/* 複数テスター割当用スタイル */
.assignment-row {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    margin-bottom: 10px;
    padding: 12px;
    background: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

.assignment-row input[type="number"],
.assignment-row select {
    flex: 1;
    min-width: 150px;
    padding: 8px 10px;
    font-weight: 500;
}

.assignment-row select:focus {
    border-color: #667eea;
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* 未選択の場合は警告色 */
.assignment-row select:invalid,
.assignment-row select[value=""] {
    border-color: #f59e0b;
    background-color: #fffbeb;
}

.assignment-row .form-group {
    margin: 0;
    flex: 1;
}

.assignment-row .form-group label {
    font-size: 0.85em;
    margin-bottom: 4px;
}

.assignment-row button {
    margin-top: 20px;
    padding: 8px 12px;
    background: #dc3545;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.3s;
}

.assignment-row button:hover {
    background: #c82333;
}

.scheduled-assignment-row td {
    vertical-align: middle;
    padding: 12px 8px;
}

.scheduled-assignment-row input[type="date"],
.scheduled-assignment-row input[type="number"],
.scheduled-assignment-row select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 0.95em;
    min-height: 38px;
}

.scheduled-assignment-row select {
    min-width: 150px;
    background-color: white;
    font-weight: 500;
}

.scheduled-assignment-row select:focus {
    border-color: #667eea;
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.scheduled-assignment-row select option {
    padding: 8px;
}

/* 未選択の場合は警告色 */
.scheduled-assignment-row select:invalid,
.scheduled-assignment-row select[value=""] {
    border-color: #f59e0b;
    background-color: #fffbeb;
}

.scheduled-assignment-row input[type="date"] {
    min-width: 140px;
}

.scheduled-assignment-row input[type="number"] {
    min-width: 80px;
}

.scheduled-assignment-row .btn-danger {
    padding: 6px 12px;
    font-size: 0.85em;
}

.empty-assignments {
    text-align: center;
    padding: 30px;
    color: #999;
    font-size: 0.9em;
}

.assignment-tester-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.assignment-tester-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: #e7f3ff;
    border: 1px solid #a5d8ff;
    border-radius: 12px;
    font-size: 0.85em;
    color: #0066cc;
}

.assignment-tester-tag .hours {
    font-weight: 600;
}

.assignment-tester-tag.scheduled {
    background: #fff3e0;
    border-color: #ffe0b2;
    color: #e65100;
}