;
    user-select: none;
    min-width: 100px;
}

.cell.selected {
    background: var(--cell-selected) !important;
}

.cell.active {
    outline: 2px solid var(--accent);
    outline-offset: -1px;
}

.cell-input {
    width: 100%;
    height: 100%;
    border: none;
    outline: none;
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
    padding: 2px 4px;
    font-family: inherit;
}

/* --- Sheet Tabs --- */
.sheet-tabs-bar {
    display: flex;
    align-items: center;
    border-top: 1px solid var(--border);
    background: var(--toolbar-bg);
    padding: 0 8px;
    min-height: 32px;
    overflow-x: auto;
}

.sheet-tab {
    padding: 6px 16px;
    font-size: 12px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    white-space: nowrap;
    transition: all 0.2s;
}

.sheet-tab:hover { color: var(--text); background: var(--bg-secondary); }
.sheet-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.add-tab {
    font-size: 16px;
    font-weight: bold;
    padding: 4px 12px;
}

.sheet-tab-actions {
    margin-left: auto;
    display: flex;
    gap: 4px;
    padding: 0 8px;
}

/* --- Modals --- */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--modal-overlay);
    z-index: 100;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active { display: flex; }

.modal {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal h2 {
    margin-bottom: 16px;
    font-size: 18px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 20px;
    color: var(--text);
    border-radius: 6px;
}

.modal-close:hover { background: var(--bg-secondary); }

/* Chart modal wider */
#chart-modal .modal { max-width: 700px; }

#chart-preview {
    width: 100%;
    height: 350px;
    margin: 16px 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

#chart-preview canvas { max-width: 100%; max-height: 100%; }

.chart-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.chart-controls select,
.chart-controls input {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
}

/* Share */
.share-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}

.share-form {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.share-form input,
.share-form select {
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
}

.share-form input { flex: 1; min-width: 140px; }

.empty-share { color: var(--text-secondary); font-size: 13px; }

/* --- Responsive --- */
@media (max-width: 768px) {
    .dashboard-header { padding: 12px 16px; }
    .dashboard-header h1 { font-size: 18px; }
    #spreadsheet-list { grid-template-columns: 1fr; }
    .toolbar { gap: 2px; padding: 4px 8px; }
    .editor-header { gap: 8px; padding: 6px 8px; }
    .formula-bar { padding: 4px 8px; }
    #cell-name { width: 55px; font-size: 12px; }
    .header-actions { gap: 8px; }
    .editor-actions .btn span { display: none; }
    .chart-controls { flex-direction: column; }
    .share-form { flex-direction: column; }
}

@media (max-width: 480px) {
    .login-card { margin: 16px; padding: 24px; }
    .toolbar button { min-width: 28px; height: 28px; }
    .toolbar-separator { display: none; }
}