/* Core Variables & Resets */
:root {
    --bg-primary: #f0f2f5;
    --card-bg: #ffffff;
    --table-border: #000000;
    --header-bg: #e0e0e0;
    --cell-blacken: #808080;
    --text-primary: #1a1a1a;
    --primary-color: #2563eb;
    --danger-color: #dc2626;
    --transition-speed: 0.15s;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    justify-content: center;
}

.app-container {
    background-color: var(--card-bg);
    max-width: 1200px;
    width: 100%;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

header h1 {
    font-size: 1.8rem;
    color: #111827;
    margin-bottom: 1.5rem;
    text-align: center;
    font-weight: 700;
}

/* Controls & Toolbar */
.controls-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
}

.tabs {
    display: flex;
    gap: 0.5rem;
    background-color: #f3f4f6;
    padding: 0.3rem;
    border-radius: 8px;
}

.tab-btn {
    padding: 0.5rem 1.5rem;
    border: none;
    background: transparent;
    font-weight: 600;
    font-size: 1rem;
    color: #4b5563;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    background-color: var(--card-bg);
    color: var(--primary-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.toolbar-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.export-group {
    display: flex;
    align-items: center;
}

select {
    padding: 0.6rem;
    font-size: 0.95rem;
    border: 1px solid #d1d5db;
    border-right: none;
    border-radius: 6px 0 0 6px;
    background-color: #f9fafb;
    outline: none;
    cursor: pointer;
}

select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border-radius: 0 6px 6px 0;
}

.btn-primary:hover {
    background-color: #1d4ed8;
}

.btn-danger {
    background-color: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
    border-radius: 6px;
}

.btn-danger:hover {
    background-color: #fef2f2;
}

.legend-panel {
    background-color: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    padding: 0.75rem 1rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.legend-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--table-border);
    font-size: 0.85rem;
    min-width: 60px;
    background-color: white;
}

.legend-badge.state-blacken {
    background-color: var(--cell-blacken);
    color: white;
}

.legend-badge.state-cross {
    font-weight: bold;
}

.legend-badge.state-cross::after {
    content: "x";
    display: block;
}

.legend-badge.state-both {
    background-color: var(--cell-blacken);
    font-weight: bold;
}

.legend-badge.state-both::after {
    content: "x";
    display: block;
}

.auto-save-text {
    margin-left: auto;
    color: #059669;
    font-style: italic;
    font-size: 0.85rem;
}

/* Table Area */
.view-section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.view-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.export-wrapper {
    overflow-x: auto;
    background-color: white;
    /* Important for html2canvas */
    padding: 10px;
    /* Slight padding to ensure borders aren't clipped on export */
}

.gantt-chart {
    border-collapse: collapse;
    width: 100%;
    min-width: 900px;
    /* Force minimum width to prevent squishing */
    font-family: Arial, sans-serif;
    /* Fallback for safe docx export */
    font-size: 13px;
    color: #000;
}

.gantt-chart th,
.gantt-chart td {
    border: 1px solid var(--table-border);
    padding: 6px 4px;
    text-align: center;
    vertical-align: middle;
    height: 32px;
}

/* Specific column targeting */
.gantt-chart td:first-child,
.gantt-chart th:first-child {
    text-align: left;
    width: 250px;
    white-space: normal;
    padding-left: 8px;
}

.gantt-chart th,
.header-title {
    font-weight: bold;
    background-color: var(--header-bg);
}

.w-col {
    width: 38px;
    min-width: 38px;
    line-height: 1.1;
}

/* Editable Date Cells */
.date-cell {
    background-color: #fafafa;
    cursor: text;
    transition: background-color 0.2s;
    font-size: 11px;
    /* Slightly smaller text for dates */
    font-weight: bold;
    color: #4b5563;
}

.date-cell:focus {
    background-color: #ffffff;
    outline: 2px solid var(--primary-color);
    outline-offset: -2px;
}

.date-cell:empty::before {
    content: "Edit";
    color: #cbd5e1;
    font-style: italic;
    font-weight: normal;
    display: none;
    /* Only show on hover for cleaner look */
}

.date-cell:hover:empty::before {
    display: inline;
}

/* Interactive cell styles matching logic */
.interactive-cell {
    cursor: pointer;
    user-select: none;
    transition: background-color 0.1s;
}

.interactive-cell:hover {
    background-color: #e5e7eb;
}

.interactive-cell.blacken {
    background-color: var(--cell-blacken);
}

.interactive-cell.cross {
    font-weight: bold;
    font-size: 14px;
    color: #000;
}

.interactive-cell.cross::after {
    content: "x";
}

.interactive-cell.both {
    background-color: var(--cell-blacken);
    font-weight: bold;
    font-size: 14px;
    color: #000;
}

.interactive-cell.both::after {
    content: "x";
}

.interactive-cell.blacken:hover,
.interactive-cell.both:hover {
    background-color: #666666;
    /* slightly darker on hover */
}

/* Dedicated Danger Zone */
.danger-zone {
    margin-top: 3rem;
    padding: 1.5rem;
    background-color: #fef2f2;
    border: 1px solid #f87171;
    border-radius: 8px;
    text-align: left;
}

.danger-zone h2 {
    font-size: 1.25rem;
    color: #991b1b;
    margin-bottom: 0.5rem;
}

.danger-zone p {
    color: #b91c1c;
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.danger-zone .modal-warning {
    font-weight: bold;
    margin-bottom: 1rem;
}