:root {
    --bg-main: #f3f4f6;
    --bg-card: #ffffff;
    --fg-main: #1f2937;
    --fg-muted: #6b7280;
    --bg-input: #f9fafb;
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-green: #10b981;
    --border-color: #e5e7eb;
    
    /* Heatmap colors */
    --val-zero: #f9fafb;
    --val-low: #e0f2fe; /* light blue */
    --val-med: #bae6fd;
    --val-high: #7dd3fc;
}

body {
    background-color: var(--bg-main);
    color: var(--fg-main);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.dashboard-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    width: 95%;
    max-width: 1600px; /* Wider for tables */
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    margin: 40px 20px;
}

.header {
    text-align: center;
    margin-bottom: 25px;
}

.header h1 {
    margin: 0 0 10px 0;
    font-size: 28px;
    font-weight: 700;
}

.header p {
    color: var(--fg-muted);
    margin: 0;
    font-size: 15px;
}

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 25px;
    justify-content: center;
}
.tab {
    padding: 12px 30px;
    cursor: pointer;
    font-weight: 600;
    font-size: 16px;
    color: var(--fg-muted);
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s ease;
}
.tab:hover {
    color: var(--fg-main);
}
.tab.active {
    color: var(--accent-blue);
    border-bottom: 3px solid var(--accent-blue);
}
.tab-content {
    display: none;
}
.tab-content.active {
    display: block;
}

/* Dispatch Form Container */
.dispatch-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
    color: var(--fg-main);
}
.form-group .hint {
    font-size: 13px;
    color: var(--fg-muted);
    margin-bottom: 8px;
    display: block;
}

input[type="file"] {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--fg-main);
    font-size: 14px;
    box-sizing: border-box;
}

input[type="file"]::file-selector-button {
    background-color: var(--accent-blue);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    margin-right: 15px;
    font-weight: 600;
    transition: background-color 0.2s;
}

input[type="file"]::file-selector-button:hover {
    background-color: var(--accent-blue-hover);
}

.btn-submit {
    display: block;
    width: 100%;
    background-color: var(--accent-green);
    color: white;
    border: none;
    padding: 15px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-top: 15px;
}

.btn-submit:hover {
    background-color: #059669;
}

/* Summary Cards */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.card-title {
    font-size: 13px;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--fg-muted);
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.card-value {
    font-size: 32px;
    font-weight: 800;
    color: var(--accent-blue);
}

/* Table styles */
.month-group {
    margin-bottom: 40px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.month-title {
    background: #f8fafc;
    padding: 15px 20px;
    font-size: 18px;
    font-weight: 700;
    color: var(--fg-main);
    border-bottom: 1px solid var(--border-color);
    margin: 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

th, td {
    border-bottom: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    padding: 10px 8px;
    text-align: center;
}

th:last-child, td:last-child {
    border-right: none;
}

th {
    background-color: #f1f5f9;
    font-weight: 600;
    color: #334155;
    position: sticky;
    top: 0;
}

td.date-col {
    font-weight: 600;
    background-color: #f8fafc;
}

.row-total {
    background-color: #e2e8f0 !important;
    font-weight: 700;
    font-size: 14px;
}
.row-total td {
    border-top: 2px solid #cbd5e1;
}

/* Heatmap coloring */
.val-zero { color: #94a3b8; }
.val-low { background-color: var(--val-low); color: #0369a1; font-weight: 600;}
.val-med { background-color: var(--val-med); color: #0369a1; font-weight: 700;}
.val-high { background-color: var(--val-high); color: #075985; font-weight: 800;}

tr:hover td {
    background-color: #f1f5f9;
}