:root {
    --primary-bg: #f4f7f9;
    --secondary-bg: #ffffff;
    --text-color: #333;
    --border-color: #ddd;
    --accent-color: #007bff;
    --danger-color: #dc3545;
    --danger-hover-bg: #ffeef0;
    --warning-text: #856404;
    --warning-bg: #fff3cd;
}

html {
    font-size: 85%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-color);
    margin: 0;
    padding: 1rem;
    display: flex;
    justify-content: center;
}

#app {
    max-width: 680px;
    width: 100%;
    background: var(--secondary-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.site-title {
    text-align: center;
    font-weight: bold;
    font-size: 1.4rem;
    color: #b8860b; /* A nice shade of gold */
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-family: "Segoe UI",-apple-system,BlinkMacSystemFont,Roboto,Helvetica,Arial,sans-serif;
}

h1 {
    text-align: center;
    color: var(--accent-color);
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.total-container {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1.5rem;
}

.total-container label {
    font-weight: bold;
    flex-shrink: 0;
}

input[type="number"], input[type="text"] {
    padding: 7px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    width: 100%;
    box-sizing: border-box;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

#total-amount {
    font-size: 1.1rem;
    font-weight: bold;
    width: auto;
    flex-grow: 1;
    max-width: 200px;
}

.table-container {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 1.25rem;
}

.table-header, .item-row {
    display: grid;
    grid-template-columns: 3fr 1.5fr 2fr 85px;
    gap: 8px;
    align-items: center;
    padding: 8px 12px;
}

.table-header {
    font-weight: bold;
    color: #555;
    background-color: #f9fafb;
    border-bottom: 1px solid var(--border-color);
}

.item-row:not(:last-child) {
     border-bottom: 1px solid var(--border-color);
}

.item-row {
    transition: background-color 0.2s ease-in-out;
}

.item-row:hover {
    background-color: #f4f7f9;
}

.item-row.dragging {
    opacity: 0.5;
}

.item-row.drag-over {
    border-top: 2px solid var(--accent-color);
}

.item-row .amount-value {
    font-family: monospace;
    text-align: right;
    padding-right: 4px;
    font-size: 1rem;
    color: #0056b3;
    font-weight: 500;
}

.actions {
    display: flex;
    justify-content: flex-end;
    gap: 3px;
}

.drag-handle {
    cursor: grab;
    padding: 0 6px;
    color: #999;
    font-size: 1rem;
    line-height: 1;
    align-self: center;
}

.drag-handle:hover {
    color: #333;
}

.delete-btn, .move-btn {
    background: none;
    border: 1px solid transparent;
    color: #555;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    padding: 0;
    border-radius: 50%;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.delete-btn {
    color: var(--danger-color);
}

.delete-btn:hover {
    background-color: var(--danger-hover-bg);
    color: #a71d2a;
}

.move-btn:hover {
    background-color: #e9ecef;
    color: #000;
}

.move-btn:disabled {
    color: #ccc;
    cursor: not-allowed;
    background-color: transparent;
}

#add-item-btn {
    display: block;
    width: 100%;
    padding: 10px;
    font-size: 0.9rem;
    font-weight: bold;
    color: var(--accent-color);
    background-color: #e7f1ff;
    border: 1px dashed var(--accent-color);
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    margin-bottom: 1.5rem;
}

#add-item-btn:hover {
    background-color: #d0e3ff;
}

#summary {
    background-color: #f9fafb;
    padding: 0.85rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.summary-item {
    display: flex;
    justify-content: space-between;
    padding: 7px 0;
    font-size: 1rem;
}
.summary-item:not(:last-child) {
    border-bottom: 1px solid #eee;
}

.summary-item span:first-child {
    font-weight: 500;
    color: #555;
}

.summary-item span:last-child {
    font-weight: bold;
    font-family: monospace;
}

#total-percentage.invalid {
    color: var(--danger-color);
}
#total-percentage.valid {
    color: #28a745;
}

#total-calculated-amount {
    color: var(--accent-color);
}

.warning {
    margin-top: 0.85rem;
    padding: 0.85rem;
    border-radius: 6px;
    background-color: var(--warning-bg);
    color: var(--warning-text);
    text-align: center;
    font-weight: 500;
}

.hidden {
    display: none;
}