:root {
    --bg: #f5f6f8;
    --panel: #ffffff;
    --border: #dfe2e7;
    --text: #1f2430;
    --muted: #6b7280;
    --accent: #2f6fed;
    --accent-hover: #2559c2;
    --error-bg: #fdecec;
    --error-text: #a12622;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.wrap {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

h1 {
    font-size: 22px;
    font-weight: 600;
    margin: 0;
}

button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
}

button:hover { background: var(--accent-hover); }

button.secondary {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--border);
}

button.secondary:hover {
    background: #eef2fb;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

th, td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

th {
    background: #fafbfc;
    color: var(--muted);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

tr:last-child td { border-bottom: none; }

.qty-input {
    width: 60px;
    padding: 6px 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
}

.actions {
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

#status {
    color: var(--muted);
    font-size: 14px;
}

.error {
    background: var(--error-bg);
    color: var(--error-text);
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
}

.start-position {
    margin-top: 24px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
}

.start-position label {
    display: block;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 10px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 44px);
    gap: 4px;
    width: fit-content;
}

.grid-cell {
    width: 44px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 12px;
    color: var(--muted);
    cursor: pointer;
    background: #fafbfc;
}

.grid-cell:hover {
    border-color: var(--accent);
}

.grid-cell.used {
    background: #e9ebef;
    color: #b3b7c0;
    text-decoration: line-through;
}

.grid-cell.start {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

#search-input {
    flex: 1;
    max-width: 420px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    background: var(--panel);
}

#search-input:focus {
    outline: none;
    border-color: var(--accent);
}

.result-count {
    color: var(--muted);
    font-size: 13px;
    white-space: nowrap;
}

.table-scroll {
    max-height: 60vh;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: 8px;
}

.table-scroll table {
    border: none;
    border-radius: 0;
}

.table-scroll thead th {
    position: sticky;
    top: 0;
    z-index: 1;
    box-shadow: 0 1px 0 var(--border);
}

.no-results {
    text-align: center;
    color: var(--muted);
    font-size: 14px;
    padding: 20px;
    margin: 0;
}

.selected-count {
    color: var(--muted);
    font-size: 14px;
}